CN112408786A - Dull color glaze mixed with waste ceramic powder, ceramic product and preparation method - Google Patents
Dull color glaze mixed with waste ceramic powder, ceramic product and preparation method Download PDFInfo
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- CN112408786A CN112408786A CN202011302905.6A CN202011302905A CN112408786A CN 112408786 A CN112408786 A CN 112408786A CN 202011302905 A CN202011302905 A CN 202011302905A CN 112408786 A CN112408786 A CN 112408786A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
Abstract
The invention discloses a matt color glaze mixed with waste porcelain powder, a ceramic product and a preparation method thereof, wherein the glaze comprises a basic glaze and an additional pigment, and the basic glaze comprises the following raw materials in parts by weight: 15-30 parts of potash feldspar, 4-10 parts of calcined talc, 5-10 parts of kaolin, 3-7 parts of calcined zinc oxide, 20-30 parts of quartz powder, 6-16 parts of calcite, 0-6 parts of dolomite, 0-8 parts of zirconium silicate and 5-20 parts of waste porcelain powder. The glaze of the ceramic product fired by the glaze is a matt glaze, and has positive color development and uniform and stable color development.
Description
Technical Field
The invention relates to the technical field of ceramics, in particular to a matt color glaze doped with waste ceramic powder, a ceramic product and a preparation method thereof.
Background
The matt glaze is a glaze with mercerized or jade-like luster and no strong reflected light, and the glaze can obtain better effect when applied to floor tiles, wall tiles or sanitary ware.
Most of the existing matt glazes are white matt glazes and are calcium, magnesium, barium and zinc systems. The matt glaze is obtained by adding a certain amount of pigment into white matt glaze serving as a base glaze. The preparation of the matt white glaze is easier, but after the pigment is added into the white matt glaze serving as the base glaze, the color of the fired glaze is unstable along with the fluctuation of a kiln, and the quality of the ceramic product is influenced.
Disclosure of Invention
The invention aims to provide a non-brilliant color glaze mixed with waste porcelain powder, which has the characteristic of stable color.
The invention also aims to provide a preparation method of the ceramic product, which has the characteristics of simple preparation process and stable color of the finished product.
The invention also aims to provide a ceramic product which has the characteristic of stable glaze quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
the dull color glaze material doped with waste porcelain powder comprises a base glaze material and an external pigment, wherein the base glaze material comprises the following raw materials in parts by weight: 15-30 parts of potash feldspar, 4-10 parts of calcined talc, 5-10 parts of kaolin, 3-7 parts of calcined zinc oxide, 20-30 parts of quartz powder, 6-16 parts of calcite, 0-6 parts of dolomite, 0-8 parts of zirconium silicate and 5-20 parts of waste porcelain powder.
Furthermore, the fineness of the waste porcelain powder is 80-140 meshes.
Further, the waste ceramic powder comprises the following chemical components in percentage by mass: SiO 22 63.50-65.00％、Al2O3 22.00-24.00％、Fe2O31.04-1.24％、TiO2 0.18-0.22％、CaO 0.96-1.16％、MgO 0.56-0.86％、K2O 2.36-2.86％、Na2O 1.06-1.36％、IL：0.44-0.64％。
Further, the external pigment comprises the following components in parts by weight: 2.5-3.5 parts of zirconium iron red pigment, 2.5-3.0 parts of praseodymium yellow pigment and 0.50-0.55 part of cobalt black pigment.
Furthermore, the raw materials of the basic glaze and the external pigment are added into a ball mill to be ball-milled by a wet method to prepare glaze slip, and the content of particles with the particle size of less than 10 mu m in the glaze slip is 75-85% in percentage by weight.
A method of making a ceramic article comprising the steps of:
(1) adding the raw materials and the added pigment of the base glaze material of the matt color glaze material doped with the waste porcelain powder into a ball mill according to the formula proportion for wet ball milling to obtain glaze slurry, wherein the content of particles with the particle size of less than 10 mu m in the glaze slurry is 75-85% in percentage by weight;
(2) applying the glaze slip obtained in the step (1) to the surface of the molded blank in a glaze spraying manner;
(3) and putting into a kiln for sintering.
