Ceramic glaze with eggshell glaze texture, preparation method thereof, and ceramic rock plate

Abstract

The invention discloses a ceramic glaze with an eggshell glaze texture, a preparation method thereof, and a ceramic rock plate. The ceramic glaze comprises raw materials for preparing the ceramic glaze including textured frit dry particles, an inorganic flux, and a suspending agent. The textured frit dry particles include eggshell dry particles and fluxing dry particles. The raw material components of the eggshell dry particles comprise, by weight, 11-13 parts of adularia; 3-5 parts of berylite powder; 21.5-24.5 parts of leucite; 5-7 parts of xuyong stone powder; 2.5-3.5 parts of diaspore powder; 5-7 parts of willemite; 36-40 parts of barium strontium carbonate; and 7-9 parts of magnesite. The ceramic rock slab prepared by the present invention has appropriate gloss and transparency, and the glaze surface has a delicate, smooth and textured ceramic glaze similar to eggshell. When applied to ceramic rock slabs, it can achieve a gloss of 13-15°, a visible light transmittance of 68-70, a wear resistance of up to level 5, a hardness of more than 6, and the glaze surface has a delicate and smooth texture similar to that of an eggshell.

Description

Technical Field

[0001] The present invention belongs to the technical field of building ceramics, and in particular relates to a ceramic glaze with an eggshell glaze texture, a preparation method thereof, and a ceramic rock plate. Background Art

[0002] As people's living standards continue to improve, the demand for ceramic rock slabs is becoming increasingly diverse. Currently, ceramic rock slabs on the market have certain deficiencies in glaze texture, primarily manifested in the following aspects: First, the glaze texture of existing ceramic rock slabs is relatively rough and grainy, failing to achieve the delicate texture of an eggshell finish. Furthermore, the glaze lacks naturalness, as existing surface treatment methods struggle to simulate the characteristics of natural organic matter, resulting in a rigid texture and texture that lacks natural randomness and variability. Second, the glossiness is monotonous: either the glossy surface is too glaring, easily causing visual fatigue, or the matte surface lacks layering and three-dimensionality. The comfortable 15° textured gloss of an eggshell finish cannot be achieved, and the light transition is not delicate enough. Third, to achieve a specific glaze effect, existing technologies often add a large amount of chemicals, such as whitening agents. This not only poses potential hazards to human health but also fails to meet modern society's requirements for green and environmentally friendly materials. Fourthly, the strength and hardness are not ideal. When facing external impact and wear, scratches and cracks are prone to occur, affecting the service life and appearance of the product; the corrosion resistance and stain resistance need to be improved, and it cannot cope well with the erosion of various chemicals and the adhesion of stains, which brings difficulties to daily cleaning and maintenance.

[0003] In view of the shortcomings of existing ceramic rock slabs in terms of texture, gloss, environmental protection and durability, it is necessary to develop a new type of ceramic glaze to make the glaze surface have a delicate and natural texture like eggshell surface; as well as a comfortable eggshell surface texture gloss to enhance the comfort of the space; at the same time, while ensuring the glaze effect, reduce the use of chemical substances and improve the environmental performance of the product; and improve the durability of ceramic rock slabs such as strength, hardness, corrosion resistance and anti-fouling, thereby extending the service life of the product and reducing maintenance costs. Summary of the Invention

[0004] The present invention proposes a ceramic glaze with an eggshell glaze texture, a preparation method thereof, and a ceramic rock plate to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a ceramic glaze, the raw materials for preparing the glaze include textured frit dry particles, an inorganic flux and a suspending agent, wherein the textured frit dry particles include eggshell flour dry particles and fluxing dry particles;

[0006] The raw material components of the eggshell noodle granules include, by weight:

[0007]

[0008]

[0009] In some embodiments of the present invention, the chemical composition of the eggshell noodle dry particles includes, by weight percentage: SiO2 35-38%; Al2O3 14-15%; Na2O 3.2-4.2%; BeO 0.5-0.8%; CaO 4-5%; MgO 4-5%; ZnO 5.5-6.2%; BaO 20.5-22%; SrO 9-10.5%.

