Preparation method of zirconium-aluminum composite inclusion, application of zirconium-aluminum composite inclusion in glaze, semitransparent jade effect glaze and preparation method of white marble imitating ceramic tile

Abstract

The invention discloses a preparation method of a zirconium-aluminum composite inclusion, application of the zirconium-aluminum composite inclusion in glaze, semitransparent jade effect glaze and a preparation method of a white marble imitating ceramic tile, and relates to the field of materials and the field of architectural ceramics. The special core-shell structure inhibits abnormal growth of zirconium silicate crystal grains of a core layer in the firing process, and fills the crystal boundary to form a uniform and fine microcrystalline-nano composite structure, so that a decorative effect which is different from that of a physical mixture is formed in a glaze layer, and a semitransparent warm and moist jade texture similar to white marble is obtained in the glaze layer. The invention also provides a preparation method of the semitransparent jade effect glaze and the white marble imitating ceramic tile, the high-whiteness basic glaze and the semitransparent jade effect glaze are sequentially covered on the green body, the white marble ceramic tile with abundant three-dimensional layering sense and semitransparent jade texture is realized by matching with the process, and the decoration effect is excellent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of materials and the field of architectural ceramics, in particular to a preparation method of zirconium-aluminum composite inclusion and its application in glaze, a translucent jade effect glaze, and a preparation method of imitation white marble ceramic tiles. BACKGROUND

[0002] Imitation natural high-grade stone is an important development direction in the field of architectural ceramics. There are various imitation jade ceramic tile schemes in the prior art. For example, Prior Art 1 (Publication No. CN110963793B, Imitation jade ceramic tile and its preparation method) uses a single special formula light-transmitting material layer, uses artificial synthetic anorthite as the main crystal phase, aims to obtain high whiteness, permeability, and saves face glaze to reduce cost.

[0003] However, this kind of scheme focusing on a single material formula is difficult to achieve the warm, three-dimensional, and deep jade texture of natural white marble while pursuing high whiteness and high permeability. The fundamental reason is that a single glaze layer structure is difficult to simulate the light scattering and refraction levels inside natural jade in terms of optics. Therefore, how to give the glaze surface more rich three-dimensional level and translucent jade texture on the basis of ensuring high whiteness has become a technical problem to be solved. SUMMARY

[0004] The main purpose of the present application is to propose a preparation method of zirconium-aluminum composite inclusion and its application in glaze. The zirconium-aluminum composite inclusion is applied to the glaze. During firing, nano-alumina effectively inhibits the abnormal growth of zirconium silicate grains and fills the grain boundaries, forming a uniform and delicate "microcrystalline-nano composite structure", which plays an important role in realizing high permeability and translucent jade texture of the glaze layer.

[0005] Another main purpose of the present application is to propose a translucent jade effect glaze. The formula of the glaze has a pure and uniform permeability and a warm texture after firing.

[0006] The third main purpose of the present application is to propose a preparation method of imitation white marble ceramic tiles. Through the cooperation of process and formula, the ceramic tiles obtained by firing have better quality, not only realizing rich three-dimensional level and translucent jade texture, but also having better strength and wear resistance.

[0007] The last purpose of the present application is to propose a ceramic tile prepared by the aforementioned preparation method of imitation white marble ceramic tiles.

[0008] In order to achieve the above-mentioned purpose, the present application provides a preparation method of zirconium-aluminum composite inclusion, wherein nano-alumina dispersion liquid is mixed with zirconium silicate micro powder under high-speed shearing and ultrasonic oscillation, and a silane coupling agent is added for surface modification, so that the nano-alumina is firmly wrapped on the surface of the zirconium silicate particles through chemical action, and after drying, a zirconium-aluminum composite inclusion with nano-alumina as a shell layer and zirconium silicate as a core layer is obtained, and the mass ratio of the nano-alumina to the zirconium silicate micro powder is 1:9-1:12 according to the dry material quality.

