CN110156321A - Glass suitable for chemical strengthening and chemically strengthened glass - Google Patents

Abstract

The present invention provides a kind of glass suitable for chemical strengthening, and component in mole percent, contains: P₂O₅: 38~65%；Al₂O₃: 2~15%；CuO:8~25%；Li₂O:6~30%；V₂O₅: 0.01~3%；MgO:1~15%；BaO:0~10%, wherein 10 × V₂O₅/Li₂O is 0.02~3.0, Li₂O/CuO is 0.3~3.0.It is designed by reasonable component, glass of the present invention is made to be suitable for chemical strengthening while obtaining desired absorbing properties；The chemically reinforced glass that the present invention obtains has excellent near-infrared absorption performance and intensity.

Description

Glass suitable for chemical strengthening and chemically strengthened glass

technical field

The invention relates to a glass, in particular to a near-infrared light-absorbing glass suitable for chemical strengthening and a chemically strengthening glass.

technical field

In recent years, the spectral sensitivity of semiconductor imaging elements such as CCD and CMOS used in digital cameras, camera phones, and VTR cameras has spread from the visible range to the near-infrared range around 1100nm, and filters that absorb light in the near-infrared range have been used. Filters can obtain visual sensitivity similar to that of human beings, so the demand for color sensitivity correction filters is increasing. In the prior art, plastic products are generally used in products such as mobile phones that can take pictures, but such plastic products have disadvantages such as easy to generate static electricity and easy to bend during use, so chemically strengthened glass is used instead of plastic products for mobile phones, etc. equipment, has become a major trend.

The miniaturization and light weight of optoelectronic terminal products promote the thinner and thinner near-infrared light-absorbing glass, but if the glass is directly thinned, the near-infrared light absorption performance of the glass will also become smaller, and the required spectral characteristics cannot be obtained. At the same time, the glass Too thin a glass is also less strong, which puts higher demands on the near-infrared light-absorbing glass used to make these filters.

Contents of the invention

Based on the above reasons, the inventors of the present invention found after a lot of research that excellent strength can be obtained by chemically strengthening glass, and thus developed the glass suitable for chemical strengthening described in the present invention.

(1) Glass suitable for chemical strengthening, its components are expressed in molar percentages, including: P ₂ O ₅ : 38-65%; Al ₂ O ₃ : 2-15%; CuO: 8-25%; Li ₂ O : 6~30%; V ₂ O ₅ : 0.01~3%; MgO: 1~15%; BaO: 0~10%, of which 10×V ₂ O ₅ /Li ₂ O is 0.02~3.0, Li ₂ O/ CuO is 0.3 to 3.0.

(2) The glass suitable for chemical strengthening according to (1), the composition of which is expressed in molar percentage, and further contains: Na ₂ O+K ₂ O is less than 10%; CaO: 0-8%; SrO: 0 ~8%; SiO ₂ : 0~10%; Ln ₂ O ₃ : 0~10%; ZrO ₂ : 0~10%, where Ln ₂ O ₃ is La ₂ O ₃ , Gd ₂ O ₃ , Y ₂ O ₃ , one or more of Yb ₂ O ₃ .

(3) The glass suitable for chemical strengthening according to any one of (1) or (2), its components are expressed in mole percentage, and each component satisfies one or more of the following seven situations:

1) Li ₂ O/Rn ₂ O is 0.4 to 1.0, preferably Li ₂ O/Rn ₂ O is 0.5 to 1.0, more preferably Li ₂ O/Rn ₂ O is 0.7 to 1.0, still more preferably Li ₂ O/Rn ₂ O 0.8~1.0;

2) BaO/MgO is 0.05-5.0, preferably BaO/MgO is 0.1-3.0, more preferably BaO/MgO is 0.15-1.0;

3) Li ₂ O/CuO is 0.5-2.0, preferably Li ₂ O/CuO is 0.8-1.5;

4) Na ₂ O+K ₂ O is less than 8%, preferably Na ₂ O+K ₂ O is less than 5%;

5) (Li ₂ O+CuO)/P ₂ O ₅ is 0.3-1.2, preferably (Li ₂ O+CuO)/P ₂ O ₅ is 0.4-1.0, more preferably (Li ₂ O+CuO)/P ₂ O ₅ is 0.5 to 0.8;

6) 10×V ₂ O ₅ /Li ₂ O is 0.05-2.0, preferably 10×V ₂ O ₅ /Li ₂ O is 0.1-0.8;

7) RO/CuO is 2.0 or less, preferably RO/CuO is 0.2 to 1.5, more preferably RO/CuO is 0.3 to 1.0,

Here, Rn ₂ O is the total content of Li ₂ O, Na ₂ O, and K ₂ O, and RO is the total content of MgO, CaO, SrO, and BaO.

(4) The glass suitable for chemical strengthening according to any one of (1) or (2), the composition of which is represented by mole percentage, including: P ₂ O ₅ : 40-60%, preferably P ₂ O ₅ : 45% ~55%; and/or _Al2O3 : ₅ ~13%, preferably _Al2O3 : ₆ ~11%; and/or CuO: 10~22%, preferably CuO: 14~20%; and/or Li ₂ O: 10-22%, preferably Li ₂ O: 12-20%; and/or V ₂ O ₅ : 0.05-2%, preferably V ₂ O ₅ : 0.1-1%; and/or MgO: 2-12% %, preferably MgO: 4-10%; and/or BaO: 0.5-8%, preferably BaO: 1-6%; and/or CaO: 0-5%, preferably CaO: 0-3%; and/or SrO : 0-5%, preferably SrO: 0-3%; and/or SiO ₂ : 0-5%, preferably SiO ₂ : 0-2%; and/or Ln ₂ O ₃ : 0-5%, preferably Ln ₂ O ₃ : 0-2%; and/or ZrO ₂ : 0-5%, preferably ZrO ₂ : 0-2%, wherein Ln ₂ O ₃ is La ₂ O ₃ , Gd ₂ O ₃ , Y ₂ O ₃ , Yb One or more of ₂ O ₃ .

(5) The glass suitable for chemical strengthening according to any one of (1) or (2), its components are expressed in mole percentage, P ₂ O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O _5. The total content of MgO and BaO is 95% or more, preferably the total content of P ₂ O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O ₅ , MgO and BaO is 97% or more, more preferably P ₂ The total content of O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O ₅ , MgO, and BaO is 98% or more.

(6) According to any one of (1) or (2), the glass suitable for chemical strengthening does not contain B ₂ O ₃ in its components; and/or does not contain ZnO; and/or does not contain F; and/or Or do not contain Fe.

