CN106830685A - A kind of glaze compositions - Google Patents

Abstract

The invention provides a kind of glaze compositions, belong to ceramic product technical field, its raw material for including following weight portion：7~10 parts of Longyan kaolin, 38~42 parts of potassium feldspar, 25~30 parts of quartz, 18~22 parts of wollastonite, 1.02~2.1 parts of 0.5~2 part of bone ash and colorant, glaze of the invention viscosity in sintering process is high, mobility is low, avoid sagging, the defect of the uniform irregular colour one of glaze paint became uneven caused by massed glaze, and the method for cooking reduction temperature point and high temperature firing range of glaze of the present invention are wider, advantageously ensure that the qualification rate of product, in addition, the present invention fires the ceramic for obtaining, its glaze paint glossiness is high, pure color, beautiful appearance, meaning is long.

Description

a glaze composition

technical field

The invention belongs to the technical field of ceramic products, and in particular relates to a glaze composition.

Background technique

Glaze is a glass-like thin layer covering the surface of the ceramic body. After coating the prepared glaze slurry on the surface of the body and calcining at a high temperature, it will melt and spread out, and form a glass-like thin layer and body after cooling. body together. The role of glaze is to improve the appearance quality of ceramic products, improve the technology and performance of products, endow products with smooth and bright surfaces, increase the beauty of products and protect the underglaze decoration. The ceramic industry attaches great importance to the adoption of advanced glaze technology. A large number of professional ceramic glaze and ceramic frit companies have emerged in China, and the glazes used in ceramic products are becoming more and more abundant. For example, Chinese patent document CN 105461226A discloses a kind of all-raw crystal thick cast glaze, which is composed of the following components by weight percentage: 20%-25% of potassium feldspar, 10%-15% of albite %, wollastonite 20%-25%, talc 10%-15%, kaolin 7%-10%, quartz powder 6%-9%, zinc oxide 6%-8%, barium carbonate 8%-12%, green 1% to 5% of pillar stones, the glaze liquid of the above-mentioned technology is clear, has good exhaust performance, the glaze surface is clear and transparent, and has good aesthetics.

But above-mentioned technology has added beryl in its formula, because beryl contains natural mineral rare metal beryllium, greatly reduces the high-temperature viscosity of above-mentioned glaze material in melting process. As we all know, the viscosity of glaze is low, the fluidity is fast, and it is easy to cause defects such as flow glaze and piled glaze, and it is easy to hang down when melting at high temperature, which is inconvenient to apply thickly.

In addition, if the viscosity of the glaze is too small, it is easy to produce color difference at the edges and corners of ceramic products, especially the color difference of special-shaped and large-scale products is particularly obvious. This is because the ceramic glaze is in a glass rheological state at high temperature. It will move down along the surface of the product, causing the thickness of the glaze to be uneven, making the place where the glaze layer is thicker have a darker color, and the place where the glaze layer is thinner is lighter, causing the overall color of the product to be uneven and form a color difference. The more times, the more obvious the color difference.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the defects of glazes in the prior art, such as low viscosity at high temperature and fast fluidity, which cause glaze flow and piled glaze, resulting in uneven thickness and uneven color of the glaze surface, and then provide a Glaze composition with high viscosity at high temperature and low fluidity.

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

A glaze composition, comprising the following raw materials in parts by weight: 7-10 parts of Longyan kaolin, 38-42 parts of potassium feldspar, 25-30 parts of quartz, 18-22 parts of wollastonite, 0.5-2 parts of ashes and color Ingredients 1.02 to 2.1 parts.

The coloring material comprises 1-2 parts of ferric oxide and 0.02-0.1 part of cobalt oxide.

Based on the total mass of the glaze composition, the following raw materials are included in the mass percentage,

Longyan kaolin 7-10%, potassium feldspar 38-42%, quartz 25-30%, wollastonite 18-22%, bone ash 0.5-2%, ferric oxide 1-2% and cobalt oxide 0.02-0.1% .