Furthermore, in the step (1), the weight ratio of the ball-entering raw materials to water is (55-60) to (40-45) during wet ball milling.
Furthermore, in the step (2), the thickness of the glaze slip is 0.8-1.4 mm.
Furthermore, in the step (3), the raw materials are sintered at 1180-1200 ℃ for 14-18 h.
The ceramic product comprises a blank body and a glaze layer positioned on the surface of the blank body, wherein the glaze layer is formed by firing the matt color glaze material doped with waste ceramic powder.
The invention has the beneficial effects that:
1. waste porcelain powder is introduced into the formula of the non-bright colored glaze. The oxidation reaction of each component in the waste ceramic powder is basically finished, the gas emission in the firing process is less, the fired glaze layer is compact, the hardness and the fineness of the glaze surface can be obviously improved, and the porosity of the glaze surface is extremely low, so that the anti-fouling capability of the glaze surface can be obviously enhanced
2. The firing range of the matt color glaze is wide, the glaze is favorable for adapting to the fluctuation of a kiln, and the matt color glaze has stable color generation effect.
Detailed Description
The technical solution of the present invention will be further described with reference to the accompanying embodiments.
The dull color glaze mixed with waste porcelain powder comprises a base glaze and an external pigment, wherein the base glaze comprises the following raw materials in parts by weight: 15-30 parts of potash feldspar, 4-10 parts of calcined talc, 5-10 parts of kaolin, 3-7 parts of calcined zinc oxide, 20-30 parts of quartz powder, 6-16 parts of calcite, 0-6 parts of dolomite, 0-8 parts of zirconium silicate and 5-20 parts of waste porcelain powder.
MgO, CaO and ZnO are introduced into the formula to different degrees and play a role of a matt agent, and the precipitated crystal phase is mainly diopside (CaMg (Si)2O7) Anorthite (CaO. Al)2O3.2SiO2) The crystal phase can be separated out in a wider temperature range, so that the crystal phase can exist stably, the glaze material has a wider firing range, the glaze material is favorable for adapting to the fluctuation of a kiln, and the non-gloss color glaze material has a stable color generation effect.
Specifically, the magnesia can reduce the firing temperature of the glaze, reduce the expansion coefficient of the glaze and enhance the crystallization capacity of the glaze, so the introduction of the magnesia widens the firing range of the glaze, and the MgO can generate cordierite (2 MgO.2Al) with silicon-aluminum oxide in the glaze2O3.5SiO2) With CaO, SiO2The reaction produces diopside (CaO. MgO.2SiO)2) So that crystals are easy to precipitate in the glaze. However, when the talc is introduced more (more than 10%), the firing temperature of the glaze is too low, the melt is boiled and bubbles appear, and when the talc is added less (less than 4%), the glaze is fired because the adjustment effect cannot be achieved, and the matt effect is not good;
ZrSiO4the introduction of the zirconium dioxide can not only play a role of an opacifier and improve the covering power and the whiteness of the glaze, but also the residual zirconium particles can be used as a crystal nucleating agent to further promote the precipitation of crystals, and the high-quality matt glaze can be easily obtained by adding a certain amount of zirconium.
Waste porcelain powder is introduced into the formula of the non-bright colored glaze. The oxidation reaction of each component in the waste ceramic powder is basically finished, the gas emission in the firing process is low, the fired glaze layer is compact, the hardness and the fineness of the glaze surface can be obviously improved, and the porosity of the glaze surface is extremely low, so that the anti-fouling capability of the glaze surface can be obviously enhanced. On the other hand, because the chemical components of the waste porcelain powder and the blank body are similar, the waste porcelain powder is beneficial to forming a thicker middle layer between the blank glazes, so that the expansion coefficients of the blank glazes are appropriate, the adaptability of the blank glazes is improved, and the thermal stability of products is improved; the waste porcelain powder can obviously improve the initial melting temperature of the glaze, expand the firing temperature range of the glaze, facilitate the discharge of gas in the firing process of the blank glaze, reduce the defects of air holes, needle holes, glaze bubbles and the like, and improve the glaze quality; and thirdly, the waste porcelain powder is sintered at high temperature, belongs to ridge raw materials, and the glaze shrinkage is small in the drying and sintering processes, so that the glaze shrinkage is small, and the excellent rate is high.