[0010] The present invention adds multiple mineral components such as adularia, syenite, leucite, willemite and diaspore, and its chemical components include SiO2, Al2O3, Na2O, BeO, CaO, MgO, ZnO, BaO, and SrO. These components interact with each other during the firing process, helping to form a unique crystal structure, thereby affecting the various properties of the glaze.

[0011] Specifically, ZnO forms a wurtzite structure, a unique lattice arrangement characterized by low symmetry and high anisotropy. When light enters this crystal structure, its propagation speed varies in different directions due to this anisotropy, resulting in refraction, with the angle of refraction varying depending on the direction. This refractive property causes light to refract and reflect multiple times within the glaze, increasing the path it takes to travel within the glaze and imparting a certain gloss to the glaze. Furthermore, due to the differences in refraction in different directions, the light reflects off the glaze with a soft and unique effect, similar to the sheen of an eggshell at specific angles. BaO reacts with other components to form a celsium-like crystal structure, which has a relatively high refractive index. When light enters, it undergoes significant refraction. The presence of celsium-like crystals in the glaze alters the path of light, causing it to refract and reflect multiple times within and on the surface, affecting the glaze's gloss. Working together with the crystal structure formed by other components, celsium-like crystals adjust the propagation and reflection of light, contributing to the eggshell-like gloss. During the firing process, components such as CaO and MgO will form crystal structures with higher hardness, such as calcium feldspar and magnesium-aluminum spinel, which is beneficial to improving the hardness and wear resistance of the glaze.

[0012] In some embodiments of the present invention, the raw material components of the inorganic flux include, by weight:

[0013]

[0014]

[0015] In some embodiments of the present invention, the chemical composition of the inorganic flux includes, by weight percentage: SiO2 47.5-57.5%; Al2O3 18-22%; Na2O 3-4%; BeO 2-3%; CaO 4-5%; MgO 4-6%; ZnO 3.5-4.5%; SrO 6.5-8.5%.

[0016] Specifically, the main chemical components of inorganic fluxes are SiO2 and Al2O3. At high temperatures, they form a silicon-oxygen tetrahedral network structure, which helps improve the rigidity and structural stability of the glaze. Working together with the textured frit particles, they increase the hardness of the glaze while maintaining a smooth and delicate finish, creating an eggshell-like glaze effect. SiO2, a glass former, helps increase the transparency and gloss of the glaze. During firing, it forms a continuous, uniform, and dense silicon-oxygen network, reducing light scattering within the glaze and allowing it to penetrate more easily. This increases transparency, reduces refraction and scattering, and creates a clearer, more transparent glaze. It also makes light more regularly reflected at the glaze-air interface, enhancing gloss, similar to the bright reflections of a smooth glass surface. Al2O3 contributes to glaze stability and hardness, and indirectly affects gloss. Al2O3 can form stable compounds or solid solutions with other components to prevent changes or defects in the crystal structure when the glaze cools. For example, it combines with metal oxides to form an aluminate phase, resisting the influence of external environmental factors and maintaining the integrity and quality of the glaze. It can also be filled in the crystal structure of the glaze to increase the bonding force between crystals, making the glaze stronger, reducing scratches and damage under external forces, simulating the surface texture of eggshells, and achieving a surface texture similar to that of eggshells.

[0017] In some embodiments of the present invention, the calcination temperature of the Xuyong stone powder is 800-900° C. and the calcination time is 2-3 hours. Calcination of the Xuyong stone powder is beneficial to improving the stability and hardness of the glaze.

[0018] In some embodiments of the present invention, the particle size of the textured frit dry particles is 180-280 mesh, and the particle size deviation range is within ±8%.

[0019] In some embodiments of the present invention, the inorganic flux powder has a particle size of 200-350 meshes, and a particle size deviation range of within ±10%.

[0020] Specifically, controlling the particle size of the textured frit to a relatively fine range facilitates better fusion during firing, reducing surface porosity and unevenness, and enhancing the fineness and smoothness of the glaze. When mixed with the textured frit, the inorganic flux powder fills the voids, further increasing the density, fineness, and smoothness of the glaze, improving the quality of the glaze.

