Low-gloss wear-resistant stone ceramic tile and method for manufacturing the same

Abstract

The application discloses a low-gloss wear-resistant granite ceramic tile and a preparation method thereof, and relates to the technical field of ceramic tiles. The low-gloss wear-resistant granite ceramic tile comprises, from bottom to top, a body layer, a concave-convex bottom glaze layer, a pattern layer and a protective layer. The protective layer is prepared from a surface glaze. The preparation raw materials of the surface glaze comprise, in percentage by mass, 37-43% of first frit, 23-27% of second frit, 3-7% of calcium feldspar powder, 3-7% of cordierite powder, 12-18% of kaolin, 3-8% of dolomite and 4-7% of calcined talc. The low-gloss wear-resistant granite ceramic tile has a delicate hand feeling, low gloss and a visual angle effect very close to that of a rock.

Description

Technical Field

[0001] This invention relates to the field of ceramic tile technology, and in particular to a low-gloss, wear-resistant plain rock ceramic tile and its preparation method. Background Technology

[0002] Plain rock ceramic tiles are ceramic tiles whose glaze effect closely resembles the surface of rock. To achieve a more realistic visual effect, plain rock ceramic tiles are required to have a low gloss, with the gloss level controlled below 15°. To achieve this low-gloss effect, the industry commonly uses the principle of diffuse reflection to reduce the gloss of the glaze. Diffuse reflection can be achieved by creating textured surfaces, such as forming numerous granular crystals. The more granular crystals in the glaze, the better the diffuse reflection effect theoretically; however, this also results in a glaze surface that feels too rough and lacks fineness.

[0003] Plain stone ceramic tiles mostly consist of a protective glaze layer, a pattern layer, a base glaze layer, and a body layer. The pattern layer creates the texture and color of imitation stone, while the base glaze layer mainly covers the body layer and improves ink color. To ensure clear visibility of the pattern layer, the protective glaze layer generally has good transparency and serves to resist wear and protect the pattern. Due to the high transparency of the protective glaze layer, its light transmittance is correspondingly high. When the roughness of the protective glaze layer itself is low, a significant amount of light will pass through it and reach the pattern layer. Because the surface of the pattern layer is relatively smooth, it will produce more specular reflection, thus increasing gloss. Reducing the specular reflection caused by the pattern layer can lower the gloss without increasing the roughness of the protective glaze layer. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a low-gloss, wear-resistant plain rock ceramic tile and its preparation method, aiming to solve the problem that plain rock ceramic tiles in the prior art are difficult to have both low gloss and a delicate feel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-gloss, wear-resistant plain ceramic tile comprises, from bottom to top, a body layer, a textured base glaze layer, a pattern layer, and a protective layer; the protective layer is made of a surface glaze, the raw materials for preparing the surface glaze, by mass percentage, comprising: 37%–43% first frit, 23%–27% second frit, 3%–7% anorthite powder, 3%–7% cordierite powder, 12%–18% kaolin, 3%–8% dolomite, and 4%–7% calcined talc.

[0007] The low-gloss, wear-resistant plain rock ceramic brick, wherein the chemical composition of the first frit, by mass percentage, includes: SiO2 35%–42%, Al2O3 13%–18%, Fe2O3 0.01%–0.03%, TiO2 0.01%–0.04%, CaO 6%–11%, MgO 7%–12%, K2O 3%–4%, Na2O 8%–13%, ZnO 6.5%–8.5%, B2O3 3%–4%, with the balance being impurities.

[0008] The low-gloss, wear-resistant plain rock ceramic brick, wherein the chemical composition of the second frit, by mass percentage, includes: SiO2 42%–50%, Al2O3 10%–15%, Fe2O3 0.01%–0.3%, CaO 11%–15%, MgO 13%–16%, K2O 1%–3%, Na2O 1%–3%, ZnO 2%–5%, BaO 1%–3%, with the balance being impurities.

[0009] The low-gloss wear-resistant plain rock ceramic brick, wherein the particle size D50 of the calcium feldspar powder is 350-450 nm; and the particle size D50 of the cordierite powder is 250-300 nm.

[0010] The low-gloss, wear-resistant plain ceramic tile, wherein the uneven base glaze layer is made from a base glaze, and the raw materials for preparing the base glaze, by mass percentage, include: 44%–53% third frit, 5%–7% titanium dioxide powder, 8%–11% calcined talc, 3%–6% potassium feldspar, 7%–12% zirconium dioxide, 8%–12% nepheline, 9%–15% kaolin, and 3%–6% dolomite.

