A matt crystalline glaze ceramic tile and a method for manufacturing the same

Abstract

This invention relates to the field of ceramic technology and discloses a matte crystalline glaze ceramic tile and its preparation method. The matte crystalline glaze ceramic tile includes a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a top glaze layer disposed on the ink printing layer. The raw material for preparing the glaze dots includes zirconium silicate; the raw material for preparing the top glaze layer includes zinc oxide. By increasing the melting temperature of the base glaze layer, the top glaze layer can reach the melting state first and initiate the crystallization process during the ceramic tile firing process. The base glaze layer can maintain a relatively stable solid phase structure, thereby restricting the overall flow of the glaze layer and avoiding the aggregation and growth of point crystals. This results in a matte glaze effect on the surface of the crystalline glaze ceramic tile, rather than a glossy effect caused by the aggregation and growth of crystalline phases. This fundamentally changes the technical limitation of traditional crystalline glaze ceramic tiles, which can only form a glossy effect.

Description

Technical Field

[0001] This invention relates to the field of ceramic technology, and in particular to a matte crystalline glaze ceramic tile and its preparation method. Background Technology

[0002] Crystalline glaze ceramic tiles, with their unique crystalline texture, hold a significant market share in the architectural decoration field. Currently, however, crystalline glaze ceramic tile products in the industry generally suffer from technological limitations. Firstly, existing crystalline glaze ceramic tiles offer only one type of surface gloss; almost all commercially available products have a glossy finish. Secondly, the crystal structure within the glaze layer is uncontrollable. Traditional processes typically employ a monolithic crystallization approach, resulting in uneven crystal size and chaotic distribution, failing to meet diverse decorative needs. Furthermore, existing crystalline glaze ceramic tile products largely rely on oxide coloring, which is prone to reacting with substances in the glaze layer, leading to unstable color development. Additionally, in existing crystalline glaze ceramic tiles, the ink printing layer is generally placed on the surface of the glaze layer, but the ink often fails to develop color on the glaze surface, preventing patterns and designs from appearing on the crystalline glaze product, severely limiting its decorative appeal and market competitiveness. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a matte crystalline glaze ceramic tile and its preparation method, which aims to solve the problem that the existing crystalline glaze ceramic tiles have a single type of surface gloss and the tile surface is mostly glossy.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of the present invention provides a matte crystalline glaze ceramic tile, comprising a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer; the raw material for preparing the glaze dots includes zirconium silicate; the raw material for preparing the surface glaze layer includes zinc oxide. The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 16-20 parts, sodium feldspar 18-22 parts, calcined kaolin 13-17 parts, calcite 8-12 parts, black mud powder 8-12 parts, barium carbonate 6-10 parts, quartz 5-9 parts, calcined talc 3-7 parts, alumina 3-7 parts, zinc oxide 1-3 parts, colorant 2-4 parts.

[0005] In the aforementioned matte crystalline glaze ceramic tile, the raw materials for preparing the glaze application points further include a base glaze; by weight, the raw materials for preparing the base glaze include: Potassium feldspar 16-20 parts, sodium feldspar 18-22 parts, calcined kaolin 13-17 parts, calcite 8-12 parts, black mud powder 8-12 parts, barium carbonate 6-10 parts, quartz 5-9 parts, calcined talc 3-7 parts, alumina 3-7 parts, zinc oxide 1-3 parts, colorant 2-4 parts.

[0006] In the matte crystalline glaze ceramic tile, the base glaze and zirconium silicate are mixed in a weight ratio of (94-96):(4-6).

[0007] In the aforementioned matte crystalline glaze ceramic tile, the raw materials for preparing the surface glaze layer, by weight, include: 23-27 parts potassium feldspar, 8-12 parts barium carbonate, 8-12 parts quartz, 23-27 parts calcite, and 28-32 parts zinc oxide.

[0008] In the aforementioned matte crystalline glaze ceramic tile, the colorant is cobalt blue.

[0009] A second aspect of the present invention provides a method for preparing the matte crystalline glaze ceramic tile as described above, comprising the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

[0010] In the preparation method of the matte crystalline glaze ceramic tile, the specific gravity of the base glaze slurry in step S04 is 1.48–1.52 g / cm³. 3 .

[0011] In the preparation method of the matte crystalline glaze ceramic tile, the specific gravity of the glaze slurry in step S05 is 1.50–1.60 g / cm³. 3 The glaze slurry is sprayed using a spray glazing method, with a spray air pressure of 0.13 to 0.22 MPa.

[0012] In the preparation method of the matte crystalline glaze ceramic tile, the specific gravity of the surface glaze slurry in step S07 is 1.50–1.60 g / cm³. 3 The surface glaze is applied by spraying glaze.

[0013] In the preparation method of the matte crystalline glaze ceramic tile, the highest firing temperature in step S08 is 1190-1210℃, and the firing cycle is 38-42 minutes.