Furthermore, the fineness of the waste porcelain powder is 80-140 meshes. The fineness of the waste porcelain powder is limited, so that the fired glaze is compact and fine in surface, and the glaze has better anti-fouling performance.
Further, the waste ceramic powder comprises the following chemical components in percentage by mass: SiO 22 63.50-65.00％、Al2O322.00-24.00％、Fe2O31.04-1.24％、TiO20.18-0.22％、CaO0.96-1.16％、MgO 0.56-0.86％、K2O 2.36-2.86％、Na2O 1.06-1.36％、IL：0.44-0.64％。
Further, the external pigment comprises the following components in parts by weight: 2.5-3.5 parts of zirconium iron red pigment, 2.5-3.0 parts of praseodymium yellow pigment and 0.50-0.55 part of cobalt black pigment. The kind and addition amount of the external pigment are limited, so that the color of the matt color glaze is brown after being fired. The brown glaze has higher color development requirement, and based on the basic glaze, the brown glaze can adapt to the fluctuation of a kiln, so that the brown glaze has stable color development effect.
Furthermore, the raw materials of the basic glaze and the external pigment are added into a ball mill to be ball-milled by a wet method to prepare glaze slip, and the content of particles with the particle size of less than 10 mu m in the glaze slip is 75-85 percent by weight.
The fineness of the glaze is controlled within a reasonable range, so that the matt brown glaze is pure in color. Specifically, when the content of particles with the particle size of less than 10 microns in the glaze slip is less than 75%, the particle composition of the pigment and the base glaze in the glaze does not reach the level, so that the color development of the fired glaze is not positive (not brown, black or red), and when the content of particles with the particle size of less than 10 microns in the glaze slip is more than 85%, the glaze is too fine, and after the glaze is sprayed and dried, chicken feet crack appears on the glaze surface, so that the glaze shrinkage defect appears after firing.
The invention also provides a preparation method of the ceramic product, which comprises the following steps:
(1) adding the raw materials and the added pigment of the base glaze material of the matt color glaze material doped with the waste porcelain powder into a ball mill according to the formula proportion for wet ball milling to obtain glaze slurry, wherein the content of particles with the particle size of less than 10 mu m in the glaze slurry is 75-85% in percentage by weight;
(2) applying the glaze slip obtained in the step (1) to the surface of the molded blank in a glaze spraying manner;
(3) and putting into a kiln for sintering.
The preparation method of the ceramic product has the characteristics of simple process and easy control, and can obtain the ceramic product with stable glaze color and positive color. Preferably, the ceramic article is a sanitary ware.
Furthermore, in the step (1), the weight ratio of ball-entering raw materials to water is (55-60): 40-45) during wet ball milling, and glaze slurry with proper specific gravity and fluidity can be obtained according to the proportion so as to facilitate glaze spraying.
Further, in the step (2), the thickness of the glaze slip is 0.8-1.4 mm. The glaze spraying thickness is controlled in a reasonable range, so that the color development of the glaze is uniform and stable. When the glaze spraying thickness is too low, the glaze color is not full and is not uniform, and when the glaze thickness is too thick, cracks are easy to appear on the glaze surface.