[0021] In some embodiments of the present invention, the raw material components of the fluxing dry particles include, by weight:

[0022]

[0023]

[0024] In some embodiments of the present invention, the chemical composition of the fluxing dry particles includes, by weight percentage: SiO2 42-46%; Al2O3 14-16.5%; K2O 4-5%; BeO 4-6%; CaO 12-13%; MgO 3.3-4%; ZnO 1.5-1.9%; BaO 5.5-6.8%; and SrO 6.5-8.5%.

[0025] Specifically, the chemical composition of the fluxing dry particles is similar to that of the eggshell flour dry particles, with only the amounts of each component differing. The fluxing dry particles contain a higher content of flux-like components, which can change the chemical environment of the system during the firing process, better control the formation and growth of the crystal structure, and optimize the performance of the glaze. The fluxing dry particles and the eggshell flour dry particles work together to make the crystal structure formed during the firing process more dense and uniform. This dense and uniform crystal structure not only helps to improve the mechanical properties of the glaze, but also further optimizes the optical properties of the glaze, such as gloss and transparency, to achieve a delicate, smooth, and textured glaze effect similar to that of an eggshell.

[0026] In some embodiments of the present invention, the particle size of the fluxing dry particles is 200-300 mesh, and the particle size deviation range is within ±7%.

[0027] Specifically, when the fluxing dry particles are mixed with the eggshell dry particles, the two dry particles with different particle size ranges can fill the gaps between each other, further improving the density of the glaze surface. This is not only beneficial to improving the mechanical properties of the glaze surface, but also can further improve the fineness and smoothness of the glaze surface, making it closer to the texture of the eggshell surface.

[0028] In some embodiments of the present invention, the mass ratio of the textured frit dry particles to the inorganic flux is 1:(0.8-1.2).

[0029] In some embodiments of the present invention, the mass ratio of the eggshell noodle dry particles to the fluxing dry particles is 1:(0.8-1.2).

[0030] In some embodiments of the present invention, the amount of the suspending agent is 1-2 wt % of the inorganic flux.

[0031] In some embodiments of the present invention, the suspending agent includes at least two of sodium polyacrylate, sodium carboxymethyl cellulose, xanthan gum, and sodium polycarboxylate.

[0032] Specifically, the combined use of multiple suspending agents is more conducive to improving the uniformity of raw material dispersion and thus improving the overall performance of the glaze compared to a single suspending agent. Among them: sodium polyacrylate can interact with the surface of raw material particles through the polar groups in its molecular structure, reduce the attraction between particles, and make the raw materials easier to disperse in the solvent. Sodium carboxymethyl cellulose has good water solubility and thickening properties, and can form a stable colloidal structure in the solution, prevent the precipitation of raw material particles, and ensure that the raw materials are evenly distributed in the glaze slurry. Xanthan gum and sodium polycarboxylate can increase the viscosity of the solution, so that the raw material particles remain suspended in the solution, thereby improving the uniformity of the raw material dispersion. The evenly dispersed raw materials are conducive to forming a denser crystal structure in the subsequent firing process, and the bonding force between the crystals is stronger, thereby improving the hardness and wear resistance of the glaze surface. At the same time, the uniform glaze surface is more delicate and smooth in appearance, and is closer to the texture of eggshell surface.

[0033] A second aspect of the present invention provides a method for preparing the above-mentioned ceramic glaze, characterized in that it comprises the following steps:

[0034] (1) mixing the raw materials for preparing the inorganic flux, and performing wet ball milling to obtain an inorganic flux slurry;

[0035] (2) adding the eggshell flour dry particles and the fluxing dry particles into the inorganic flux slurry, adding a suspending agent, and mixing to obtain the ceramic glaze.

[0036] In some embodiments of the present invention, the viscosity of the inorganic flux slurry is 500-800 mPa·s.

[0037] The third aspect of the present invention provides a ceramic rock plate, which comprises, from bottom to top, a body layer, a surface glaze layer, a pattern layer and an eggshell-surface textured glaze layer, wherein the eggshell-surface textured glaze layer is formed by firing the above-mentioned ceramic glaze.