[0014] Beneficial effects: The first aspect of this invention provides a matte crystalline glaze ceramic tile. By setting randomly distributed glaze-spraying points made of zirconium silicate on the base glaze layer, precise nucleation sites can be provided for the point-like crystallization of crystalline components, achieving continuous variation in the size and distribution density of crystallization points. This solves the problems of uneven crystal size and disordered distribution in traditional crystalline glazes. Furthermore, by increasing the melting temperature of the base glaze layer, the surface glaze layer can reach the melting state and initiate the crystallization process first during the ceramic tile firing process. The base glaze layer can maintain a relatively stable solid phase structure, thereby restricting the overall flow of the glaze layer and preventing the aggregation and growth of point-like crystals. As a result, the glaze surface of the crystalline glaze ceramic tile does not have a glossy effect caused by the aggregation and growth of crystalline phases, but instead achieves a matte glaze effect. This fundamentally changes the technical limitation of traditional crystalline glaze ceramic tiles, which can only form a glossy effect.

[0015] The second aspect of this invention provides a method for preparing matte crystalline glaze ceramic tiles. The preparation method can be implemented on a large scale using existing ceramic tile production lines, and the process is highly stable, making it easy to promote industrialization and mass production. It can efficiently prepare crystalline glaze ceramic tiles with a matte glaze effect and good color consistency between batches. Attached Figure Description

[0016] Figure 1 This is a flowchart of the preparation method of the matte crystalline glaze ceramic tile provided by the present invention.

[0017] Figure 2 This is a photograph of the crystalline glaze ceramic brick from Example 1.

[0018] Figure 3 This is a photograph of the crystalline glaze ceramic brick from Example 2.

[0019] Figure 4 This is a photograph of the crystalline glaze ceramic brick from Example 3.

[0020] Figure 5 This is a picture of the actual crystalline glaze ceramic tile used in Comparative Example 2.

[0021] Figure 6 This is a picture of the actual crystalline glaze ceramic tile in Comparative Example 3.

[0022] Figure 7This is a picture of the actual crystalline glaze ceramic tile in Comparative Example 4.

[0023] Figure 8 This is a picture of the actual crystalline glaze ceramic tile in Comparative Example 5.

[0024] Figure 9 This is a picture of a crystalline glaze ceramic tile, which is shown in Comparative Example 6.

[0025] Figure 10 This is a picture of the actual crystalline glaze ceramic tile in Comparative Example 7. Detailed Implementation

[0026] This invention provides a matte crystalline glaze ceramic tile 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.

[0027] The first aspect of the present invention provides a matte crystalline glaze ceramic tile, comprising a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer; the raw material for preparing the glaze dots includes zirconium silicate; the raw material for preparing the surface glaze layer includes zinc oxide.

[0028] In the matte crystalline glaze ceramic tile provided by this invention, the base glaze layer serves as a basic covering layer for the tile body, effectively concealing impurities and black spots on the body itself, preventing the base color from showing through the surface glaze and affecting the color and gloss of the ceramic tile. Simultaneously, the base glaze layer seals the pores of the tile body, preventing gases from escaping upwards during firing and avoiding defects such as pinholes and bubbles in the surface glaze. The raw material for preparing the glaze dots includes zirconium silicate, which has a high melting point and chemical stability, does not melt during glaze firing, and can exist as a heterogeneous nucleating agent in the glaze layer. Furthermore, the glaze dots are randomly distributed on the surface of the base glaze layer in the form of capillary points, making each glaze dot an independent nucleation center. When the surface glaze layer melts, zinc ions and silicate ions in the surface glaze layer diffuse towards the nucleation center, undergoing heterogeneous nucleation and directional growth on the surface of the zirconium silicate particles, ultimately forming dot-like crystals with zirconium silicate as the core.

[0029] Furthermore, by weight, the raw materials for preparing the base glaze layer include: Potassium feldspar 16-20 parts, sodium feldspar 18-22 parts, calcined kaolin 13-17 parts, calcite 8-12 parts, black mud powder 8-12 parts, barium carbonate 6-10 parts, quartz 5-9 parts, calcined talc 3-7 parts, alumina 3-7 parts, zinc oxide 1-3 parts, colorant 2-4 parts.

[0030] In the raw materials for preparing the base glaze layer, potassium feldspar mainly acts as a flux, promoting the formation of the glassy phase in the glaze layer and accelerating the maturation of the glaze. Sodium feldspar also has a fluxing effect, improving the fluidity of the glaze layer. Furthermore, sodium feldspar and potassium feldspar synergistically control the thermal expansion coefficient of the base glaze layer, enhancing the bond between the base glaze layer and the body. Calcite decomposes at high temperatures to generate CaO, which can regulate the high-temperature viscosity of the glaze and promote the uniform penetration and diffusion of color-producing ions in the pigments, thus reducing color differences within the same batch of products. Zinc oxide provides a gentle flux, promoting the uniform formation of the glassy phase in the base glaze layer and blocking the channels for gas rise in the brick body, effectively improving defects such as pinholes and bubbles in the overall glaze layer.

