CN111099829B

CN111099829B - Transparent microcrystalline glass, microcrystalline glass product and preparation method thereof

Info

Publication number: CN111099829B
Application number: CN201811265216.5A
Authority: CN
Inventors: 原保平; 于天来
Original assignee: Huawei Technologies Co Ltd; CDGM Glass Co Ltd
Current assignee: Huawei Technologies Co Ltd; CDGM Glass Co Ltd
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2021-03-09
Anticipated expiration: 2038-10-26
Also published as: CN111099829A

Abstract

The invention discloses transparent glass ceramics, a glass ceramics product and a preparation method thereof. The main crystalline phase of the transparent glass-ceramic contains lithium silicate and quartz crystalline phases, and the composition of the transparent glass-ceramic comprises the following components in percentage by weight: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O: 0 to 10 percent; MgO: 0 to 10 percent; ZnO: 0 to 10% of (SiO)₂+Li₂O)/Al₂O₃6 to 15. The microcrystalline glass and the microcrystalline glass product have the advantages of ensuring the mechanical properties of falling resistance, compression resistance, scratch resistance and the like, also having proper grain size and lower haze, and being widely applied to display equipment or electronic equipment.

Description

Transparent microcrystalline glass, microcrystalline glass product and preparation method thereof

Technical Field

The invention relates to microcrystalline glass, a microcrystalline glass product and a preparation method thereof, in particular to transparent microcrystalline glass with high light transmittance, a transparent microcrystalline glass product and a preparation method thereof.

Background

A glass ceramics is a material in which crystals are precipitated inside the glass by heat treatment of the glass. The crystallized glass can have physical properties that cannot be obtained in glass due to crystals dispersed therein. For example, the mechanical strength such as Young's modulus and fracture toughness, the etching characteristics with an acidic or alkaline chemical solution, the thermal properties such as the thermal expansion coefficient, and the increase and decrease of the glass transition temperature. The microcrystalline glass has higher mechanical properties, and because the microcrystalline is formed in the glass, the bending resistance, the wear resistance and the like of the microcrystalline glass have obvious advantages compared with the common glass.

Based on the above advantages, at present, the microcrystalline glass or the glass product after processing thereof is applied to display devices or electronic devices with high requirements on drop resistance, pressure resistance and scratch resistance. In particular, for display devices or electronic devices requiring a clear display, high light transmittance is required, which requires a microcrystalline glass having a suitable crystal grain size and low haze. Chinese patent CN108218237A discloses a microcrystalline glass and a preparation method thereof, wherein the microcrystalline glass has a large grain size and a high haze, and is difficult to meet the requirement of the microcrystalline glass for a device with a high light transmittance. Therefore, development of a transparent glass-ceramic and a glass-ceramic product with excellent mechanical properties and high light transmittance has become an objective sought by technologists.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a transparent glass-ceramic product with excellent light transmittance.

(1) A transparent glass-ceramic article having a main crystal phase comprising a lithium silicate and a quartz crystal phase, said transparent glass-ceramic article having a 0.55mm thickness and a light transmittance at a wavelength of 550nm of 80% or more, and having a composition comprising, in weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；Na₂O：0～5％。

(2) Transparent glass-ceramic articles having a composition, expressed in weight percent, comprising: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；Na₂O：0～5％。

(3) Transparent glass-ceramic article, the main crystalline phase of which comprises lithium silicate and quartz crystalline phases, the composition of which, expressed in percentages by weight, comprises: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；Na₂O：0～5％；B₂O₃: 0 to 3 percent; a clarifying agent: 0 to 2% of (SiO)₂+Li₂O)/Al₂O₃6 to 15.

(4) A transparent glass-ceramic article having a main crystal phase comprising a crystal phase of lithium silicate and a crystal phase of quartz, a crystallinity of 50% or more, and a composition comprising, in weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％。

(5) The transparent glass-ceramic product has an average light transmittance of 80% or more at a wavelength of 400 to 800nm at a thickness of 1mm, and comprises, in terms of weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％。

(6) The transparent glass-ceramic product according to any one of (3) to (5), which has a composition comprising, in terms of weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；Na₂O：0～5％。

(7) The transparent glass-ceramic product according to any one of (1) to (6), which has a composition comprising, in terms of weight percent: SrO: 0 to 5 percent; and/or BaO: 0 to 5 percent; and/or TiO₂: 0 to 5 percent; and/or Y₂O₃: 0 to 5 percent; and/or B₂O₃: 0 to 3 percent; and/or a clarifying agent: 0 to 2 percent.

(8) Transparent glass-ceramic article having a composition expressed in weight percentage by SiO₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；Na₂O：0～5％；B₂O₃: 0 to 3 percent; a clarifying agent: 0-2% of the composition.

(9) The transparent glass-ceramic article according to any one of (1) to (8), wherein: (SiO)₂+Li₂O)/Al₂O₃6 to 15; and/or (Al)₂O₃+Li₂O)/P₂O₅5 to 20; and/or (SiO)₂+Li₂O)/P₂O₅40 to 80; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90; and/or (K)₂O+MgO)/ZrO₂0.6 to 1.2; and/or Li₂O/(K₂O+ZrO₂) 2.3 to 4.0.

(10) The transparent glass-ceramic product according to any one of (1) to (9), which has a composition comprising, in terms of weight percent: SiO 2₂: 70-80%; and/or Al₂O₃: 4-12%; and/or Li₂O: 7-15%; and/or ZrO₂: 0.5-6%; and/or P₂O₅: 0.5-5%; and/or K₂O: 0 to 5 percent; and/or MgO: 0 to 5 percent; and/or ZnO: 0 to 5 percent; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 3 percent; and/or B₂O₃: 0.1-2%; and/or a clarifying agent: 0 to 1 percent.

(11) The transparent glass-ceramic article according to any one of (1) to (10), wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 13; and/or (Al)₂O₃+Li₂O)/P₂O₅6 to 14; and/or (SiO)₂+Li₂O)/P₂O₅40 to 70; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85; and/or (K)₂O+MgO)/ZrO₂0.7 to 1.1; and/or Li₂O/(K₂O+ZrO₂) 2.5 to 3.5.

(12) The transparent glass-ceramic product according to any one of (1) to (11), which has a composition comprising, in terms of weight percent: SiO 2₂: 70-76%; and/or Al₂O₃: 4-10%; and/or Li₂O: 8-12.5%; and/or ZrO₂: 1-5%; and/or P₂O₅: 1-2%; and/or K₂O: 0 to 3 percent; and/or MgO: 0.3-2%; and/or ZnO: 0 to 3 percent; and/or Na₂O: 0 to 1 percent; and/or Sb₂O₃: 0 to 1 percent; and/or SnO₂: 0 to 1 percent; and/or SnO: 0 to 1 percent; and/or CeO₂：0～1％。

(13) The transparent glass-ceramic article according to any one of (1) to (12), wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 12.5; and/or (Al)₂O₃+Li₂O)/P₂O₅8 to 14; and/or (SiO)₂+Li₂O)/P₂O₅42 to 60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅46 to 80; and/or (K)₂O+MgO)/ZrO₂0.8 to 1.0; and/or Li₂O/(K₂O+ZrO₂) 2.8 to 3.3.

(14) The transparent glass-ceramic product according to any one of (1) to (13), which has a composition comprising, in terms of weight percent: li₂O: 8 to less than 10 percent; and/or does not contain SrO; and/or no BaO; and/or does not contain TiO₂(ii) a And/or does not contain Y₂O₃(ii) a And/or does not contain GeO₂(ii) a And/or does not contain CaO; and/or does not contain Cs₂O; and/or does not contain PbO; and/or do not contain B₂O₃(ii) a And/or does not contain As₂O₃(ii) a And/or do not contain La₂O₃(ii) a And/or does not contain Tb₂O₃。

(15) The method according to any one of (1) to (14)The transparent glass-ceramic article of (1), wherein: (Al)₂O₃+Li₂O)/P₂O₅8.5 to 14; and/or (SiO)₂+Li₂O)/P₂O₅45-60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅Is 48 to 80; and/or (SiO)₂+Li₂O)/Al₂O₃8.5 to 12.

(16) The transparent glass-ceramic article according to any one of (1) to (15), wherein the main crystal phases contain lithium disilicate and a quartz crystal phase and/or petalite.

(17) The transparent crystallized glass product according to any one of (1) to (16), wherein the crystallinity is 50% or more, preferably 65% or more, more preferably 70% or more, and still more preferably 75% or more.

(18) The transparent glass-ceramic product according to any one of (1) to (17), wherein the surface stress is 200MPa or more, preferably 250MPa or more, and more preferably 300MPa or more.

(19) The transparent glass-ceramic product according to any one of (1) to (18), wherein the depth of the ion exchange layer is 30 μm or more, preferably 50 μm or more, more preferably 60 μm or more, and still more preferably 80 μm or more.

(20) The transparent glass-ceramic product according to any one of (1) to (19), wherein the falling ball test height is 700mm or more, preferably 800mm or more, more preferably 1000mm or more, and still more preferably 1200mm or more.

(21) The transparent glass-ceramic product according to any one of (1) to (20), which has a fracture toughness of 1MPa m^1/2Above, preferably 1.3MPa · m^1/2More preferably 1.5MPa · m or more^1/2The above.

(22) The transparent glass-ceramic product according to any one of (1) to (21), wherein the four-point bending strength is 600MPa or more, preferably 650MPa or more, and more preferably 700MPa or more.

(23) The transparent glass-ceramic article according to any one of (1) to (22), which has a haze of 0.6% or less, preferably 0.5% or less, and more preferably 0.4% or less, at a thickness of 0.55 mm.

(24) The transparent crystallized glass product according to any one of (1) to (23), wherein the crystal grain size is 100nm or less, preferably 80nm or less, more preferably 60nm or less, still more preferably 50nm or less, and still more preferably 40nm or less.

(25) The transparent glass-ceramic product according to any one of (1) to (24), which has a temperature coefficient of refractive index of-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Below/° c.

(26) The transparent glass-ceramic product according to any one of (1) to (25), which has an average light transmittance of 400 to 800nm at a thickness of 1mm of 80% or more, preferably 85% or more, and more preferably 88% or more.

(27) The transparent glass-ceramic product according to any one of (1) to (26), which has a 0.55mm thickness and a light transmittance at a wavelength of 550nm of 80% or more, preferably 85% or more, more preferably 88% or more, and still more preferably 91% or more.

The present invention also provides a transparent glass ceramics having excellent light transmittance.

The technical scheme adopted by the invention for solving the technical problem is as follows:

(28) transparent glass ceramics, the main crystalline phase of which contains lithium silicate and quartz crystalline phases, the composition of which, expressed in percentages by weight, contains: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O: 0 to 10 percent; MgO: 0 to 10 percent; ZnO: 0 to 10% of (SiO)₂+Li₂O)/Al₂O₃6 to 15.

(29) Transparent glass ceramics, the composition of which is expressed by weight percentage and comprises: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％。

(30) Transparent glass ceramics containing SiO₂、Al₂O₃And Li₂O as an essential component, saidThe crystal grain size of the bright microcrystalline glass is less than 100 nm.

(31) A transparent glass-ceramic, the main crystalline phase of which contains lithium silicate and quartz crystalline phases, the crystallinity of which is more than 50%, and the composition of which, expressed in weight percentage, contains: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％。

(32) Transparent glass ceramics, having a haze of 0.6% or less at a thickness of 0.55mm, and having a composition, expressed in weight percent, comprising: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％。

(33) The transparent glass-ceramic according to any one of (30) to (32), which has a composition comprising, in terms of weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％。

(34) The transparent glass-ceramic according to any one of (28) to (33), which further comprises, in terms of composition by weight: SrO: 0 to 5 percent; and/or BaO: 0 to 5 percent; and/or TiO₂: 0 to 5 percent; and/or Y₂O₃: 0 to 5 percent; and/or Na₂O: 0 to 3 percent; and/or B₂O₃: 0 to 3 percent; and/or a clarifying agent: 0 to 2 percent.

(35) The transparent glass-ceramic according to any one of (28) to (34), wherein: (SiO)₂+Li₂O)/Al₂O₃6 to 15; and/or (Al)₂O₃+Li₂O)/P₂O₅5 to 20; and/or (SiO)₂+Li₂O)/P₂O₅40 to 80; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90; and/or (K)₂O+MgO)/ZrO₂0.6 to 1.2; and/or Li₂O/(K₂O+ZrO₂) 2.3 to 4.0.

