Ceramic tile with same-color blank surface and preparation method thereof

Abstract

The invention relates to the technical field of building materials, and mainly relates to a ceramic tile with a same-color blank surface and a preparation method thereof. The ceramic tile with the same-color blank surface comprises a blank body and a glaze layer, the glaze layer covers the surface of the blank body, and the glaze layer is prepared from transparent glaze; the blank body comprises the following components in parts by weight: 30-40 parts of potassium feldspar, 10-20 parts of dolomite, 1-5 parts of zinc oxide, 5-10 parts of strontium carbonate, 3-8 parts of corundum, 3-8 parts of washed soil, 5-10 parts of wollastonite, 1-5 parts of barium carbonate and 10-15 parts of frit; the transparent glaze comprises the following components in parts by weight: 5-10 parts of washed ball clay, 10-15 parts of medium white clay, 3-8 parts of talcum powder, 15-25 parts of potassium sand, 3-8 parts of white clay, 25-35 parts of potassium-sodium sand, 5-10 parts of albite powder, 5-10 parts of kaolin and 390-420 parts of water glass. The ceramic tile provided by the invention has a good blank surface same-color effect, and also has high adhesive force and strong wear resistance.

Description

Technical Field

[0001] This application relates to the field of building materials technology, and mainly to a ceramic tile with the same color on the body and the preparation method thereof. Background Technology

[0002] As a widely used basic material in the field of building decoration, ceramic tiles occupy an important position in indoor and outdoor floor and wall decoration due to their rich colors, diverse styles, and good physical properties. From traditional ceramic tiles to modern fully polished glazed tiles and microcrystalline stone tiles, ceramic tile technology has been continuously innovating to meet people's decorative needs for both aesthetics and practicality. However, most ceramic tiles on the market today have a common problem: the color of the body is inconsistent with the color of the surface glaze.

[0003] Tiles with the same color on the surface and body offer several significant advantages. Firstly, visually, a unified color ensures a harmonious appearance from the surface to the interior. Even if wear, cutting, or other factors expose the tile body during use, color differences will not appear, maintaining overall aesthetic appeal and significantly extending the tile's lifespan. Secondly, for renovation projects seeking unique design styles, tiles with the same color on the surface and body better realize the designer's creative concepts, creating a seamless and unified decorative effect that enhances the overall texture and artistic atmosphere of the space.

[0004] However, achieving the same color on the ceramic tile body and surface faces some technical challenges: the body material and the surface glaze differ in composition and firing characteristics, making it difficult for them to achieve the same color during high-temperature firing.

[0005] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this application is to provide a ceramic tile with the same color on the body and a method for preparing the same.

[0007] The technical solution of this application is as follows:

[0008] A ceramic tile with the same color as the body, comprising a body and a glaze layer, wherein the glaze layer covers the surface of the body and is made of a transparent glaze;

[0009] The embryo, by weight, comprises the following raw materials: 30-40 parts potassium feldspar, 10-20 parts dolomite, 1-5 parts zinc oxide, 5-10 parts strontium carbonate, 3-8 parts corundum, 3-8 parts washed clay, 5-10 parts wollastonite, 1-5 parts barium carbonate, and 10-15 parts frit.

[0010] The transparent glaze, by weight, comprises the following raw materials: 5-10 parts washed clay, 10-15 parts medium white clay, 3-8 parts talc powder, 15-25 parts potassium sand, 3-8 parts white clay, 25-35 parts potassium sodium sand, 5-10 parts sodium feldspar powder, 5-10 parts kaolin, and 390-420 parts water glass.

[0011] The glaze of this color-matched ceramic tile uses a transparent glaze, with a specific raw material formula for the body working synergistically with the transparent glaze raw materials. During firing, raw materials such as potassium feldspar and dolomite in the body react with each other to form a specific crystal structure and chemical composition, providing the basic physical properties and color foundation for the body. In the transparent glaze raw materials, washed clay and medium-white clay are ball-milled and then uniformly mixed with water glass to form a stable glaze slurry. Water glass, acting as a solvent, not only fully disperses the raw materials but also participates in the reaction during firing, promoting the formation of a uniform glassy phase structure in the glaze layer. This structure allows light to pass through the glaze layer better, reducing light scattering and absorption, while simultaneously complementing the body color to achieve a color-matched effect from the surface to the interior of the tile. This unifies the overall aesthetics and visual lifespan, meeting people's needs for aesthetically pleasing and practical ceramic tiles.

[0012] Furthermore, the transparent glaze, by weight, also includes 0.1-1 parts catalyst, 0.5-1.5 parts carbon source, and 0.2-0.6 parts reducing agent.