Further, in the step (3), the raw materials are sintered at 1180-1200 ℃ for 14-18 h. Based on the rationality of the glaze formula, the color can be uniformly developed after the sintering at a wider temperature range (1180-1200 ℃), and the difficulty in controlling the temperature of the kiln is reduced. When the firing temperature is too high, the crystal precipitated at the early stage is re-dissolved, so that the glass phase in the glaze is increased, the phase is mainly the glass phase, and the matt glaze is changed into the glossy glaze; on the contrary, the low sintering temperature can cause the raw sintering to cause non-uniform nucleation, and the glaze surface has too fine crystal grains and dull luster to lose the matt effect. The high-quality matt glaze can be obtained by designing longer firing time.
Correspondingly, the invention also provides a ceramic product, which comprises a blank body and a glaze layer positioned on the surface of the blank body, wherein the glaze layer is formed by firing the matt color glaze material doped with the waste ceramic powder.
The invention is further illustrated by the following examples and comparative examples.
Example group A
A matte color glaze incorporating waste porcelain powder of this example group includes a base glaze and an additional coloring material, and the formulations of the base glaze and the additional coloring material in parts by weight are shown in the following table. Wherein the fineness of the waste porcelain powder is 80-140 meshes.
A method of making a ceramic article comprising the steps of:
(1) and (3) adding the raw materials of the basic glaze material and the external pigment into a ball mill according to the formula proportion for wet ball milling to obtain glaze slip, wherein the weight ratio of the ball raw materials to the water is 58: 42. According to weight percentage, the content of particles with the diameter less than 10 mu m in the glaze slip is 80 percent;
(2) applying the glaze slip obtained in the step (1) to the surface of the molded blank in a glaze spraying mode, wherein the thickness of the applied glaze slip is 1 mm;
(3) sintering in a kiln, and sintering at 1180-1200 ℃ for 14-18 h.
The ceramic product obtained by firing comprises a green body and a glaze layer positioned on the surface of the green body, wherein the glaze layer is formed by firing the matt color glaze material doped with the waste ceramic powder.
Observing the color development effect of the glaze surface of the obtained ceramic product, and carrying out an anti-fouling capability test and a thermal stability test on the obtained ceramic product.
The anti-fouling capability test method comprises the following steps: wiping the surface of the product or test piece with clean soft cloth at 100cm23-4 drops of ink are dripped on the surface of the hand, and then the right hand wears a rubber glove to hold the finger tightlyAnd (3) uniformly smearing the liquid, repeatedly grinding the liquid with strength, washing the ink on the surface of the liquid with water after 3min, and observing the amount of black stains adsorbed on the surface of the glaze layer. The number of black stains is within 5, which shows that the antifouling capacity is excellent; the number of black stains is 5-20, which indicates that the antifouling capacity is general; the number of black spots was 20 or more, indicating poor antifouling ability.
The thermal stability detection method comprises the following steps: and (3) placing the product or the test piece in an electric heating air blast constant temperature drying oven to be baked for 3 hours at the temperature of 130 ℃, then placing the product or the test piece in ice water at the temperature of 3 ℃, after the temperature of the product or the test piece is reduced to normal temperature, placing the product or the test piece in a container filled with red ink aqueous solution to be soaked for 10 minutes, and taking out the product or the test piece (the red ink aqueous solution is to immerse the object to be detected) to observe whether the glaze surface has cracks. If no cracks are present, the thermal stability is good, and if cracks are present, the thermal stability is poor.
The color development effect and the test results are shown in the following table.
Example group B
Based on the formulation of the base glaze and the added pigment of example A3 and the method of making a ceramic article, only the fineness of the glaze slip and the amount of added water for ball entry in step (1) and the thickness of the applied glaze slip in step (2) were varied as shown in the following table.
And (3) preparing the ceramic product by adopting the data, observing the color development effect of the glaze surface of the obtained ceramic product, and carrying out an anti-fouling capability test and a thermal stability test on the obtained ceramic product.
Comparative example group A
Based on the formulation of the base glaze and of the applied colorant of example a3 and the method of preparation of a ceramic article, only the amount of waste porcelain powder added to the base glaze was varied.