[0009] Preferably, the amount of the silane coupling agent is 1-2% of the weight of the nano-alumina, and the D50 of the zirconium silicate micro powder is ≤2 μm.

[0010] The present application uses the prepared zirconium-aluminum composite inclusion as a glaze raw material, which is different from the physical mixing of the glaze in the prior art. The zirconium-aluminum composite inclusion prepared in the present application has a core-shell structure, and when applied in the glaze firing process, the nano-alumina in the shell layer effectively inhibits the abnormal growth of the zirconium silicate crystal grains in the core layer and fills the crystal boundary to form a uniform and delicate "microcrystal-nano composite structure". However, in the glaze, the alumina and the zirconium silicate are directly physically mixed, and in the firing process, the zirconium silicate crystal grains are prone to abnormal growth and agglomeration due to the lack of effective wrapping and spatial blocking of the nano-alumina, and the alumina is unevenly distributed and difficult to effectively fill the crystal boundary, resulting in a relatively rough glaze layer structure, poor light transmission uniformity, and finally a strong milky feeling and insufficient warmth and transparency. After the weight ratio of the nano-alumina to the silane coupling agent and the D50 of the zirconium silicate micro powder are optimized, the modification reaction can be better performed, the nano-alumina is better wrapped on the surface of the zirconium silicate particles, and a more complete and stable core-shell structure is formed, which is conducive to more effective regulation of the glaze layer microstructure in the subsequent firing process.

[0011] The present application also provides a semi-transparent jade effect glaze, which is composed of the following raw materials according to weight percentage: feldspar 40-60%, quartz 10-20%, calcite 5-15%, zinc oxide 3-8%, the prepared zirconium-aluminum composite inclusion 8-15%, kaolin 5-10%, and bentonite 0.5-2%. Specifically, an appropriate amount of known auxiliary materials can be added during preparation to improve the physical properties of the glaze, such as adding 0.1-0.5% of sodium carboxymethyl cellulose. In the present application, the feldspar includes but is not limited to one or a combination of potassium feldspar and sodium feldspar.

[0012] After introducing an appropriate amount of zirconium-aluminum composite inclusion into the semi-transparent jade effect glaze formula, the nano-alumina can effectively inhibit the abnormal growth of the zirconium silicate crystal grains and fill the crystal boundary during the firing process, forming a uniform and delicate "microcrystal-nano composite structure", so that the transparency in the glaze layer is more pure and uniform, and the texture is warm.

[0013] The application further provides a preparation method of the imitation white marble ceramic tile, which at least comprises the following steps. Step a: preparing a body, applying a base glaze with whiteness of 85-92 degrees on the body, and drying; Step b: applying the aforementioned translucent jade effect glaze on the dried tile body; Step c: kiln firing, the firing period is 68-72 min, the firing curve is controlled in the temperature rising interval of 1080-1160 ℃, the temperature control crystallization treatment is performed for 8-12 min, the temperature rising speed is controlled to be less than or equal to 10 ℃ / min, and the peak temperature of the firing curve is 1220-1230 ℃; Step d: obtaining the finished imitation white marble ceramic tile through edge grinding and inspection after firing.

[0014] Preferably, the firing system is as follows: Temperature rising stage: Room temperature-400 ℃, rate 37-39 ℃ / min, rapid dehydration.

[0015] 400-1000 ℃, rate 58-62 ℃ / min, rapid temperature rising and oxidation decomposition.

[0016] 1000-1080 ℃, rate 20-25 ℃ / min, transition temperature rising.

[0017] 1080-1160 ℃, rate 7-9 ℃ / min, slow temperature rising and crystallization.

[0018] 1160-1225 ℃, rate 10-12 ℃ / min, final sintering.

[0019] 1225-1225 ℃, holding for 2-3 min.