[0013] Transparent glaze incorporates a catalyst, carbon source, and reducing agent. The catalyst plays a crucial role in the firing process, providing active sites for the decomposition of the carbon source, lowering the activation energy, and making it easier for the carbon source to decompose and produce carbon. The carbon source provides the carbon material for the growth of carbon nanotubes; under the action of the catalyst, carbon atoms arrange themselves in an orderly manner to form carbon nanotubes. The reducing agent decomposes during the reducing atmosphere firing stage, producing reducing gases and creating a suitable reducing environment for carbon nanotube growth. These three components work synergistically: the catalyst accelerates the decomposition of the carbon source, and the reducing agent provides the reducing atmosphere, jointly promoting the uniform growth of carbon nanotubes in the glaze layer, enhancing the adhesion between the glaze layer and the ceramic body, while simultaneously improving the transparency of the glaze layer and reducing black spots and streaks caused by impurities or structural inhomogeneities, resulting in a better color uniformity on the ceramic tile surface.

[0014] Furthermore, the catalyst includes iron oxide and composite materials containing iron oxide.

[0015] Iron oxide acts as a catalyst for carbon nanotube growth during the firing process. Its unique crystal structure and chemical properties effectively adsorb carbon atoms produced by the decomposition of the carbon source, guiding the carbon atoms to arrange themselves in a specific manner to form carbon nanotubes. The carbon nanotubes are more evenly distributed in the glaze layer, thus better enhancing the bonding between the glaze layer and the body, improving the transparency of the glaze layer, and achieving a more ideal color-matching effect on the body surface.

[0016] Furthermore, the catalyst is a MOFs@iron oxide composite material.

[0017] MOFs (Metal-Oxide-Film Formings) possess a highly ordered pore structure and a large specific surface area. Loading iron oxide within them allows for the uniform dispersion of iron oxide nanoparticles within the MOF framework, effectively preventing iron oxide agglomeration. During firing, MOFs decompose, releasing uniformly dispersed iron oxide nanoparticles. These nanoparticles act as catalysts for carbon nanotube growth, evenly distributed throughout the glaze layer. Due to the uniform distribution of iron oxide, the size and density of the catalyzed carbon nanotubes are easily controlled, maximizing glaze transparency while ensuring strong adhesion between the glaze and the ceramic body. Simultaneously, other substances generated from MOF decomposition may participate in the glaze formation process, further optimizing the glaze structure, reducing black spots and streaks, and resulting in a more pronounced color-matching effect on the tile surface.

[0018] Furthermore, the preparation method of MOFs@iron oxide composite material includes the following steps:

[0019] MIL-100(Fe) powder was dispersed in ethanol a to obtain a MIL-100(Fe) solution;

[0020] Nano-iron oxide particles were dispersed in ethanol b to obtain a nano-iron oxide solution;

[0021] The nano-iron oxide solution was mixed with the MIL-100 (Fe) solution to obtain a mixed solution;

[0022] The mixed solution was centrifuged, washed, and dried to obtain MOFs@iron oxide composite material.

[0023] MIL-100(Fe) powder was dispersed in ethanol (a) to obtain a solution, and nano-iron oxide particles were dispersed in ethanol (b) to obtain a solution, which were then mixed. The porous structure of MIL-100(Fe) provided space for the nano-iron oxide particles, allowing for thorough contact and mixing. Centrifugation, washing, and drying steps removed impurities and solvents, yielding a pure MOFs@iron oxide composite material. In this composite material, the iron oxide nanoparticles are uniformly dispersed within the structure after the decomposition of MIL-100(Fe). During subsequent tile firing, these nanoparticles are uniformly released as a catalyst, promoting carbon nanotube growth, improving glaze transparency and uniformity, reducing black spots and streaks, and playing a crucial role in achieving uniform color on the tile surface.

[0024] Furthermore, the ratio of MIL-100(Fe) to ethanol is 1g: 15-25mL;

[0025] The ratio of nano-iron oxide to ethanol is 1g: 200-300mL.

[0026] Furthermore, the carbon source includes glucose, and the reducing agent includes oxalic acid.

[0027] During the firing process, glucose decomposes under the action of a catalyst to produce carbon, providing a carbon source for the growth of carbon nanotubes. Its decomposition process is relatively stable, continuously providing carbon atoms, which is conducive to the orderly growth of carbon nanotubes. Oxalic acid decomposes at high temperatures to produce reducing gas (CO), creating a reducing atmosphere for carbon nanotube growth. In a reducing atmosphere, carbon atoms are more likely to arrange themselves in a specific pattern to form carbon nanotubes. Simultaneously, the reducing atmosphere prevents the oxidation of other components in the glaze, ensuring the quality of the glaze. Glucose and oxalic acid work synergistically; glucose provides the carbon source, and oxalic acid provides the reducing atmosphere, jointly promoting the uniform growth of carbon nanotubes in the glaze, enhancing the adhesion between the glaze and the body, improving the transparency of the glaze, and achieving a uniform color effect on the body and surface.