[0031] To increase the melting temperature of the base glaze layer, allowing the top glaze layer to reach a molten state and initiate the crystallization process first during ceramic tile firing, calcined kaolin is used in a high proportion of the raw materials for preparing the base glaze layer. As a high-alumina, high-temperature resistant raw material, calcined kaolin can raise the melting temperature of the base glaze layer, making it higher than that of the top glaze layer. After the top glaze layer reaches a molten state, the base glaze layer can maintain a relatively stable solid phase structure, thereby restricting the overall flow of the glaze layer and preventing the aggregation and growth of point crystals. Therefore, the glaze surface of crystalline glaze ceramic tiles will not have the glossy effect caused by the aggregation and growth of crystalline phases, but will achieve a matte glaze effect, thus fundamentally changing the technical limitation of traditional crystalline glaze ceramic tiles that can only produce a glossy effect.

[0032] Furthermore, in the raw materials for preparing the base glaze layer, barium carbonate decomposes at high temperatures to produce BaO. BaO can reduce the surface tension of the glaze at high temperatures, improve the smoothness of the glaze surface, and reduce defects such as pinholes in the glaze layer. At the same time, BaO can inhibit excessive flow of the glaze layer at high temperatures and balance the strong fluxing effect brought by feldspar and calcite, ensuring that the melting temperature of the base glaze is not too low. Calcined talc decomposes at high temperatures to produce MgO. In a glaze system with feldspar as the main component, MgO can inhibit excessive grain growth at high temperatures and refine the microstructure, thereby helping to achieve a matte finish on the glaze surface. Quartz can provide silica to the base glaze layer. Silica is the main glass-forming material in the glaze layer, which can improve the overall hardness, wear resistance, and stain resistance of the glaze layer. In addition, the base glaze layer can increase the melting temperature of the base glaze, maintain the semi-solid rigidity of the base glaze, and constrain the growth of crystalline phases. Alumina can increase the melting temperature and high-temperature viscosity of the base glaze layer. Furthermore, the combination of alumina, calcined kaolin, and black mud powder can synergistically adjust the thermal expansion coefficient of the base glaze layer, matching it with that of the brick body layer. This ensures the bonding strength between the base glaze layer and the brick body layer, thus providing a stable foundation for the color development of crystalline glaze ceramic tiles.

[0033] In summary, this invention, through the synergistic effect of the raw materials in the base glaze layer, ensures the overall bonding strength between the matte crystalline glaze ceramic tile glaze layer and the tile body layer, providing a stable color development foundation for the colorants in the glaze layer. Furthermore, the increased melting temperature of the base glaze layer creates a melting temperature gradient throughout the glaze layer, preventing the aggregation and growth of point-like crystals. This enables the preparation of matte-textured crystalline glaze ceramic tile products, solving the problem of the single gloss level and the difficulty in consistently achieving a matte effect with traditional crystalline glazes.

[0034] To ensure a strong chemical bond between the glaze dots and the base glaze layer, and to prevent defects such as delamination and peeling, in a preferred embodiment, the raw materials for preparing the glaze dots further include a base glaze. By weight, the base glaze comprises: 16-20 parts potassium feldspar, 18-22 parts sodium feldspar, 13-17 parts calcined kaolin, 8-12 parts calcite, 8-12 parts black mud powder, 6-10 parts barium carbonate, 5-9 parts quartz, 3-7 parts calcined talc, 3-7 parts alumina, 1-3 parts zinc oxide, and 2-4 parts colorant. In this embodiment, the base glaze formulation for the glaze dots is similar to or even identical to the formulation for the base glaze layer, resulting in good chemical compatibility between the glaze dots and the base glaze layer. During the firing process of ceramic tiles, ions diffuse into each other at the interface between the glaze splatter point and the base glaze layer, forming a transition layer with gradually changing composition. This allows for strong chemical bonding between the glaze layers, preventing defects such as delamination and peeling. It ensures that the glaze surface is smooth and continuous, without local glaze defects or exposed base, and maintains a stable matte texture and color. It also enhances the overall bonding strength between the body and glaze, improves the physical and chemical properties of ceramic tiles such as thermal shock resistance and stain resistance, reduces the rate of defective products, and ensures the stability of mass production and long-term durability of matte crystalline glaze ceramic tiles.

[0035] In glazing, the ratio of zirconium silicate to base glaze affects the crystal morphology, surface smoothness, and bonding strength of the glaze layer. If the proportion of zirconium silicate is too high, firstly, it will lead to an excessively dense concentration of heterogeneous nucleation sites in the glazing points, resulting in insufficient space for crystal growth. Adjacent crystals will come into contact and adhere to each other in the early stages of growth, forming irregular sheet-like or clustered crystals instead of independent point-like crystals. Secondly, when the proportion of zirconium silicate is too high, a large number of unmelted zirconium silicate particles will be dispersed in the glazing points, which will damage the overall smoothness of the glaze layer and cause fluctuations in the glaze gloss. Furthermore, the difference in the coefficient of thermal expansion between zirconium silicate particles and glaze will generate micro-internal stress in the glaze layer during the cooling process of ceramic tiles, leading to a decrease in the bonding strength of the glaze layer.