[0011] The low-gloss, wear-resistant plain rock ceramic brick, wherein the titanium dioxide powder has a D50 of 750–900 nm.

[0012] The low-gloss, wear-resistant plain rock ceramic brick, wherein the chemical composition of the third fused block, by mass percentage, includes: SiO2 44%–48%, Al2O3 11%–15%, Fe2O3 0.1%–0.3%, CaO 5%–9%, ​​MgO 3%–6%, TiO2 8%–13%, K2O 1%–4%, Na2O 2%–5%, ZrO2 5%–8%, BaO 1%–3%, with the balance being impurities.

[0013] A method for preparing ceramic tiles, used to prepare the low-gloss, wear-resistant plain rock ceramic tiles as described above, includes the following steps:

[0014] Apply a base glaze to the body layer to form a textured base glaze layer;

[0015] Print patterns on the uneven base glaze layer to form a pattern layer;

[0016] Apply a surface glaze to the pattern layer to form a protective layer;

[0017] The low-gloss, wear-resistant plain rock ceramic brick is obtained by firing and polishing.

[0018] In the method for preparing ceramic bricks, the firing temperature is 1180–1230°C.

[0019] In the method for preparing the ceramic tile, the specific gravity of the glaze is 1.86–1.90 g / cm³. 3 .

[0020] Beneficial effects:

[0021] The first aspect of this invention provides a low-gloss, wear-resistant plain ceramic tile, which comprises a body layer, a textured glaze layer, a pattern layer, and a protective layer. The surface of the protective layer has multiple crystal particles that can diffuse reflection. In addition, after some light passes through the protective layer, the light is absorbed and diffused again by the pattern layer and the textured glaze layer, making the reflected light more dispersed, with lower reflection intensity in the same direction and lower gloss. Thus, the glaze surface has low gloss while maintaining good fineness.

[0022] The second aspect of the present invention provides a method for preparing ceramic tiles, for preparing the low-gloss wear-resistant plain rock ceramic tiles as described above. The preparation method adopts a one-time rapid firing process, which can be adapted to current production conditions without additional production investment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the layered structure of the low-gloss, wear-resistant plain rock ceramic brick provided by the present invention.

[0024] Explanation of main component symbols: 1-protective layer, 2-pattern layer, 3-embossed base glaze layer, 4-body layer. Detailed Implementation

[0025] This invention provides a low-gloss, wear-resistant plain rock ceramic brick and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0026] Please see Figure 1This invention provides a low-gloss, wear-resistant plain ceramic tile, comprising, from bottom to top, a body layer 4, a textured base glaze layer 3, a pattern layer 2, and a protective layer 1. The protective layer is made of a surface glaze, the raw materials for which, by mass percentage, include: 37%–43% first frit, 23%–27% second frit, 3%–7% anorthite powder, 3%–7% cordierite powder, 12%–18% kaolin, 3%–8% dolomite, and 4%–7% calcined talc. The first frit can increase the transparency of the protective layer to a certain extent, allowing some light to reach the pattern layer. The pattern layer covers the textured base glaze layer, and is therefore also textured, thus providing a second diffuse reflection effect and ensuring the glaze surface has a low gloss. Anorthite powder and cordierite powder serve as crystal nuclei, and the second frit promotes the growth of anorthite powder and cordierite powder, thereby forming multiple granular crystals on the surface of the protective layer, producing diffuse reflection. Kaolin, dolomite, and calcined talc are used as raw materials to promote the growth of cordierite. The first frit not only improves transparency but also acts as a solvent, adjusting the size of the crystal particles formed during firing. The high hardness of cordierite crystals enhances the wear resistance of the glaze. Compared to existing technologies achieving the same low gloss, the protective layer of this invention forms fewer crystals on its surface, resulting in a smoother tactile feel.

[0027] Preferably, the chemical composition of the first frit, by mass percentage, includes: SiO2 35%–42%, Al2O3 13%–18%, Fe2O3 0.01%–0.03%, TiO2 0.01%–0.04%, CaO 6%–11%, MgO 7%–12%, K2O 3%–4%, Na2O 8%–13%, ZnO 6.5%–8.5%, B2O3 3%–4%, with the balance being impurities. The first frit has high transparency and contains high amounts of Na2O and K2O, which helps to melt anorthite and cordierite powders, resulting in smaller crystal particles and a finer texture.