(7) The glass suitable for chemical strengthening according to any one of (1) or (2), the crystallization upper limit temperature of the glass is below 1050°C, preferably below 1040°C, more preferably below 1030°C; and /or the transition temperature T _g is above 405°C, preferably above 410°C, more preferably between 415°C and 450°C; and/or the density ρ is below 3.1 g/cm ³ , preferably below 3.0 g/cm ³ , more preferably 2.9 g/cm ³ or less; and/or thermal expansion coefficient α _20-120°C is 98×10 ^-7 /K or less, preferably 93×10 ^-7 /K or less, more preferably 90×10 ^-7 /K or less.

(8) According to the glass suitable for chemical strengthening according to any one of (1) or (2), when the transmittance of the glass with a thickness of 0.11 mm reaches 50%, the corresponding wavelength λ ₅₀ is 622 to 650 nm, preferably 628 to 650 nm. 645nm, more preferably 630-640nm.

(9) The glass suitable for chemical strengthening according to any one of (1) or (2), wherein the transmittance τ ₄₀₀ at 400 nm of glass with a thickness of 0.11 mm is 73% or more, preferably 76% or more, more preferably 78% or more; and/or the transmittance τ ₁₁₀₀ at 1100 nm is 15% or less, preferably 13% or less, more preferably 10% or less.

(10) Chemically strengthened glass, the composition of which is expressed in molar percentage, containing: P ₂ O ₅ : 38-65%; Al ₂ O ₃ : 2-15%; CuO: 8-25%; Li ₂ O: 6-65% 30%; V ₂ O ₅ : 0.01~3%; MgO: 1~15%; BaO: 0~10%; Na ₂ O+K ₂ O is less than 10%; CaO: 0~8%; SrO: 0~ 8%; SiO ₂ : 0~10%; Ln ₂ O ₃ : 0~10%; ZrO ₂ : 0~10%, where 10×V ₂ O ₅ /Li ₂ O is 0.02~3.0, Li ₂ O/CuO is 0.3-3.0, and Ln ₂ O ₃ is one or more of La ₂ O ₃ , Gd ₂ O ₃ , Y ₂ O ₃ , and Yb ₂ O ₃ .

(11) According to the chemically strengthened glass described in (10), its components are expressed in mole percentages, and each component satisfies one or more of the following seven situations:

1) Li ₂ O/Rn ₂ O is 0.4 to 1.0, preferably Li ₂ O/Rn ₂ O is 0.5 to 1.0, more preferably Li ₂ O/Rn ₂ O is 0.7 to 1.0, still more preferably Li ₂ O/Rn ₂ O 0.8~1.0;

2) BaO/MgO is 0.05-5.0, preferably BaO/MgO is 0.1-3.0, more preferably BaO/MgO is 0.15-1.0;

3) Li ₂ O/CuO is 0.5-2.0, preferably Li ₂ O/CuO is 0.8-1.5;

4) Na ₂ O+K ₂ O is less than 8%, preferably Na ₂ O+K ₂ O is less than 5%;

5) (Li ₂ O+CuO)/P ₂ O ₅ is 0.3-1.2, preferably (Li ₂ O+CuO)/P ₂ O ₅ is 0.4-1.0, more preferably (Li ₂ O+CuO)/P ₂ O ₅ is 0.5 to 0.8;

6) 10×V ₂ O ₅ /Li ₂ O is 0.05-2.0, preferably 10×V ₂ O ₅ /Li ₂ O is 0.1-0.8;

7) RO/CuO is 2.0 or less, preferably RO/CuO is 0.2 to 1.5, more preferably RO/CuO is 0.3 to 1.0,

Here, Rn ₂ O is the total content of Li ₂ O, Na ₂ O, and K ₂ O, and RO is the total content of MgO, CaO, SrO, and BaO.

(12) The chemically strengthened glass according to (10), the composition of which is represented by mole percentage, including: P ₂ O ₅ : 40-60%, preferably P ₂ O ₅ : 45-55%; and/or Al ₂ O ₃ : 5-13%, preferably Al ₂ O ₃ : 6-11%; and/or CuO: 10-22%, preferably CuO: 14-20%; and/or Li ₂ O: 10-22%, preferably Li ₂ O: 12-20%; and/or V ₂ O ₅ : 0.05-2%, preferably V ₂ O ₅ : 0.1-1%; and/or MgO: 2-12%, preferably MgO: 4-10% and/or BaO: 0.5-8%, preferably BaO: 1-6%; and/or CaO: 0-5%, preferably CaO: 0-3%; and/or SrO: 0-5%, preferably SrO: 0-3%; and/or SiO ₂ : 0-5%, preferably SiO ₂ : 0-2%; and/or Ln ₂ O ₃ : 0-5%, preferably Ln ₂ O ₃ : 0-2%; and /or ZrO ₂ : 0-5%, preferably ZrO ₂ : 0-2%, wherein Ln ₂ O ₃ is one or more of La ₂ O ₃ , Gd ₂ O ₃ , Y ₂ O ₃ , Yb ₂ O ₃ kind.

(13) According to the chemically strengthened glass described in (10), its components are expressed in mole percent, and the total content of P ₂ O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O ₅ , MgO and BaO is 95% or more, preferably the total content of P ₂ O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O ₅ , MgO, and BaO is 97% or more, more preferably P ₂ O ₅ , Al ₂ O ₃ , CuO The total content of Li ₂ O, V ₂ O ₅ , MgO and BaO is 98% or more.

(14) The chemically strengthened glass according to (10), which does not contain B ₂ O ₃ ; and/or does not contain ZnO; and/or does not contain F; and/or does not contain Fe.

(15) The chemically strengthened glass according to (10), wherein the crystallization upper limit temperature of the glass is 1050°C or lower, preferably 1040°C or lower, more preferably 1030°C or lower; and/or the transition temperature _Tg is 405°C Above, preferably above 410°C, more preferably 415-450°C; and/or the density ρ is below 3.1 g/cm ³ , preferably below 3.0 g/cm ³ , more preferably below 2.9 g/cm ³ ; and/or Or the coefficient of thermal expansion α _20-120°C is 98×10 ^-7 /K or less, preferably 93×10 ^-7 /K or less, more preferably 90×10 ^-7 /K or less.

(16) The chemically strengthened glass according to (10), wherein the wavelength λ ₅₀ corresponding to the transmittance of 0.11 mm thick glass at 50% is 622-650 nm, preferably 628-645 nm, more preferably 630-640 nm.