[0036] If the proportion of zirconium silicate is too low, firstly, it will lead to a severe shortage of heterogeneous nucleation sites in the glaze layer at the glazing point. Zinc silicate in the surface glaze layer can only crystallize by homogeneous nucleation. Homogeneous nucleation requires higher supercooling and activation energy, and a larger cooling temperature difference to crystallize. Moreover, the nucleation position is random and uncontrollable, making it difficult for the glaze layer to form an obvious crystallization effect as a whole.

[0037] In order to balance the number of heterogeneous nucleation sites and avoid various glaze and crystallization defects caused by excessive or insufficient zirconium silicate, in a preferred embodiment, the base glaze and zirconium silicate are mixed in a weight ratio of (94-96):(4-6).

[0038] Among numerous ceramic colorants, cobalt blue has the chemical composition CoAl2O4, and its color-emitting ion is Co. 2+ ionic radius and Zn 2+ Approaching, and capable of replacing Zn in the zinc silicate lattice 2+ Sites are formed to create stable ionic solid solutions. Based on this, the present invention uses cobalt blue pigment as the colorant and adds it to the formulation system of the base glaze and the base glaze. Thus, as the glaze components gradually melt, Co... 2+ When uniformly dispersed in the glaze glass phase, it can replace the Zn²+ sites in the zinc silicate lattice to form a stable ionic solid solution, and the color is produced by the electronic transition of the chromophore ions.

[0039] Because the color-producing ions are fixed inside the crystalline phase lattice rather than adsorbed on the crystal surface, the color-producing effect is not affected by the surface state of the glaze, thus significantly improving the color consistency between batches of ceramic tiles.

[0040] In a preferred embodiment, the raw materials for preparing the glaze layer, by weight, include: 23-27 parts potassium feldspar, 8-12 parts barium carbonate, 8-12 parts quartz, 23-27 parts calcite, and 28-32 parts zinc oxide. In these raw materials, zinc oxide undergoes a high-temperature solid-state reaction with potassium feldspar, calcite, quartz, and other components to generate the zinc silicate main crystalline phase. Furthermore, sufficient zinc oxide in the glaze layer ensures adequate precipitation of the zinc silicate crystalline phase, resulting in diffuse reflection through fine microcrystals, thus forming a uniform matte glaze surface. Simultaneously, the appropriate amount of calcite in the glaze layer prevents excessively low high-temperature viscosity, thus preventing excessive overall fluidity of the glaze layer during high-temperature firing and avoiding the aggregation and growth of point-like crystals. This ensures that the glaze surface of the crystalline glaze ceramic tile does not exhibit a glossy effect caused by the aggregation and growth of crystalline phases, but rather achieves a matte glaze effect.

[0041] In addition, the raw materials used in this glaze layer are similar in chemical composition to those in the base glaze layer and the glaze application points, which can further enhance the interlayer bonding between the glaze layers and avoid defects such as delamination and peeling of the glaze layer.

[0042] like Figure 1 As shown, a second aspect of the present invention provides a method for preparing the matte crystalline glaze ceramic tile as described above, comprising the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

[0043] The preparation method described above can be implemented on a large scale using existing ceramic tile production lines. It has strong process stability, is easy to promote industrialization and mass production, and can efficiently produce crystalline glaze ceramic tiles with a matte glaze effect and good color consistency between batches.

[0044] To improve the bonding strength between the body and the glaze and reduce glaze cracking and flow defects in the overall glaze layer, in a preferred embodiment, the specific gravity of the base glaze slurry in step S04 is 1.48–1.52 g / cm³. 3 The amount of base glaze applied is 1.4–1.8 g / (48×48 mm).

[0045] To achieve continuous variation in the size and density of the dot-like crystals and meet different decorative effect requirements, in a preferred embodiment, the specific gravity of the glaze slurry in step S05 is 1.50–1.60 g / cm³. 3 The application rate of the glaze slurry is 0.6–1.0 g / (48×48mm specification), and it is applied by spraying through a ceramic nozzle. The nozzle, under low air pressure, creates uniform capillary glaze dots. The spraying air pressure is 0.13–0.22 MPa. If the spraying air pressure is too low, the capillary glaze dots will be too large and unevenly distributed; if the air pressure is too high, the capillary glaze dots will be too small and prone to glaze splattering, affecting the glaze surface quality.

[0046] To control the thickness of the glaze layer and avoid excessively high content of crystalline components, in a preferred embodiment, the glaze slurry is sprayed in step S07 using a spraying method. The specific gravity of the glaze slurry is 1.50–1.60 g / cm³. 3 The application rate of the glaze slurry is 1.2–1.6 g / (48×48mm). By controlling the thickness of the glaze layer, excessive crystallization components can be avoided, preventing the formation and rapid aggregation of numerous fine crystals within the glaze layer itself. The diffuse reflection of light by the crystals will not be too strong, and the gloss of the glaze surface will not be abnormally low.