(36) Root of herbaceous plantThe transparent glass-ceramic according to any one of (28) to (35), which has a composition comprising, in terms of weight percent: SiO 2₂: 70-80%; and/or Al₂O₃: 4-12%; and/or Li₂O: 7-15%; and/or ZrO₂: 0.5-6%; and/or P₂O₅: 0.5-5%; and/or K₂O: 0 to 5 percent; and/or MgO: 0 to 5 percent; and/or ZnO: 0 to 5 percent; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or B₂O₃: 0.1-2%; and/or a clarifying agent: 0 to 1 percent.

(37) The transparent glass-ceramic according to any one of (28) to (36), wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 13; and/or (Al)₂O₃+Li₂O)/P₂O₅6 to 14; and/or (SiO)₂+Li₂O)/P₂O₅40 to 70; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85; and/or (K)₂O+MgO)/ZrO₂0.7 to 1.1; and/or Li₂O/(K₂O+ZrO₂) 2.5 to 3.5.

(38) The transparent glass-ceramic according to any one of (28) to (37), which has a composition comprising, in terms of weight percent: SiO 2₂: 70-76%; and/or Al₂O₃: 4-10%; and/or Li₂O: 8-12.5%; and/or ZrO₂: 1-5%; and/or P₂O₅: 1-2%; and/or K₂O: 0 to 3 percent; and/or MgO: 0.3-2%; and/or ZnO: 0 to 3 percent; and/or Sb₂O₃: 0 to 1 percent; and/or SnO₂: 0 to 1 percent; and/or SnO: 0 to 1 percent; and/or CeO₂：0～1％。

(39) The transparent glass-ceramic according to any one of (28) to (38), wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 12.5; and/or (Al)₂O₃+Li₂O)/P₂O₅8 to 14; and/or (SiO)₂+Li₂O)/P₂O₅42 to 60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅46 to 80; and/or (K)₂O+MgO)/ZrO₂0.8 to 1.0; and/or Li₂O/(K₂O+ZrO₂) 2.8 to 3.3.

(40) The transparent glass-ceramic according to any one of (28) to (39), which has a composition comprising, in terms of weight percent: li₂O: 9 to less than 10 percent; does not contain SrO; and/or no BaO; and/or does not contain TiO₂(ii) a And/or does not contain Y₂O₃(ii) a And/or does not contain GeO₂(ii) a And/or does not contain CaO; and/or does not contain Cs₂O; and/or does not contain PbO; and/or does not contain As₂O₃(ii) a And/or do not contain La₂O₃(ii) a And/or does not contain Tb₂O₃(ii) a And/or does not contain Na₂O; and/or do not contain B₂O₃。

(41) The transparent glass-ceramic according to any one of (28) to (40), wherein: (Al)₂O₃+Li₂O)/P₂O₅8.5 to 14; and/or (SiO)₂+Li₂O)/P₂O₅45-60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅Is 48 to 80; and/or (SiO)₂+Li₂O)/Al₂O₃8.5 to 12.

(42) The transparent glass-ceramic according to any one of (28) to (41), wherein the main crystal phases contain lithium disilicate and a quartz crystal phase and/or petalite.

(43) The transparent glass-ceramic according to any one of (28) to (42), wherein the degree of crystallinity is 50% or more, preferably 65% or more, more preferably 70% or more, and still more preferably 75% or more.

(44) The transparent glass ceramics according to any one of (28) to (43), which has a haze of 0.6% or less, preferably 0.5% or less, more preferably 0.4% or less at a thickness of 0.55 mm.

(45) The transparent glass-ceramic according to any one of (28) to (44), wherein the crystal grain size is 100nm or less, preferably 80nm or less, more preferably 60nm or less, still more preferably 50nm or less, and yet more preferably 40nm or less.

(46) The transparent glass-ceramic according to any one of (28) to (45), which has a temperature coefficient of refractive index of-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Below/° c.

(47) The transparent glass-ceramic according to any one of (28) to (45), which has an average light transmittance at a wavelength of 400 to 800nm at a thickness of 1mm of 80% or more, preferably 85% or more, and more preferably 88% or more.

(48) The transparent glass-ceramic according to any one of (28) to (47), which has a light transmittance at a wavelength of 550nm at a thickness of 0.55mm of 80% or more, preferably 85% or more, more preferably 88% or more, and still more preferably 91% or more.

(49) The transparent glass-ceramic according to any one of (28) to (48), which has a refractive index (nd) of 1.520 to 1.550, preferably 1.530 to 1.545.

The invention also provides a glass composition.

(50) glass composition consisting of, in percentages by weight: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％。

(51) Glass composition of SiO₂、Al₂O₃、Li₂O is an essential component, has a refractive index (nd) of 1.500 to 1.530 and a coefficient of thermal expansion (alpha)_20℃-120℃) Is 45 x 10^-7/K～70×10^-7/K。

(52) The glass composition according to (51), which has a composition comprising, in weight percent: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％。

(53) The glass composition according to any one of (50) to (52), which has a composition comprising, in terms of weight percent: SrO: 0 to 5 percent; BaO: 0 to 5 percent; TiO 2₂：0～5％；Y₂O₃：0～5％；B₂O₃：0～3％；Na₂O: 0 to 3 percent; a clarifying agent: 0 to 2 percent.

(54) Glass composition consisting of, expressed in weight percent, SiO₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；B₂O₃：0～3％；Na₂O: 0 to 3 percent; a clarifying agent: 0-2% of the composition.

(55) The glass composition according to any one of (50) to (54), which has a composition comprising, in terms of weight percent: SiO 2₂: 70-80%, preferably 70-76%; and/or Al₂O₃: 4-12%, preferably 4-10%; and/or Li₂O: 7-15%, preferably 8-12.5; and/or ZrO₂: 0.5-6%, preferably 1-5%; and/or P₂O₅: 0.5 to 5%, preferably 1 to 2%; and/or K₂O: 0 to 5%, preferably 0 to 3%; and/or MgO: 0 to 5%, preferably 0.5 to 2%; and/or ZnO: 0 to 5%, preferably 0 to 3%; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or a clarifying agent: 0 to 1 percent.

(56) The glass composition according to any one of (50) to (55), wherein the content of each component satisfies one or more of the following 6 cases:

1)(SiO₂+Li₂O)/Al₂O₃is 6 to 15, preferably 8 to E13, more preferably 8 to 12.5, and still more preferably 8.5 to 12;

2)(Al₂O₃+Li₂O)/P₂O₅5 to 20, preferably 6 to 14, more preferably 8 to 14, and further preferably 8.5 to 14;

3)(SiO₂+Li₂O)/P₂O₅40 to 80, preferably 40 to 70, more preferably 42 to 60, and further preferably 45 to 60;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90, preferably 45 to 85, more preferably 46 to 80, and further preferably 48 to 80;

5)(K₂O+MgO)/ZrO₂0.6 to 1.2, preferably 0.7 to 1.1, and more preferably 0.8 to 1.0;

6)Li₂O/(K₂O+ZrO₂) 2.3 to 4.0, preferably 2.5 to 3.5, and more preferably 2.8 to 3.3.

(57) The glass composition according to any one of (50) to (56), which has a composition comprising, in terms of weight percent: li₂O: 8 to less than 10 percent; does not contain SrO; and/or no BaO; and/or does not contain TiO₂(ii) a And/or does not contain Y₂O₃(ii) a And/or does not contain GeO₂(ii) a And/or does not contain CaO; and/or does not contain Cs₂O; and/or does not contain PbO; and/or does not contain As₂O₃(ii) a And/or do not contain La₂O₃(ii) a And/or does not contain Tb₂O₃(ii) a And/or does not contain Na₂O; and/or do not contain B₂O₃。

(58) The glass composition according to any one of (50) to (57), which has a coefficient of thermal expansion (. alpha.) of_20℃-120℃) Is 45 x 10^-7/K～70×10^-7Preferably 50X 10,/K^-7/K～70×10^-7/K。

(59) The glass composition according to any one of (50) to (58), wherein the refractive index (nd) is 1.500 to 1.530, preferably 1.510 to 1.525.

The invention also provides a glass cover plate:

(60) a glass cover plate comprising the transparent glass-ceramic product according to any one of (1) to (27) and/or the transparent glass-ceramic according to any one of (28) to (49).

The invention also provides a glass component:

(61) a glass component comprising the transparent glass-ceramic product according to any one of (1) to (27), the transparent glass-ceramic according to any one of (28) to (49), and/or the glass composition according to any one of (50) to (59).

The present invention also provides a display device:

(62) a display device comprising the transparent glass-ceramic article according to any one of (1) to (27), and/or the transparent glass-ceramic according to any one of (28) to (49), and/or the glass composition according to any one of (50) to (59), and/or the glass cover plate according to (60).

The invention also provides an electronic device:

(63) an electronic device comprising the transparent glass-ceramic article according to any one of (1) to (27), and/or the transparent glass-ceramic according to any one of (28) to (49), and/or the glass composition according to any one of (50) to (59), and/or the glass cover plate according to (60), and/or the glass component according to (61).

The invention also provides a preparation method of the transparent glass-ceramic product.

(64) a method for making a transparent glass-ceramic article, the method comprising the steps of:

forming a glass composition having a composition, expressed in weight percent, comprising: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；B₂O₃：0～3％；Na₂O: 0 to 3 percent; a clarifying agent: 0 to 2 percent.

And then, forming a transparent glass-ceramic product by the transparent glass-ceramic through a chemical toughening process, wherein the transparent glass-ceramic has a light transmittance of more than 85% at a wavelength of 550nm and a thickness of 0.55 mm.

(65) The method for producing a transparent glass-ceramic article according to (64), wherein the glass composition comprises, in terms of weight percent: SiO 2₂: 70-80%, preferably 70-76%; and/or Al₂O₃: 4-12%, preferably 4-10%; and/or Li₂O: 7-15%, preferably 8-12.5; and/or ZrO₂: 0.5-6%, preferably 1-5%; and/or P₂O₅: 0.5 to 5%, preferably 1 to 2%; and/or K₂O: 0 to 5%, preferably 0 to 3%; and/or MgO: 0 to 5%, preferably 0.5 to 2%; and/or ZnO: 0 to 5%, preferably 0 to 3%; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or a clarifying agent: 0 to 1 percent.

(66) The method for preparing a transparent glass-ceramic article according to any one of (64) or (65), wherein the content of each component of the glass composition satisfies one or more of the following 6 conditions:

1)(SiO₂+Li₂O)/Al₂O₃6 to 15, preferably 8 to 13, more preferably 8 to 12.5, and further preferably 8.5 to 12;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90, preferably 45 to 85, more preferably 46 to 80, further preferablyPreferably 48 to 80;

(67) The method for producing a transparent glass-ceramic article according to any one of (64) to (66), wherein the crystallization process comprises the steps of: the temperature is raised to a predetermined crystallization treatment temperature, and after reaching the heat treatment temperature, the temperature is maintained for a certain period of time, and then the temperature is lowered. The temperature of the crystallization treatment is preferably 490 to 800 ℃, more preferably 550 to 750 ℃, and the holding time at the temperature of the crystallization treatment is preferably 0 to 8 hours, more preferably 1 to 6 hours.

(68) The method for producing a transparent glass-ceramic article according to any one of (64) to (66), wherein the crystallization process comprises the steps of: the treatment of the nucleation process is performed at the 1 st temperature, and then the treatment of the crystal growth process is performed at the 2 nd temperature higher than the nucleation process temperature.

(69) The method for preparing a transparent glass-ceramic article according to (68), wherein the crystallization process comprises the following steps: the temperature of the No. 1 is 490-650 ℃, and the temperature of the No. 2 is 600-850 ℃. The holding time at the 1 st temperature is 0 to 24 hours, preferably 2 to 15 hours. The holding time at the 2 nd temperature is 0 to 10 hours, preferably 0.5 to 6 hours.