[0038] In some embodiments of the present invention, the maximum firing temperature is 1200-1220°C.

[0039] In some embodiments of the present invention, the firing period is 40-60 minutes.

[0040] In some embodiments of the present invention, a protective glaze layer is further included between the pattern layer and the eggshell texture glaze layer.

[0041] The present invention has no special requirements for the raw material components of the body layer, the surface glaze layer and the protective glaze layer, and the body, surface glaze and protective glaze of conventional ceramic rock slabs can be used.

[0042] Compared with the prior art, the above technical solution of the present invention has at least the following technical effects or advantages:

[0043] The present invention uses adularia, berylite powder, leucite, xuyong stone powder, diaspore powder, willemite, barium strontium carbonate and magnesite as raw materials to prepare eggshell flour dry particles, fully exerts the effective chemical composition of each raw material, utilizes the characteristics of each raw material and the interaction between the raw materials, and is simultaneously prepared with a certain amount of fluxing dry particles, inorganic flux and suspending agent; by optimizing and reasonably compounding each raw material and controlling the particle size of each raw material, a ceramic glaze with appropriate gloss and transparency and a glaze surface having a delicate, smooth and textured texture similar to that of an eggshell is prepared; when the ceramic glaze is applied to a ceramic rock plate, a gloss of 13-15°, a visible light transmittance of 68-70, a wear resistance of up to level 5, a hardness of more than 6, and a glaze surface having a delicate and smooth texture similar to that of an eggshell can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a photo of the glaze surface of the ceramic rock plate prepared in Example 1;

[0045] Figure 2 This is a physical picture of the glaze surface of the ceramic rock plate prepared in Comparative Example 1;

[0046] Figure 3 This is a physical picture of the glaze surface of the ceramic rock plate prepared in Comparative Example 3;

[0047] Figure 4 This is a photo of the glaze surface of the ceramic rock plate prepared in Comparative Example 4;

[0048] Figure 5 This is a real picture of the glaze of the ceramic rock slab prepared in Comparative Example 6. DETAILED DESCRIPTION

[0049] The present invention is described in detail below with reference to the examples to facilitate understanding of the present invention by those skilled in the art. It is necessary to point out that the examples are only used to further illustrate the present invention and are not to be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above-mentioned invention should still fall within the scope of protection of the present invention. At the same time, the raw materials mentioned below that are not described in detail are all commercially available products; the process steps or preparation methods that are not mentioned in detail are all process steps or preparation methods known to those skilled in the art.

[0050] The raw material components of the green body used in the examples and comparative examples of the present invention include, by weight, 35 parts of kaolin, 30 parts of feldspar, 20 parts of quartz, 15 parts of clay, and 5 parts of talc.

[0051] The raw material components of the surface glaze layer include, by weight: 40 parts of potassium feldspar, 20 parts of calcite, 15 parts of dolomite, 5 parts of zinc oxide, 15 parts of quartz, 8 parts of calcined talc, and 1 part of sodium carboxymethyl cellulose (CMC).

[0052] Example 1

[0053] A ceramic glaze is prepared by preparing raw materials comprising, by weight, 100 parts of textured frit dry particles, 100 parts of inorganic flux, and 1.5 parts of suspending agent, wherein the textured frit dry particles comprise eggshell flour dry particles and fluxing dry particles in a mass ratio of 1:1.

[0054] Among them: the raw material components of the eggshell noodle granules include, by weight:

[0055]

[0056] The chemical composition of the eggshell noodle granules includes, by weight percentage: SiO2 36%; Al2O3 14.5%; Na2O 3.7%; BeO 0.65%; CaO 4.5%; MgO 4.5%; ZnO 5.8%; BaO 20.6%; and SrO 9.75%.

[0057] The raw material components of the inorganic flux include, by weight:

[0058]

[0059]

[0060] The chemical composition of the inorganic flux includes, by weight percentage: SiO2 62.5%; Al2O3 24%; Na2O3 3.5%; BeO 2.5%; CaO 4.5%; MgO 5%; ZnO 4%; and SrO 7.5%.