[0020] Temperature falling stage: 1225-600 ℃, rate 100-110 ℃ / min, rapid cooling, inhibiting the growth of adverse crystal phase, preventing the loss of transparency of the glaze surface, and keeping high transparency.

[0021] 600-560 ℃, rate 7-9 ℃ / min, stress slow cooling, reducing the temperature falling rate, safely passing the quartz crystal type transition point, uniformly releasing the internal stress of the product, and preventing wind cracks.

[0022] 560 ℃-room temperature, rate 25-27 ℃ / min, continuously cooling to the kiln temperature.

[0023] Preferably, the base glaze comprises the following raw material components in percentage by weight: Potassium feldspar 25-35%, quartz 15-25%, calcite 8-15%, zinc oxide 3-6%, zirconium silicate 15-25%, kaolin 5-10%, and talc 2-5%.

[0024] In the preparation of the imitation Chinese white marble ceramic tile, the high whiteness base glaze and the translucent jade effect glaze are applied in sequence to realize the layered "covering whitening" and "creating the sense of transparency and levelness", and to provide a structural basis for creating visual depth. In the process, the temperature rising rate is controlled to be below 10℃ / min in a specific temperature range, and the temperature is controlled for 8-12 minutes for the controlled temperature crystallization treatment, so as to regulate the interface reaction of the two layers of glaze, induce the functional materials in the surface glaze to form an ideal microstructure, realize the target texture, and realize the translucent jade texture and three-dimensional level of the glaze layer in cooperation with the high whiteness base glaze. By further optimizing the firing curve, the quality of the ceramic tile obtained after firing is better, and the strength and wear resistance are better.

[0025] The application also provides a ceramic tile prepared by the preparation method of the imitation Chinese white marble ceramic tile.

[0026] Preferably, the thickness of the base glaze layer is 0.3-0.6mm, and the thickness of the translucent jade effect glaze layer is 0.5-0.8mm. The thickness range is conducive to the base glaze layer fully covering the base body color and providing a high whiteness background, and the translucent jade effect glaze layer can form sufficient optical thickness, and cooperate with the base glaze layer to produce visual depth and three-dimensional level similar to natural Chinese white marble.

[0027] Unlike traditional physical mixing, the application prepares zirconium-aluminum composite inclusions by mixing nano-aluminum oxide and zirconium silicate, and introduces the inclusions into the glaze. The special core-shell structure of the inclusions inhibits the abnormal growth of the zirconium silicate grains in the core layer and fills the grain boundaries during the firing process, forming a uniform and delicate "microcrystal-nano composite structure", which forms a decorative effect different from physical mixing in the glaze layer, and helps to achieve the target texture in the glaze layer. Based on this, the application also provides a translucent jade effect glaze and a preparation method of an imitation Chinese white marble ceramic tile. The high whiteness base glaze and the translucent jade effect glaze are sequentially covered on the base body, and a Chinese white marble ceramic tile with rich three-dimensional level and translucent jade texture is realized by cooperating with a specific firing process. The decorative effect is excellent. By further optimizing the firing curve, the quality of the ceramic tile obtained after firing is better. Not only the high whiteness and high transparency of the glaze layer are realized, but also the strength and wear resistance are better. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0029] Figure 1 A schematic diagram of the composite glaze layer structure of the marble-imitating ceramic tile according to the present application; Figure 2 A firing schedule curve diagram according to the present application; Figure 3 A schematic diagram of the core-shell structure of the zirconium-aluminum composite inclusion according to the present application; Figure 4 A comparison diagram of the microstructure of the marble-imitating ceramic tile according to the present application and the traditional physically mixed ceramic tile glaze.

[0030] In the accompanying drawings: 1 - body layer, 2 - base glaze layer, 3 - translucent jade effect glaze layer, 4 - nano-alumina shell layer, 5 - zirconium silicate core layer.