[0028] In the preparation of transparent glaze, glucose, the carbon source, generates carbon nanotubes under the synergistic effect of a catalyst and a reducing agent. MOFs@iron oxide composite material serves as the catalyst; its ordered porous structure ensures the uniform dispersion of iron oxide nanoparticles. After decomposition, these nanoparticles are evenly distributed throughout the glaze layer, providing uniform catalytic sites for carbon nanotube growth and allowing for controllable carbon nanotube size and distribution density. Glucose decomposition provides a stable and continuous supply of carbon, while oxalic acid decomposition creates a reducing atmosphere; the combination of these two factors enables the orderly growth of carbon nanotubes. Furthermore, the small size of the carbon nanotubes and their uniform dispersion within the glaze layer prevents them from forming large particles that scatter light and alter the microstructure of the glaze, thus preserving the transparency of the glaze.

[0029] This application also provides a method for preparing ceramic tiles with the same color on the body surface, comprising the following steps:

[0030] Step 1: Preparing the embryo, including the following steps:

[0031] Step 1-1: Mix the raw materials and ball mill them to obtain ball milling material;

[0032] Steps 1-2: Spray dry the ball milling material to obtain granular powder;

[0033] Steps 1-3: The granular powder is spread and pressed to form a blank.

[0034] Step 2: Prepare the transparent glaze, including the following steps:

[0035] Step A: Mix and ball mill the washed clay, medium white clay, talc powder, potassium sand, white clay, potassium sodium sand, sodium feldspar powder, and kaolin to obtain the first mixture.

[0036] Step B: Mix the first mixture with water glass until homogeneous to obtain a transparent glaze;

[0037] Step 2: Apply a transparent glaze to the surface of the body to obtain the body to be fired;

[0038] Step 3: Heat the material to 1200-1300℃ at a heating rate of 90-100℃ / hour, and fire it for 1.5-3 hours; cool it to obtain the pre-treated fired material.

[0039] Step 4: Introduce nitrogen gas and heat to 800-900℃ at a rate of 90-100℃ / hour to fire the pre-treated ceramic body. Hold at the temperature for 0.5-2 hours, then cool to obtain ceramic tiles with the same color on the surface.

[0040] This application also provides a method for preparing ceramic tiles with the same color on the body surface, including the following steps:

[0041] Step 1: Preparing the embryo, including the following steps:

[0042] Step 1-1: Mix the raw materials and ball mill them to obtain ball milling material;

[0043] Steps 1-2: Spray dry the ball milling material to obtain granular powder;

[0044] Steps 1-3: The granular powder is spread and pressed to form a blank.

[0045] Step 2: Prepare the slurry, including the following steps:

[0046] Step A: Mix and ball mill the washed clay, medium white clay, talc powder, potassium sand, white clay, potassium sodium sand, sodium feldspar powder, and kaolin to obtain the first mixture.

[0047] Step B: After ball milling, add catalyst and carbon source, and continue ball milling for 0.5-2 hours to obtain the second mixture.

[0048] Step C: Mix the second mixture with water glass until homogeneous to obtain a slurry;

[0049] Step 2: Apply the slurry to the surface of the blank to obtain the blank to be fired;

[0050] Step 3: Heat the material to 1200-1300℃ at a heating rate of 90-100℃ / hour, and fire it for 1.5-3 hours; cool it to obtain the pre-treated fired material.

[0051] Step 4: Mix oxalic acid with water to obtain an oxalic acid solution; spray the oxalic acid solution onto the surface of the pre-treated and fired blank.

[0052] Nitrogen gas is introduced, and the temperature is increased to 800-900℃ at a rate of 90-100℃ / hour. The pre-treated firing body coated with oxalic acid solution is fired, held at the temperature for 0.5-2 hours, and then cooled to obtain ceramic tiles with the same color as the body surface.