[0061] The raw material components of the fluxing dry particles include, by weight:

[0062]

[0063] The chemical composition of the fluxing dry particles includes, by weight percentage: SiO2 44%; Al2O3 15%; K2O 4.5%; BeO 5%; CaO 12.5%; MgO 3.65%; ZnO 1.7%; BaO 6%; and SrO 6.85%.

[0064] The suspending agent comprises sodium carboxymethyl cellulose, xanthan gum and sodium polycarboxylate in a mass ratio of 3:3:4.

[0065] The method for preparing the ceramic glaze comprises the following steps:

[0066] (1) According to the raw material ratio, the raw materials for preparing the inorganic flux were weighed, and deionized water was added for wet ball milling (the mass ratio of the material to the water was 1:1.75) and sodium polyacrylate (the addition amount was 1.5% of the total mass of the inorganic flux). The mixture was stirred at a speed of 900 rpm for 1.5 hours to obtain an inorganic flux slurry with a viscosity of 650 mPa·s, a particle size of 200 mesh, and a particle size deviation range of within ±10%;

[0067] (2) weighing the raw materials for preparing the eggshell noodle dry granules according to the raw material ratio, melting them, pouring them into water and quenching them to obtain frit particles; then crushing the frit particles to obtain eggshell noodle dry granules with a particle size of 180 mesh and a particle size deviation range of within ±8%;

[0068] (3) weighing the raw materials for preparing the fluxing dry granules according to the raw material ratio, melting them and pouring them into water for quenching to obtain frit granules; then crushing the frit granules to obtain fluxing dry granules with a particle size of 250 mesh and a particle size deviation range of within ±7%;

[0069] (4) Add the eggshell flour dry particles and fluxing dry particles to the inorganic flux slurry, add a suspending agent, and mix well to obtain the ceramic glaze of the present embodiment.

[0070] A method for preparing a ceramic rock plate comprises the following steps:

[0071] The surface glaze, inkjet printed pattern and the above-mentioned ceramic glaze are sequentially applied on the blank to form the surface glaze layer, pattern layer and eggshell texture glaze layer in sequence. After drying, it is put into the kiln and fired at 1220°C for 60 minutes to obtain the ceramic rock plate of this embodiment.

[0072] Example 2

[0073] A ceramic glaze is prepared by preparing raw materials comprising, by weight, 100 parts of textured frit dry particles, 90 parts of inorganic flux, and 1.35 parts of suspending agent, wherein the textured frit dry particles comprise eggshell flour dry particles and fluxing dry particles in a mass ratio of 1:1.2.

[0074] Among them: the raw material components of the eggshell noodle granules include, by weight:

[0075]

[0076] The chemical composition of the eggshell noodle granules includes, by weight percentage, 35.5% SiO2, 14.5% Al2O3, 3.7% Na2O, 0.65% BeO, 4.5% CaO, 4.5% MgO, 5.85% ZnO, 21.25% BaO, and 9.55% SrO.

[0077] The raw material components of the inorganic flux include, by weight:

[0078]

[0079] The chemical composition of the inorganic flux, by weight percentage, includes: SiO2 52.5%; Al2O3 20.5%; Na2O3.5%; BeO 2.5%; CaO 4.5%; MgO 5%; ZnO 4%; and SrO 7.5%.

[0080] The raw material components of the fluxing dry particles include, by weight:

[0081]

[0082]

[0083] The chemical composition of the fluxing dry particles, by weight percentage, includes: SiO2 44%; Al2O3 15%; K2O 4.5%; BeO 5%; CaO 12.5%; MgO 3.65%; ZnO 1.7%; BaO 6%; and SrO 7.65%.

[0084] The suspending agent comprises sodium carboxymethyl cellulose, xanthan gum and sodium polycarboxylate in a mass ratio of 3:3:4.