Based on the total mass of the glaze composition, the following raw materials are included in the mass percentage,

Longyan kaolin 8.85%, feldspar 40.34%, quartz 27.55%, wollastonite 20.66%, bone ash 0.98%, ferric oxide 1.57% and cobalt oxide 0.05%.

A glaze fired from the above glaze composition.

A translucent light blue glaze fired from the above glaze composition.

A method for firing glaze with the above-mentioned glaze composition, comprising the following steps:

(1) Preparation of glaze slurry

Put the glaze raw material, high alumina ball stone and water accurately weighed according to the weight percentage into a ball mill, ball mill, the particle fineness is 0.2% of the 10,000-hole sieve, mix and stir evenly to make a glaze slurry;

(2) Glazing

Apply the glaze slurry evenly on the surface of the body, the thickness of the glaze layer is 0.5mm ~ 1mm, and dry it;

(3) Firing

Put the glazed and dried green body into the reduction gas kiln, the reduction temperature is 980 ° C ~ 1020 ° C, the time is 3 ~ 4 hours, and then fired in the reducing atmosphere for 1 ~ 7 hours, the temperature is raised to 1280 ° C ~ 1310 ° C, and in the Keep the temperature for 10 minutes at the highest firing temperature, and when the temperature in the kiln drops to room temperature, take out the fired green body to obtain the glaze.

The mass ratio of the glaze raw material, high alumina ball stone and water is 1:2:0.8; the ball milling time is 30min, and the rotation speed is 450r/min.

The technical scheme of the present invention has the following advantages:

(1) The glaze composition of the present invention includes the following raw materials in parts by weight, 7-10 parts of Longyan kaolin, 38-42 parts of potassium feldspar, 25-30 parts of quartz, 18-22 parts of wollastonite, bone ash 0.5-2 parts and 1.02-2.1 parts of pigment, kaolin in the glaze composition of the present invention can increase the viscosity of the glaze; potassium feldspar can reduce the melting point of the glaze; quartz can increase the viscosity of the glaze and reduce the high-temperature flow of the glaze It can reduce the thermal expansion coefficient, improve the mechanical properties of the glaze, and improve the stability and stability of the glaze; wollastonite can reduce the firing temperature, shorten the firing time, reduce the occurrence of pinholes in the glaze surface and improve the quality of the glaze surface; ashes can Provide trace elements to improve the glaze effect, such as the introduction of phosphorus pentoxide can make the glaze more jade texture, the Longyan kaolin, feldspar, quartz, wollastonite and bone ash in the glaze composition provided by the invention form the foundation together Glaze, respectively adjust the melting temperature, meltability, fluxing property, stability, fluidity and viscosity of the glaze, so that the glaze of the present invention has the advantages of high viscosity at high temperature and low fluidity. The coloring material of the present invention includes ferric oxide and cobalt oxide, and the ferric oxide and cobalt oxide are used as coloring agents to adjust the background glaze color.

The glaze composition of the present invention has a simple formula and a reasonable proportion, so that the firing range of the glaze is wide, which is conducive to ensuring the qualified rate of the product and reducing the firing cost; The finished glaze is between transparent and opaque glazes, and has higher ornamental value; in addition, the present invention adds bone ash to the glaze formula, so that the glaze fired from the glaze composition of the present invention, Its jade texture is extremely strong, the enamel is warm and moist, and the luster is soft.

More importantly, the ceramic products prepared by using the glaze composition of the present invention have high glaze gloss, pure color, beautiful appearance and long implication; in addition, the glaze of the present invention has high viscosity and good fluidity during firing. Low, avoiding the defects of flowing glaze, piled glaze, uneven thickness of glaze surface and uneven color.