[0053] This application employs a two-step firing method. In the first step, during the preparation of the green body, the raw materials are ball-milled to ensure thorough and uniform mixing, followed by spray drying to obtain granular powder. This powder is then distributed and pressed to ensure a uniform and dense green body structure. In the preparation of the transparent glaze, the raw materials are ball-milled and then uniformly mixed with water glass to form a stable glaze slurry. After applying the glaze slurry, the first step involves firing at a specific heating rate to 1200-1300℃, allowing the glaze to melt and bond well with the green body, forming the basic glaze layer structure. After cooling, the second step introduces nitrogen to create a reducing atmosphere, and the temperature is raised again to 800-900℃ for firing. Oxalic acid decomposes to produce reducing gases, and under the action of an iron oxide catalyst, the carbon produced by the decomposition of glucose grows into carbon nanotubes. The carbon nanotubes form a mechanically interlocked structure with the glaze matrix, penetrating the glaze layer and anchoring at the interface between the green body and the glaze layer, enhancing the bonding force. The two-step firing process, combined with the synergistic effect of the raw materials, achieves uniform color on the green surface, reduces the difficulty and cost of controlling the reducing atmosphere, and improves the uniformity and controllability of carbon nanotube growth.

[0054] The two-step firing method has a clear division of labor. The first step ensures the bonding between the glaze layer and the body, and the second step optimizes the internal structure of the glaze layer and improves its transparency. Together, they achieve the same color effect on the body surface, reduce the special requirements for the kiln, and lower production costs.

[0055] During high-temperature firing, some carbon nanotubes embed into the interface between the body and the transparent glaze, increasing the mechanical interlocking between them and making the glaze layer and body more tightly bonded. Furthermore, during firing in a reducing atmosphere, the carbon nanotubes may chemically react with certain components in the body and glaze layer, forming chemical bonds and further enhancing the interfacial bonding. Simultaneously, the uniform distribution of carbon nanotubes in the glaze layer can improve the internal stress distribution, reducing glaze peeling caused by stress concentration, thereby enhancing the adhesion between the transparent glaze and the body.

[0056] Furthermore, the oxalic acid solution concentration is 5-15%.

[0057] Compared with the prior art, this application has the following beneficial effects:

[0058] 1. This application meticulously selects and scientifically proportions the raw materials for both the ceramic body and the glaze layer, laying a solid foundation for color consistency from the outset. The preparation process employs a unique two-step firing technique. In the first firing, precise control of temperature and heating rate ensures the glaze fully melts and adheres evenly to the ceramic body surface, initially forming a tightly bonded base layer. In the second step, under a reducing atmosphere, the reducing gas generated from the decomposition of oxalic acid synergistically interacts with the iron oxide catalyst, promoting the orderly growth of carbon from the decomposition of glucose into carbon nanotubes. These carbon nanotubes are evenly distributed within the glaze layer, optimizing its structure and effectively reducing color differences caused by uneven composition. This results in a high degree of color consistency between the ceramic body and the glaze layer, effectively achieving color uniformity across the ceramic tile surface.

[0059] 2. In the two-step firing process, the first firing allows the glaze and the body to initially fuse, forming a certain bonding force. In the second step, under a specific reducing atmosphere, the gas produced by the decomposition of oxalic acid, catalyzed by iron oxide, triggers the growth of carbon from the decomposition of glucose into carbon nanotubes. These carbon nanotubes act like countless tiny "bridges," weaving between the glaze layer and the body, forming a tight mechanical interlocking structure. This unique structure greatly enhances the adhesion between the glaze layer and the body, effectively resisting the effects of friction, impact, and temperature changes during daily use, preventing problems such as glaze peeling and cracking, ensuring stable and reliable performance of the tile during use, and extending the tile's service life.

[0060] 3. The production process described in this application has significant energy-saving advantages. The two-step firing method effectively reduces energy consumption while achieving high-quality ceramic tile production. The first firing step, through optimized heating curves and temperature control, shortens the firing time and improves energy utilization efficiency. The second step, at a relatively low temperature, utilizes a reducing atmosphere to promote the growth of carbon nanotubes, reducing dependence on high-temperature environments and further lowering energy requirements. Attached Figure Description

[0061] Figure 1 This is a picture of a ceramic tile with the same color as the ceramic body obtained in Example 2 of this application.

[0062] Figure 2 This is a tile drawing obtained from Comparative Example 2 of this application.

[0063] Figure 3 This is a comparison image of the ceramic tile with the same color as the ceramic tile obtained in Example 2 of this application (left) and the ceramic tile obtained in Comparative Example 2 (right). Detailed Implementation

[0064] To facilitate understanding of this application, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of this application.

[0065] This application provides a ceramic tile with a body and surface of the same color, comprising a body and a glaze layer, the glaze layer being coated on the surface of the body. The glaze layer is made of transparent glaze and fired.