(17) The chemically strengthened glass according to (10), wherein the transmittance τ ₄₀₀ of the 0.11 mm thick glass at 400 nm is 73% or more, preferably 76% or more, more preferably 78% or more; and/or 1100 nm The transmittance τ ₁₁₀₀ is 15% or less, preferably 13% or less, more preferably 10% or less.

(18) The chemically strengthened glass according to (10), wherein the flexural strength σ of glass having a thickness of 0.11 mm is 400 MPa or more, preferably 450 MPa or more, more preferably 500 MPa or more, and still more preferably 520 to 700 MPa.

(19) A glass element containing the glass suitable for chemical strengthening described in any one of (1) to (9), or containing the chemically strengthened glass described in any one of (10) to (18).

(20) An optical filter containing the glass suitable for chemical strengthening described in any one of (1) to (9), or containing the chemically strengthened glass described in any one of (10) to (18), or containing (19) the glass element.

(21) A device containing the glass suitable for chemical strengthening described in any one of (1) to (9), or containing the chemically strengthened glass described in any one of (10) to (18), or containing (19) The glass element may contain the optical filter described in (20).

The beneficial effects of the present invention are: through reasonable component design, the glass of the present invention is suitable for chemical strengthening while obtaining desired light absorption performance; the chemically strengthened glass obtained by the present invention has excellent near-infrared light absorption performance and strength.

Detailed ways

Hereinafter, embodiments of the glass suitable for chemical strengthening and chemically strengthened glass of the present invention will be described in detail, but the present invention is not limited to the following embodiments, and can be implemented with appropriate changes within the scope of the purpose of the present invention. In addition, although there may be cases where descriptions are appropriately omitted regarding overlapping descriptions, the gist of the invention is not limited thereto.

The glass suitable for chemical strengthening and the range of each component of the chemically strengthening glass according to the present invention will be described below. In this specification, unless otherwise specified, the content of each component is expressed in mole percent relative to the total amount of glass substances in the composition converted into oxides. Here, the "composition in terms of oxides" means that oxides, compound salts, hydroxides, etc. used as raw materials for the glass or chemically strengthened glass composition of the present invention are decomposed and converted into oxides when melted. In the case of , the total molar amount of substances of the oxide is taken as 100%. Herein, glass suitable for chemical strengthening refers to glass that has not undergone chemical strengthening treatment, and is sometimes referred to as glass herein; chemically strengthened glass refers to glass suitable for chemical strengthening that has been chemically strengthened.

Unless otherwise indicated in a specific instance, the numerical ranges set forth herein include the upper and lower values, "above" and "below" include the endpoints, and all integers and fractions within the range, without limitation. Specific values listed when in range. The term "and/or" herein is inclusive, for example, "A and/or B" means only A, or only B, or both A and B.

P ₂ O ₅ is an indispensable component of the glass skeleton in the present invention, which can promote the formation of glass and improve the chemical stability of glass, and at the same time, P ₂ O ₅ can also improve the absorption performance of glass to near-infrared light. If the content of P ₂ O ₅ is lower than 38%, the above effects are insufficient, and the near-infrared absorption function of the glass cannot meet the design requirements, so the lower limit of the content of P ₂ O ₅ is 38%, preferably 40%, more preferably the lower limit 45%. If the content of P ₂ O ₅ exceeds 65%, the tendency of devitrification of the glass increases, so the upper limit of the content of P ₂ O ₅ in the present invention is 65%, preferably 60%, more preferably 55%.

Al ₂ O ₃ is also the main component of glass, which is used to increase the stability of the glass, increase the intrinsic strength of the glass and improve the weather resistance of the glass. The present invention obtains the above-mentioned properties by introducing more than 2% of Al ₂ O ₃ , The lower limit of Al ₂ O ₃ is preferably 5%, more preferably 6%. When the _Al2O3 content exceeds ₁₅ %, the crystallization tendency of the glass increases, and the melting performance of the glass becomes poor, so the upper limit of the _Al2O3 content in the present invention is ₁₅ %, preferably the upper limit is 13%, more preferably the upper limit is 11%.

CuO is an essential component for the glass of the present invention to obtain near-infrared light absorption performance. If the content of CuO is less than 8%, the near-infrared absorption performance of the glass cannot meet the design requirements when the glass is light and thin. In some embodiments of the present invention, by introducing more than 10% of CuO to participate in the formation of the glass network, the chemical stability of the glass can be improved and the coefficient of thermal expansion can be reduced. Therefore, the lower limit of the content of CuO is 8%, preferably 10%, more preferably 14%. If the content of CuO exceeds 25%, the transmittance in the visible light region of the glass will decrease, the valence state of Cu in the glass will change, it will be difficult to obtain the desired light absorption performance, and the resistance to devitrification of the glass will be low. Therefore, the upper limit of the content of CuO in the present invention 25%, preferably the upper limit is 22%, more preferably the upper limit is 20%.

Rn ₂ O (Rn ₂ O is the total content of Li ₂ O, Na ₂ O, and K ₂ O) can reduce the melting temperature and viscosity of the glass, and can promote more Cu to exist in the state of Cu ²⁺ , but with As Rn ₂ O increases, the chemical stability of the glass deteriorates. In the present invention, the above properties are achieved by introducing more than 5% of Rn ₂ O, preferably the lower limit of Rn ₂ O is 8%, more preferably the lower limit is 10%. When the content of Rn ₂ O exceeds 40%, the resistance to devitrification and transition temperature of the glass will decrease, and the formability of the glass will deteriorate. Therefore, the upper limit of the content of Rn ₂ O in the present invention is 40%, preferably the upper limit is 30%, more preferably The upper limit is 25%. In this paper, Rn ₂ O is the total content of Li ₂ O, Na ₂ O, and K ₂ O, which means that Rn ₂ O can be expressed as being composed of any one of Li ₂ O, Na ₂ O, and K ₂ O, or any two of them. A composition, or containing Li ₂ O, Na ₂ O and K ₂ O at the same time.

Li ₂ O exists as an essential component in the present invention, which reduces the melting temperature and viscosity of the glass, making the glass of the present invention suitable for chemical strengthening, while contributing to chemical stability and mechanical strength better than Na ₂ O and K ₂ O, In the present invention, more than 6% of Li ₂ O is preferably introduced. In some embodiments of the present invention, by introducing more than 10% of Li ₂ O, the change of valence state and the reduction of devitrification resistance caused by the introduction of a large amount of CuO can be prevented. But when the Li ₂ O content exceeds 30%, the chemical stability and formability of the glass decrease. Therefore, the lower limit of the _Li2O content is preferably 6%, more preferably 10%, and even more preferably 12%. The upper limit of the _Li2O content is 30%, preferably 22%, more preferably 20%.