(2) The method for firing the glaze composition of the present invention is prepared by using Longyan kaolin, feldspar, quartz, wollastonite, bone ash and pigment with a specific composition in a specific weight ratio, prepared by water The glaze slurry is glazed on the surface of the green body, fired at a high temperature with a reducing flame, and kept at a slightly high temperature, and can be fired to obtain a ceramic product with a translucent glaze, and the ideal glaze slurry can be obtained without preparing a frit, and this In the firing method of the invention, the reduction temperature point and the high-temperature firing temperature range are relatively wide, which is beneficial to ensure the qualified rate of the product.

detailed description

The technical solutions of the present invention will be clearly and completely described below, and obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example 1

The firing method of the translucent light blue glaze provided by the present embodiment comprises the following steps:

(1) Preparation of glaze slurry

Accurately weigh the following glaze raw materials: 8.85g of Longyan kaolin, 40.34g of potassium feldspar, 27.55g of quartz, 20.66g of wollastonite, 0.98g of bone ash, 1.57g of ferric oxide, and 0.05g of cobalt oxide. Put alumina ball stone and water into the ball mill, the glaze raw material: high alumina ball stone: water mass ratio is 1:2:0.8, ball milling time is 30min, speed is 450r/min, particle fineness is 0.2 million hole sieve %, mix and stir evenly to make glaze slurry.

(2) Glazing

Apply the glaze slurry evenly on the surface of the high white clay body, the thickness of the glaze layer is 0.75mm, and let it dry.

(3) Firing

Put the glazed and dried high white mud body into a reducing gas kiln, reduce it at 1000°C for 3.5 hours, then fire it in a reducing atmosphere for 3 hours and raise the temperature to 1290°C, and keep it at this temperature for 10 minutes to obtain The translucent light blue glaze.

The high-temperature fluidity of the translucent light blue glaze prepared in this embodiment is 59 mm as measured by the plate method.

Example 2

The firing method of the translucent light blue glaze provided by the present embodiment comprises the following steps:

(1) Preparation of glaze slurry

Accurately weigh the glaze raw materials in the following percentages by weight: 7g of Longyan kaolin, 42g of potassium feldspar, 26.4g of quartz, 22g of wollastonite, 0.5g of bone ash, 2g of ferric oxide, and 0.1g of cobalt oxide. Put the ball stone and water into the ball mill, the glaze raw material: the mass ratio of high alumina ball stone: water is 1:2:0.8, the ball mill time is 30min, the speed is 450r/min, and the particle fineness is 0.2% of the 10,000-hole sieve , mix and stir evenly to make a glaze slurry.

(2) Glazing

Apply the glaze slurry evenly on the surface of the high white mud body, the thickness of the glaze layer is 1mm, and let it dry.

(3) Firing

Put the glazed and dried high white mud body into a reducing gas kiln, reduce it at 980°C for 4 hours, then fire it under a reducing atmosphere for 1 hour and raise the temperature to 1310°C, and keep it at this temperature for 10 minutes, and the product is obtained. Said translucent light blue glaze.

The high-temperature fluidity of the translucent light blue glaze prepared in this embodiment is 60 mm as measured by the plate method.

Example 3

The firing method of the translucent light blue glaze provided by the present embodiment comprises the following steps:

(1) Preparation of glaze slurry

Accurately weigh the glaze raw materials in the following percentages by weight: 10g of Longyan kaolin, 38g of potassium feldspar, 30g of quartz, 18.98g of wollastonite, 2g of bone ash, 1g of ferric oxide, and 0.02g of cobalt oxide. Stone and water are put into the ball mill, the glaze raw material: high alumina ball stone: water mass ratio is 1:2:0.8, the ball milling time is 30min, the rotating speed is 450r/min, and the particle fineness is 0.2% of the 10,000-hole sieve. Mix and stir evenly to make a glaze slurry.

(2) Glazing

Spread the glaze slurry evenly on the surface of the high white clay body, the thickness of the glaze layer is 0.5mm, and let it dry.

(3) Firing

Put the glazed and dried high white clay body into a reducing gas kiln, reduce it at 1020°C for 3 hours, then fire it in a reducing atmosphere for 7 hours and raise the temperature to 1280°C, and keep it at this temperature for 10 minutes, and the product is obtained. Said translucent light blue glaze.

The high-temperature fluidity of the translucent light blue glaze prepared in this embodiment is 59 mm as measured by the plate method.