[0028] Preferably, the chemical composition of the second frit, by mass percentage, includes: SiO2 42%–50%, Al2O3 10%–15%, Fe2O3 0.01%–0.3%, CaO 11%–15%, MgO 13%–16%, K2O 1%–3%, Na2O 1%–3%, ZnO 2%–5%, BaO 1%–3%, with the balance being impurities. The second frit provides SiO2, Al2O3, CaO, and MgO, and during firing, it promotes the growth of anorthite and cordierite.

[0029] Preferably, the particle size D50 of the anorthite powder is 350–450 nm; the particle size D50 of the cordierite powder is 250–300 nm. Cordierite has a relatively high hardness, making it difficult to smooth during polishing, which increases the polishing difficulty. When the particle size of the anorthite powder is larger than that of the cordierite powder, the particle size of the anorthite crystals formed after firing will be larger than that of the cordierite crystals. The anorthite particles will protrude more from the glaze surface. After polishing, the surface of the anorthite crystals will become smoother. When human skin comes into contact with the glaze, it will simultaneously come into contact with both the anorthite and cordierite crystals. The anorthite crystals neutralize the roughness produced by the cordierite, giving the glaze a smooth feel. The particle size of the anorthite powder should not be too large, otherwise it will also lead to excessively large crystals, increasing the polishing difficulty.

[0030] The low-gloss, wear-resistant plain ceramic tile, wherein the textured base glaze layer is made from a base glaze. The raw materials for preparing the base glaze, by mass percentage, include: 44%–53% third frit, 5%–7% titanium dioxide powder, 8%–11% calcined talc, 3%–6% potassium feldspar, 7%–12% zirconium dioxide, 8%–12% nepheline, 9%–15% kaolin, and 3%–6% dolomite. The titanium dioxide powder acts as a nucleus, growing into larger crystals under the action of the third frit and other raw materials, thus forming the textured base glaze layer after firing. The raised crystal particles also provide diffuse reflection, reflecting light passing through the protective layer and compensating for insufficient diffuse reflection in the protective layer. Zirconium dioxide enhances whiteness to cover the body layer. Nepheline is used to adjust the coefficient of thermal expansion of the glaze, minimizing the differences between the body layer, the textured base glaze layer, the pattern layer, and the protective layer during firing, thereby reducing the defect rate. Although titanium dioxide itself can improve the gloss of the glaze, after the pattern layer is printed with inkjet ink, the uneven glaze layer will be covered by the pattern ink, so it will not increase the gloss.

[0031] Preferably, the D50 of the titanium dioxide powder is 750–900 nm. The particle size of the titanium dioxide powder is larger than that of the anorthite and cordierite powders in the surface glaze, resulting in titanium dioxide crystals in the uneven base glaze layer that provide diffuse reflection being larger in volume than the anorthite and cordierite crystals. This prevents the protective layer crystals from obscuring the uneven texture of the base glaze layer. Furthermore, the titanium dioxide crystals also increase the whiteness of the glaze layer and improve its covering effect on the body layer.

[0032] Preferably, the chemical composition of the third fused block, by mass percentage, includes: SiO2 44%–48%, Al2O3 11%–15%, Fe2O3 0.1%–0.3%, CaO 5%–9%, ​​MgO 3%–6%, TiO2 8%–13%, K2O 1%–4%, Na2O 2%–5%, ZrO2 5%–8%, BaO 1%–3%, with the balance being impurities. The high TiO2 content in the third fused block not only promotes the growth of titanium dioxide crystals but also increases whiteness. The CaO, Na2O, and K2O components it contains can reduce the high-temperature melt viscosity.

[0033] A method for preparing ceramic tiles, used to prepare the low-gloss, wear-resistant plain rock ceramic tiles as described above, includes the following steps:

[0034] Apply a base glaze to the body layer to form a textured base glaze layer;

[0035] Print patterns on the uneven base glaze layer to form a pattern layer;

[0036] Apply a surface glaze to the pattern layer to form a protective layer;

[0037] The low-gloss, wear-resistant plain rock ceramic brick is obtained by firing and polishing.

[0038] In the method for preparing ceramic bricks, the firing temperature is 1180–1230°C.

[0039] In the method for preparing the ceramic tile, the specific gravity of the glaze is 1.86–1.90 g / cm³. 3 .