Through a large number of experimental studies by the inventors, it has been found that the value of Li ₂ O/Rn ₂ O in the glass of the present invention is in the range of 0.4 to 1.0, which can reduce the density of the glass and improve the devitrification resistance of the glass, preferably Li ₂ O/Rn ₂ The value of O is 0.5 to 1.0; further, by making the value of Li ₂ O/Rn ₂ O in the range of 0.7 to 1.0, the chemical strengthening performance of the glass can be further improved, and the bending strength of the chemically strengthened glass can be improved, so it is more The value of Li ₂ O/Rn ₂ O is preferably 0.7 to 1.0, and the value of Li ₂ O/Rn ₂ O is more preferably 0.8 to 1.0.

In the present invention, by making the value of Li ₂ O/CuO more than 0.3, the valence state change and the reduction of devitrification resistance caused by the introduction of a large amount of CuO can be prevented, and the chemical stability of the glass can be improved, but when Li When the value of ₂ O/CuO exceeds 3.0, the high-temperature viscosity and transition temperature of the glass decrease, and the streakiness of the glass becomes poor. Therefore, the value of _Li2O /CuO is 0.3-3.0, Preferably it is 0.5-2.0, More preferably, it is 0.8-1.5.

In some embodiments of the present invention, by controlling (Li ₂ O+CuO)/P ₂ O ₅ in the range of 0.3 to 1.2, the glass-forming stability and devitrification resistance of the glass can be improved, and the glass can obtain a suitable The degree of abrasion is preferably (Li ₂ O+CuO)/P ₂ O ₅ in the range of 0.4 to 1.0, more preferably (Li ₂ O+CuO)/P ₂ O ₅ in the range of 0.5 to 0.8.

Na ₂ O is a component that improves glass meltability. In the present invention, by making the content of Na ₂ O 10% or less, it is possible to prevent a decrease in the transition temperature while improving the chemical stability of the glass. The Na ₂ O content is preferably 5% or less, more preferably ₂ % or less.

K ₂ O can increase the transmittance of glass in the visible light region, and when its content exceeds 10%, the stability of the glass decreases and the chemical strengthening performance decreases. In some embodiments of the present invention, the content of K ₂ O is less than 2%, so that the glass can obtain excellent devitrification resistance and chemical stability. Therefore, the content of K ₂ O is 10% or less, preferably ₅ % or less, more preferably ₂ % or less.

In some embodiments of the present invention, by keeping the total content of Na ₂ O and K ₂ O (Na ₂ O+K ₂ O) below 10%, the glass can obtain a low melting temperature while maintaining the stability and chemical stability of the glass. The strengthening performance is excellent, preferably Na ₂ O+K ₂ O is less than 8%, more preferably Na ₂ O+K ₂ O is less than 5%.

The introduction of more than 1% RO in the present invention (RO is the total content of MgO, CaO, SrO, and BaO) can be used to reduce the melting temperature of the glass and improve the glass-forming stability and strength of the glass. The lower limit of the preferred RO content is 2%. More preferably, the lower limit is 4%. When the RO content exceeds 30%, the devitrification resistance of the glass decreases, and at the same time, the chemical strengthening performance of the glass decreases. Therefore, the upper limit of the RO content in the present invention is 30%, preferably 25%, and more preferably 20%. In this paper, RO is the total content of MgO, CaO, SrO, and BaO, which means that RO can be expressed as being composed of any one of MgO, CaO, SrO, and BaO, or any two, or any three, or simultaneously Contains MgO, CaO, SrO and BaO.

The introduction of more than 1% MgO in the present invention can reduce the melting temperature of the glass and improve the processability of the glass. Therefore, the lower limit of the content of MgO is 1%, preferably 2%, more preferably 4%. If the amount of MgO introduced exceeds 15%, the devitrification resistance of the glass will decrease, so the upper limit of the MgO content is 15%, preferably 12%, more preferably 10%.

CaO is an optional component in the present invention. By introducing 8% or less of CaO, the reduction of anti-devitrification performance can be prevented while reducing high-temperature viscosity. The content of CaO is preferably 5% or less, more preferably 3% or less.

SrO is an optional component in the present invention. By introducing 8% or less of SrO, the reduction of chemical stability and devitrification resistance of the glass can be prevented. The content of SrO is preferably 5% or less, more preferably 3% or less.

BaO can increase the transmittance of the glass in the visible light region, and improve the glass-forming stability and strength of the glass. If its content exceeds 10%, the density of the glass will increase. In some embodiments of the present invention, by making the content of BaO more than 0.5%, the chemical stability of the glass can be improved and the thermal expansion coefficient of the glass can be reduced. Therefore, the content of BaO is 10% or less, preferably 0.5 to 8%, more preferably 1 to 6%.

In some embodiments of the present invention, by making the value of BaO/MgO above 0.05, the glass can obtain a lower coefficient of thermal expansion and excellent chemical stability, and improve the high temperature viscosity of the glass; if the value of BaO/MgO exceeds 5.0 , the density of the glass increases and the processability decreases. Therefore, the value of BaO/MgO is preferably 0.05 to 5.0, more preferably 0.1 to 3.0, and still more preferably 0.15 to 1.0.

In some embodiments of the present invention, by keeping the value of RO/CuO below 2.0, the glass can easily obtain the desired transition temperature and hardness while ensuring a low thermal expansion coefficient, and the value of RO/CuO is preferably 0.2 to 1.5, more preferably 0.3 to 1.0.

The introduction of more than 0.01% V ₂ O ₅ in the present invention can promote the stable existence of CuO in the glass as Cu ²⁺ , improve the near-infrared light absorption performance of the glass, and at the same time improve the crystallization resistance and chemical strengthening performance of the glass. If V When the ₂ O ₅ content exceeds 3%, the absorption of the glass in the visible light region is enhanced. Therefore, the content of V ₂ O ₅ in the present invention is 0.01-3%, preferably 0.05-2%, more preferably 0.1-1%.

A large number of experimental studies by the inventors found that in the present invention, by controlling the ratio 10×V ₂ O ₅ /Li ₂ O of the weight content of 10 parts of V ₂ O ₅ to 1 part of Li ₂ O in the range of 0.02 to 3.0, The near-infrared light absorption performance of the glass can be improved, and the decrease in transmittance in the visible light region can be suppressed. Therefore, the value of 10×V ₂ O ₅ /Li ₂ O is 0.02-3.0, preferably 0.05-2.0. Further, controlling 10×V ₂ O ₅ /Li ₂ O in the range of 0.1 to 0.8 can also improve the devitrification resistance and chemical strengthening performance of the glass, and improve the strength of the glass. Therefore, 10×V ₂ O ₅ is more preferred /Li ₂ O is 0.1 to 0.8.