[0066] The embryo, by weight, includes the following raw materials: 30-40 parts potassium feldspar, 10-20 parts dolomite, 1-5 parts zinc oxide, 5-10 parts strontium carbonate, 3-8 parts corundum, 3-8 parts washed clay, 5-10 parts wollastonite, 1-5 parts barium carbonate, and 10-15 parts frit.

[0067] The transparent glaze, by weight, comprises the following raw materials: 5-10 parts washed clay, 10-15 parts medium white clay, 3-8 parts talc powder, 15-25 parts potassium sand, 3-8 parts white clay, 25-35 parts potassium sodium sand, 5-10 parts albite powder, 5-10 parts kaolin, 390-420 parts water glass, 0.1-1 part catalyst, 0.5-1.5 parts carbon source, and 0.2-0.6 parts reducing agent.

[0068] Catalysts include iron oxide and composite materials containing iron oxide.

[0069] Carbon sources include glucose.

[0070] Reducing agents include oxalic acid.

[0071] The catalyst is preferably a MOFs@iron oxide composite material.

[0072] The preparation method of MOFs@iron oxide composite material includes the following steps:

[0073] Step a: Disperse MIL-100(Fe) powder in ethanol and sonicate for 20-40 minutes. The sonication power is 90-120W to obtain a MIL-100(Fe) solution.

[0074] The ratio of MIL-100(Fe) to ethanol is 1g: 15-25mL.

[0075] Step b: Disperse the nano-iron oxide particles in ethanol and sonicate for 20-40 minutes. The sonication power is 90-120W to obtain a nano-iron oxide solution.

[0076] The ratio of nano-iron oxide to ethanol is 1g: 200-300mL.

[0077] Step c: Slowly add the nano-iron oxide solution dropwise to the MIL-100 (Fe) solution and stir for 18-36 hours to obtain a mixed solution. The stirring speed is 250-350 rpm.

[0078] Step d: Centrifuge the mixed solution, wash it three times with ethanol, and vacuum dry it at 55-65℃ for 12-24 hours to obtain MOFs@iron oxide composite material.

[0079] The preparation method of transparent glaze includes the following steps:

[0080] Step A: Add the washed ball soil, medium white mud, talc powder, potassium sand, white mud, potassium sodium sand, sodium feldspar powder, and kaolin to the ball mill and mix and ball mill.

[0081] Control the ball mill speed to 55-65 rpm and the ball milling time to 6-12 hours to ensure that the raw materials are fully mixed and ground to obtain the first mixture.

[0082] Step B: After ball milling, add catalyst and carbon source, and continue ball milling for 0.5-2 hours to disperse iron oxide and glucose evenly, and obtain slurry.

[0083] Step C: Mix the second mixture with water glass until homogeneous to obtain a slurry.

[0084] The slurry needs to be combined with a reducing agent in the subsequent preparation of ceramic tiles of the same color to obtain a complete transparent glaze.

[0085] This application also provides a method for preparing ceramic tiles with the same color as the ceramic body, comprising the following steps:

[0086] Step 1: Preparing the embryo, including the following steps:

[0087] Step 1-1: Mix the raw materials and ball mill them to obtain ball milling material.

[0088] Steps 1-2: Spray dry the ball milling material to produce granular powder.

[0089] The spray drying tower has a top temperature of 600-700℃. The granular powder is spherical with a particle size of 0.15-1.0mm, of which powder with a particle size of 0.2-0.6mm accounts for 80-85wt% of the total.

[0090] Steps 1-3: Disperse the granular powder using a material spreading device, and then press it into shape using a brick press to obtain the brick body.

[0091] Step 2: Apply the slurry evenly to the surface of the blank, and then prepare the blank for firing.

[0092] The thickness of the glaze layer should be controlled to be 0.2-0.4 mm.

[0093] Step 3: First firing step:

[0094] The blank to be fired is placed in the kiln and heated to 1200-1300℃ at a heating rate of 90-100℃ / hour. Then it is held at 1200-1300℃ for 1.5-3 hours. It is then allowed to cool naturally to room temperature. The pre-treated fired blank is obtained.

[0095] Step 4: Second firing step:

[0096] Dissolve oxalic acid in water to prepare an oxalic acid solution with a concentration of 5-15%.

[0097] The oxalic acid solution is evenly sprayed onto the surface of the pre-treated fired body, with a spraying amount of 40-60 ml per square meter. At this point, the slurry that has undergone the first firing step in the pre-treated fired body comes into contact with the oxalic acid.