The waste porcelain powder of the non-brilliant colored glaze with incorporation of waste porcelain powder of comparative example a1 was 9 parts by weight;
the waste porcelain powder of the non-brilliant colored glaze with incorporation of waste porcelain powder of comparative example a2 was 8 parts by weight;
the waste porcelain powder of the non-brilliant colored glaze with incorporation of waste porcelain powder of comparative example a3 was 21 parts by weight;
the waste porcelain powder of the non-brilliant colored glaze with incorporation of waste porcelain powder of comparative example a4 was 23 parts by weight.
The ceramic product is prepared by adopting the formula and the method, the color development effect of the glaze surface of the obtained ceramic product is observed, and the anti-fouling capability test and the thermal stability test are carried out on the obtained ceramic product.
| Item | Comparative example A1 | Comparative example A2 | Comparative example A3 | Comparative example A4 |
| Anti-fouling performance | In general | In general | Superior food | Superior food |
| Thermal stability | Good taste | Difference (D) | Good taste | Good taste |
| Color development effect | Color irregularity | Color irregularity | Color irregularity | Color irregularity |
Therefore, when the addition amount of the waste porcelain powder is too small, the improvement of the glaze quality is not obvious, the firing temperature range cannot be widened well, and the color generation effect is further influenced. When the addition amount of the waste porcelain powder is too much, impurities in the waste porcelain powder can influence the firing effect of the pigment.
Comparative example group B
Based on the basic glaze and applied pigment formulation of example a3 and a method of manufacturing a ceramic article, only the size of the glaze slip of step (1) was varied.
The ceramic article of comparative example B1 was prepared in which the glaze slip of step (1) had a particle content of 10 μm or less of 73%;
the ceramic article of comparative example B1 was prepared in which the glaze slip of step (1) had a particle content of 74% and less than 10 μm;
the ceramic article of comparative example B1 was prepared in which the glaze slip of step (1) had a particle content of 86% or less of 10 μm;
the ceramic product of comparative example B1 was prepared in such a way that the glaze slip of step (1) had a particle content of 87% and less of 10 μm.
The ceramic product is prepared by the method and the formula, the color development effect of the glaze surface of the obtained ceramic product is observed, and the anti-fouling capability test and the thermal stability test are carried out on the obtained ceramic product.
| Item | Comparative example B1 | Comparative example B2 | Comparative example B3 | Comparative example B4 |
| Anti-fouling performance | Superior food | Superior food | In general | In general |
| Thermal stability | Good taste | Good taste | Good taste | Good taste |
| Color development effect | Color irregularity | Color irregularity | Color correction | Color correction |
It can be seen that when the content of particles having a size of 10 μm or less in the glaze slurry is less than 75%, the color developing effect is not good. When the content of particles of 10 μm or less in the glaze slurry is more than 85%, the antifouling property is affected due to the glaze reduction phenomenon.
Comparative example set C
Based on the base glaze and applied pigment formulation of example a3 and the method of making a ceramic article, only the thickness of the glaze slip applied in step (2) was varied.
The ceramic article of comparative example C1 was prepared by applying the glaze slip of step (2) at a thickness of 0.6 mmm;
the ceramic article of comparative example C2 was prepared by applying the glaze slip of step (2) at a thickness of 0.7 mmm;
the ceramic article of comparative example C3 was prepared by applying the glaze slurry of step (2) at a thickness of 1.5 mmm;
the ceramic article of comparative example C4 was prepared by applying the glaze slurry of step (2) at a thickness of 1.6 mmm.
The ceramic product is prepared by the method and the formula, the color development effect of the glaze surface of the obtained ceramic product is observed, and the anti-fouling capability test and the thermal stability test are carried out on the obtained ceramic product.
Therefore, when the glaze spraying thickness is too small, the color development of the glaze is influenced, and the thermal stability and the anti-fouling performance of the glaze are influenced. When the glaze spraying thickness is too large, the antifouling performance is affected due to the occurrence of cracks on the glaze surface.