[0040] The following examples and comparative examples further illustrate the present invention.

[0041] Example 1

[0042] A low-gloss, wear-resistant plain ceramic tile, the preparation method of which includes the following steps:

[0043] S001. Apply a base glaze to the body layer to form a textured base glaze layer;

[0044] S002. Print patterns on the uneven base glaze layer according to design requirements to form a pattern layer;

[0045] S003. Apply a surface glaze to the pattern layer to form a protective layer;

[0046] S004. Firing, the firing temperature is 1180~1230℃, and polishing is performed after firing to obtain the low-gloss wear-resistant plain rock ceramic brick;

[0047] In S001, the raw materials for preparing the base glaze, by mass percentage, include: 48% third frit, 6% titanium dioxide powder, 9% calcined talc, 4% potassium feldspar, 10% zirconium dioxide, 8% nepheline, 12% kaolin, and 3% dolomite.

[0048] The titanium dioxide powder has a D50 of 825 nm.

[0049] The chemical composition of the third melt, by mass percentage, includes: SiO2 46.21%, Al2O3 12.35%, Fe2O3 0.11%, CaO 7.83%, MgO 4.59%, TiO2 10.68%, K2O 2.33%, Na2O 4.26%, ZrO2 6.53%, BaO 1.38%, with the balance being impurities;

[0050] In S003, the raw materials for preparing the surface glaze, by mass percentage, include: 39% first frit, 24% second frit, 5% anorthite powder, 6% cordierite powder, 14% kaolin, 7% dolomite, and 5% calcined talc.

[0051] The chemical composition of the first fused block, by mass percentage, includes: SiO2 37.16%, Al2O3 17.52%, Fe2O3 0.02%, TiO2 0.03%, CaO 9.85%, MgO 8.96%, K2O 3.41%, Na2O 9.1%, ZnO 7.21%, B2O3 3.58%, with the balance being impurities;

[0052] The chemical composition of the second fused block, by mass percentage, includes: SiO2 47.16%, Al2O3 12.39%, Fe2O3 0.03%, CaO 12.36%, MgO 14.87%, K2O 1.68%, Na2O 2.57%, ZnO 4.25%, BaO 2.24%, with the balance being impurities;

[0053] The particle size D50 of the anorthite powder is 388 nm.

[0054] The particle size D50 of the cordierite powder is 267 nm.

[0055] Example 2

[0056] A low-gloss, wear-resistant plain rock ceramic tile, the preparation method of which differs from that of Example 1, is as follows:

[0057] The formulation of the base glaze varies. In this embodiment, the raw materials for preparing the base glaze, by mass percentage, include: 44% third frit, 7% titanium dioxide powder, 10% calcined talc, 4% potassium feldspar, 8% zirconium dioxide, 8% nepheline, 14% kaolin, and 5% dolomite.

[0058] The formulation of the surface glaze varies. In this embodiment, the raw materials for preparing the surface glaze, by mass percentage, include: 35% first frit, 27% second frit, 3% anorthite powder, 3% cordierite powder, 17% kaolin, 8% dolomite, and 7% calcined talc.

[0059] The particle size D50 of the anorthite powder is 354 nm.

[0060] The particle size D50 of the cordierite powder is 251 nm.

[0061] Example 3

[0062] A low-gloss, wear-resistant plain rock ceramic tile, the preparation method of which differs from that of Example 1, is as follows:

[0063] The formulation of the base glaze varies. In this embodiment, the raw materials for preparing the base glaze, by mass percentage, include: 52% third frit, 5% titanium dioxide powder, 8% calcined talc, 3% potassium feldspar, 7% zirconium dioxide, 12% nepheline, 10% kaolin, and 3% dolomite.

[0064] The formulation of the surface glaze varies. In this embodiment, the raw materials for preparing the surface glaze, by mass percentage, include: 43% first frit, 23% second frit, 5% anorthite powder, 4% cordierite powder, 12% kaolin, 8% dolomite, and 5% calcined talc.

[0065] The particle size D50 of the anorthite powder is 354 nm.

[0066] The particle size D50 of the cordierite powder is 297 nm.

[0067] Comparative Example 1

[0068] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0069] The formulation of the glaze varies. In this embodiment, the raw materials for preparing the glaze, by mass percentage, include: 32% first frit, 26% second frit, 6% anorthite powder, 6% cordierite powder, 14% kaolin, 8% dolomite, and 8% calcined talc.