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can realize it. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0033] The present application proposes a preparation method of zirconium-aluminum composite inclusion. Nano-alumina dispersion liquid is mixed with zirconium silicate micro powder under high-speed shearing and ultrasonic oscillation, and a silane coupling agent is added for surface modification. The nano-alumina is firmly wrapped on the surface of zirconium silicate particles through chemical action, and the zirconium-aluminum composite inclusion with nano-alumina as the shell layer and zirconium silicate as the core layer is obtained after drying. The core-shell structure is shown in the accompanying drawings. Figure 3 The mass ratio of nano-alumina to zirconium silicate micro powder is 1:9~1:12 according to the dry material quality. Within this preferred range, the nano-alumina can form a complete and appropriately thick shell layer, effectively wrapping the zirconium silicate core layer, thereby optimally inhibiting the abnormal growth and filling of the grain boundaries of zirconium silicate during the firing process. If the mass ratio is less than 1:12 (i.e. relatively too little alumina), the wrapping is not complete, and the effect tends to be similar to physical mixing. If the mass ratio is greater than 1:9 (i.e. relatively too much alumina), the glaze surface melting and crystallization may be excessively inhibited, affecting the final texture.

[0034] The texture difference of the glaze surface caused by the "microcrystal-nano composite structure" described in the present application can be clearly distinguished by microscopic photography. See Figure 4Comparison: Figure 4 The enamel microstructure of the left (the present application) shows extremely high uniformity and compactness. Its base is uniform and delicate, and almost no obvious bright spots, pores and other impurities can be observed. The original zirconium silicate phase is effectively wrapped and isolated by nano-alumina, forming a continuous and dense composite structure of glass phase and microcrystalline phase. This "few defects, high density" microstructure is the core reason why it presents a macroscopic "warm, pure, translucent" quality similar to natural jade.

[0035] Figure 4 The enamel microstructure of the right (comparative example 1, physical mixing) shows obvious particles, spots and discrete white agglomerates. The structure is relatively rough, and there are many defects caused by abnormal grain growth and agglomeration. It presents the effect of ordinary opalescent enamel on the macroscopic level.

[0036] The difference in the above microstructure ultimately manifests the fundamental difference between the translucent, warm jade quality and the ordinary opalescent, dull quality on the macroscopic level.

[0037] The amount of silane coupling agent is 1-2% of the weight of nano-alumina, and the D50 of zirconium silicate micro-powder is ≤2μm.

[0038] The present application also proposes a translucent jade effect enamel, which comprises the following raw materials in percentage by weight: Feldspar 40-60%, quartz 10-20%, calcite 5-15%, zinc oxide 3-8%, the prepared zirconium-aluminum composite inclusion 8-15%, kaolin 5-10% and bentonite 0.5-2%. Specifically, 0.1-0.5% of carboxymethyl cellulose sodium can be added to the formula.

[0039] The present application also proposes a preparation method of imitation white marble ceramic tiles, which at least comprises the following steps: Step a: preparing a body, applying a base glaze with whiteness of 85-92° on the body, and drying; Step b: applying the translucent jade effect enamel of claim 4 on the dried tile body; Step c: entering the kiln for firing, the firing period is 68-72min, the firing curve is controlled in the temperature rising interval of 1080-1160℃, the temperature control crystallization treatment is carried out for 8-12min, the temperature rising speed is controlled to be ≤10℃ / min, and the peak temperature of the firing curve is 1220-1230℃; Step d: after firing, edge grinding and inspection, the finished imitation white marble ceramic tile is obtained.

[0040] The firing schedule is as follows: Rising stage: Room temperature-400℃, rate 37-39℃ / min, rapid dehydration.

[0041] 400-1000℃, rate 58-62℃ / min, fast heating and oxidative decomposition.

[0042] 1000-1080℃, rate 20-25℃ / min, transition heating.

[0043] 1080-1160℃, rate 7-9℃ / min, slow heating and crystallization.