By adding an appropriate amount of _SiO2 to the glass, the formation of glass can be promoted and the chemical stability of the glass can be improved. When the content exceeds 10%, the melting property of the glass becomes poor, and unmelted impurities are easily formed in the glass. At the same time, the glass’s Near-infrared light absorption characteristics tend to decrease. Therefore, the content of SiO ₂ is 0-10%, preferably 0-5%, more preferably 0-2%, and even more preferably no SiO ₂ is introduced.

Adding a small amount of ZrO2 to the glass can improve the anti _- devitrification ability of the glass and enhance the chemical stability of the glass at the same time. However, if its content exceeds 10%, the melting performance of the glass will be significantly reduced, and at the same time, the high-temperature viscosity of the glass will be significantly increased, and infusible matter will easily appear in the glass. Therefore, the ZrO ₂ content is limited to 0 to 10%, preferably 0 to 5%, more preferably 0 to 2%, and it is further preferable not to introduce ZrO ₂ .

Ln ₂ O ₃ (Ln ₂ O ₃ is one or more of La ₂ O ₃ , Gd ₂ O ₃ , Y ₂ O ₃ , Yb ₂ O ₃ ) can increase the refractive index of the glass and maintain low dispersion, but When the content of Ln ₂ O ₃ exceeds 10%, the melting temperature of the glass increases and the chemical stability decreases. Therefore, the content of Ln ₂ O ₃ is 0-10%, preferably 0-5%, more preferably 0-2%, and even more preferably no Ln ₂ O ₃ is introduced.

F can reduce the melting temperature of glass, but its introduction will cause volatilization during the glass melting process, pollute the environment, and the glass is easy to form streaks, so it is preferable not to introduce F. In some embodiments, even a small amount of Fe will deteriorate the devitrification resistance of the glass, so it is preferable not to introduce Fe. In order to obtain excellent chemical stability and near-infrared light absorption performance, B ₂ O ₃ and ZnO are preferably not introduced in the present invention.

_In the _{present invention} , glass and chemically _{strengthened glass} can be made to have _{desired spectral} At the same time, it has excellent devitrification resistance, chemical stability and low thermal expansion coefficient. The total content of P ₂ O ₅ , Al ₂ O ₃ , CuO, Li ₂ O, V ₂ O ₅ , MgO, and BaO is preferably 97% or more, more preferably P ₂ O ₅ , Al ₂ O ₃ , CuO, and Li ₂ O The total content of , V ₂ O ₅ , MgO and BaO is 98% or more.

The "do not introduce", "do not contain" and "0%" described herein mean that the compound, molecule or element, etc. is not intentionally added as a raw material to the glass or chemically strengthened glass suitable for chemical strengthening of the present invention; For chemically strengthened glass or chemically strengthened glass raw materials and/or equipment, there will be some impurities or components that are not intentionally added, and will be contained in small or trace amounts in the final chemically strengthened glass or chemically strengthened glass, This kind of situation is also within the protection scope of the patent of the present invention.

[Manufacturing method]

The manufacturing method of the glass of the present invention is as follows: the glass of the present invention is produced by using conventional raw materials and conventional processes, using carbonates, nitrates, phosphates, metaphosphates, sulfates, hydroxides, oxides, etc. as raw materials. Method After batching, put the prepared charge into a smelting furnace at 1000-1200°C for melting, and after clarification, stirring and homogenization, a homogeneous molten glass without bubbles and undissolved substances is obtained, which is melted Glass is cast in molds and annealed. Those skilled in the art can properly select raw materials, process methods and process parameters according to actual needs.

The glass of the present invention can be shaped by a known method. In some embodiments, the glasses described herein can be fabricated into shaped bodies, including but not limited to sheets, by a variety of processes including, but not limited to, slot drawing, float, rolling and other sheet forming processes known in the art. Alternatively, the glass may be formed by float or roll methods as are known in the art.

The glass of the present invention can be manufactured into a sheet glass molded body by methods such as grinding or buffing, but the method of manufacturing the glass molded body is not limited to these methods.

The glasses described herein can have any thickness that is reasonably useful.

The glass of the present invention can be made into chemically strengthened glass by forming a compressive stress layer to obtain higher strength.

In some embodiments, the glass can be processed into sheets and then chemically strengthened through a chemical strengthening process.

The chemical strengthening in the present invention includes ion exchange method. The glass of the present invention can be ion-exchanged by methods known in the art. During ion exchange, smaller metal ions in the glass are replaced or "exchanged" by larger metal ions of the same valence state close to the glass. Replacing smaller ions with larger ions builds compressive stress in the glass, forming a compressive stress layer.

In some embodiments, the metal ion is a monovalent alkali metal ion (e.g., Na ⁺ , K ⁺ , Rb ⁺ , Cs ⁺ , etc.), and the ion exchange is performed by submerging the glass in at least one molten salt containing larger metal ions. In the bath, the larger metal ions are used to replace the smaller metal ions in the glass. Alternatively, other monovalent metal ions such as Ag ⁺ , Tl ⁺ , Cu ⁺ etc. can also be used to exchange monovalent ions. The one or more ion exchange processes used to chemically strengthen the glass may include, but are not limited to, immersing it in a single salt bath, or immersing it in multiple salt baths of the same or different with washing and/or annealing steps in between.

In some embodiments, the chemical strengthening method of the present invention also includes chemical etching. The glass is placed in a certain temperature and a certain concentration of NaOH and/or KOH solution for chemical corrosion, and its mechanical properties are enhanced by passivating the residual microcracks in glass processing.

In some embodiments, there is an ion implantation method of implanting ions into the surface layer of the glass, and a thermal tempering method of heating the glass and then rapidly cooling it.

Next, the properties of the glass suitable for chemical strengthening or the chemically strengthened glass of the present invention will be described.

<transition temperature>

The glass suitable for chemical strengthening or the transition temperature (T _g ) of chemically strengthened glass shall be tested according to the method specified in GB/T7962.16-2010.

The transition temperature (T _g ) of the glass suitable for chemical strengthening or the chemically strengthened glass of the present invention is 405°C or higher, preferably 410°C or higher, more preferably 415 to 450°C.