[0070] Comparative Example 2

[0071] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0072] The formulation of the glaze varies. In this embodiment, the raw materials for preparing the glaze, by mass percentage, include: 47% first frit, 23% second frit, 5% anorthite powder, 6% cordierite powder, 12% kaolin, 3% dolomite, and 4% calcined talc.

[0073] Comparative Example 3

[0074] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0075] The formulation of the glaze varies. In this embodiment, the raw materials for preparing the glaze, by mass percentage, include: 32% first frit, 24% second frit, 9% anorthite powder, 9% cordierite powder, 14% kaolin, 7% dolomite, and 5% calcined talc.

[0076] Comparative Example 4

[0077] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0078] The formulation of the glaze varies. In this embodiment, the raw materials for preparing the glaze, by mass percentage, include: 43% first frit, 27% second frit, 1% anorthite powder, 2% cordierite powder, 14% kaolin, 7% dolomite, and 6% calcined talc.

[0079] Comparative Example 5

[0080] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0081] The particle size of the anorthite powder varies. In this embodiment, the particle size D50 of the anorthite powder is 517 nm.

[0082] Comparative Example 6

[0083] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0084] The formulation of the base glaze varies. In this embodiment, the raw materials for preparing the base glaze, by mass percentage, include: 45% third frit, 9% titanium dioxide powder, 9% calcined talc, 5% potassium feldspar, 8% zirconium dioxide, 8% nepheline, 12% kaolin, and 4% dolomite.

[0085] Comparative Example 7

[0086] A type of plain rock ceramic brick, the preparation method of which differs from that of Example 1, is as follows:

[0087] The formulation of the base glaze varies. In this embodiment, the raw materials for preparing the base glaze, by mass percentage, include: 48% third frit, 3% titanium dioxide powder, 9% calcined talc, 5% potassium feldspar, 10% zirconium dioxide, 9% nepheline, 12% kaolin, and 4% dolomite.

[0088] The properties of the above embodiments and comparative examples were measured, wherein the gloss was measured using a gloss meter.

[0089] The smoothness is achieved through touch;

[0090] Abrasion resistance testing was conducted in accordance with GB / T 3810.7-2016.

[0091] The corresponding test results are as follows:

[0092]

[0093]

[0094] The results above show that the gloss of the low-gloss, wear-resistant ceramic tile of this invention can be maintained below 15°, meeting production requirements. When combined with appropriate texture effects, it visually resembles a real rock. In terms of wear resistance, Examples 1-3 all achieve a level 4, exhibiting a smooth texture with no roughness.

[0095] In the plain rock ceramic tile of Comparative Example 1, the amount of the first frit in its surface glaze was lower than the scope of protection of this invention. Test results showed that its gloss was higher than that of Examples 1-3, but its fineness was only average, and the texture was slightly rough. This is because reducing the amount of the first frit leads to a decrease in the melting effect during firing, resulting in excessively large anorthite or cordierite crystals formed on the surface, leading to increased glaze roughness and a corresponding decrease in fineness. Furthermore, since the crystals are polyhedral, excessively large crystals will increase the proportion of the mirror surface area to some extent, thereby increasing the gloss.

[0096] In the plain rock ceramic tile of Comparative Example 2, the amount of the first frit in its surface glaze exceeded the scope of protection of this invention. Test results showed that its gloss was higher than that of Examples 1-3, and although the texture was finer, its wear resistance decreased. This is because an excessive amount of the first frit leads to excessively strong high-temperature melting, making crystallization difficult or resulting in small crystal growth sizes. Consequently, there are fewer raised crystals on the glaze surface, weakening diffuse reflection. A smaller number of crystals also reduces the wear resistance of the glaze surface.

[0097] In the plain rock ceramic brick of Comparative Example 3, the amount of anorthite powder and cordierite powder exceeded the scope of protection of this invention. Test results showed that the gloss of the glaze met the requirements, but the fineness was poor, and it felt noticeably rough to the touch. This is because an excessive proportion of anorthite powder and cordierite powder not only increases the number of crystals but also relatively reduces the amount of frit, weakening the melting ability and thus increasing the crystal size, leading to increased roughness.