(70) The method for preparing a transparent glass-ceramic product according to any one of (64) to (69), wherein the chemical toughening process comprises the following steps: immersing the transparent glass ceramics in a salt bath of molten Na salt at the temperature of 430-470 ℃ for about 6-20 hours, preferably at the temperature of 435-460 ℃ for 8-13 hours; and/or immersing the transparent glass ceramics in a salt bath of molten K salt at the temperature of 400-450 ℃ for 1-8 hours, wherein the preferable time range is 2-4 hours.

(71) According to the method for producing a transparent glass-ceramic article of any one of (64) to (69), the ion-exchange layer depth of the transparent glass-ceramic article is 80 μm or more, preferably 85 μm or more, by chemically tempering the article in a bath of a molten Na salt at 450 ℃ for 8 hours.

(72) The method of producing a transparent crystallized glass article according to any one of (64) to (71), which transparent crystallized glass article contains lithium disilicate and a quartz crystal phase and/or petalite as main crystal phases.

(73) The method for producing a transparent crystallized glass product according to any one of (64) to (72), wherein the crystallinity of the transparent crystallized glass product is 50% or more, preferably 65% or more, more preferably 70% or more, and still more preferably 75% or more.

(74) The method for producing a transparent crystallized glass product according to any one of (64) to (73), wherein the surface stress of the transparent crystallized glass product is 200MPa or more, preferably 250MPa or more, and more preferably 300MPa or more.

(75) The method for producing a transparent glass-ceramic product according to any one of (64) to (74), wherein the transparent glass-ceramic product has an ion-exchange layer depth of 30 μm or more, preferably 50 μm or more, more preferably 60 μm or more, and still more preferably 80 μm or more.

(76) The method for producing a transparent glass-ceramic product according to any one of (64) to (75), wherein the transparent glass-ceramic product has a ball drop test height of 700mm or more, preferably 800mm or more, more preferably 1000mm or more, and still more preferably 1200mm or more.

(77) The method for producing a transparent glass-ceramic article according to any one of (64) to (76), wherein the transparent glass-ceramic article has a fracture toughness of 1 MPa-m^1/2Above, preferably 1.3MPa · m^1/2More preferably 1.5MPa · m or more^1/2The above.

(78) The method for producing a transparent crystallized glass product according to any one of (64) to (77), wherein the transparent crystallized glass product has a four-point bending strength of 600MPa or more, preferably 650MPa or more, and more preferably 700MPa or more.

(79) The method for producing a transparent crystallized glass product according to any one of (64) to (78), wherein the transparent crystallized glass product has a haze of 0.6% or less, preferably 0.5% or less, and more preferably 0.4% or less at a thickness of 0.55 mm.

(80) The method for producing a transparent crystallized glass product according to any one of (64) to (79), wherein the crystal grain size of the transparent crystallized glass product is 100nm or less, preferably 80nm or less, more preferably 60nm or less, still more preferably 50nm or less, and yet more preferably 40nm or less.

(81) The method for producing a transparent glass-ceramic article according to any one of (64) to (80), wherein the temperature coefficient of refractive index of the transparent glass-ceramic article is-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Below/° c.

(82) The method for producing a transparent glass-ceramic product according to any one of (64) to (81), wherein the transparent glass-ceramic product has an average light transmittance of 80% or more, preferably 85% or more, and more preferably 88% or more at a thickness of 1mm and a wavelength of 400 to 800 nm.

(83) The method for producing a transparent glass-ceramic product according to any one of (64) to (82), wherein the transparent glass-ceramic product has a light transmittance at a wavelength of 550nm at a thickness of 0.55mm of 80% or more, preferably 85% or more, more preferably 88% or more, and still more preferably 91% or more.

The invention also provides a preparation method of the transparent microcrystalline glass.

(84) the preparation method of the transparent glass ceramics comprises the following steps:

And carrying out crystallization process on the glass composition to form transparent glass ceramics, wherein the main crystal phase of the transparent glass ceramics contains lithium silicate and quartz crystal phase, and the light transmittance of the transparent glass ceramics with the thickness of 0.55mm and the wavelength of 550nm is more than 85%.

(85) The method for producing a transparent glass-ceramic according to (84), wherein the glass composition comprises, in terms of weight percent: SiO 2₂: 70-80%, preferably 70-76%; and/or Al₂O₃: 4-12%, preferably 4-10%; and/or Li₂O: 7-15%, preferably 8-12.5; and/or ZrO₂: 0.5-6%, preferably 1-5%; and/or P₂O₅: 0.5 to 5%, preferably 1 to 2%; and/or K₂O: 0 to 5%, preferably 0 to 3%; and/or MgO: 0 to 5%, preferably 0.5 to 2%; and/or ZnO: 0 to 5%, preferably 0 to 3%; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or a clarifying agent: 0 to 1 percent.

(86) The method for preparing transparent glass-ceramic according to any one of (84) or (85), wherein the content of each component of the glass composition satisfies one or more of the following 6 conditions:

(87) The method for producing a transparent glass-ceramic according to any one of (84) to (86), wherein the crystallization process comprises the steps of: the temperature is raised to a predetermined crystallization treatment temperature, and after reaching the heat treatment temperature, the temperature is maintained for a certain period of time, and then the temperature is lowered. The temperature of the crystallization treatment is preferably 490 to 800 ℃, more preferably 550 to 750 ℃, and the holding time at the temperature of the crystallization treatment is preferably 0 to 8 hours, more preferably 1 to 6 hours.

(88) The method for producing a transparent glass-ceramic according to any one of (84) to (86), wherein the crystallization process comprises the steps of: the treatment of the nucleation process is performed at the 1 st temperature, and then the treatment of the crystal growth process is performed at the 2 nd temperature higher than the nucleation process temperature.

(89) The method for preparing transparent glass-ceramic according to (88), wherein the crystallization process comprises the following steps: the temperature of the No. 1 is 490-650 ℃, and the temperature of the No. 2 is 600-850 ℃. The holding time at the 1 st temperature is 0 to 24 hours, preferably 2 to 15 hours. The holding time at the 2 nd temperature is 0 to 10 hours, preferably 0.5 to 6 hours.

(90) The method for producing a transparent glass-ceramic according to any one of (84) to (89), wherein the transparent glass-ceramic contains lithium disilicate and a quartz crystal phase and/or petalite as a main crystal phase.

(91) According to the method for producing a transparent glass-ceramic of any one of (84) to (90), the crystallinity of the transparent glass-ceramic is 50% or more, preferably 65% or more, more preferably 70% or more, and still more preferably 75% or more.

(92) According to the method for producing a transparent crystallized glass of any one of (84) to (91), the transparent crystallized glass has a haze of 0.6% or less, preferably 0.5% or less, and more preferably 0.4% or less at a thickness of 0.55 mm.

(93) According to the method of producing a transparent glass ceramics according to any one of (84) to (92), the crystal grain size of the transparent glass ceramics is 100nm or less, preferably 80nm or less, more preferably 60nm or less, still more preferably 50nm or less, and still more preferably 40nm or less.

(94) The method for producing a transparent glass-ceramic according to any one of (84) to (93), wherein the temperature coefficient of refractive index of the transparent glass-ceramic is-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Below/° c.

(95) The method for producing a transparent glass-ceramic according to any one of (84) to (94), wherein the transparent glass-ceramic has an average light transmittance of 80% or more, preferably 85% or more, and more preferably 88% or more at a wavelength of 400 to 800nm at a thickness of 1 mm.

(96) The method for producing a transparent glass-ceramic according to any one of (84) to (95), wherein the transparent glass-ceramic has a light transmittance at a wavelength of 550nm at a thickness of 0.55mm of 80% or more, preferably 85% or more, more preferably 88% or more, and still more preferably 91% or more.

The invention has the beneficial effects that: through reasonable component design, the transparent glass ceramics and the transparent glass ceramics product have excellent light transmittance and are suitable for electronic equipment or display equipment.

Drawings

FIG. 1X-ray diffraction Pattern (XRD) of crystalline phase of example 2 of transparent glass-ceramic article

Detailed Description

In the following text, the transparent glass ceramics are referred to simply as "glass ceramics" and the transparent glass ceramics are referred to simply as "glass ceramics".

The crystallized glass and the crystallized glass article of the present invention are materials having a crystal phase and a glass phase, which are different from amorphous solids. The crystalline phases of the glass-ceramic and the glass-ceramic article can be distinguished by the angle of the peak appearing in the X-ray diffraction pattern of the X-ray diffraction analysis and by TEMEDX, the predominant crystalline phase being determined by X-ray diffraction.

The inventors of the present invention have made extensive experiments and studies, and have obtained a crystallized glass or a crystallized glass product of the present invention at a low cost by specifying the content and content ratio of specific components constituting a crystallized glass or a crystallized glass product to specific values and precipitating specific crystal phases.

The compositional ranges of the respective components of the glass composition, the glass ceramics or the glass ceramics product of the present invention will be explained below. In the present specification, the contents of the respective components are all expressed in terms of weight percentage with respect to the total amount of glass matter converted into the composition of oxides, if not specifically stated. Here, the "composition in terms of oxide" means that when oxides, complex salts, hydroxides, and the like used as raw materials of the glass composition, the crystallized glass, or the crystallized glass product composition of the present invention are decomposed at melting and converted into oxides, the total amount of the oxides is 100%. In the present specification, the term "glass" refers to a glass composition before crystallization, a glass composition after crystallization is referred to as "glass ceramics", and a glass ceramic product refers to glass ceramics after chemical tempering.

Unless otherwise indicated in a specific context, numerical ranges set forth herein include upper and lower values, and "above" and "below" include endpoints, all integers and fractions within the range, and are not limited to the specific values listed in the defined range. The term "about" as used herein means that the formulations, parameters, and other quantities and characteristics are not, and need not be, exact, and can be approximate and/or larger or smaller, if desired, reflecting tolerances, conversion factors, measurement error and the like. As used herein, "and/or" is inclusive, e.g., "A and/or B," and means A alone, B alone, or both A and B.

The glasses, devitrified glasses and devitrified glass articles of the present invention can be broadly described as lithium-containing aluminosilicate glasses, devitrified glasses and devitrified glass articles comprising SiO₂、Al₂O₃And Li₂O, in addition to, ZrO₂、P₂O₅And the like. In some embodiments, depending on the composition of the glass, the first predominant crystalline phase of the microcrystalline glass and the microcrystalline glass article is lithium silicate; in some embodiments, the first predominant crystalline phase is petalite; in some embodiments, the first predominant crystalline phase is a quartz crystalline phase (including quartz, and mixtures thereof)And quartz solid solution). In some embodiments, the primary crystalline phases include lithium silicate and quartz crystalline phases. In some embodiments, the predominant crystalline phases include lithium silicate and petalite. In some embodiments, the first crystalline phase is lithium silicate and the second predominant crystalline phase is a quartz crystalline phase; in some embodiments, the first crystalline phase is a quartz crystalline phase and the second predominant crystalline phase is lithium silicate; in some embodiments, the first crystalline phase is lithium silicate and the second predominant crystalline phase is petalite; in some embodiments, the first crystalline phase is petalite and the second predominant crystalline phase is lithium silicate. In some embodiments, the predominant crystalline phases include lithium silicate, petalite, and quartz crystalline phases; in some embodiments, the first crystalline phase is lithium silicate, the second predominant crystalline phase is petalite, and the third predominant crystalline phase is a quartz crystalline phase; in some embodiments, the first crystalline phase is lithium silicate, the second predominant crystalline phase is a quartz crystalline phase, and the third predominant crystalline phase is petalite; in some embodiments, the first predominant crystalline phase is petalite, the second predominant crystalline phase is lithium silicate, and the third predominant crystalline phase is a quartz crystalline phase; in some embodiments, the first crystalline phase is a quartz crystalline phase, the second predominant crystalline phase is lithium silicate, and the third predominant crystalline phase is petalite. In some embodiments, the quartz crystal phase is an alpha-hexagonal quartz crystal phase; in some embodiments, the lithium silicate is lithium disilicate; beta-spodumene ss, lithium phosphate, etc. may also be present as secondary crystalline phases. It should be noted that the crystal phase of quartz referred to herein includes both the case of containing only quartz crystal, the case of containing quartz and a solid solution of quartz.

In some embodiments, the weight percentage of the residual glass phase in the glass ceramic and the glass ceramic product is 8-45%; in some embodiments, 10-40%; in some embodiments, 12-40%; in some embodiments, 15-40%; in some embodiments, 15 to 35%; in some embodiments, 15-32%; in some embodiments, 20 to 45%; in some embodiments, 20-40%; in some embodiments, 32-45%; in some embodiments, 32-40%; in some embodiments, 35 ~ 45%.