<Crystalization upper limit temperature>

Use gradient temperature furnace method to measure crystallization properties of glass or chemically strengthened glass suitable for chemical strengthening. Glass or chemically strengthened glass is made into 180*10*10mm sample, polished on the side, placed in a temperature gradient (5°C/ cm) to 1400°C for 4 hours, take it out and cool it down to room temperature naturally, observe the crystallization of glass or chemically strengthened glass under a microscope, the highest temperature corresponding to the crystallization of glass or chemically strengthened glass is glass or chemically strengthened glass crystallization upper limit temperature.

The crystallization upper limit temperature of the glass suitable for chemical strengthening or the chemically strengthened glass of the present invention is 1050°C or lower, preferably 1040°C or lower, more preferably 1030°C or lower.

<density>

The density (ρ) of glass suitable for chemical strengthening or chemically strengthened glass shall be tested according to the method specified in GB/T7962.20-2010.

The glass suitable for chemical strengthening or the chemically strengthened glass of the present invention has a density (ρ) of 3.1 g/cm ³ or less, preferably 3.0 g/cm ³ or less, more preferably 2.9 g/cm ³ or less.

<Thermal expansion coefficient>

The thermal expansion coefficient (α _20～120°C ) of glass suitable for chemical strengthening or chemically strengthened glass shall be tested according to the method specified in GB/T7962.16-2010.

The thermal expansion coefficient (α _{20 to 120°C} ) of the glass suitable for chemical strengthening or the chemically strengthening glass of the present invention is 98×10 ^-7 /K or less, preferably 93×10 ^-7 /K or less, more preferably 90×10 ^-7 /K below.

<spectral transmittance>

The spectral transmittance of the glass suitable for chemical strengthening or the chemically strengthened glass according to the present invention refers to the value obtained by means of a spectrophotometer in the stated manner: assuming that the glass suitable for chemical strengthening or the chemically strengthened glass samples have parallel and optically polished Two planes, light is incident vertically from one parallel plane, and emerges from the other parallel plane, the intensity of the outgoing light divided by the intensity of the incident light is the transmittance, which is also called the external transmittance.

When the glass suitable for chemical strengthening or the thickness of chemically strengthened glass is 0.11mm, the spectral transmittance has the characteristics shown below:

The spectral transmittance at a wavelength of 400 nm is 73% or more, preferably 76% or more, more preferably 78% or more.

The spectral transmittance at a wavelength of 1100 nm is 15% or less, preferably 13% or less, more preferably 10% or less.

When the glass suitable for chemical strengthening or the thickness of chemical strengthening glass is 0.11 mm, the wavelength (λ ₅₀ ) at which the spectral transmittance reaches 50% is in the range of 622-650 nm, more preferably in the range of 628-645 nm, more preferably in the range of 630 nm ~640nm.

<Bending strength>

The flexural strength of the chemically strengthened glass of the present invention is suitable for testing by using a computer-controlled electronic universal testing machine (model: CMT6502) at room temperature and using a three-point method. The three-point bending strength test refers to the maximum bending stress when the sample is placed on two fulcrums with a certain distance, and a point in the center of the fulcrum is loaded with a load.

Calculation of flexural strength:

Three-point bending strength:

Where σ _(3.L) : Three-point bending strength (MPa);

L: the span between the two lower fulcrums (mm);

F: The maximum bending stress (N) when the sample breaks;

W: the width of the sample (mm);

t: thickness (mm) of the sample.

The chemically strengthened glass of the present invention is made into 50mm*20mm*0.11mm (length*width*thickness), and the test conditions are as follows: the diameter of the indenter is Ф6mm; the pressing speed is 1mm/min; the span is 30mm.

The flexural strength (σ) of the chemically strengthened glass is 400 MPa or more, preferably 450 MPa or more, more preferably 500 MPa or more, and still more preferably 520 to 700 MPa.

[glass element]

The glass element related to the present invention includes the above-mentioned glass suitable for chemical strengthening or chemically strengthened glass, and examples thereof include thin plate-shaped glass elements or lenses used in near-infrared light absorption filters, and are suitable for solid-state imaging. For the color correction of components, it has various excellent properties of the above-mentioned chemically strengthened glass or chemically strengthened glass.

Moreover, the thickness of the glass element (the distance between the incident surface and the outgoing surface of the transmitted light) is determined by the transmittance characteristics of the element, preferably between 0.05 and 0.5 mm, more preferably between 0.08 and 0.3 mm, and even more preferably Determined between 0.1-0.2mm, the wavelength (λ ₅₀ ) at which the spectral transmittance reaches 50% is in the range of 622-650nm, preferably in the range of 628-645nm, more preferably in the range of 630-640nm. In order to obtain such a glass element, the composition of the glass is adjusted, and it is processed into an element having the thickness of the above-mentioned spectral characteristics.

[filter]

The optical filter related to the present invention is a near-infrared filter, which contains the above-mentioned glass suitable for chemical strengthening or chemically strengthened glass, or contains the above-mentioned glass element, has a color correction function, and also has the above-mentioned glass suitable for chemical strengthening. Or various excellent properties of chemically strengthened glass.

[equipment]

The present invention is suitable for chemically strengthened glass or chemically strengthened glass, or glass components, or optical filters can be produced by well-known methods such as portable communication devices (such as mobile phones), smart wearable devices, photographic devices, video recording devices, display devices and monitoring devices. equipment etc.

Example

<Glass Suitable for Chemical Strengthening and Examples of Chemically Strengthened Glass>

In order to further clearly illustrate and illustrate the technical solution of the present invention, the following non-limiting examples are provided.

In this example, glass having the compositions shown in Tables 1 to 3 was obtained by using the above-mentioned glass manufacturing method. In addition, the properties of each glass were measured by the test method described in the present invention, and the measurement results are shown in Tables 1 to 3.

Table 1

Table 2

table 3

The glass made in the examples described in the above Tables 1 to 3 was processed into a glass sheet with a thickness of 0.11 mm, and the spectral transmittance of the glass of each example was measured according to the test method described above, and the results are shown in Table 4 ~ Table 6.

Table 4

Example 1 2 3 4 5 6 7 8 9 10 λ₅₀(nm) 630 631 628 625 633 635 632 634 630 633 τ₄₀₀(%) 75.5 78.2 77.5 79.3 78.8 79.2 77.4 77.0 76.4 80.2 τ₁₁₀₀(%) 11.4 10.3 9.7 9.2 9.5 8.8 10.0 10.2 9.8 8.5

table 5

Example 11 12 13 14 15 16 17 18 19 20 λ₅₀(nm) 632 631 634 635 633 629 630 627 630 635 τ₄₀₀(%) 78.5 81.4 82.2 80.3 79.4 77.2 78.5 85.0 81.4 78.2 τ₁₁₀₀(%) 9.3 8.7 8.2 9.1 10.0 10.2 9.5 8.3 8.6 9.7

Table 6

Chemically strengthen the glass examples described in the above Tables 4 to 6 according to the chemical strengthening method described above to form chemically strengthened glass, and test the strength of each chemically strengthened glass according to the test method for flexural strength described above. Bending strength, the results are shown in Table 7 to Table 9 below.