[0044] 1160-1225℃, rate 10-12℃ / min, final sintering.

[0045] 1225-1225℃, holding for 2-3 minutes.

[0046] Cooling stage: 1225-600℃, rate 100-110℃ / min, rapid cooling, inhibiting growth of adverse crystal phase, preventing loss of transparency of glaze surface, and maintaining high transparency.

[0047] 600-560℃, rate 7-9℃ / min, stress slow cooling, reducing the cooling rate to safely pass through the quartz crystal transformation point, uniformly releasing internal stress of the product, and preventing wind cracks.

[0048] 560℃-room temperature, rate 25-27℃ / min, continuing cooling to kiln-out temperature.

[0049] In one specific embodiment, the firing curve is shown in the attached Figure 2 .

[0050] The base glaze, according to the percentage by weight, comprises the following raw material composition: Potassium feldspar 25-35%, quartz 15-25%, calcite 8-15%, zinc oxide 3-6%, zirconium silicate 15-25%, kaolin 5-10%, and talc 2-5%.

[0051] The present application also proposes a ceramic tile, which is prepared by using the preparation method of any one of the foregoing imitation white marble ceramic tiles, and sequentially comprises a body layer, a base glaze layer with a whiteness of 85-92°, and a semi-transparent jade effect glaze layer. As shown in the attached Figure 1 .

[0052] The thickness of the base glaze layer is 0.3-0.6mm, and the thickness of the semi-transparent jade effect glaze layer is 0.5-0.8mm.

[0053] The technical solutions of the present application are further described in detail below in combination with specific examples or comparative examples. In the following examples and comparative examples, the raw materials, reagents, etc. not specifically stated are obtained commercially, and the same batch of raw materials or reagents is used in the examples and comparative examples; the preparation methods not specifically stated are prepared by using conventional and well-known preparation methods.

[0054] Example 1 The ceramic tile is prepared according to the following preparation steps: 1. Preparation of zirconium-aluminum composite coating: 10 parts of zirconium silicate micro powder and 1 part of nano-aluminum oxide (i.e. mass ratio of 1:10) are taken by weight, and the nano-aluminum oxide dispersion liquid is mixed with the zirconium silicate micro powder under high-speed shearing and ultrasonic oscillation, and the nano-aluminum oxide is modified by KH-550 coupling agent and coated on the surface (the amount of silane coupling agent is 1.5% of the weight of nano-aluminum oxide, and the D50 of zirconium silicate micro powder is ≤ 2 μm), to prepare a zirconium-aluminum composite coating.

[0055] 2. Preparation of a body, applying a 0.5 mm thick base glaze on the body, drying, and then applying a 0.7 mm thick translucent jade effect glaze.

[0056] The translucent jade effect glaze has the following raw material formulation according to mass percentage: sodium feldspar 24%, potassium feldspar 27%, quartz 15%, calcite 8.7%, zinc oxide 5%, the above-mentioned coating 11%, kaolin 8%, bentonite 1% and CMC 0.3%.

[0057] The base glaze has the following raw material formulation according to mass percentage: potassium feldspar 30%, quartz 20%, calcite 10%, zinc oxide 5%, zirconium silicate 20%, kaolin 10% and talc 5%.

[0058] 3. Firing: the firing cycle is 70 min, and the firing curve is as follows: Rising temperature stage: Room temperature-400℃, rate 38℃ / min.

[0059] 400-1000℃, rate 60℃ / min.

[0060] 1000-1080℃, rate 23℃ / min.

[0061] 1080-1160℃, rate 8℃ / min.

[0062] 1160-1225℃, rate about 11℃ / min, sintering.

[0063] 1225-1225℃, 2 min holding.

[0064] Cooling stage: 1225-600℃, rate 104℃ / min.

[0065] 600-560℃, rate 8℃ / min.

[0066] 560℃-room temperature, rate 26℃ / min, continue cooling to kiln-out temperature.