When the main crystal phase of the microcrystalline glass is one or the combination of quartz crystal phase, lithium silicate and petalite, the fracture toughness of the microcrystalline glass is high. When the main crystal phase of the microcrystalline glass is quartz crystal phase and lithium disilicate, the temperature coefficient of the refractive index of the microcrystalline glass is low, and the fracture toughness is high; the height of the microcrystalline glass product in the falling ball test is increased, and the four-point bending strength is increased.

The main crystal phase accounts for 50-92% of the weight of the microcrystalline glass or the microcrystalline glass product; in some embodiments, the weight percent is up to 60-90%; in some embodiments, the weight percent is 65-85%; in some embodiments, the weight percent is up to 70-80%; in some embodiments, the weight percentage is 80 to 92%. The primary crystalline phase, as referred to herein, refers to a crystalline phase having a higher weight percentage than other crystalline phases present in the microcrystalline glass or microcrystalline glass article.

In some embodiments, the weight percent of the crystalline quartz phase of the microcrystalline glass or microcrystalline glass article is less than 70%; in some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent quartz crystalline phase of less than 65%; in some embodiments, the weight percent of the crystalline quartz phase of the microcrystalline glass or microcrystalline glass article is less than 60%; in some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent quartz crystalline phase below 55%; in some embodiments, the weight percent of the crystalline quartz phase of the microcrystalline glass or microcrystalline glass article is less than 50%; in some embodiments, the weight percent of the crystalline quartz phase of the microcrystalline glass or microcrystalline glass article is less than 45%.

In some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent lithium silicate crystalline phase of less than 55%; in some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent lithium silicate crystalline phase below 50%; in some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent lithium silicate crystalline phase below 45%; in some embodiments, the microcrystalline glass or microcrystalline glass article has a weight percent lithium silicate crystalline phase of less than 40%.

In some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 40%; in some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 35%; in some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 30%; in some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 25%; in some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 20%; in some embodiments, the glass-ceramic or glass-ceramic article has a petalite crystalline phase weight percent of less than 15%.

SiO₂Is the basic component of the glass composition of the invention and is useful for stabilizing the network structure of glass and glass-ceramics, which is one of the components forming lithium silicate, quartz crystal phase and petalite after crystallization, if SiO₂The content of (A) is 65% or less, and since the formation of crystals in the glass ceramics is reduced and the crystals are easily coarsened, the haze of the glass ceramics and the properties such as the falling ball test height of the glass ceramics are affected, SiO₂The lower limit of the content is preferably 65%, preferably 70%; if SiO₂The content is more than 85 percent, the melting temperature of the glass is high, the melting is difficult, the forming is difficult, and the consistency of the glass is influenced, therefore, the SiO₂The upper limit of the content is preferably 85%, preferably 80%, and more preferably 76%. In some embodiments, about 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84% SiO may be included₂。

Al₂O₃Is a component for forming a glass network structure, which is an important component contributing to stabilization of glass molding and improvement of chemical stability, and also can improve mechanical properties of glass and increase the depth of an ion exchange layer and surface stress of a glass-ceramic product, but if the content thereof is less than 1%, the effect is not good, and therefore, Al is present₂O₃The lower limit of the content is 1%, preferably 4%. On the other hand, such asFruit Al₂O₃When the content of (b) exceeds 15%, the glass tends to have a low melting property and a low devitrification resistance, to have large crystals during crystallization, and to have a low strength of the glass ceramics and glass ceramics products, and therefore, Al is contained in the glass ceramics and glass ceramics products₂O₃The upper limit of the content is 15%, preferably 12%, more preferably 10%. In some embodiments, about 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15% Al may be included₂O₃。

Li₂O is an essential component which becomes a crystal phase composition by crystallization, contributes to formation of a lithium-containing crystal phase such as lithium silicate and petalite, and is also an essential component for chemical strengthening. However, if the content is less than 5%, the effect is not good, and therefore, Li₂The lower limit of the O content is 5%, preferably 7%, more preferably 8%, and in some embodiments, still more preferably 9%; on the other hand, if Li is contained excessively₂O is liable to lower the chemical stability of the glass and deteriorate the light transmittance of the glass-ceramic and the glass-ceramic product, and therefore Li₂The upper limit of the O content is preferably 15%, more preferably 12.5%, and in some embodiments, more preferably less than 10%. In some embodiments, about 5%, 6%, 7%, 8%, 9%, 9.8%, 10%, 11%, 12%, 13%, 14%, 15% Li may be included₂O。

The inventor of the invention has found that through controlling SiO₂、Li₂O and Al₂O₃Introduced in a certain proportion, can influence the thermal expansion coefficient of the glass, the haze and the grain size of the microcrystalline glass and the microcrystalline glass products, especially (SiO)₂+Li₂O)/Al₂O₃In the range of 6 to 15, the glass has a low thermal expansion coefficient, and after crystallization, small crystal grains are obtained, and the mechanical strength of the glass ceramics and glass ceramics products is improved, and in some embodiments, (SiO) is preferable₂+Li₂O)/Al₂O₃8 to 13, more preferably 8 to 12.5, and can obtain lower haze, so that the microcrystalline glass and the microcrystalline glass product have excellent light transmittance; further preferably (S)iO₂+Li₂O)/Al₂O₃The effect is especially obvious when the content is 8.5-12. In some embodiments, (SiO)₂+Li₂O)/Al₂O₃The value of (b) may be 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15.

P₂O₅Is an optional component which is helpful for improving the low-temperature melting property of the glass, can carry out phase separation in the glass to form crystal nucleus and improve the thermal expansion stability, P, of the glass in the crystallization process₂O₅The lower limit of the content is preferably 0.1, more preferably 0.5%, and further preferably 1%; but if it contains P excessively₂O₅The glass tends to have a reduced devitrification resistance and phase separation, and the mechanical properties of the glass tend to deteriorate. Thus, P₂O₅The upper limit of the content is 10%, preferably 5%, more preferably 2%. In some embodiments, about 0%, 0.1%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% P may be included₂O₅。

By controlling (SiO) in the present invention₂+Li₂O)/P₂O₅The value of (A) is in the range of 40 to 80, and the depth of an ion exchange layer of the microcrystalline glass product, especially (SiO)₂+Li₂O)/P₂O₅The value of (B) is in the range of 40 to 70, more preferably (SiO)₂+Li₂O)/P₂O₅The value of (b) is 42 to 60, preferably 45 to 60, and the microcrystalline glass product can obtain a deeper ion exchange layer; in some embodiments, the (SiO)₂+Li₂O)/P₂O₅The value of (B) is in the range of 40 to 70, more preferably (SiO)₂+Li₂O)/P₂O₅When the value of (A) is 42 to 60, more preferably 45 to 60, the crystallization process is advantageous for forming a quartz crystal phase and lithium disilicate, and the microcrystalline glass product can have an excellent temperature coefficient of refractive index which can be-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Lower than/° C, lowering the microcrystalline glassAnd the refractive index change difference between the glass phase and each crystal phase in the microcrystalline glass product caused by the temperature difference, thereby avoiding the decrease of the light transmittance of the microcrystalline glass or the microcrystalline glass product caused by the temperature difference. In some embodiments, (SiO)₂+Li₂O)/P₂O₅May be 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70.

Through a great deal of experimental research of the inventor, Al is found₂O₃、Li₂O and P₂O₅The proportion of the glass to be incorporated has a significant influence on the surface stress and the four-point bending strength of the glass-ceramic and glass-ceramic articles, in particular of (Al)₂O₃+Li₂O)/P₂O₅In the range of 5 to 20, the surface stress of the glass ceramics and the glass ceramics product can be increased, and (Al) is preferable₂O₃+Li₂O)/P₂O₅In the range of 6 to 14, (Al) is more preferable in some embodiments₂O₃+Li₂O)/P₂O₅Is 8 to 14, and (Al) is more preferable₂O₃+Li₂O)/P₂O₅8.5 to 14, and the four-point bending strength of the microcrystalline glass and the microcrystalline glass product is significantly improved, and in some embodiments, the four-point bending strength of the microcrystalline glass and the microcrystalline glass product is 600MPa or more, preferably 650MPa or more, and more preferably 700MPa or more. In some embodiments, (Al)₂O₃+Li₂O)/P₂O₅The value of (a) may be 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20.

ZrO₂Optional components having the function of forming crystal nuclei by crystallization and simultaneously contributing to the improvement of the chemical stability of the glass, and researches have found that ZrO₂Li can also be increased by significantly reducing glass devitrification and lowering liquidus temperature during formation₂O-Al₂O₃-SiO₂-P₂O₅Stability of the glass. ZrO in the invention₂The lower limit of the content is preferably 0.1, more preferably 0.5%, and further preferably 1%; but if it contains ZrO excessively₂The devitrification resistance of the glass is easily lowered and the difficulty of controlling the crystallization process of the glass is increased, so that ZrO₂The upper limit of the content is 10%, preferably 6%, more preferably 5%. In some embodiments, ZrO may be included at about 0%, 0.1%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%₂。

In the course of a large number of experimental studies, the inventors have found that SiO can be controlled by controlling the SiO₂、Al₂O₃、Li₂O and ZrO₂Total content of (2) and P₂O₅Ratio of introduced amounts (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅In the range of 40-90, the microcrystalline glass product can be subjected to falling ball impact of more than 700mm, preferably (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85; in some embodiments, among others, (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅In the range of 46 to 80, lithium disilicate and quartz crystal phase are easily formed, and the microcrystalline glass product easily obtains excellent fracture toughness which can be 1 MPa.m^1/2Above, preferably 1.3MPa · m¹ ^/2More preferably 1.5MPa · m or more^1/2The above; simultaneously, the bearing capacity of the falling ball test height is further optimized, and (SiO) is further optimized₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅48 to 80, and a ball drop test height of 700mm or more, preferably 800mm or more, more preferably 1000mm or more, and further preferably 1200mm or more. In some embodiments, (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅Can be 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57、58、59、60、61、62、63、64、65、66、67、68、69、70、71、72、73、74、75、76、77、78、79、80、81、82、83、84、85、86、87、88、89、90。

K₂O is an optional component for improving the low-temperature melting property and the formability of the glass, but if K is excessively contained, K is excessively contained₂O, a decrease in the chemical stability of the glass and an increase in the average linear expansion coefficient are easily caused. Thus, K₂The content of O is 0 to 10%, preferably 0 to 5%, more preferably 0 to 3%. In some embodiments, K may be included at about 0%, greater than 0%, 0.1%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%₂O。

In the present invention, when Li is controlled₂O and K₂O and ZrO₂Total content (K) of₂O+ZrO₂) Introduction amount ratio of Li₂O/(K₂O+ZrO₂) When the crystallization degree is within the range of 2.3-4.0, the crystallization performance of the microcrystalline glass can be optimized, and the microcrystalline glass product have proper crystallinity, so that the microcrystalline glass and the microcrystalline glass product have excellent performance; preferably Li₂O/(K₂O+ZrO₂) 2.5 to 3.5, more preferably 2.8 to 3.3, and the crystallized glass product have a large ball drop test height, and in some embodiments, the ball drop test height is preferably 800mm or more, more preferably 1000mm or more, and further preferably 1200mm or more. In some embodiments, Li₂O/(K₂O+ZrO₂) The value of (a) may be 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0.

The ZnO can improve the melting property of the glass, improve the chemical stability of the glass, refine crystal grains during crystallization, and suppress the deterioration of devitrification property by controlling the upper limit of the ZnO content to 10% or less, and therefore, the upper limit of the ZnO content is 10%, preferably 5%, more preferably 3%. In some embodiments, about 0%, greater than 0%, 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% ZnO may be included.

MgO contributes to lowering the viscosity of glass, inhibiting glass crystallization during molding and refining crystal grains during crystallization, and also has the effect of improving low-temperature melting property, and MgO is an optional component in the invention, and the preferable content is more than 0.3%; however, if the content of MgO is too high, devitrification resistance may be deteriorated, and undesirable crystals are obtained after crystallization, resulting in deterioration of the performance of the glass-ceramic product, and therefore, the upper limit of the content of MgO is 10%, preferably 5%, more preferably 2%. In some embodiments, MgO may be included at about 0%, greater than 0%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%.