[0098] The pre-treated ceramic body, sprayed with oxalic acid solution, is then placed in a kiln. Nitrogen gas is introduced, and a small amount of coke powder (0.1-1% of the total solid raw materials) is added to create a reducing atmosphere. The temperature is raised to 800-900℃ at a rate of 90-100℃ / hour, held at 800-900℃ for 0.5-2 hours, and then allowed to cool naturally to room temperature. This yields ceramic tiles with the same color on the surface.

[0099] The present application will be further described below through specific embodiments. Example 1

[0100] A ceramic tile with a body and surface of the same color, comprising a body and a glaze layer, the glaze layer covering the surface of the body. The glaze layer is made of transparent glaze and fired.

[0101] The embryo material consists of the following raw materials: 35 kg potassium feldspar, 14 kg dolomite, 3 kg zinc oxide, 7 kg strontium carbonate, 6 kg corundum, 6 kg washed clay, 8 kg wollastonite, 3 kg barium carbonate, and 14 kg frit.

[0102] The transparent glaze comprises the following raw materials: 8 kg washed clay, 12 kg medium white clay, 5.5 kg talc powder, 20 kg potassium sand, 5 kg white clay, 29.2 kg potassium sodium sand, 8 kg sodium feldspar powder, 7.8 kg kaolin, 400 kg water glass, 0.5 kg catalyst, 1 kg carbon source, and 0.4 kg reducing agent.

[0103] The carbon source is glucose.

[0104] The reducing agent is oxalic acid.

[0105] The catalyst is a MOFs@iron oxide composite material.

[0106] The preparation method of MOFs@iron oxide composite material includes the following steps:

[0107] Step a: Disperse 5 g of MIL-100(Fe) powder in 100 mL of ethanol and sonicate for 30 minutes. The sonication power is 100 W to obtain a MIL-100(Fe) solution.

[0108] Step b: Disperse 0.2 g of nano-iron oxide particles in 50 mL of ethanol and sonicate for 30 minutes. The sonication power is 100 W, resulting in a nano-iron oxide solution.

[0109] Step c: Slowly add the nano-iron oxide solution dropwise to the MIL-100 (Fe) solution and stir for 24 hours to obtain a mixed solution. The stirring speed is 300 rpm.

[0110] Step d: The mixed solution was centrifuged, washed three times with ethanol, and vacuum dried at 60°C for 12 hours to obtain MOFs@iron oxide composite material.

[0111] The preparation method of transparent glaze includes the following steps:

[0112] Step A: Add the washed ball soil, medium white mud, talc powder, potassium sand, white mud, potassium sodium sand, sodium feldspar powder, and kaolin to the ball mill and mix and ball mill.

[0113] The ball mill speed was controlled at 60 rpm and the ball milling time was 8 hours to ensure that the raw materials were fully mixed and ground to obtain the first mixture.

[0114] Step B: After ball milling, add catalyst and carbon source, and continue ball milling for 1 hour to disperse iron oxide and glucose evenly, thus obtaining the second mixture.

[0115] Step C: Mix the second mixture with water glass until homogeneous to obtain a slurry.

[0116] The slurry needs to be combined with a reducing agent in the subsequent preparation of ceramic tiles of the same color to obtain a complete transparent glaze.

[0117] A method for preparing a ceramic tile with a body surface of the same color includes the following steps:

[0118] Step 1: Preparing the embryo, including the following steps:

[0119] Step 1-1: Mix the raw materials and ball mill them to obtain ball milling material.

[0120] Steps 1-2: Spray dry the ball milling material to produce granular powder.

[0121] The spray drying tower has a top temperature of 650℃. The granular powder is spherical with a particle size of 0.15-1.0 mm, of which powder with a particle size of 0.2-0.6 mm accounts for 85 wt% of the total.

[0122] Steps 1-3: Disperse the granular powder using a material spreading device, and then press it into shape using a brick press to obtain the brick body.

[0123] Step 2: Apply the slurry evenly to the surface of the 50mm×50mm×5mm body to obtain the body to be fired.

[0124] The glaze thickness is controlled to be 0.25 mm.

[0125] Step 3: First firing step:

[0126] The blank to be fired is placed in the kiln and heated to 1280℃ at a rate of 100℃ / hour. It is then held at 1280℃ for 2 hours. It is then allowed to cool naturally to room temperature. The pre-treated fired blank is obtained.

[0127] Step 4: Second firing step:

[0128] Dissolve oxalic acid in water to prepare a 10% oxalic acid solution.

[0129] Oxalic acid solution is evenly sprayed onto the surface of the pre-treated fired body, with a spraying amount of 50 ml per square meter. At this point, the slurry that has undergone the first firing step in the pre-treated fired body comes into contact with the oxalic acid.