[0067] 4. The prepared ceramic tile is edge-ground and inspected to obtain a finished product.

[0068] Example 2 Referring to the preparation steps in Example 1, the difference is that: The translucent jade-effect glaze glaze formula is as follows in terms of mass percentage: sodium feldspar 21%, potassium feldspar 21%, quartz 10.5%, calcite 17%, zinc oxide 3%, the above-mentioned inclusions 15%, kaolin 10%, bentonite 2%, CMC 0.5%.

[0069] The base glaze forms a glaze layer with a thickness of 0.3mm, and the translucent jade-effect glaze forms a glaze layer with a thickness of 0.8mm.

[0070] Example 3 Referring to the preparation steps in Example 1, the difference is that: The translucent jade-effect glaze glaze formula is as follows in terms of mass percentage: sodium feldspar 23%, potassium feldspar 32%, quartz 18.4%, calcite 5%, zinc oxide 8%, the above-mentioned inclusions 8%, kaolin 5%, bentonite 0.5%, CMC 0.1%.

[0071] The base glaze forms a glaze layer with a thickness of 0.6mm, and the translucent jade-effect glaze forms a glaze layer with a thickness of 0.5mm.

[0072] Comparative Example 1 Comparative Example 1 differs from Example 1 in that 11% of the zirconium-aluminum composite inclusions in Step 2 of Example 1 is replaced by a physical mixture of 10% of ordinary zirconium silicate powder and 1% of nano-aluminum oxide, and the remaining formula, preparation and firing process parameters are the same as those of Example 1.

[0073] Comparative Example 2 Comparative Example 2 differs from Example 1 in the heating rate of the 1080-1160℃ section of the firing curve.

[0074] Comparative Example 3 Comparative Example 3 differs from Example 1 in the base glaze.

[0075] Comparative Example 3-1: The weight ratio of zirconium silicate component in the base glaze formula is reduced from 20% to 10%, and the weight ratio of other raw materials is increased accordingly. The raw material composition of the base glaze formula is: potassium feldspar 35%, quartz 25%, calcite 15%, zinc oxide 5%, zirconium silicate 10%, kaolin 7%, and talc 3% by mass percentage. The whiteness of the base glaze is reduced to 78°.

[0076] Comparative Example 3-2: The base glaze is replaced with a conventional transparent base glaze.

[0077] The skilled person records the glaze effect of the ceramic tiles prepared in the above examples and comparative examples under sufficient light, measures their whiteness, wear resistance, and Mohs hardness, and obtains the effect data as shown in the table.

[0078] As can be seen from the above table, the ceramic tiles prepared in Examples 1-3 have excellent quality, whiteness, and transparency. They not only have a semi-transparent jade-like texture and rich three-dimensional level, but also have high strength and wear resistance, balancing the decorative effect and mechanical properties, and achieving the warm, three-dimensional, and deep jade-like texture of natural Hanbaiyu.

[0079] In Comparative Example 1, the traditional physical mixing method is used, and the whiteness of the ceramic tile glaze layer is lower than that of Example 1. The transparency of the glaze effect is significantly reduced, and the texture is similar to that of ordinary opal glaze. It is different from the excellent jade-like texture in Example 1, and significantly affects the scattering and refraction of light, affecting the three-dimensional level effect of the glaze layer. See Figure 4 , the microstructure comparison photos of the glaze surfaces of the two. It can be observed that: Figure 4 The microstructure of the glaze surface on the left (the present invention) shows high uniformity and compactness. The substrate is uniform and delicate, and almost no obvious bright spots, pores, and other impurities can be observed; Figure 4 The microstructure of the glaze surface on the right (Comparative Example 1, physical mixing) shows obvious particles, spots, and discrete white agglomerates. The structure is relatively rough, and there are many defects caused by abnormal grain growth and agglomeration.