[0098] In the plain rock ceramic tile of Comparative Example 4, the amount of calcium feldspar powder and cordierite powder was less than the scope of protection of this invention. Test results showed that although the glaze had good fineness, the gloss was too high, and the wear resistance was insufficient. This is because the insufficient amount of calcium feldspar powder and cordierite powder resulted in fewer protruding crystals, leading to poor diffuse reflection and poor glaze wear resistance.

[0099] In the plain rock ceramic brick of Comparative Example 5, the particle size D50 of the anorthite powder is larger than the scope of protection of this invention. Test results show that its glaze has a higher gloss and lower fineness. This is because when the anorthite powder particle size is too large, the crystal size of the glaze after firing is too large, which weakens the diffuse reflection effect to some extent. Furthermore, the excessively large crystal size leads to increased roughness.

[0100] In the plain rock ceramic brick of Comparative Example 6, the amount of titanium dioxide powder used was greater than the protection scope of this invention. According to the test results, the gloss of the ceramic brick was too high. The reason is that when the amount of titanium dioxide powder is too high, the amount of the third frit cannot be met, resulting in the grown crystals being too small.

[0101] In the plain rock ceramic brick of Comparative Example 7, the amount of titanium dioxide powder used was less than the scope of protection of this invention. The test results showed that the gloss of the ceramic brick was too high. The reason is that if the amount of titanium dioxide powder is too small, the number of crystals will be too small, and the diffuse reflection effect will also decrease.

[0102] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A low-gloss, wear-resistant plain rock ceramic tile, characterized in that, The material comprises, from bottom to top, a body layer, a textured base glaze layer, a pattern layer, and a protective layer. The protective layer is made of a surface glaze, the raw materials of which, by mass percentage, include: 37%–43% first frit, 23%–27% second frit, 3%–7% anorthite powder, 3%–7% cordierite powder, 12%–18% kaolin, 3%–8% dolomite, and 4%–7% calcined talc. The chemical composition of the first frit, by mass percentage, includes: 35%–42% SiO2, 13%–18% Al2O3, 0.01%–0.03% Fe2O3, 0.01%–0.04% TiO2, 6%–11% CaO, 7%–12% MgO, 3%–4% K2O, 8%–13% Na2O, and ZnO. The first part contains 6.5%–8.5% B2O3, 3%–4% B2O3, with the balance being impurities; the second part contains, by mass percentage: 42%–50% SiO2, 10%–15% Al2O3, 0.01%–0.3% Fe2O3, 11%–15% CaO, 13%–16% MgO, 1%–3% K2O, 1%–3% Na2O, 2%–5% ZnO, 1%–3% BaO, with the balance being impurities.

2. The low-gloss, wear-resistant plain rock ceramic tile according to claim 1, characterized in that, The particle size D50 of the anorthite powder is 350-450 nm; the particle size D50 of the cordierite powder is 250-300 nm.

3. The low-gloss, wear-resistant plain rock ceramic tile according to claim 1, characterized in that, The uneven base glaze layer is made from a base glaze. The raw materials for preparing the base glaze, by mass percentage, include: 44%–53% third frit, 5%–7% titanium dioxide powder, 8%–11% calcined talc, 3%–6% potassium feldspar, 7%–12% zirconium dioxide, 8%–12% nepheline, 9%–15% kaolin, and 3%–6% dolomite. The chemical composition of the third frit, by mass percentage, includes: 44%–48% SiO2, 11%–15% Al2O3, 0.1%–0.3% Fe2O3, 5%–9% CaO, 3%–6% MgO, 8%–13% TiO2, 1%–4% K2O, 2%–5% Na2O, 5%–8% ZrO2, 1%–3% BaO, with the balance being impurities.

4. The low-gloss, wear-resistant plain rock ceramic tile according to claim 3, characterized in that, The D50 of the titanium dioxide powder is 750–900 nm.

5. A method for preparing ceramic bricks, characterized in that, The method for preparing the low-gloss, wear-resistant plain rock ceramic tile according to any one of claims 1-4 comprises the following steps: Apply a base glaze to the body layer to form a textured base glaze layer; Print patterns on the uneven base glaze layer to form a pattern layer; Apply a surface glaze to the pattern layer to form a protective layer; The low-gloss, wear-resistant plain rock ceramic brick is obtained by firing and polishing.

6. The method for preparing ceramic bricks according to claim 5, characterized in that, The firing temperature is 1180–1230°C.

7. The method for preparing ceramic bricks according to claim 5, characterized in that, The specific gravity of the glaze is 1.86–1.90 g / cm³. 3 .

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