[0130] The pre-treated ceramic body, sprayed with oxalic acid solution, is then placed in a kiln. Nitrogen gas is introduced, and a small amount of coke powder (0.5% of the total solid raw materials) is added to create a reducing atmosphere. The temperature is increased to 850°C at a rate of 100°C / hour, held at 850°C for 1 hour, and then allowed to cool naturally to room temperature. This yields ceramic tiles with the same color on the surface.

[0131] Performance testing:

[0132] 1. Color uniformity of the ceramic tile body: Experienced craftsmen were selected to observe the ceramic tile body of the sample and record the observation results.

[0133] Result: The color of the embryo surface was well consistent, with almost no color difference.

[0134] 2. Adhesion test: The test shall be conducted in accordance with GB / T 9286-2021, and the results shall be evaluated according to the standard grading table and recorded.

[0135] Test result: Level 0.

[0136] 3. Abrasion resistance test: The test shall be conducted in accordance with GB-T3810.7-2016.

[0137] Test results:

[0138] The wear rate is 2100 grinding revolutions, grade 4.

[0139] 4. Transparency test of transparent glaze: The transparency is tested according to GB / T2680-94 Method for Determination of Direct Transmission Ratio of Solar Light in Architectural Glass. After the transparent glaze is made into a glaze sheet and fired (1mm), the direct transmission rate of solar light is measured.

[0140] After preparing the slurry, it is spread to the specified thickness, then sprayed with oxalic acid solution, followed by the introduction of nitrogen gas and the addition of a small amount of coke powder (0.5% of the total solid raw materials) to create a reducing atmosphere. The temperature is increased to 850°C at a rate of 100°C / hour, held at 850°C for 1 hour, and then naturally cooled to room temperature to obtain glaze flakes.

[0141] Test result: 92%. Example 2

[0142] A ceramic tile with a body and surface of the same color, comprising a body and a glaze layer, the glaze layer covering the surface of the body. The glaze layer is made of transparent glaze and fired.

[0143] The embryo material consists of the following raw materials: 35 kg potassium feldspar, 14 kg dolomite, 3 kg zinc oxide, 7 kg strontium carbonate, 6 kg corundum, 6 kg washed clay, 8 kg wollastonite, 3 kg barium carbonate, and 14 kg frit.

[0144] The transparent glaze is prepared using the following raw materials: 8 kg washed clay, 12 kg medium white clay, 5.5 kg talc powder, 20 kg potassium sand, 5 kg white clay, 29.2 kg potassium sodium sand, 8 kg sodium feldspar powder, 7.8 kg kaolin, and 400 kg water glass.

[0145] The preparation method of transparent glaze includes the following steps:

[0146] Step A: Add the washed ball soil, medium white mud, talc powder, potassium sand, white mud, potassium sodium sand, sodium feldspar powder, and kaolin to the ball mill and mix and ball mill.

[0147] The ball mill speed was controlled at 60 rpm and the ball milling time was 8 hours to ensure that the raw materials were fully mixed and ground to obtain the first mixture.

[0148] Step B: Mix the first mixture with water glass until homogeneous to obtain a transparent glaze.

[0149] A method for preparing a ceramic tile with a body surface of the same color includes the following steps:

[0150] Step 1: Preparing the embryo, including the following steps:

[0151] Step 1-1: Mix the raw materials and ball mill them to obtain ball milling material.

[0152] Steps 1-2: Spray dry the ball milling material to produce granular powder.

[0153] The spray drying tower has a top temperature of 650℃. The granular powder is spherical with a particle size of 0.15-1.0 mm, of which powder with a particle size of 0.2-0.6 mm accounts for 85 wt% of the total.

[0154] Steps 1-3: Disperse the granular powder using a material spreading device, and then press it into shape using a brick press to obtain the brick body.

[0155] Step 2: Apply the transparent glaze evenly to the surface of the 50mm×50mm×5mm body to obtain the body to be fired.

[0156] The glaze thickness is controlled to be 0.25 mm.

[0157] Step 3: Place the blank to be fired into the kiln and heat it to 1280℃ at a rate of 100℃ / hour. Then hold it at 1280℃ for 2 hours. Allow it to cool naturally to room temperature. The pre-treated fired blank is now obtained.

[0158] Step 4: Place the pre-treated fired ceramic body into a kiln, introduce nitrogen gas, and add a small amount of coke powder (0.5% of the total solid raw materials) to create a reducing atmosphere. Heat to 850℃ at a rate of 100℃ / hour, hold at 850℃ for 1 hour, and allow to cool naturally to room temperature. This yields ceramic tiles with the same color as the ceramic body.