[0085] The method for preparing the ceramic glaze comprises the following steps:

[0086] (1) According to the raw material ratio, the raw materials for preparing the inorganic flux were weighed, and deionized water was added for wet ball milling (the mass ratio of the material to the water was 1:1.75) and sodium polyacrylate (the amount added was 1.5% of the total mass of the inorganic flux). The mixture was stirred at a speed of 900 rpm for 1.5 hours to obtain an inorganic flux slurry with a viscosity of 650 mPa·s, a particle size of 350 mesh, and a particle size deviation range of within ±10%;

[0087] (2) weighing the raw materials for preparing the eggshell noodle dry granules according to the raw material ratio, melting them, pouring them into water and quenching them to obtain frit particles; then crushing the frit particles to obtain eggshell noodle dry granules with a particle size of 280 mesh and a particle size deviation range of within ±8%;

[0088] (3) weighing the raw materials for preparing the fluxing dry granules according to the raw material ratio, melting them and pouring them into water for quenching to obtain frit particles; then crushing the frit particles to obtain fluxing dry granules with a particle size of 300 mesh and a particle size deviation range of within ±7%;

[0089] (4) Add the eggshell flour dry particles and fluxing dry particles to the inorganic flux slurry, add a suspending agent, and mix well to obtain the ceramic glaze of the present embodiment.

[0090] A method for preparing a ceramic rock plate comprises the following steps:

[0091] The surface glaze, inkjet printed pattern and the above-mentioned ceramic glaze are sequentially applied on the blank to form the surface glaze layer, pattern layer and eggshell texture glaze layer in sequence. After drying, it is put into the kiln and fired at 1220°C for 60 minutes to obtain the ceramic rock plate of this embodiment.

[0092] Example 3

[0093] A ceramic glaze is prepared by preparing raw materials comprising, by weight, 100 parts of textured frit dry particles, 100 parts of inorganic flux, and 1.5 parts of suspending agent, wherein the textured frit dry particles comprise eggshell flour dry particles and fluxing dry particles in a mass ratio of 1:1.

[0094] Among them: the raw material components of the eggshell noodle granules include, by weight:

[0095]

[0096]

[0097] The chemical composition of the eggshell noodle granules includes, by weight percentage: SiO2 36%; Al2O3 14.5%; Na2O 3.7%; BeO 0.65%; CaO 4.5%; MgO 4.5%; ZnO 5.8%; BaO 20.6%; and SrO 9.75%.

[0098] The raw material components of the inorganic flux include, by weight:

[0099]

[0100] The chemical composition of the inorganic flux, by weight percentage, includes: SiO2 52.5%; Al2O3 20%; Na2O 4%; BeO 2.5%; CaO 4.5%; MgO 5%; ZnO 4%; and SrO 7.5%.

[0101] The raw material components of the fluxing dry particles include, by weight:

[0102]

[0103] The chemical composition of the fluxing dry particles, by weight percentage, includes: SiO2 44%; Al2O3 15%; K2O 4.5%; BeO 5%; CaO 12.5%; MgO 3.65%; ZnO 1.7%; BaO 6%; and SrO 7.65%.

[0104] The suspending agent comprises sodium carboxymethyl cellulose, xanthan gum and sodium polycarboxylate in a mass ratio of 3:3:4.

[0105] The method for preparing the ceramic glaze comprises the following steps:

[0106] (1) According to the raw material ratio, the raw materials for preparing the inorganic flux were weighed, and deionized water was added for wet ball milling (the mass ratio of the material to the water was 1:1.75) and sodium polyacrylate (the addition amount was 1.5% of the total mass of the inorganic flux). The mixture was stirred at a speed of 900 rpm for 1.5 hours to obtain an inorganic flux slurry with a viscosity of 650 mPa·s, a particle size of 300 mesh, and a particle size deviation range of within ±10%;

[0107] (2) weighing the raw materials for preparing the eggshell noodle dry granules according to the raw material ratio, melting them, pouring them into water and quenching them to obtain frit particles; then crushing the frit particles to obtain eggshell noodle dry granules with a particle size of 260 mesh and a particle size deviation range of within ±8%;

[0108] (3) weighing the raw materials for preparing the fluxing dry granules according to the raw material ratio, melting them and pouring them into water for quenching to obtain frit granules; then crushing the frit granules to obtain fluxing dry granules with a particle size of 250 mesh and a particle size deviation range of within ±7%;

[0109] (4) Add the eggshell flour dry particles and fluxing dry particles to the inorganic flux slurry, add a suspending agent, and mix well to obtain the ceramic glaze of the present embodiment.