Example 4

The firing method of the translucent white glaze provided by the present embodiment comprises the steps:

(1) Preparation of glaze slurry

Accurately weigh the following glaze raw materials: 10g of Longyan kaolin, 41g of potassium feldspar, 29g of quartz, 19g of wollastonite, and 1g of bone ash. Put the above glaze raw materials, high alumina ball stone and water into a ball mill. The glaze raw material: high alumina ball The mass ratio of stone: water is 1:2:0.8, the ball milling time is 30min, the rotating speed is 450r/min, the particle fineness is 0.2% of the 10,000-hole sieve, and the glaze slurry is made by mixing evenly.

(2) Glazing

Apply the glaze slurry evenly on the surface of the high white clay body, the thickness of the glaze layer is 0.75mm, and let it dry.

(3) Firing

Put the glazed and dried high white clay body into a reducing gas kiln, reduce it at 1010°C for 3.2 hours, then fire it under a reducing atmosphere for 5 hours and raise the temperature to 1300°C, and keep it at this temperature for 10 minutes, then it is produced The translucent white glaze.

The high-temperature fluidity of the translucent white glaze prepared in this embodiment is 59 mm as measured by the plate method.

Comparative example 1

The firing method of the opacified glaze provided by this comparative example comprises the steps:

(1) Preparation of glaze slurry

Accurately weigh the glaze raw materials in the following percentages by weight: 8.85g of Longyan kaolin, 40.34g of potassium feldspar, 27.55g of quartz, 20.66g of wollastonite, 0.8g of zinc oxide, 1g of barium carbonate, 0.6g of beryl and 0.2g of albite , put the above-mentioned glaze raw material, high alumina ball stone and water into the ball mill, the mass ratio of the glaze raw material: high alumina ball stone: water is 1:2:0.8, the ball milling time is 30min, the rotating speed is 450r/min, and the particles are fine The density is 0.2% over 10,000-hole sieve, mix and stir evenly to make glaze slurry.

(2) Glazing

Apply the glaze slurry evenly on the surface of the high white clay body, the thickness of the glaze layer is 0.75mm, and let it dry.

(3) Firing

Put the glazed and dried high white mud body into a reducing gas kiln, reduce it at 1000°C for 3.5 hours, then fire it in a reducing atmosphere for 3 hours and raise the temperature to 1290°C, and keep it at this temperature for 10 minutes to obtain The opacifying glaze.

As measured by the flat plate method, the high-temperature fluidity of the opacified glaze prepared in this comparative example is 67 mm.

Comparative example 2

The firing method of the translucent light blue glaze that this comparative example provides comprises the steps:

(1) Preparation of glaze slurry

Accurately weigh the glaze raw materials in the following percentages by weight: 7g of Longyan kaolin, 42g of potassium feldspar, 26.4g of talc, 22g of wollastonite, 0.5g of bone ash, 2g of ferric oxide, and 0.1g of cobalt oxide. Put the ball stone and water into the ball mill, the glaze raw material: the molar ratio of high alumina ball stone: water is 1:2:0.8, the ball mill time is 30min, the speed is 450r/min, and the particle fineness is 0.2% of the 10,000-hole sieve , mix and stir evenly to make a glaze slurry.

(2) Glazing

Apply the glaze slurry evenly on the surface of the high white mud body, the thickness of the glaze layer is 1mm, and let it dry.

(3) Firing

Put the glazed and dried high white mud body into a reducing gas kiln, reduce it at 980°C for 4 hours, then fire it under a reducing atmosphere for 1 hour and raise the temperature to 1310°C, and keep it at this temperature for 10 minutes, and the product is obtained. Said translucent light blue glaze.

As measured by the plate method, the high-temperature fluidity of the translucent light blue glaze prepared in this comparative example is 40 mm.

Experimental example

Prepare 100 pieces of ceramic products respectively by the firing method of embodiment 1-4 of the present invention and comparative example 1-2, and the ceramic product glaze thickness of making is uniform, and color uniform is qualified product, embodiment 1-4 and comparative example 1 -2 The qualified number of fired ceramic products is shown in Table 1.