Through a great deal of experimental research of the inventor, the inventor finds that when K is controlled₂Total content K of O and MgO₂O + MgO and ZrO₂Introduced amount ratio (K)₂O+MgO)/ZrO₂In the range of 0.6 to 1.2, it can be reacted with Li₂The O generates a synergistic effect to promote the microcrystalline glass and the microcrystalline glass product to have proper crystallinity, so that the microcrystalline glass and the microcrystalline glass product have excellent performance; it was also found that (K) is controlled by preference₂O+MgO)/ZrO₂0.7 to 1.1, and (K) is more preferable because crystal grains can be refined and the light transmittance and mechanical strength are more excellent₂O+MgO)/ZrO₂In the range of 0.8 to 1.0, the four-point bending strength of the crystallized glass and the crystallized glass product becomes large in some embodiments, and the four-point bending strength is preferably 650MPa or more, more preferably 700MPa or more. In some embodiments, (K)₂O+MgO)/ZrO₂Can be 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1, 1.15, 1.2.

SrO is an optional component for improving the low-temperature melting property of the glass and inhibiting the formation crystallization, and in the invention, the SrO is preferably controlled to be less than 5%, so that the microcrystalline glass and the microcrystalline glass product can easily obtain excellent grain size, the content of the SrO is preferably less than 1%, and in some embodiments, the SrO is preferably not introduced. In some embodiments, about 0%, greater than 0%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5% SrO may be included.

BaO is an optional ingredient contributing to improvement of glass forming property of the glass, and when the content thereof exceeds 5%, devitrification resistance of the glass is lowered, so that the BaO content is preferably controlled to 5% or less, more preferably 1% or less, and in some embodiments, is preferably not incorporated. In some embodiments, BaO may be included at about 0%, greater than 0%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5%.

TiO₂Is an optional component which helps to lower the melting temperature of the glass and improve chemical stability, and the incorporation of 5% or less in the present invention makes it easier to control the glass crystallization process, preferably 1% or less, and in some embodiments, preferably none. In some embodiments, about 0%, greater than 0%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5% TiO may be included₂。

Y₂O₃Is an optional component for improving the hardness and chemical stability of the glass, but if the content is too large, devitrification of the glass is likely to occur, and the content is 5% or less, preferably 1% or less, and in some embodiments, it is preferable not to incorporate the glass. In some embodiments, about 0%, greater than 0%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5% Y may be included₂O₃。

Na₂O is an optional component for improving the melting property of the glass, and if it is contained in a high content, it is likely to cause increase in the precipitated crystal phase or phase change in the precipitated crystal phase during crystallization, so that it is preferable that Na is contained in an amount of 5% or less in the glass ceramics product without impairing the performance of the glass ceramics and glass ceramics product of the present invention₂O, more preferably 3% or less of Na₂O, more preferably 1% or less of Na₂O; the glass or glass ceramics may preferably contain 3% or less of Na₂O, more preferably 1% or less of Na₂O, in some embodiments, preferably does not contain Na₂And O. In some embodiments, about 0%, greater than 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, (iii) may be included,3.0%, 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, 4.0%, 4.1%. 4.2%, 4.3%, 4.4%, 4.5%, 4.6%, 4.7%, 4.8%, 4.9%, 5.0% Na₂O。

B₂O₃It is useful to provide a glass having a low melting temperature, and when the content thereof is high, the chemical stability of the glass is lowered, so that B₂O₃The content is 3% or less, preferably 0.1 to 2% in some embodiments, and preferably B is not introduced in some embodiments₂O₃. In some embodiments, about 0%, greater than 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3.0% B may be included₂O₃。

Sb₂O₃、SnO₂、SnO、CeO₂One or more of Sb is added as a clarifying agent₂O₃The upper limit of the content is 2%, preferably 1%, more preferably 0.5%. SnO₂、SnO、CeO₂The upper limit of the content of each is 2%, preferably 1%, and more preferably 0.5%. In some embodiments, one or more of the above 4 fining agents are present in an amount of about 0%, greater than 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%.

In some embodiments, As may also be used₂O₃The content of each of the clarifying agents is 2% or less, preferably 1% or less, and more preferably 0.5% or less.

In order to obtain the proper grain size and crystalline phase type in the present invention, it is therefore preferred in some embodiments not to incorporate La₂O₃、Cs₂O、Tb₂O₃、GeO₂And CaO and the like; PbO and As₂O₃Are toxic substances and do not meet the environmental requirements even when added in small amounts, and therefore the present invention does not contain PbO and As in some embodiments₂O₃。

The term "not introduced", "not containing" or "0%" as used herein means that the compound, molecule, element or the like is not intentionally added as a raw material to the glass, glass ceramic or glass ceramic product of the present invention; it is within the scope of the present invention that certain impurities or components, which are not intentionally added, may be present as raw materials and/or equipment for the production of glass, glass-ceramic and glass-ceramic articles, and may be present in small or trace amounts in the final glass composition, glass-ceramic and glass-ceramic articles.

In some embodiments of the present invention, the predominant crystalline phases in the microcrystalline glass and microcrystalline glass articles comprise lithium silicate and the crystalline phase quartz, the lithium silicate being lithium disilicate (Li)₂Si₂O₅) And lithium metasilicate (Li)₂SiO₃) In some embodiments, it is preferred to use lithium disilicate and quartz crystal phase and/or petalite as the main crystal phases, in some embodiments, it is preferred to use lithium disilicate and quartz crystal phase as the main crystal phases, and in some preferred embodiments, it is preferred to use lithium disilicate and α -quartz crystal phase as the main crystal phases, thereby achieving superior performance in the present invention.

The microcrystalline glass of the present invention is provided with excellent mechanical properties, and at the same time, ion exchange can be performed to obtain additional mechanical strength. The invention can lead the microcrystalline glass and the microcrystalline glass product to obtain proper grain size through reasonable component design; meanwhile, the microcrystalline glass and the microcrystalline glass product have good crystallinity, so that the microcrystalline glass and the microcrystalline glass product have excellent mechanical properties. The crystallinity is the complete degree of crystallization, the arrangement of mass points in the complete crystal is regular, the diffraction line is strong, sharp and symmetrical, and the half-height width of a diffraction peak is close to the width measured by an instrument; the crystal with poor crystallinity has defects such as dislocation, and the diffraction line peak shape is wide and dispersed. The poorer the crystallinity, the weaker the diffraction power, the wider the diffraction peak until it disappears in the background.

The grain size and haze of the microcrystalline glass or microcrystalline glass article of the present invention affect the transparency of the microcrystalline glass or microcrystalline glass article, i.e., affect the light transmission, with smaller grains giving higher transparency and smaller haze giving higher transparency. In some embodiments, the haze is 0.6% or less, preferably 0.5% or less, more preferably 0.4% or less for a thickness of 0.55 mm. In some embodiments, the crystal grain size is 100nm or less, preferably 80nm or less, more preferably 60nm or less, further preferably 50nm or less, and still further preferably 40nm or less. On the other hand, it is found through research that the smaller the difference between the refractive indexes of the crystal phase and the glass phase in the microcrystalline glass, the higher the transparency of the microcrystalline glass or the microcrystalline glass product.

The crystallized glass or crystallized glass article of the present invention exhibits high transparency in the visible range (i.e., the crystallized glass or crystallized glass article is transparent). In some embodiments, the average light transmittance of 400 to 800nm at a thickness of 1mm is 80% or more, preferably 85% or more, and more preferably 88% or more. In some preferred embodiments, the 0.55mm thick 550nm light transmittance is 80% or more, preferably 85% or more, more preferably 88% or more, and still more preferably 91% or more.

In some embodiments, an antimicrobial component may be added to the glass, microcrystalline glass, or microcrystalline glass article.

The glass composition, the glass-ceramic and the glass-ceramic product of the invention can be produced and manufactured by the following methods:

forming a glass composition: the raw materials are uniformly mixed according to the composition proportion range, the uniform mixture is put into a crucible made of platinum or quartz, the melting is carried out for 5 to 24 hours in an electric furnace or a gas furnace within the temperature range of 1250 to 1650 ℃ according to the melting difficulty of the glass composition, the mixture is stirred to be uniform, then the temperature is reduced to a proper temperature and the mixture is cast into a mould, and the glass is slowly cooled to obtain the glass.

The glass composition of the present invention can be shaped by a well-known method. In some embodiments, the glass composition of the present invention has a refractive index (nd) of 1.500 to 1.530, preferably 1.510 to 1.525.

The glass composition of the present invention is crystallized by a crystallization process after molding or after molding processing, and crystals are uniformly precipitated in the glass. The crystallization may be performed in 1 stage or 2 stages, but the crystallization is preferably performed in 2 stages. The treatment of the nucleation process is performed at the 1 st temperature, and then the treatment of the crystal growth process is performed at the 2 nd temperature higher than the nucleation process temperature. The crystallization process performed at the 1 st temperature is referred to as a 1 st crystallization process, and the crystallization process performed at the 2 nd temperature is referred to as a 2 nd crystallization process.

In order to obtain desired physical properties of the glass-ceramic, the preferred crystallization process is:

the above-mentioned crystallization treatment is performed in 1 stage, and the nucleus formation process and the crystal growth process can be continuously performed. That is, the temperature is raised to a predetermined crystallization temperature, and after reaching the heat treatment temperature, the temperature is maintained for a certain period of time, and then the temperature is lowered. The temperature of the crystallization treatment is preferably 490 to 800 ℃, and the holding time at the crystallization treatment temperature is preferably 0 to 8 hours, and more preferably 1 to 6 hours, in order to precipitate a desired crystal phase, more preferably 550 to 750 ℃.

When the crystallization is performed in 2 stages, the 1 st temperature is preferably 490 to 650 ℃, and the 2 nd temperature is preferably 600 to 850 ℃. The holding time at the temperature of 1 st is preferably 0 to 24 hours, more preferably 2 to 15 hours. The holding time at the 2 nd temperature is preferably 0 to 10 hours, more preferably 0.5 to 6 hours.

The above-mentioned holding time of 0 hour means that the temperature is lowered or raised less than 1 minute after the temperature is reached.

In some embodiments, the microcrystalline glass obtained by the crystallization process has a refractive index (nd) of 1.520 to 1.550, preferably 1.530 to 1.545.

In some embodiments, the glass compositions or glass-ceramics described herein can be fabricated into shaped bodies including, but not limited to, sheets by various processes including, but not limited to, slot draw, float, roll, and other sheet forming processes known in the art. Alternatively, the glass composition or glass ceramic may be formed by a float or roll process as is well known in the art.

The glass composition or glass ceramics of the present invention can be used for producing a sheet glass shaped article by a method such as grinding or polishing, but the method for producing a glass shaped article is not limited to these methods.

The glass or glass-ceramic molded article of the present invention can be produced into various shapes at a certain temperature by a method such as hot bending or press molding, and is not limited to these methods.

The glass compositions, devitrified glasses, and devitrified glass articles of the present invention can have any thickness that is reasonably useful.

The crystallized glass of the present invention can be produced into a crystallized glass product by forming a compressive stress layer to obtain higher strength in addition to improving mechanical properties by precipitation crystallization.

In some embodiments, the glass composition or glass ceramic may be formed into a sheet and/or shaped (e.g., perforated, hot bent, etc.), shaped, polished and/or polished, and chemically tempered via a chemical tempering process.

The chemical toughening method is an ion exchange method. The glass and glass ceramics of the present invention can be ion-exchanged by a method known in the art. In the ion exchange process, smaller metal ions in the glass or glass-ceramic are replaced or "exchanged" by larger metal ions having the same valence state that are adjacent to the glass or glass-ceramic. And replacing smaller ions with larger ions to build a compressive stress in the glass or the glass ceramics to form a compressive stress layer.

In some embodiments, the metal ion is a monovalent alkali metal ion (e.g., Na)⁺、K⁺、Rb⁺、Cs⁺Etc.), ion exchange is performed by immersing the glass or glass-ceramic in a salt bath of at least one molten salt containing larger metal ions for replacing the smaller metal ions in the glass. Alternatively, other monovalent metal ions such as Ag⁺、Tl⁺、Cu⁺Etc. may also be used to exchange monovalent ions. One or more ion exchange processes used to chemically temper glass or glass ceramics may include, but are not limited to: it is immersed in a single salt bath or in a plurality of salt baths of the same or different composition with washing and/or annealing steps between the immersions.