[0080] In Comparative Example 2, the heating rate of the key crystallization stage in the firing curve is adjusted. It can be seen that both too high and too low rates affect the formation of the key texture.

[0081] As can be seen from Comparative Examples 3-1 to 3-2, when the whiteness of the base glaze is reduced or a conventional transparent base glaze is used, the formed glaze layer is far from the three-dimensional and deep jade-like texture of natural Hanbaiyu.

[0082] The above merely describes the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural variations or direct / indirect applications in other related technical fields based on the content of the present application description are included in the patent protection scope of the present application.

Claims

1. A method for preparing zirconium-aluminum complex inclusions, characterized by, The nano-alumina dispersion liquid is mixed with zirconium silicate micro powder under high-speed shearing and ultrasonic oscillation, and a silane coupling agent is added for surface modification, and after drying, a zirconium-aluminum composite inclusion with nano-alumina as the shell layer and zirconium silicate as the core layer is obtained, and the mass ratio of the nano-alumina to the zirconium silicate micro powder is 1:9-1:12 according to the dry material mass.

2. The method for producing zirconium-aluminum composite inclusion according to claim 1, characterized by, The amount of the silane coupling agent is 1-2% of the weight of the nano-alumina, and the D50 of the zirconium silicate micro powder is ≤2 μm.

3. Use of zirconia-alumina complex inclusions as obtained in claim 1 or 2, characterized in that, The zirconium-aluminum composite inclusion is used as a raw material of a glaze.

4. A translucent onyx effect glaze, characterized in that According to the weight percentage, the following raw material composition is included: feldspar 40-60%, quartz 10-20%, calcite 5-15%, zinc oxide 3-8%, the zirconium-aluminum composite inclusion according to claims 1-2 8-15%, kaolin 5-10%, and bentonite 0.5-2%.

5. A method for preparing a porcelain tile imitating alabaster, characterized by, At least the following steps are included: Step a: preparing a body, applying a base glaze with whiteness of 85-92° on the body, and drying; Step b: applying the translucent jade effect glaze according to claim 4 on the dried body; Step c: kiln firing, the firing period is 68-72 min, the firing curve is controlled in the temperature rising interval of 1080-1160℃, the temperature control crystallization treatment is performed for 8-12 min, the temperature rising speed is controlled to be ≤10℃ / min, and the peak temperature of the firing curve is 1220-1230℃; Step d: after firing, edge grinding and inspection, the finished product imitation white marble ceramic tile is obtained.

6. The method for preparing imitation white marble ceramic tiles as described in claim 5, characterized in that, The firing system is specifically as follows: Temperature rising stage: room temperature-400℃, speed 37-39℃ / min; 400-1000℃, speed 58-62℃ / min; 1000-1080℃, speed 20-25℃ / min; 1080-1160℃, speed 7-9℃ / min; 1160-1225℃, speed 10-12℃ / min, sintering; 1225℃, holding for 2-3 min; Temperature falling stage: 1225-600℃, speed 100-110℃ / min; 600-560℃, speed 7-9℃ / min; 560℃-room temperature, speed 25-27℃ / min, continue to cool to the kiln temperature.

7. The method for preparing imitation white marble ceramic tiles as described in claim 5, characterized in that, The base glaze includes the following ingredient composition according to the weight percentage: potash feldspar 25-35%, quartz 15-25%, calcite 8-15%, zinc oxide 3-6%, zirconium silicate 15-25%, kaolin 5-10%, and talc 2-5%.

8. Ceramic tile, characterized by the fact that, The imitation white marble ceramic tile is prepared by the preparation method according to any one of claims 5-7, and sequentially includes a body layer, a base glaze layer with whiteness of 85-92°, and a translucent jade effect glaze layer from bottom to top.

9. The ceramic tile according to claim 8, characterized in that, The thickness of the base glaze layer is 0.3-0.6 mm, and the thickness of the translucent jade effect glaze layer is 0.5-0.8 mm.

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