Table 1 embodiment 1-4 and the qualified number of 100 pieces of ceramic products fired by comparative example 1-2

The number of qualified Example 1 90 Example 2 92 Example 3 90 Example 4 96 Comparative example 1 60 Comparative example 2 55

It can be seen from Table 1 that the pass rate of the glazes of Examples 1-4 of the present invention during the firing process is higher than that of Comparative Examples 1-2.

In addition, the high-temperature fluidity of the glaze in Comparative Example 1 of the present invention was 67 mm during the firing process, and the high-temperature fluidity of the glazes in Example 1, Example 3 and Example 4 was 59 mm during the firing process. The high-temperature fluidity of the glaze material of 2 is 60 millimeters in the firing process. It can be seen that the high-temperature viscosity of the glaze material of Examples 1-4 in the firing process is higher than that of Comparative Example 1, which can avoid flowing glaze, piled glaze, and glaze. Defects of uneven surface thickness and uneven color. The high-temperature fluidity of the product of the glaze of Comparative Example 2 is 40 mm during the firing process. At this time, the high-temperature viscosity of the product is too high, the fluidity of the glaze layer is poor, and the glaze surface often presents ripples.

To sum up, the glaze of the present invention has high viscosity, low fluidity, and high pass rate of products during the firing process, and the glaze surface of ceramic products prepared by using the glaze composition of the present invention has high gloss, pure color, and excellent appearance. Beautiful and full of meaning.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (8)

1. A glaze composition, characterized in that it comprises the following raw materials in parts by weight, 7 to 10 parts of Longyan kaolin, 38 to 42 parts of potassium feldspar, 25 to 30 parts of quartz, 18 to 22 parts of wollastonite, bone ash 0.5 to 2 parts and 1.02 to 2.1 parts of pigment. 2 . The glaze composition according to claim 1 , wherein the coloring material comprises 1-2 parts of ferric oxide and 0.02-0.1 part of cobalt oxide. 3. The glaze composition according to claim 1 or 2, characterized in that, based on the total mass of the glaze composition, it comprises the following raw materials in mass percentage, Longyan kaolin 7-10%, potassium feldspar 38-42%, quartz 25-30%, wollastonite 18-22%, bone ash 0.5-2%, ferric oxide 1-2% and cobalt oxide 0.02-0.1% . 4. glaze composition according to claim 3, is characterized in that, comprises the raw material of following mass percentage, Longyan kaolin 8.85%, feldspar 40.34%, quartz 27.55%, wollastonite 20.66%, bone ash 0.98%, ferric oxide 1.57% and cobalt oxide 0.05%. 5. A glaze fired from the glaze composition according to claim 1. 6. A translucent light blue glaze fired from the glaze composition according to any one of claims 2-4. 7. a method for firing glaze by the glaze composition described in any one of claims 1-4, is characterized in that, comprises the following steps: (1) Preparation of glaze slurry Put the glaze raw material, high alumina ball stone and water accurately weighed according to the weight percentage into a ball mill, ball mill, the particle fineness is 0.2% of the 10,000-hole sieve, mix and stir evenly to make a glaze slurry; (2) Glazing Apply the glaze slurry evenly on the surface of the body, the thickness of the glaze layer is 0.5mm ~ 1mm, and dry it; (3) Firing Put the glazed and dried green body into the reduction gas kiln, the reduction temperature is 980 ° C ~ 1020 ° C, the time is 3 ~ 4 hours, and then fired in the reducing atmosphere for 1 ~ 7 hours, the temperature is raised to 1280 ° C ~ 1310 ° C, and in the Keep the temperature for 10 minutes at the highest firing temperature, and when the temperature in the kiln drops to room temperature, take out the fired green body to obtain the glaze. 8. the method for firing glaze with glaze composition according to claim 7, is characterized in that, the mass ratio of described glaze raw material, high alumina ball stone and water is 1:2:0.8; Described ball milling time is 30min, The rotating speed is 450r/min.