In some embodiments, the glass or glass-ceramic may be formed by melting a Na salt (e.g., NaNO) by immersion at a temperature of about 430 ℃ to 470 ℃₃) The salt bath is subjected to ion exchange for about 6 to 20 hours, preferably at a temperature of between 435 and 460 ℃ for 8 to 13 hours. In this embodiment, Na ions replace part of Li ions in the glass or glass ceramics, thereby forming a surface compression layer and exhibiting high mechanical properties. In some embodiments, the glass or glass-ceramic may be formed by melting a K salt (e.g., KNO) by immersion at a temperature that allows immersion at about 400 ℃ to 450 ℃₃) The salt bath is subjected to ion exchange for 1 to 8 hours, preferably for 2 to 4 hours.

In some preferred embodiments, the Na salt (e.g., NaNO) is melted at 450 deg.C₃) The salt bath of (2) has an ion exchange layer depth of 80 μm or more, preferably 85 μm or more, for about 8 hours.

In some embodiments, there are also an ion implantation method of implanting ions into a surface layer of glass or glass ceramics, and a thermal tempering method of heating glass or glass ceramics and then rapidly cooling the same.

The glass composition, the microcrystalline glass and/or the microcrystalline glass product disclosed by the invention are tested by adopting the following methods:

[ coefficient of thermal expansion ]

Coefficient of thermal expansion (alpha)_20℃-120℃) The test was carried out according to the test method GB/T7962.16-2010.

[ refractive index ]

The refractive index (nd) was measured according to GB/T7962.1-2010 method.

[ haze ]

A haze tester EEL57D was used, prepared from 0.55mm thick glass samples and tested according to GB 2410-80.

[ grain size ]

And (3) determining by using an SEM (scanning electron microscope), carrying out surface treatment on the microcrystalline glass in HF (hydrofluoric acid), carrying out gold spraying on the surface of the microcrystalline glass, and carrying out surface scanning under the SEM, so as to determine the size of the crystal grains.

[ light transmittance ]

A sample is processed to a thickness of 1mm, and the opposite surfaces are polished in parallel, and the average light transmittance of 400 to 800nm is measured by a Hitachi U-41000 spectrophotometer.

The sample was processed to a thickness of 0.55mm and polished in parallel with the opposite surfaces, and the light transmittance at 550nm was measured by means of a Hitachi U-41000 spectrophotometer.

[ temperature coefficient of refractive index ]

The temperature coefficient of the refractive index is tested according to the method specified in GB/T7962.4-2010, and the temperature coefficient of the refractive index at 20-40 ℃ is measured.

[ degree of crystallinity ]

The XRD diffraction peaks were compared with the database spectra, and the degree of crystallinity was obtained by calculating the proportion of the diffraction intensity of the crystalline phase in the intensity of the entire spectrum, and was internally calibrated by using pure quartz crystals.

[ surface stress ] and [ depth of ion exchange layer ]

And (4) carrying out surface stress measurement by using a glass surface stress meter FSM-6000 LEUV.

Ion exchange layer depth was measured using a glass surface stress meter SLP-2000.

The refractive index of the sample was 1.54 and the optical elastic constant was 25.3[ (nm/cm)/MPa, which were used as the measurement conditions.

[ falling ball test height ]

The samples of 150X 57X 0.55mm were polished on both surfaces and placed on a rubber sheet, and 132g of steel balls were dropped from a predetermined height to obtain a maximum ball drop test height at which the samples could withstand an impact without breaking. Specifically, the test was conducted from a ball drop test height of 650mm, and the heights were changed in the order of 700mm, 750mm, 800mm, 850mm, and 900mm and above without breaking. For the examples having the "falling ball test height", a crystallized glass article was used as a test object. The test data recorded as 900mm in the examples shows that the crystallized glass product was not broken and received an impact even when the steel ball was dropped from the height of 900 mm.

[ fracture toughness ]

The method for directly measuring the size of the indentation propagation crack is used, the specification of a sample is 2mm multiplied by 4mm multiplied by 20mm, after the sample is chamfered, ground and polished, a Vickers hardness indenter is used for applying 49N force on the sample and maintaining the force for 30s, after the indentation is made, the fracture strength is measured by a three-point bending method.

[ four-point bending Strength ]

The test is carried out by adopting a microcomputer control electronic universal tester CMT6502, the glass specification is 150 multiplied by 57 multiplied by 0.55mm and the ASTM C158-2002 is taken as a standard.

The glass composition of the present invention has the following properties:

1) in some embodiments, the coefficient of thermal expansion (α)_20℃-120℃) Is 45 x 10^-7/K～70×10^-7Preferably 50X 10,/K^-7/K～70×10^-7/K。

2) In some embodiments, the refractive index (nd) is 1.500 to 1.530, preferably 1.510 to 1.525.

The microcrystalline glass has the following properties:

1) in some embodiments, the haze is 0.6% or less, preferably 0.5% or less, more preferably 0.4% or less for a thickness of 0.55 mm.

2) In some embodiments, the crystal grain size is 100nm or less, preferably 80nm or less, more preferably 60nm or less, further preferably 50nm or less, and still further preferably 40nm or less.

3) In some embodiments, the temperature coefficient of refractive index of the microcrystalline glass of the present invention is-0.5X 10^-6Below/° C, preferably-0.8X 10^-6Below/° C, more preferably-1.1X 10^-6Below/° c.

4) In some embodiments, the crystallinity is 50% or more, preferably 65% or more, more preferably 70% or more, and even more preferably 75% or more.

5) In some embodiments, the refractive index (nd) is 1.520 to 1.550, preferably 1.530 to 1.545.

6) In some embodiments, the average light transmittance of 400 to 800nm at a thickness of 1mm is 80% or more, preferably 85% or more, and more preferably 88% or more.

7) In some embodiments, the 0.55mm thickness 550nm light transmittance is 80% or more, preferably 85% or more, more preferably 88% or more, and even more preferably 91% or more.

The microcrystalline glass product of the invention has the following properties besides the properties of the microcrystalline glass:

1) in some embodiments, the surface stress is 200MPa or greater, preferably 250MPa or greater, more preferably 300MPa or greater;

2) in some embodiments, the four-point bending strength is 600MPa or greater, preferably 650MPa or greater, more preferably 700MPa or greater;

3) in some embodiments, the depth of the ion exchange layer is 30 μm or more, preferably 50 μm or more, more preferably 60 μm or more, and further preferably 80 μm or more;

4) in some embodiments, the ball drop test height is 700mm or more, preferably 800mm or more, more preferably 1000mm or more, and even more preferably 1200mm or more;

5) in some embodiments, the fracture toughness is 1 MPa-m^1/2Above, preferably 1.3MPa · m^1/2More preferably 1.5MPa · m or more^1/2The above.

The microcrystalline glass and the microcrystalline glass product have the excellent performance, so that the microcrystalline glass and the microcrystalline glass product can be widely made into glass cover plates or glass components; meanwhile, the glass ceramics products, and the glass cover plates or glass components made of the glass ceramics can also be applied to electronic equipment or display equipment, such as mobile phones, watches, computers, touch display screens and the like.

Examples

In order to further clarify the explanation and explanation of the technical solution of the present invention, the following non-limiting examples are provided. Many efforts have been made to ensure accuracy with respect to numbers (e.g., amounts, temperature, etc.) but some errors and deviations should be accounted for. The composition is itself given in weight% on oxide basis and has been standardized to 100%.

The following tables 1 to 3 show examples of glass compositions

Table 1.

Table 2.

Table 3.

Examples of the microcrystalline glass shown in tables 4 to 6 are shown in Table 4 below.

Table 5.

Table 6.

Examples of the glass-ceramic product are shown in tables 7 to 9 below

Table 7.

Table 8.

Table 9.

Claims

1. A transparent glass-ceramic product, characterized in that its main crystalline phase contains lithium silicate and quartz crystalline phase, the transparent glass-ceramic product has a light transmittance of 80% or more at a wavelength of 550nm at a thickness of 0.55mm, and its composition, expressed in weight percent, contains: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；Na₂O: 0 to 5% of (SiO)₂+Li₂O)/Al₂O₃Is 6 to 12, (Al)₂O₃+Li₂O)/P₂O₅8.89 to 19.5.

2. The transparent glass-ceramic article according to claim 1, wherein the composition further comprises, in weight percent: SrO: 0 to 5 percent; and/or BaO: 0 to 5 percent; and/or TiO₂: 0 to 5 percent; and/or Y₂O₃: 0 to 5 percent; and/or B₂O₃: 0 to 3 percent; and/or a clarifying agent: 0 to 2 percent.

3. Transparent glass-ceramic article, characterized in that its main crystalline phase comprises a lithium silicate and a quartz crystalline phase, and its composition, expressed in weight percentages, comprises: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；Na₂O：0～5％；B₂O₃: 0 to 3 percent; a clarifying agent: 0 to 2% of (SiO)₂+Li₂O)/Al₂O₃Is 6 to 12, (Al)₂O₃+Li₂O)/P₂O₅8.89 to 19.5.

4. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 12; and/or (Al)₂O₃+Li₂O)/P₂O₅8.89 to 17; and/or Li₂O/(K₂O+ZrO₂) 2.3 to 4.0; and/or (SiO)₂+Li₂O)/P₂O₅40 to 80; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90; and/or (K)₂O+MgO)/ZrO₂0.6 to 1.2.

5. A transparent glass-ceramic product according to any one of claims 1 to 3, characterized in that it has a composition comprising, in weight%: SiO 2₂: 70-80%; and/or Al₂O₃: 4-12%; and/or Li₂O: 7-15%; and/or ZrO₂: 0.5-6%; and/or P₂O₅: 0.5-5%; and/or K₂O: 0 to 5 percent; and/or MgO: 0 to 5 percent; and/or ZnO: 0 to 5 percent; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 3 percent; and/or B₂O₃: 0.1-2%; and/or a clarifying agent: 0 to 1 percent.

6. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 11.5; and/or (Al)₂O₃+Li₂O)/P₂O₅8.89 to 13.5;and/or Li₂O/(K₂O+ZrO₂) 2.5 to 3.5; and/or (SiO)₂+Li₂O)/P₂O₅40 to 70; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85; and/or (K)₂O+MgO)/ZrO₂0.7 to 1.1.

7. A transparent glass-ceramic product according to any one of claims 1 to 3, characterized in that it has a composition comprising, in weight%: SiO 2₂: 70-76%; and/or Al₂O₃: 4-10%; and/or Li₂O: 8-12.5%; and/or ZrO₂: 1-5%; and/or P₂O₅: 1-2%; and/or K₂O: 0 to 3 percent; and/or MgO: 0.3-2%; and/or ZnO: 0 to 3 percent; and/or Na₂O: 0 to 1% and/or Sb₂O₃: 0 to 1 percent; and/or SnO₂: 0 to 1 percent; and/or SnO: 0 to 1 percent; and/or CeO₂：0～1％。

8. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein: (SiO)₂+Li₂O)/Al₂O₃8.5 to 11.5; and/or (Al)₂O₃+Li₂O)/P₂O₅9 to 12; and/or Li₂O/(K₂O+ZrO₂) 2.8 to 3.3; and/or (SiO)₂+Li₂O)/P₂O₅42 to 60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅46 to 80; and/or (K)₂O+MgO)/ZrO₂0.8 to 1.0.

9. A transparent glass-ceramic product according to any one of claims 1 to 3, characterized in that it has a composition comprising, in weight%: li₂O: 8 to less than 10 percent; and/or does not contain SrO; and/or no BaO; and/or does not contain TiO₂(ii) a And/or does not contain Y₂O₃(ii) a And/or does not contain GeO₂(ii) a And/or does not contain CaO; and/or does not contain Cs₂O; and/or does not contain PbO; and/or do not contain B₂O₃(ii) a And/or does not contain As₂O₃(ii) a And/or do not contain La₂O₃(ii) a And/or does not contain Tb₂O₃。

10. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein: (Al)₂O₃+Li₂O)/P₂O₅9.16 to 11; and/or (SiO)₂+Li₂O)/P₂O₅45-60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅Is 48 to 80; and/or (SiO)₂+Li₂O)/Al₂O₃Is 9 to 11.