[0047] In the preparation method of the matte crystalline glaze ceramic tile, the highest firing temperature in step S08 is 1190-1210℃, and the firing cycle is 38-42 minutes. When the firing temperature is controlled within the range of 1190-1210℃, firstly, the melting degree of each glaze layer is moderate, the amount of glass phase generated in the glaze system matches the crystallization requirements, and the zinc silicate crystallization reaction is stable and controllable; secondly, the cobalt blue coloring ions in the base glaze can diffuse upwards uniformly and fully embed into the zinc silicate lattice, resulting in pure and stable color; thirdly, the organic carrier in the inkjet ink is completely decomposed at high temperature, leaving no carbon residue, and the pattern color reproduction is high; finally, ion interdiffusion fully occurs at the interfaces between the base glaze, the glaze application points, and the top glaze, resulting in a tight and firm bond between the multiple glaze layers.

[0048] When the firing temperature is below 1190℃, the glaze melts insufficiently, the glass phase content of the glaze system is low, the crystallization driving force is insufficient, the glaze surface crystals are small and sparse, and the matte effect is poor. The organic carrier of the ink decomposes incompletely, and residual carbon encapsulates the pigment particles, which will cause the overall color to be dark. At the same time, the porosity inside the glaze layer increases, and the water absorption rate of the finished product cannot meet the standard. When the firing temperature is above 1210℃, the glaze overmelts, the high-temperature viscosity drops significantly, and glaze flow defects are very easy to occur. In addition, the crystal growth rate increases sharply, the grains grow rapidly and agglomerate with each other, which will destroy the uniform dot crystal morphology. Furthermore, when the firing temperature is above 1210℃, the inkjet pigment and the surface glaze components undergo a violent solid-phase reaction, the edges of the pattern are blurred and blurred, and the color difference of products in the same batch becomes significantly larger.

[0049] The present invention will be further illustrated by the following examples and comparative examples.

[0050] Example 1 This embodiment provides a matte crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0051] The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0052] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 95:5.

[0053] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0054] The raw materials for preparing the glaze layer, by weight, include: 25 parts potassium feldspar, 10 parts barium carbonate, 10 parts quartz, 25 parts calcite, and 30 parts zinc oxide.

[0055] This embodiment also provides a method for preparing matte crystalline glaze ceramic tiles, including the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

[0056] In step S04, the specific gravity of the base glaze slurry is 1.50 g / cm³. 3 The amount of base glaze slurry applied is 1.6g / (48×48mm size).

[0057] In step S05, the specific gravity of the glazing slurry is 1.58 g / cm³. 3 The glazing slurry was applied by spraying with an air pressure of 0.18 MPa and a total glazing amount of 0.8 g / (48×48 mm size).

[0058] In step S07, the specific gravity of the glaze slurry is 1.58 g / cm³. 3 The surface glaze is applied by spraying, with an application rate of 1.4g / (48×48mm).

[0059] In step S08, the maximum firing temperature is 1200℃ and the firing cycle is 40 minutes.

[0060] Example 2 This embodiment provides a matte crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0061] The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 16 parts, sodium feldspar 18 parts, calcined kaolin 13 parts, calcite 8 parts, black mud powder 8 parts, barium carbonate 6 parts, quartz 5 parts, calcined talc 3 parts, alumina 3 parts, zinc oxide 1 part, cobalt blue pigment 2 parts.

[0062] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 96:4.

[0063] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 16 parts, sodium feldspar 18 parts, calcined kaolin 13 parts, calcite 8 parts, black mud powder 8 parts, barium carbonate 6 parts, quartz 5 parts, calcined talc 3 parts, alumina 3 parts, zinc oxide 1 part, cobalt blue pigment 2 parts.

[0064] The raw materials for preparing the glaze layer, by weight, include: 23 parts potassium feldspar, 8 parts barium carbonate, 8 parts quartz, 23 parts calcite, and 28 parts zinc oxide.

[0065] This embodiment also provides a method for preparing matte crystalline glaze ceramic tiles, including the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

[0066] In step S04, the specific gravity of the base glaze slurry is 1.48 g / cm³. 3 The amount of base glaze slurry applied is 1.4g / (48×48mm size).

[0067] In step S05, the specific gravity of the glazing slurry is 1.56 g / cm³. 3 The glazing slurry was applied by spraying with an air pressure of 0.13 MPa and a total glazing amount of 0.6 g / (48×48 mm size).

[0068] In step S07, the specific gravity of the glaze slurry is 1.56 g / cm³. 3 The surface glaze is applied by spraying, with an application rate of 1.2g / (48×48mm).

[0069] In step S08, the highest firing temperature is 1190℃ and the firing cycle is 38 minutes.