Table 7

Example 1 2 3 4 5 6 7 8 9 10 σ(MPa) 525 527 510 530 524 550 548 516 536 530

Table 8

Example 11 12 13 14 15 16 17 18 19 20 σ(MPa) 545 570 562 505 550 517 554 542 518 560

Table 9

Example twenty one twenty two twenty three twenty four 25 26 27 28 29 30 σ(MPa) 534 550 545 540 550 552 547 546 558 560

<Example of glass element>

The glass and/or chemically strengthened glass of Examples 1 to 30 described above are made into a glass element by a method known in the art, for example, a thin plate-shaped glass element used in a near-infrared light absorption filter or Lenses, etc., are suitable for color correction of solid-state imaging devices, and have various excellent properties of the above-mentioned glass or chemically strengthened glass.

<Example of filter>

The glass and/or chemically strengthened glass and/or glass elements of Examples 1 to 30 described above are made into optical filters by methods known in the art. The optical filter of the present invention has a color correction function and also has the above-mentioned glass Or various excellent properties of chemically strengthened glass.

<device embodiment>

The glass or chemically strengthened glass and/or glass components and/or optical filters of the present invention can be manufactured by well-known methods such as portable communication devices (such as mobile phones), smart wearable devices, photographic devices, camera devices, display devices and monitoring devices, etc. . It can also be used, for example, in imaging devices, sensors, microscopes, medical technology, digital projection, optical communication technology/information transmission, or in camera devices and devices in the automotive sector.

Claims (21)

1. being suitable for the glass of chemical strengthening, which is characterized in that its component in mole percent, contains: P₂O₅: 38~65%； Al₂O₃: 2~15%；CuO:8~25%；Li₂O:6~30%；V₂O₅: 0.01~3%；MgO:1~15%；BaO:0~10%, Wherein 10 × V₂O₅/Li₂O is 0.02~3.0, Li₂O/CuO is 0.3~3.0.

2. the glass according to claim 1 suitable for chemical strengthening, which is characterized in that its component is with molar percentage table Show, also contain: Na₂O+K₂O is 10% or less；CaO:0~8%；SrO:0~8%；SiO₂: 0~10%；Ln₂O₃: 0~10%； ZrO₂: 0~10%, wherein Ln₂O₃For La₂O₃、Gd₂O₃、Y₂O₃、Yb₂O₃One of or it is a variety of.

3. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that its component is with molar percentage It indicates, each component meets one or more of following 7 kinds of situations:

1)Li₂O/Rn₂O is 0.4~1.0, preferably Li₂O/Rn₂O is 0.5~1.0, more preferable Li₂O/Rn₂O is 0.7~1.0, into The preferred Li of one step₂O/Rn₂O is 0.8~1.0；

2) BaO/MgO is 0.05~5.0, and preferably BaO/MgO is 0.1~3.0, and more preferable BaO/MgO is 0.15~1.0；

3)Li₂O/CuO is 0.5~2.0, preferably Li₂O/CuO is 0.8~1.5；

4)Na₂O+K₂O is 8% hereinafter, it is preferred that Na₂O+K₂O is 5% or less；

5)(Li₂O+CuO)/P₂O₅It is 0.3~1.2, preferably (Li₂O+CuO)/P₂O₅It is 0.4~1.0, more preferable (Li₂O+CuO)/ P₂O₅It is 0.5~0.8；

6)10×V₂O₅/Li₂O is 0.05~2.0, preferably 10 × V₂O₅/Li₂O is 0.1~0.8；

7) RO/CuO is 2.0 hereinafter, it is preferred that RO/CuO is 0.2~1.5, and more preferable RO/CuO is 0.3~1.0,

Wherein, Rn₂O is Li₂O、Na₂O、K₂Total content of O, total content of RO MgO, CaO, SrO, BaO.

4. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that its component is with molar percentage It indicates, contains: P₂O₅: 40~60%, preferably P₂O₅: 45~55%；And/or Al₂O₃: 5~13%, preferably Al₂O₃: 6~11%； And/or CuO:10~22%, preferred CuO:14~20%；And/or Li₂O:10~22%, preferably Li₂O:12~20%；And/or V₂O₅: 0.05~2%, preferably V₂O₅: 0.1~1%；And/or MgO:2~12%, preferred MgO:4~10%；And/or BaO:0.5 ~8%, preferably BaO:1~6%；And/or CaO:0~5%, preferred CaO:0~3%；And/or SrO:0~5%, preferably SrO:0 ~3%；And/or SiO₂: 0~5%, preferably SiO₂: 0~2%；And/or Ln₂O₃: 0~5%, preferably Ln₂O₃: 0~2%；And/or ZrO₂: 0~5%, preferably ZrO₂: 0~2%, wherein Ln₂O₃For La₂O₃、Gd₂O₃、Y₂O₃、Yb₂O₃One of or it is a variety of.

5. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that its component is with molar percentage It indicates, P₂O₅、Al₂O₃、CuO、Li₂O、V₂O₅, MgO and BaO total content be 95% or more, preferably P₂O₅、Al₂O₃、CuO、 Li₂O、V₂O₅, MgO and BaO total content be 97% or more, more preferable P₂O₅、Al₂O₃、CuO、Li₂O、V₂O₅, MgO and BaO Total content is 98% or more.

6. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that do not contain B in its component₂O₃； And/or ZnO is not contained；And/or F is not contained；And/or Fe is not contained.

7. according to claim 1 or 2 any glass suitable for chemical strengthening, which is characterized in that the crystallization of the glass Ceiling temperature is for 1050 DEG C hereinafter, preferably 1040 DEG C hereinafter, more preferably 1030 DEG C or less；And/or transition temperature T_gIt is 405 DEG C or more, preferably 410 DEG C or more, more preferably 415~450 DEG C；And/or density p is 3.1g/cm³Hereinafter, preferably 3.0g/cm³Hereinafter, more preferably 2.9g/cm³Below；And/or thermalexpansioncoefficientα_20-120℃It is 98 × 10^-7/ K is hereinafter, preferably 93×10^-7/ K is hereinafter, more preferably 90 × 10^-7/ K or less.

8. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that the glass of 0.11mm thickness it is saturating Corresponding wavelength X when crossing rate up to 50%₅₀For 622~650nm, preferably 628~645nm, more preferably 630~640nm.

9. the glass according to claim 1 or 2 suitable for chemical strengthening, which is characterized in that the glass 400nm of 0.11mm thickness The transmitance τ at place₄₀₀It is 73% or more, preferably 76% or more, more preferably 78% or more；And/or the transmitance at 1100nm τ₁₁₀₀For 15% hereinafter, preferably 13% hereinafter, more preferably 10% or less.

10. chemically reinforced glass, which is characterized in that its component in mole percent, contains: P₂O₅: 38~65%；Al₂O₃: 2~15%；CuO:8~25%；Li₂O:6~30%；V₂O₅: 0.01~3%；MgO:1~15%；BaO:0~10%；Na₂O+ K₂O is 10% or less；CaO:0~8%；SrO:0~8%；SiO₂: 0~10%；Ln₂O₃: 0~10%；ZrO₂: 0~10%, In 10 × V₂O₅/Li₂O is 0.02~3.0, Li₂O/CuO is 0.3~3.0, Ln₂O₃For La₂O₃、Gd₂O₃、Y₂O₃、Yb₂O₃In one Kind is a variety of.

11. chemically reinforced glass according to claim 10, which is characterized in that its component in mole percent, respectively Component meets one or more of following 7 kinds of situations:

1)Li₂O/Rn₂O is 0.4~1.0, preferably Li₂O/Rn₂O is 0.5~1.0, more preferable Li₂O/Rn₂O is 0.7~1.0, into The preferred Li of one step₂O/Rn₂O is 0.8~1.0；

2) BaO/MgO is 0.05~5.0, and preferably BaO/MgO is 0.1~3.0, and more preferable BaO/MgO is 0.15~1.0；

3)Li₂O/CuO is 0.5~2.0, preferably Li₂O/CuO is 0.8~1.5；

4)Na₂O+K₂O is 8% hereinafter, it is preferred that Na₂O+K₂O is 5% or less；

5)(Li₂O+CuO)/P₂O₅It is 0.3~1.2, preferably (Li₂O+CuO)/P₂O₅It is 0.4~1.0, more preferable (Li₂O+CuO)/ P₂O₅It is 0.5~0.8；

6)10×V₂O₅/Li₂O is 0.05~2.0, preferably 10 × V₂O₅/Li₂O is 0.1~0.8；

7) RO/CuO is 2.0 hereinafter, it is preferred that RO/CuO is 0.2~1.5, and more preferable RO/CuO is 0.3~1.0,

Wherein, Rn₂O is Li₂O、Na₂O、K₂Total content of O, total content of RO MgO, CaO, SrO, BaO.

12. chemically reinforced glass according to claim 10, which is characterized in that its component in mole percent, contains Have: P₂O₅: 40~60%, preferably P₂O₅: 45~55%；And/or Al₂O₃: 5~13%, preferably Al₂O₃: 6~11%；And/or CuO:10~22%, preferably CuO:14~20%；And/or Li₂O:10~22%, preferably Li₂O:12~20%；And/or V₂O₅: 0.05~2%, preferably V₂O₅: 0.1~1%；And/or MgO:2~12%, preferred MgO:4~10%；And/or BaO:0.5~ 8%, preferably BaO:1~6%；And/or CaO:0~5%, preferred CaO:0~3%；And/or SrO:0~5%, preferably SrO:0~ 3%；And/or SiO₂: 0~5%, preferably SiO₂: 0~2%；And/or Ln₂O₃: 0~5%, preferably Ln₂O₃: 0~2%；And/or ZrO₂: 0~5%, preferably ZrO₂: 0~2%, wherein Ln₂O₃For La₂O₃、Gd₂O₃、Y₂O₃、Yb₂O₃One of or it is a variety of.

13. chemically reinforced glass according to claim 10, which is characterized in that its component in mole percent, P₂O₅、Al₂O₃、CuO、Li₂O、V₂O₅, MgO and BaO total content be 95% or more, preferably P₂O₅、Al₂O₃、CuO、Li₂O、 V₂O₅, MgO and BaO total content be 97% or more, more preferable P₂O₅、Al₂O₃、CuO、Li₂O、V₂O₅, MgO and BaO it is total Content is 98% or more.

14. chemically reinforced glass according to claim 10, which is characterized in that do not contain B in its component₂O₃；And/or not Contain ZnO；And/or F is not contained；And/or Fe is not contained.

15. chemically reinforced glass according to claim 10, which is characterized in that the crystallization ceiling temperature of the glass is 1050 DEG C hereinafter, preferably 1040 DEG C hereinafter, more preferably 1030 DEG C or less；And/or transition temperature T_gIt is 405 DEG C or more, it is excellent It is selected as 410 DEG C or more, more preferably 415~450 DEG C；And/or density p is 3.1g/cm³Hereinafter, preferably 3.0g/cm³Hereinafter, More preferably 2.9g/cm³Below；And/or thermalexpansioncoefficientα_20-120℃It is 98 × 10^-7/ K is hereinafter, preferably 93 × 10^-7/ K with Under, more preferably 90 × 10^-7/ K or less.

16. chemically reinforced glass according to claim 10, which is characterized in that the transmitance of the glass of 0.11mm thickness reaches Corresponding wavelength X when 50%₅₀For 622~650nm, preferably 628~645nm, more preferably 630~640nm.

17. chemically reinforced glass according to claim 10, which is characterized in that saturating at the glass 400nm of 0.11mm thickness Cross rate τ₄₀₀It is 73% or more, preferably 76% or more, more preferably 78% or more；And/or the transmitance τ at 1100nm₁₁₀₀For 15% hereinafter, preferably 13% hereinafter, more preferably 10% or less.

18. chemically reinforced glass according to claim 10, which is characterized in that the bending strength σ of the glass of 0.11mm thickness For 400MPa or more, preferably 450MPa or more, more preferably 500MPa or more, further preferably 520~700MPa.

19. glass elements, which is characterized in that containing any glass suitable for chemical strengthening of claim 1~9, or contain It has the right to require 10~18 any chemically reinforced glass.

20. optical filter, which is characterized in that containing any glass suitable for chemical strengthening of claim 1~9, or contain Any chemically reinforced glass of claim 10~18, or contain the glass elements described in claim 19.

21. a kind of equipment, which is characterized in that containing any glass suitable for chemical strengthening of claim 1~9, or contain It has the right to require 10~18 any chemically reinforced glass, or containing the glass elements described in claim 19, or contains Optical filter described in claim 20.