[0110] A method for preparing a ceramic rock plate comprises the following steps:

[0111] The surface glaze, inkjet printed pattern and the above-mentioned ceramic glaze are sequentially applied on the blank to form the surface glaze layer, pattern layer and eggshell texture glaze layer in sequence. After drying, it is put into the kiln and fired at 1220°C for 60 minutes to obtain the ceramic rock plate of this embodiment.

[0112] Comparative Example 1

[0113] The only difference between Comparative Example 1 and Example 1 is that an equal amount of potassium feldspar is used instead of adularia in the raw material component of the eggshell flour dry particles in the ceramic glaze of Comparative Example 1.

[0114] Comparative Example 2

[0115] The only difference between Comparative Example 2 and Example 1 is that no silicate stone powder is added to the raw material components of the eggshell flour dry particles in the ceramic glaze of Comparative Example 2.

[0116] Comparative Example 3

[0117] The only difference between Comparative Example 3 and Example 1 is that no diaspore powder is added to the raw material components of the eggshell flour dry particles in the ceramic glaze of Comparative Example 3.

[0118] Comparative Example 4

[0119] The only difference between Comparative Example 4 and Example 1 is that the ceramic glaze of Comparative Example 4 does not contain an inorganic flux.

[0120] Comparative Example 5

[0121] The only difference between Comparative Example 5 and Example 1 is that the particle sizes of the textured frit dry particles and the inorganic flux in the ceramic glaze of Comparative Example 5 are the same, both 180-280 mesh, and the particle size deviation range is within ±8%.

[0122] Comparative Example 6

[0123] The only difference between Comparative Example 6 and Example 1 is that the suspending agent in the ceramic glaze of Comparative Example 6 is a single sodium carboxymethyl cellulose.

[0124] Performance Testing

[0125] The ceramic rock slab samples prepared in Examples 1-3 and Comparative Examples 1-6 were tested for Mohs hardness, wear resistance, glossiness, and light transmittance of the eggshell-textured glaze. Wear resistance was tested in accordance with GB / T3810.7-2016, "Determination of Surface Abrasion Resistance of Ceramic Glazed Tiles." Light transmittance was measured in accordance with GB2680-2021, "Architectural Glass - Determination of Visible Light Transmittance, Direct Solar Transmittance, Total Solar Transmittance, Ultraviolet Transmittance, and Related Window Glass Parameters." The test results are shown in Table 1.

[0126] Table 1:

[0127]

[0128] As shown in Table 1, the glossiness of the ceramic rock slabs prepared in Examples 1-3 is 13-15°, which is similar to the glossiness of the eggshell surface. The glaze surface has a high hardness of more than 6, and the wear resistance level can reach the highest level 5. The glaze surface has good light transmittance, with a visible light transmittance of 68-70%. The glaze surface has a delicate and smooth texture like the eggshell surface. Figure 1 shown.

[0129] Comparative Examples 1-3 Compared with Example 1, since potassium feldspar is used instead of adularia in the raw material components of the eggshell flour dry particles in the ceramic glaze, and beryllium silicate powder and diaspore powder are not added, the glossiness and light transmittance of the glaze surface are reduced to a certain extent, resulting in a decrease in the texture and fineness of the glaze surface. Figure 2 ; There are even glaze defects such as cracks, see Figure 3 ; At the same time, hardness and wear resistance also decrease.

[0130] Comparative Example 4 Compared with Example 1, since the ceramic glaze does not contain inorganic flux, a good silicon-oxygen tetrahedron network structure cannot be formed, the density of the glaze surface decreases, and light scattering is serious, resulting in a significant decrease in the hardness and wear resistance of the glaze surface, as well as the glossiness and light transmittance, resulting in a dull glaze surface and the presence of concave glaze phenomenon. Figure 4 .

[0131] Comparative Example 5 Compared with Example 1, since the particle size of the textured frit dry particles and the inorganic flux in the ceramic glaze is the same, the growth and distribution of crystals in the glaze layer are affected, resulting in a decrease in the hardness and wear resistance of the glaze surface, and poor glaze surface uniformity.