[0070] Example 3 This embodiment provides a matte crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0071] The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 20 parts, sodium feldspar 22 parts, calcined kaolin 17 parts, calcite 12 parts, black mud powder 12 parts, barium carbonate 10 parts, quartz 9 parts, calcined talc 7 parts, alumina 7 parts, zinc oxide 3 parts, cobalt blue pigment 4 parts.

[0072] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 94:6.

[0073] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 20 parts, sodium feldspar 22 parts, calcined kaolin 17 parts, calcite 12 parts, black mud powder 12 parts, barium carbonate 10 parts, quartz 9 parts, calcined talc 7 parts, alumina 7 parts, zinc oxide 3 parts, cobalt blue pigment 4 parts.

[0074] The raw materials for preparing the glaze layer, by weight, include: 27 parts potassium feldspar, 12 parts barium carbonate, 12 parts quartz, 27 parts calcite, and 32 parts zinc oxide.

[0075] This embodiment also provides a method for preparing matte crystalline glaze ceramic tiles, including the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

[0076] In step S04, the specific gravity of the base glaze slurry is 1.52 g / cm³. 3 The amount of base glaze slurry applied is 1.8g / (48×48mm size).

[0077] In step S05, the specific gravity of the glazing slurry is 1.60 g / cm³. 3 The glazing slurry was applied by spraying with an air pressure of 0.22 MPa and a total glazing amount of 1.0 g / (48×48 mm size).

[0078] In step S07, the specific gravity of the glaze slurry is 1.60 g / cm³. 3 The surface glaze is applied by spraying, with an application rate of 1.6g / (48×48mm).

[0079] In step S08, the highest firing temperature is 1210℃ and the firing cycle is 42 minutes.

[0080] Comparative Example 1 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0081] The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 8 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0082] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 95:5.

[0083] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 8 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0084] The raw materials used to prepare the glaze layer are the same as those used to prepare the glaze layer provided in Example 1.

[0085] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0086] Comparative Example 2 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0087] The raw materials used to prepare the base glaze layer are the same as those used to prepare the base glaze layer provided in Example 1.

[0088] The raw materials for preparing the glaze spots are the same as those for preparing the glaze spots provided in Example 1.

[0089] The raw materials for preparing the glaze layer, by weight, include: 23 parts potassium feldspar, 8 parts barium carbonate, 8 parts quartz, 23 parts calcite, and 25 parts zinc oxide.

[0090] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0091] Comparative Example 3 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0092] The raw materials used to prepare the base glaze layer are the same as those used to prepare the base glaze layer provided in Example 1.

[0093] The raw materials for preparing the glaze spots are the same as those provided in Example 1.

[0094] The raw materials for preparing the glaze layer, by weight, include: 23 parts potassium feldspar, 8 parts barium carbonate, 8 parts quartz, 23 parts calcite, and 35 parts zinc oxide.

[0095] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0096] Comparative Example 4 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0097] The raw materials used to prepare the base glaze layer are the same as those used to prepare the base glaze layer provided in Example 1.

[0098] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 97:3.

[0099] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0100] The raw materials used to prepare the glaze layer are the same as those used to prepare the glaze layer provided in Example 1.

[0101] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0102] Comparative Example 5 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0103] The raw materials used to prepare the base glaze layer are the same as those used to prepare the base glaze layer provided in Example 1.

[0104] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 93:7.

[0105] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 5 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0106] The raw materials used to prepare the glaze layer are the same as those used to prepare the glaze layer provided in Example 1.

[0107] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0108] Comparative Example 6 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0109] The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 2 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0110] The raw materials for preparing the glaze include a base glaze and zirconium silicate. The weight ratio of the base glaze to zirconium silicate is 95:5.

[0111] The raw materials for preparing the base glaze, by weight, include: Potassium feldspar 18 parts, sodium feldspar 20 parts, calcined kaolin 15 parts, calcite 10 parts, black mud powder 10 parts, barium carbonate 8 parts, quartz 7 parts, calcined talc 5 parts, alumina 2 parts, zinc oxide 2 parts, cobalt blue pigment 3 parts.

[0112] The raw materials used to prepare the glaze layer are the same as those used to prepare the glaze layer provided in Example 1.

[0113] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0114] Comparative Example 7 This comparative example provides a crystalline glaze ceramic tile, including a tile body layer, a base glaze layer disposed above the tile body layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer disposed on the base glaze layer, and a surface glaze layer disposed on the ink printing layer.

[0115] The raw materials used to prepare the base glaze layer are the same as those used to prepare the base glaze layer provided in Example 1.

[0116] The raw materials for preparing the glaze spots are the same as those provided in Example 1.

[0117] The raw materials for preparing the glaze layer, by weight, include: 23 parts potassium feldspar, 8 parts barium carbonate, 8 parts quartz, 30 parts calcite, and 30 parts zinc oxide.

[0118] This comparative example also provides a method for preparing crystalline glaze ceramic tiles, which is the same as the method provided in Example 1.