11. A transparent glass-ceramic article according to any one of claims 1 to 3, characterized in that its main crystalline phases contain lithium disilicate and a quartz crystalline phase and/or petalite.

12. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the predominant crystalline phase comprises 50 to 92% by weight of the transparent glass-ceramic article.

13. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the predominant crystalline phase comprises 60 to 90% by weight of the transparent glass-ceramic article.

14. The transparent crystallized glass article according to any one of claims 1 to 3, wherein the predominant crystalline phase constitutes 65 to 85% by weight of the transparent crystallized glass article.

15. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the predominant crystalline phase comprises 70 to 80% by weight of the transparent glass-ceramic article.

16. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the predominant crystalline phase comprises 80 to 92% by weight of the transparent glass-ceramic article.

17. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 40%.

18. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 35%.

19. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 30%.

20. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 25%.

21. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has petalite crystal phase weight percent of less than 20%.

22. The transparent glass-ceramic article according to claim 11, wherein the transparent glass-ceramic article has petalite crystal phase weight percent of less than 15%.

23. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is less than 70%.

24. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is less than 65%.

25. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is less than 60%.

26. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is less than 55%.

27. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is less than 50%.

28. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the quartz crystal phase of the transparent glass-ceramic article is 45% or less.

29. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the crystalline phase of lithium silicate in the transparent glass-ceramic article is less than 55%.

30. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the crystalline phase of lithium silicate in the transparent glass-ceramic article is less than 50%.

31. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the crystalline phase of lithium silicate in the transparent glass-ceramic article is 45% or less.

32. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the weight percentage of the crystalline phase of lithium silicate in the transparent glass-ceramic article is less than 40%.

33. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the degree of crystallinity is 50% or more.

34. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the degree of crystallinity is 65% or more.

35. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the degree of crystallinity is 70% or more.

36. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the degree of crystallinity is 75% or more.

37. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein a light transmittance at a wavelength of 550nm at a thickness of 0.55mm is 80% or more; and/or an average light transmittance of 400 to 800nm wavelength with a thickness of 1mm of 80% or more.

38. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the 0.55mm thick 550nm wavelength light transmittance is 85% or more; and/or the average light transmittance of the film with a thickness of 1mm and a wavelength of 400-800 nm is more than 85%.

39. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein a light transmittance at a wavelength of 550nm at a thickness of 0.55mm is 88% or more; and/or an average light transmittance of 400 to 800nm wavelength with a thickness of 1mm of 88% or more.

40. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the transmittance of light having a wavelength of 550nm and a thickness of 0.55mm is 91% or more.

41. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the surface stress is 200MPa or more; and/or the depth of the ion exchange layer is 30 μm or more.

42. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the surface stress is 250MPa or more; and/or the depth of the ion exchange layer is 50 μm or more.

43. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the surface stress is 300MPa or more; and/or the depth of the ion exchange layer is 60 μm or more.

44. The transparent glass-ceramic product according to any one of claims 1 to 3, wherein the depth of the ion-exchange layer is 80 μm or more.

45. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein a falling ball test height is 700mm or more; and/or a fracture toughness of 1MPa m^1/2The above; and/or a four-point bending strength of 600MPa or more.

46. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein a falling ball test height is 800mm or more; and/or a fracture toughness of 1.3 MPa.m^1/2The above; and/or a four-point bending strength of 650MPa or more.

47. The transparent glass-ceramic product according to any of claims 1 to 3, characterized in thatCharacterized in that the ball drop test height is more than 1000 mm; and/or a fracture toughness of 1.5MPa m^1/2The above; and/or a four-point bending strength of 700MPa or more.

48. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein a falling ball test height is 1200mm or more.

49. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the haze at a thickness of 0.55mm is 0.6% or less; and/or the grain size is 100nm or less; and/or a temperature coefficient of refractive index of-0.5X 10^-6Below/° c.

50. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the haze at a thickness of 0.55mm is 0.5% or less; and/or the grain size is 80nm or less; and/or a temperature coefficient of refractive index of-0.8X 10^-6Below/° c.

51. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the haze at a thickness of 0.55mm is 0.4% or less; and/or the grain size is below 60 nm; and/or a temperature coefficient of refractive index of-1.1X 10^-6Below/° c.

52. The transparent glass-ceramic article according to any one of claims 1 to 3, wherein the crystal grain size is 50nm or less.

53. Transparent glass ceramic, characterized in that its main crystalline phases comprise lithium silicate and quartz crystalline phases, and its composition, expressed in weight percentages, comprises: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O: 0 to 10 percent; MgO: 0 to 10 percent; ZnO: 0 to 10% of (SiO)₂+Li₂O)/Al₂O₃Is 6 to 12, (Al)₂O₃+Li₂O)/P₂O₅8.89 to 19.5.

54. The transparent glass-ceramic according to claim 53, wherein the composition further comprises, in weight percent: SrO: 0 to 5 percent; and/or BaO: 0 to 5 percent; and/or TiO₂: 0 to 5 percent; and/or Y₂O₃: 0 to 5 percent; and/or Na₂O: 0 to 3 percent; and/or B₂O₃: 0 to 3 percent; and/or a clarifying agent: 0 to 2 percent.

55. The transparent glass-ceramic according to any one of claims 53 or 54, wherein: (Al)₂O₃+Li₂O)/P₂O₅8.89 to 17; and/or Li₂O/(K₂O+ZrO₂) 2.3 to 4.0; and/or (SiO)₂+Li₂O)/P₂O₅40 to 80; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90; and/or (K)₂O+MgO)/ZrO₂0.6 to 1.2.

56. The transparent glass-ceramic according to any one of claims 53 or 54, having a composition, expressed in weight percent, comprising: SiO 2₂: 70-80%; and/or Al₂O₃: 4-12%; and/or Li₂O: 7-15%; and/or ZrO₂: 0.5-6%; and/or P₂O₅: 0.5-5%; and/or K₂O: 0 to 5 percent; and/or MgO: 0 to 5 percent; and/or ZnO: 0 to 5 percent; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or B₂O₃: 0.1-2%; and/or a clarifying agent: 0 to 1 percent.

57. As claimed in any of claims 53 or 54The transparent glass ceramics is characterized in that: (SiO)₂+Li₂O)/Al₂O₃8 to 12; and/or (Al)₂O₃+Li₂O)/P₂O₅8.89 to 13.5; and/or Li₂O/(K₂O+ZrO₂) 2.5 to 3.5; and/or (SiO)₂+Li₂O)/P₂O₅40 to 70; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85; and/or (K)₂O+MgO)/ZrO₂0.7 to 1.1.

58. The transparent glass-ceramic according to any one of claims 53 or 54, having a composition, expressed in weight percent, comprising: SiO 2₂: 70-76%; and/or Al₂O₃: 4-10%; and/or Li₂O: 8-12.5%; and/or ZrO₂: 1-5%; and/or P₂O₅: 1-2%; and/or K₂O: 0 to 3 percent; and/or MgO: 0.3-2%; and/or ZnO: 0 to 3 percent; and/or Sb₂O₃: 0 to 1 percent; and/or SnO₂: 0 to 1 percent; and/or SnO: 0 to 1 percent; and/or CeO₂：0～1％。

59. The transparent glass-ceramic according to any one of claims 53 or 54, wherein: (SiO)₂+Li₂O)/Al₂O₃8 to 11.5; and/or (Al)₂O₃+Li₂O)/P₂O₅9 to 12; and/or Li₂O/(K₂O+ZrO₂) 2.8 to 3.3; and/or (SiO)₂+Li₂O)/P₂O₅42 to 60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅46 to 80; and/or (K)₂O+MgO)/ZrO₂0.8 to 1.0.

60. The transparent glass-ceramic as claimed in any of claims 53 or 54The paint is characterized by comprising the following components in percentage by weight: li₂O: 8 to less than 10 percent; does not contain SrO; and/or no BaO; and/or does not contain TiO₂(ii) a And/or does not contain Y₂O₃(ii) a And/or does not contain GeO₂(ii) a And/or does not contain CaO; and/or does not contain Cs₂O; and/or does not contain PbO; and/or does not contain As₂O₃(ii) a And/or do not contain La₂O₃(ii) a And/or does not contain Tb₂O₃(ii) a And/or does not contain Na₂O; and/or do not contain B₂O₃。

61. The transparent glass-ceramic according to any one of claims 53 or 54, wherein: (Al)₂O₃+Li₂O)/P₂O₅9.16 to 11; and/or (SiO)₂+Li₂O)/P₂O₅45-60; and/or (SiO)₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅Is 48 to 80; and/or (SiO)₂+Li₂O)/Al₂O₃8.5 to 11.5.

62. The transparent glass-ceramic according to any one of claims 53 or 54, wherein: (SiO)₂+Li₂O)/Al₂O₃Is 9 to 11.

63. The transparent glass-ceramic according to one of claims 53 or 54, wherein its predominant crystalline phases comprise lithium disilicate and the quartz crystalline phase and/or petalite.

64. The transparent glass-ceramic according to claim 53 or 54, wherein the predominant crystalline phase comprises 50 to 92% by weight of the transparent glass-ceramic.

65. The transparent glass-ceramic according to claim 53 or 54, wherein the predominant crystalline phase comprises 60 to 90 weight percent of the transparent glass-ceramic.

66. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the predominant crystalline phase comprises 65 to 85 weight percent of the transparent glass-ceramic.

67. The transparent glass-ceramic according to claim 53 or 54, wherein the predominant crystalline phase comprises 70 to 80% by weight of the transparent glass-ceramic.

68. The transparent glass-ceramic according to claim 53 or 54, wherein the predominant crystalline phase comprises 80 to 92% by weight of the transparent glass-ceramic.

69. The transparent glass-ceramic according to claim 63, wherein the transparent glass-ceramic has a petalite crystalline phase weight percent of less than 40%.

70. The transparent glass-ceramic according to claim 63, wherein the transparent glass-ceramic has a petalite crystalline phase weight percent of 35% or less.

71. The transparent glass-ceramic according to claim 63, wherein the transparent glass-ceramic has a petalite crystal phase weight percentage of 30% or less.

72. The transparent glass-ceramic according to claim 63, wherein the transparent glass-ceramic has a petalite crystal phase weight percentage of less than 25%.

73. The transparent glass-ceramic of claim 63, wherein the transparent glass-ceramic has petalite crystal phase weight percent of less than 20%.

74. The transparent glass-ceramic according to claim 63, wherein the transparent glass-ceramic has petalite crystal phase weight percent below 15%.

75. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of less than 70%.

76. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of 65% or less.

77. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of 60% or less.

78. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of 55% or less.

79. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of 50% or less.

80. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a quartz crystal phase weight percentage of 45% or less.

81. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a lithium silicate crystalline phase weight percent of less than 55%.

82. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a weight percentage of lithium silicate crystalline phase below 50%.

83. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a weight percentage of lithium silicate crystalline phase below 45%.

84. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the transparent glass-ceramic has a weight percentage of lithium silicate crystalline phase below 40%.

85. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the degree of crystallinity is 50% or more.

86. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the degree of crystallinity is 65% or more.

87. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the degree of crystallinity is 70% or more.

88. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the degree of crystallinity is 75% or more.

89. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the haze at a thickness of 0.55mm is 0.5% or less; and/or the grain size is 100nm or less.

90. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the haze at a thickness of 0.55mm is 0.4% or less; and/or the grain size is 80nm or less.

91. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the crystal grain size is 60nm or less.

92. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the crystal grain size is 50nm or less.

93. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the temperature coefficient of refractive index of the transparent glass-ceramic is-0.5 x 10^-6Below/° c.

94. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the temperature coefficient of refractive index of the transparent glass-ceramic is-0.8 x 10^-6Below/° c.

95. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the temperature coefficient of refractive index of the transparent glass-ceramic is-1.1 x 10^-6Below/° c.

96. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the average light transmittance at a wavelength of 400 to 800nm at a thickness of 1mm is 80% or more; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 80% or more.

97. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the average light transmittance at a wavelength of 400 to 800nm at a thickness of 1mm is 85% or more; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 85% or more.

98. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the average light transmittance at a wavelength of 400 to 800nm at a thickness of 1mm is 88% or more; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 88% or more.

99. The transparent glass-ceramic according to any one of claims 53 or 54, wherein the 0.55mm thick 550nm wavelength light transmittance is 91% or more.

100. Glass cover plate, characterized in that it comprises a transparent glass-ceramic product according to any of claims 1 to 52 and/or a transparent glass-ceramic according to any of claims 53 to 99.

101. A glass component comprising the transparent glass-ceramic product according to any one of claims 1 to 52 and/or the transparent glass-ceramic according to any one of claims 53 to 99.

102. A display device comprising the transparent glass-ceramic article according to any one of claims 1 to 52, and/or the transparent glass-ceramic according to any one of claims 53 to 99, and/or the glass cover plate according to claim 100.

103. An electronic device comprising the transparent glass-ceramic product according to any one of claims 1 to 52, the transparent glass-ceramic according to any one of claims 53 to 99, the glass cover plate according to claim 100, and the glass component according to claim 101.

104. A method for producing a transparent glass-ceramic article, characterized in that the method comprises the steps of:

forming a glass composition having a composition, expressed in weight percent, comprising: SiO 2₂：65～85％；Al₂O₃：1～15％；Li₂O：5～15％；ZrO₂：0.1～10％；P₂O₅：0.1～10％；K₂O：0～10％；MgO：0～10％；ZnO：0～10％；SrO：0～5％；BaO：0～5％；TiO₂：0～5％；Y₂O₃：0～5％；B₂O₃：0～3％；Na₂O: 0 to 3 percent; a clarifying agent: 0 to 2% of (SiO)₂+Li₂O)/Al₂O₃Is 6 to 12, (Al)₂O₃+Li₂O)/P₂O₅8.89 to 19.5;

and then, forming a transparent glass-ceramic product by the transparent glass-ceramic through a chemical toughening process, wherein the transparent glass-ceramic has a light transmittance of more than 80% at a wavelength of 550nm and a thickness of 0.55 mm.

105. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises, in weight percent: SiO 2₂: 70-80%; and/or Al₂O₃: 4-12%; and/or Li₂O: 7-15%; and/or ZrO₂: 0.5-6%; and/or P₂O₅: 0.5-5%; and/or K₂O: 0 to 5 percent; and/or MgO: 0 to 5 percent; and/or ZnO: 0 to 5 percent; and/or SrO: 0 to 1 percent; and/or BaO: 0 to 1 percent; and/or TiO₂: 0 to 1 percent; and/or Y₂O₃: 0 to 1 percent; and/or Na₂O: 0 to 1 percent; and/or a clarifying agent: 0 to 1 percent.

106. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises, in weight percent: SiO 2₂: 70-76%; and/or Al₂O₃: 4-10%; and/or Li₂O: 8-12.5; and/or ZrO₂: 1-5%; and/or P₂O₅: 1-2%; and/or K₂O: 0 to 3 percent; and/or MgO: 0.5-2%; and/or ZnO: 0 to 3 percent.

107. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises one or more of the following 6:

1)(SiO₂+Li₂O)/Al₂O₃8 to 12;

2)(Al₂O₃+Li₂O)/P₂O₅8.89 to 17;

3)(SiO₂+Li₂O)/P₂O₅40 to 80;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅40 to 90;

5)(K₂O+MgO)/ZrO₂0.6 to 1.2;

6)Li₂O/(K₂O+ZrO₂) 2.3 to 4.0.

108. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises one or more of the following 6:

1)(SiO₂+Li₂O)/Al₂O₃8 to 11.5;

2)(Al₂O₃+Li₂O)/P₂O₅8.89 to 13.5;

3)(SiO₂+Li₂O)/P₂O₅40 to 70;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅45-85;

5)(K₂O+MgO)/ZrO₂0.7 to 1.1;

6)Li₂O/(K₂O+ZrO₂) 2.5 to 3.5.

109. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises one or more of the following 6:

1)(SiO₂+Li₂O)/Al₂O₃8.5 to 11.5;

2)(Al₂O₃+Li₂O)/P₂O₅9 to 12;

3)(SiO₂+Li₂O)/P₂O₅42 to 60;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅46 to 80;

5)(K₂O+MgO)/ZrO₂0.8 to 1.0;

6)Li₂O/(K₂O+ZrO₂) 2.8 to 3.3.

110. The method of making a transparent glass-ceramic article according to claim 104, wherein the glass composition comprises one or more of the following 4:

1)(SiO₂+Li₂O)/Al₂O₃9 to 11;

2)(Al₂O₃+Li₂O)/P₂O₅9.16 to 11;

3)(SiO₂+Li₂O)/P₂O₅45-60;

4)(SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅is 48 to 80.

111. The method of claim 104, wherein the crystallization process comprises the steps of: heating to a specified crystallization treatment temperature, keeping the temperature for a certain time after reaching the heat treatment temperature, and then cooling, wherein the crystallization treatment temperature is 490-800 ℃, and the keeping time at the crystallization treatment temperature is 0-8 hours.

112. The method of claim 104, wherein the crystallization process comprises the steps of: heating to a specified crystallization treatment temperature, keeping the temperature for a certain time after reaching the heat treatment temperature, and then cooling, wherein the crystallization treatment temperature is 550-750 ℃, and the keeping time at the crystallization treatment temperature is 1-6 hours.

113. The method of claim 104, wherein the crystallization process comprises the steps of: the treatment of the nucleation process is performed at the 1 st temperature, and then the treatment of the crystal growth process is performed at the 2 nd temperature higher than the nucleation process temperature.

114. The method of making a transparent crystallized glass article of claim 113, wherein the crystallization process comprises the steps of: the temperature of No. 1 is 490-650 ℃, the temperature of No. 2 is 600-850 ℃, the holding time at the temperature of No. 1 is 0-24 hours, and the holding time at the temperature of No. 2 is 0-10 hours.

115. The method of making a transparent crystallized glass article of claim 113, wherein the crystallization process comprises the steps of: the temperature of the No. 1 is 490-650 ℃, the temperature of the No. 2 is 600-850 ℃, the holding time at the temperature of the No. 1 is 2-15 hours, and the holding time at the temperature of the No. 2 is 0.5-6 hours.

116. The method of making a transparent glass-ceramic article of claim 104, wherein the chemical tempering process comprises: immersing the transparent glass ceramics in a salt bath of molten Na salt at the temperature of 430-470 ℃ for 6-20 hours; and/or immersing the transparent glass ceramics in a salt bath of molten K salt at the temperature of 400-450 ℃ for 1-8 hours.

117. The method of making a transparent glass-ceramic article of claim 104, wherein the chemical tempering process comprises: immersing the transparent glass ceramics in a salt bath of molten Na salt at 435-460 ℃ for 8-13 hours; and/or immersing the transparent glass ceramics in a salt bath of molten K salt at the temperature of 400-450 ℃ for 2-4 hours.

118. The method of claim 104, wherein the ion exchange layer depth of the transparent microcrystalline glass article is up to 80 μ ι η or more by chemical tempering in a bath of molten Na salt at 450 ℃ for 8 hours.

119. The method of claim 104, wherein the ion exchange layer depth of the transparent microcrystalline glass article is 85 μ ι η or more by chemical tempering in a bath of molten Na salt at 450 ℃ for 8 hours.

120. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises lithium disilicate and quartz and/or petalite as predominant crystalline phases.

121. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises a predominant crystalline phase in an amount of 50 to 92% by weight of the transparent glass-ceramic article.

122. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises a predominant crystalline phase in an amount of 60 to 90% by weight of the transparent glass-ceramic article.

123. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises a predominant crystalline phase in an amount of 65 to 85% by weight of the transparent glass-ceramic article.

124. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises a predominant crystalline phase in an amount of 70 to 80% by weight of the transparent glass-ceramic article.

125. The method of any one of claims 104 to 119, wherein the transparent glass-ceramic article comprises a predominant crystalline phase in an amount of 80 to 92% by weight of the transparent glass-ceramic article.

126. The method of claim 120, wherein the transparent microcrystalline glass article has a petalite crystalline phase weight percent of less than 40%.

127. The method of claim 120, wherein the transparent microcrystalline glass article has a petalite crystalline phase weight percent of less than 35%.

128. The method of claim 120, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 30%.

129. The method of claim 120, wherein the transparent microcrystalline glass article has a petalite crystalline phase weight percent of less than 25%.

130. The method of claim 120, wherein the transparent microcrystalline glass article has a petalite crystalline phase weight percent of less than 20%.

131. The method of claim 120, wherein the transparent glass-ceramic article has a petalite crystalline phase weight percent of less than 15%.

132. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 70%.

133. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 65%.

134. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 60%.

135. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 55%.

136. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 50%.

137. The method of making the transparent microcrystalline glass article of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a quartz crystal phase weight percent of less than 45%.

138. The method of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a lithium silicate crystalline phase weight percent of less than 55%.

139. The method of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a lithium silicate crystalline phase weight percent of less than 50%.

140. The method of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a lithium silicate crystalline phase weight percent of less than 45%.

141. The method of any one of claims 104 to 119, wherein the transparent microcrystalline glass article has a lithium silicate crystalline phase weight percent of less than 40%.

142. The method for producing the transparent glass-ceramic article according to any one of claims 104 to 119, wherein the degree of crystallinity of the transparent glass-ceramic article is 50% or more.

143. The method for producing the transparent glass-ceramic article according to any one of claims 104 to 119, wherein the degree of crystallinity of the transparent glass-ceramic article is 65% or more.

144. The method for producing the transparent glass-ceramic article according to any one of claims 104 to 119, wherein the degree of crystallinity of the transparent glass-ceramic article is 70% or more.

145. The method for producing the transparent glass-ceramic article according to any one of claims 104 to 119, wherein the degree of crystallinity of the transparent glass-ceramic article is 75% or more.

146. The method for producing a microcrystalline glass product according to any one of claims 104 to 119, wherein the microcrystalline glass product has a surface stress of 200MPa or more; and/or the depth of the ion exchange layer is more than 30 μm; and/or the ball drop test height is above 700 mm; and/or a fracture toughness of 1MPa m^1/2The above; and/or the four-point bending strength is more than 600 MPa;and/or a haze of 0.6% or less at a thickness of 0.55 mm; and/or the grain size is 100nm or less; and/or a temperature coefficient of refractive index of-0.5X 10^-6Below/° c; and/or the average light transmittance of the film with the thickness of 1mm and the wavelength of 400-800 nm is more than 80%; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 80% or more.

147. The method for producing a microcrystalline glass product according to any one of claims 104 to 119, wherein the microcrystalline glass product has a surface stress of 250MPa or more; and/or the depth of the ion exchange layer is more than 50 μm; and/or the ball drop test height is more than 800 mm; and/or a fracture toughness of 1.3 MPa.m^1/2The above; and/or the four-point bending strength is above 650 MPa; and/or a haze of 0.5% or less at a thickness of 0.55 mm; and/or the grain size is 80nm or less; and/or a temperature coefficient of refractive index of-0.8X 10^-6Below/° c; and/or the average light transmittance of the film with the thickness of 1mm and the wavelength of 400-800 nm is more than 85%; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 85% or more.

148. The method for producing a microcrystalline glass product according to any one of claims 104 to 119, wherein the microcrystalline glass product has a surface stress of 300MPa or more; and/or the depth of the ion exchange layer is more than 60 μm; and/or the ball drop test height is more than 1000 mm; and/or a fracture toughness of 1.5MPa m^1/2The above; and/or a four-point bending strength of 700MPa or more; and/or a haze of 0.4% or less at a thickness of 0.55 mm; and/or the grain size is below 60 nm; and/or a temperature coefficient of refractive index of-1.1X 10^-6Below/° c; and/or the average light transmittance of the light with the thickness of 1mm and the wavelength of 400-800 nm is more than 88 percent; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 88% or more.

149. The method for producing a crystallized glass product according to any one of claims 104 to 119, wherein the crystallized glass product has an ion exchange layer depth of 80 μm or more; and/or the falling ball test height is more than 1200 mm; and/or the grain size is less than 50 nm; and/or a light transmittance at a wavelength of 550nm with a thickness of 0.55mm of 91% or more.