Comparative example set D
Based on the base glaze and applied colorant formulation of example a3 and a method of making a ceramic article, only the firing temperature of step (3) was varied.
The ceramic article of comparative example D1 was prepared by the method wherein the firing temperature of step (3) was 1175 ℃;
the ceramic article of comparative example D2 was prepared by the method in which the firing temperature in step (3) was 1205 ℃.
The glaze of the ceramic product obtained by observing the glaze of the ceramic product prepared by the method and the formula has higher glossiness than that of the ceramic product prepared by the comparative example D1, but the glaze of the comparative example D2 has dark glossiness, and cannot achieve the effect of mercerizing or jade-like luster without strong reflected light.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The non-gloss color glaze mixed with the waste porcelain powder is characterized by comprising a basic glaze and an external pigment, wherein the basic glaze comprises the following raw materials in parts by weight: 15-30 parts of potash feldspar, 4-10 parts of calcined talc, 5-10 parts of kaolin, 3-7 parts of calcined zinc oxide, 20-30 parts of quartz powder, 6-16 parts of calcite, 0-6 parts of dolomite, 0-8 parts of zirconium silicate and 5-20 parts of waste porcelain powder.
2. The non-gloss color glaze doped with waste porcelain powder as claimed in claim 1, wherein the fineness of the waste porcelain powder is 80-140 mesh.
3. The non-gloss color glaze doped with waste porcelain powder as claimed in claim 1, wherein the chemical composition of the waste porcelain powder by mass percentage is: SiO 22 63.50-65.00％、Al2O322.00-24.00％、Fe2O31.04-1.24％、TiO20.18-0.22％、CaO0.96-1.16％、MgO 0.56-0.86％、K2O 2.36-2.86％、Na2O 1.06-1.36％、IL：0.44-0.64％。
4. The non-brilliant colored glaze with incorporation of waste porcelain powder according to claim 1, characterized in that the external pigments comprise, in parts by weight: 2.5-3.5 parts of zirconium iron red pigment, 2.5-3.0 parts of praseodymium yellow pigment and 0.50-0.55 part of cobalt black pigment.
5. The non-brilliant color glaze doped with waste porcelain powder as claimed in claim 1, wherein the raw materials of the basic glaze and the external pigment are added into a ball mill and ball-milled by a wet method to prepare glaze slip, and the content of particles with a particle size of less than 10 μm in the glaze slip is 75-85% by weight.
6. A method of making a ceramic article, comprising the steps of:
(1) adding the raw materials and the external pigment of the base glaze of the matt color glaze doped with waste porcelain powder of any one of claims 1 to 5 into a ball mill according to the formula proportion for wet ball milling to obtain glaze slip, wherein the content of particles with the particle size of less than 10 μm in the glaze slip is 75 to 85 percent in percentage by weight;
(2) applying the glaze slip obtained in the step (1) to the surface of the molded blank in a glaze spraying manner;
(3) and putting into a kiln for sintering.
7. The method according to claim 6, wherein in the step (1), the weight ratio of the ball-entering raw materials to water in the wet ball milling is (55-60) to (40-45).
8. The method according to claim 6, wherein in the step (2), the glaze slurry is applied to the surface of the shaped body to a thickness of 0.8 to 1.4 mm.
9. The preparation method as claimed in claim 6, wherein in the step (3), the mixture is fired at 1180-1200 ℃ for 14-18 h.
10. A ceramic product comprising a body and a glaze layer on the surface of the body, the glaze layer being fired from the matt coloured glaze incorporating waste porcelain powders as claimed in any one of claims 1 to 5.
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| CN113511922A (en) * | 2021-08-04 | 2021-10-19 | 佛山东鹏洁具股份有限公司 | Matte glaze for sanitary ceramics and preparation method of sanitary ceramics |
| CN115246709A (en) * | 2022-08-01 | 2022-10-28 | 河北浩锐陶瓷制品有限公司 | High-flatness ceramic tile and production process thereof |
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