[0119] The crystalline glaze ceramic tiles provided in the above embodiments and comparative examples were tested, and the test results are shown in the table below. The stain resistance test was conducted according to the standard GB / T 3810.14-2016 Ceramic Tiles Test Methods Part 14: Determination of Stain Resistance.

[0120]

[0121] As can be seen from the test results in the table above, the crystalline glaze ceramic tiles provided in Examples 1 to 3 have uniform crystal distribution without agglomeration, smooth glaze surface without pinholes, glaze cracks, glaze flow and other defects, stable gloss control in the 8-12° matte range, clear and complete inkjet ink patterns with high color fidelity, and the stain resistance of the products all reach the highest level 5 standard, which can meet the usage requirements.

[0122] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 1 with the crystalline glaze ceramic tile provided in Example 1, it was found that the glaze surface gloss of the crystalline glaze ceramic tile provided in Comparative Example 1 was higher. This is because the amount of calcined kaolin in the base glaze layer raw material used in Comparative Example 1 was insufficient, which caused the melting temperature of the base glaze layer to drop and the high-temperature fluidity of the base glaze layer to increase. It was unable to maintain the semi-solid phase rigid structure, which led to the easy aggregation and growth of dot crystals, and the glaze surface of the crystalline glaze ceramic tile was prone to producing a glossy effect.

[0123] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 2 with the crystalline glaze ceramic tile provided in Example 1, it was found that the crystalline glaze ceramic tile provided in Comparative Example 2 had a higher glaze gloss and a weaker crystallization effect (see...). Figure 5This is because the amount of zinc oxide in the glaze material of Comparative Example 2 was insufficient. Zinc oxide in the glaze is the only raw material for the formation of the zinc silicate crystalline phase, and its content directly determines the crystallization driving force and the volume fraction of the crystalline phase. When the amount of zinc oxide is too low, the concentration of zinc ions that can participate in the crystallization reaction in the glaze layer is insufficient, the crystallization driving force decreases significantly, and the final volume fraction of the crystalline phase is low, failing to form a sufficient diffuse reflection interface, resulting in a high gloss of the glaze surface. Simultaneously, the activation energy of nucleation sites increases, and only a few high-energy sites can nucleate, resulting in a sparse number of crystallization points with random distribution and poor uniformity.

[0124] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 3 with the crystalline glaze ceramic tile provided in Example 1, it was found that the gloss of the crystalline glaze ceramic tile provided in Comparative Example 3 was lower. This is because the amount of zinc oxide in the glaze layer raw material of Comparative Example 3 was higher, resulting in a significant increase in the zinc ion concentration in the glaze layer. This led to an excessively strong crystallization driving force, with the nucleation rate far exceeding the crystal growth rate. Consequently, a large number of fine crystals were generated simultaneously and rapidly aggregated, resulting in excessive diffuse reflection of light and an abnormally low gloss of the glaze surface. In addition, during the growth process, a large number of crystals squeezed and overlapped each other, with some crystals penetrating to the surface of the inkjet layer, physically blocking the inkjet pigments. At the same time, the high concentration of zinc oxide increased the chemical activity of the glaze layer, causing a weak solid-phase reaction with some inkjet pigments, resulting in localized darkening of the color (see...). Figure 6 ).

[0125] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 4 with the crystalline glaze ceramic tile provided in Example 1, it was found that the glaze gloss of the crystalline glaze ceramic tile provided in Comparative Example 4 was higher and there was no obvious crystallization effect. This was because the amount of zirconium silicate in the raw materials of the glaze-splashing point of Comparative Example 4 was lower.

[0126] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 5 with the crystalline glaze ceramic tile provided in Example 1, it was found that the glaze layer of the crystalline glaze ceramic tile provided in Comparative Example 5 was crystalline and adhered, and had poor uniformity. This was because the amount of zirconium silicate in the raw materials of the glaze casting point of Comparative Example 4 was too high.

[0127] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 6 with that provided in Example 1, it was found that the crystalline glaze ceramic tile provided in Comparative Example 6 had poor uniformity of glaze crystallization and exhibited localized glaze peeling and cracking. This is because the alumina content in the base glaze layer of Comparative Example 6 was relatively low. Alumina is a key component in the base glaze layer for regulating the coefficient of thermal expansion and chemical stability. When the amount of alumina is low, the coefficient of thermal expansion of the base glaze layer increases significantly, disrupting the matching with the coefficient of thermal expansion of the tile body. During cooling, the glaze layer generates significant tensile stress, leading to localized glaze cracking and even peeling. Moreover, when the alumina content is low, the chemical stability of the base glaze layer decreases. During the ceramic tile firing process, the base glaze melts excessively and penetrates into the body, resulting in uneven glaze layer thickness. This difference in glaze layer thickness affects the uniformity of the crystallization process, causing uneven distribution of crystallization points. In addition, excessive melting of the base glaze can cause cobalt ions to migrate into the brick body, resulting in localized lighter color; micro-cracks and uneven thickness on the glaze surface can affect the spread and color development of inkjet ink, ultimately leading to uneven overall color development.