[0132] Comparative Example 6 Compared with Example 1, the suspending agent in the ceramic glaze is a single sodium carboxymethyl cellulose, which leads to a decrease in the dispersion and suspension of the glaze slurry, resulting in a slight decrease in the hardness, wear resistance and light transmittance of the glaze surface, and poor glaze uniformity. Figure 5 .

[0133] For those skilled in the art to which the present invention belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, without having to resort to creative work. Therefore, based on the disclosure of the present invention, simple improvements made by those skilled in the art to the present invention should be within the scope of protection of the present invention. The above embodiments are preferred embodiments of the present invention, and all processes similar to the present invention and equivalent changes made should fall within the scope of protection of the present invention.

Claims

1. A ceramic glaze, characterized in that: The raw materials for its preparation include textured frit dry particles, inorganic flux and suspending agent, wherein the textured frit dry particles include eggshell flour dry particles and fluxing dry particles; The raw material components of the eggshell noodle granules include, by weight: Adularia 11-13 parts; 3-5 parts of beryllium silicate powder; Leucite 21.5-24.5 parts; 5-7 parts of Xuyong stone powder; 2.5-3.5 parts of diaspore powder; 5-7 parts of willemite; 36-40 parts of barium strontium carbonate; 7-9 parts of magnesite; The suspending agent includes at least two of sodium polyacrylate, sodium carboxymethyl cellulose, xanthan gum, and sodium polycarboxylate; The textured frit dry particles and the inorganic flux have different particle sizes.

2. The ceramic glaze according to claim 1, characterized in that The raw material components of the inorganic flux include, by weight: 38-42 parts of adularia; 7-9 parts of water-washed soil; 4-6 parts of beryllium silicate powder; 7-9 parts of calcined Xuyong stone powder; Wollastonite 2.5-3.5 parts; Dolomite 13.5-16.5 parts; 7-9 parts of burnt talc; 3.5-4.5 parts of willemite; 6.5-8.5 parts of strontium carbonate; 1-2 parts of diaspore powder.

3. The ceramic glaze according to claim 1 or 2, characterized in that The particle size of the textured frit dry particles is 180-280 mesh, with a particle size deviation range of within ±8%; and / or the particle size of the inorganic flux powder is 200-350 mesh, with a particle size deviation range of within ±10%.

4. The ceramic glaze according to claim 1, characterized in that The raw material components of the fluxing dry particles include, by weight: Potassium feldspar 25-29 parts; 23-27 parts of leucite; 9-11 parts of beryllium silicate powder; 4-6 parts of Xuyong stone powder; 3.5-4.5 parts of diaspore powder; 3.5-4.5 parts of willemite; 0.4-1 part of strontium carbonate; 12-14 parts of barium strontium carbonate; 6-8 parts of magnesite.

5. The ceramic glaze according to claim 1 or 4, characterized in that: The particle size of the fluxing dry particles is 200-300 meshes, and the particle size deviation range is within ±7%.

6. The ceramic glaze according to claim 1, characterized in that The mass ratio of the textured frit dry particles to the inorganic flux is 1:(0.8-1.2); and / or, the mass ratio of the eggshell flour dry particles to the fluxing dry particles is 1:(0.8-1.2); and / or, the amount of the suspending agent is 1-2wt% of the inorganic flux.

7. A method for preparing a ceramic glaze according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Mixing the raw materials for preparing the inorganic flux and performing wet ball milling to obtain an inorganic flux slurry; (2) Adding the eggshell flour dry particles and the flux dry particles into the inorganic flux slurry, adding a suspending agent, and mixing to obtain the ceramic glaze.

8. A ceramic rock plate, characterized in that: From bottom to top, it comprises a body layer, a surface glaze layer, a pattern layer and an eggshell surface texture glaze layer, and the eggshell surface texture glaze layer is fired by the ceramic glaze according to any one of claims 1-6.

9. The ceramic rock plate according to claim 8, characterized in that: The firing temperature is 1200-1220° C.; and / or the firing period is 40-60 minutes.

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