[0128] Furthermore, comparing the crystalline glaze ceramic tile provided in Comparative Example 7 with the crystalline glaze ceramic tile provided in Example 1, it was found that the crystalline glaze uniformity of the ceramic tile provided in Comparative Example 7 was poor, and the gloss of the glaze surface was higher than 12°. This is because the calcite content in the glaze layer raw material used in Comparative Example 7 was relatively high. Calcite decomposes during firing to produce CaO, which is the main flux in the glaze, and its content directly determines the melting temperature and high-temperature viscosity of the glaze. When the calcite content in the glaze increases, the melting temperature of the glaze decreases significantly, the high-temperature viscosity is too low, and the glaze layer becomes too fluid during firing. Excessive fluidity of the glaze layer can cause the nucleation sites to shift, disrupting the distribution of crystal points and reducing uniformity. Simultaneously, the thickness of the glaze layer becomes thinner, the volume fraction of the crystalline phase decreases relatively, and the gloss deviates from the matte range. In addition, excessive fluidity of the glaze at high temperatures can also cause inkjet pigments to diffuse into the glaze layer and be diluted, while simultaneously reacting with Ca²⁺ in the glaze. + A harmful solid-phase reaction occurs, producing colorless calcium salts, which results in dull inkjet color.

[0129] 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 matte crystalline glaze ceramic tile, characterized in that, It includes a brick blank layer, a base glaze layer set above the brick blank layer, glaze dots randomly distributed on the base glaze layer, an ink printing layer set on the base glaze layer, and a top glaze layer set on the ink printing layer; The raw materials for preparing the glaze points include zirconium silicate; the raw materials for preparing the surface glaze layer include zinc oxide. The raw materials for preparing the base glaze layer, by weight, include: Potassium feldspar 16-20 parts, sodium feldspar 18-22 parts, calcined kaolin 13-17 parts, calcite 8-12 parts, black mud powder 8-12 parts, barium carbonate 6-10 parts, quartz 5-9 parts, calcined talc 3-7 parts, alumina 3-7 parts, zinc oxide 1-3 parts, colorant 2-4 parts.

2. The matte crystalline glaze ceramic tile according to claim 1, characterized in that, The raw materials for preparing the glaze application point also include a base glaze; by weight, the raw materials for preparing the base glaze include: Potassium feldspar 16-20 parts, sodium feldspar 18-22 parts, calcined kaolin 13-17 parts, calcite 8-12 parts, black mud powder 8-12 parts, barium carbonate 6-10 parts, quartz 5-9 parts, calcined talc 3-7 parts, alumina 3-7 parts, zinc oxide 1-3 parts, colorant 2-4 parts.

3. The matte crystalline glaze ceramic tile according to claim 2, characterized in that, The base glaze and zirconium silicate are mixed in a weight ratio of (94-96):(4-6).

4. The matte crystalline glaze ceramic tile according to claim 1, characterized in that, The raw materials for preparing the glaze layer, by weight, include: 23-27 parts potassium feldspar, 8-12 parts barium carbonate, 8-12 parts quartz, 23-27 parts calcite, and 28-32 parts zinc oxide.

5. The matte crystalline glaze ceramic tile according to claim 1, characterized in that, The colorant is cobalt blue.

6. A method for preparing matte crystalline glaze ceramic tiles as described in claims 1-5, characterized in that, Includes the following steps: S01. The raw materials for preparing the base glaze layer are put into a ball mill according to the specified ratio, mixed with water and ball milled to obtain the base glaze slurry. S02. The raw materials for preparing the glaze points are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S03. The raw materials for the preparation of the glaze are put into a ball mill according to the proportion, mixed with water and ball milled to obtain the glaze slurry. S04. Apply the base glaze slurry to the surface of the brick body to form a base glaze layer; S05. Apply glaze slurry to the base glaze layer to randomly form glaze spots on the base glaze layer; S06. Print ceramic ink on the base glaze layer to form an ink printing layer; S07. Apply a top glaze paste to the ink printing layer to form a top glaze layer; S08. Firing to obtain the matte crystalline glaze ceramic tile.

7. The method for preparing matte crystalline glaze ceramic tiles according to claim 6, characterized in that, In step S04, the specific gravity of the base glaze slurry is 1.48–1.52 g / cm³. 3 .

8. The method for preparing matte crystalline glaze ceramic tiles according to claim 6, characterized in that, In step S05, the specific gravity of the glazing slurry is 1.50–1.60 g / cm³. 3 The glaze slurry is sprayed using a spray glazing method, with a spray air pressure of 0.13 to 0.22 MPa.

9. The method for preparing matte crystalline glaze ceramic tiles according to claim 6, characterized in that, In step S07, the specific gravity of the glaze slurry is 1.50–1.60 g / cm³. 3 The surface glaze is applied by spraying glaze.

10. The method for preparing matte crystalline glaze ceramic tiles according to claim 6, characterized in that, In step S08, the highest firing temperature is 1190-1210℃, and the firing cycle is 38-42 minutes.

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