[0159] Performance test results:

[0160] 1. Color uniformity of the biscuit surface: The biscuit surface has a good color uniformity effect with almost no color difference.

[0161] 2. Adhesion test result: Level 1.

[0162] 3. Abrasion resistance test results: visible wear grinding revolutions: 750, grade: 3.

[0163] 4. Transparency test result of transparent glaze: 93%.

[0164] 5. Breaking strength: 2723N, modulus of rupture: 56.5MPa, water absorption rate: 0.037%. The ceramic tile with the same color as the blank surface obtained in Example 2 is a reference. Figure 1 . Example 3

[0165] The difference from Example 1 is that the catalyst is iron oxide.

[0166] Performance test results:

[0167] 1. Color uniformity of the biscuit surface: The biscuit surface has a good color uniformity effect with almost no color difference.

[0168] 2. Adhesion test result: Grade 0.

[0169] 3. Abrasion resistance test results: visible wear grinding revolutions: 1500, grade: 3.

[0170] 4. Transparency test result of transparent glaze: 87%.

[0171] Comparative Example 1

[0172] The difference from Example 2 is that it also includes 0.5 kg of commercially available carbon nanotubes.

[0173] Commercially available carbon nanotubes are added in step A and ball-milled together with other raw materials to obtain a first mixture.

[0174] Performance test results:

[0175] 1. Color uniformity of the biscuit surface: The color uniformity of the biscuit surface is generally poor, and color difference is visible to the naked eye.

[0176] 2. Adhesion test result: Level 2.

[0177] 3. Abrasion resistance test results: visible wear grinding revolutions: 750, grade: 3.

[0178] 4. Transparency test result of transparent glaze: 82%.

[0179] Comparative Example 2

[0180] The difference from Example 2 is that the transparent glaze is a commercially available transparent glaze.

[0181] Performance test results:

[0182] 1. Color consistency of the biscuit surface: The color consistency of the biscuit surface is good, with almost no color difference.

[0183] 2. Adhesion test result: Level 2.

[0184] 3. Abrasion resistance test results: visible wear grinding revolutions: 600, grade: 2.

[0185] 4. Transparency test result of transparent glaze: 88%.

[0186] The ceramic tile obtained in Comparative Example 2 of this application is referenced. Figure 2 .

[0187] A comparison diagram of the ceramic tile (left) with the same color as the ceramic body obtained in Example 2 of this application and the ceramic tile (right) obtained in Comparative Example 2 is shown below. Figure 3 .from Figure 3 It can be seen that the edge of the glaze layer of the ceramic tile in Comparative Example 2 is very obvious, with a white line-like dividing line visible to the naked eye; while the transition between the glaze layer and the body of Example 2 is natural, with no obvious dividing line.

[0188] The test data shows that the ceramic tiles with the same color on the body surface in Examples 1-3 have a good color matching effect. Regarding adhesion, Example 2 is not as effective as Examples 1 and 3, indicating that the use of catalysts, carbon sources, and reducing agents can indeed effectively improve the adhesion and wear resistance between the glaze layer and the body. Example 1, based on Example 3, further optimizes the catalyst, resulting in a better improvement in transparency.

[0189] Comparative Example 1 was based on Example 2, with carbon nanotubes added directly. The carbon nanotubes showed poor dispersion within the system and failed to produce good synergistic effects with other raw materials, resulting in unsatisfactory results.

[0190] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A porcelain tile with embryo face homochromy, characterized in that, The embryo and the glaze layer are included, the glaze layer is prepared from transparent glaze and covers the surface of the embryo; The embryo is prepared from the following raw materials by weight: 30-40 parts of potassium feldspar, 10-20 parts of dolomite, 1-5 parts of zinc oxide, 5-10 parts of strontium carbonate, 3-8 parts of corundum, 3-8 parts of washed soil, 5-10 parts of wollastonite, 1-5 parts of barium carbonate, and 10-15 parts of clinker; The transparent glaze is prepared from the following raw materials by weight: 5-10 parts of washed ball clay, 10-15 parts of medium white clay, 3-8 parts of talc powder, 15-25 parts of potassium sand, 3-8 parts of white clay, 25-35 parts of potassium-sodium sand, 5-10 parts of sodium feldspar powder, 5-10 parts of kaolin, and 390-420 parts of water glass.

2. Embossed ceramic tile according to claim 1, characterized in that, The transparent glaze further includes 0.1-1 part of a catalyst, 0.5-1.5 parts of a carbon source, and 0.2-0.6 parts of a reducing agent.

3. Embossed ceramic tile according to claim 2, characterized in that, The catalyst includes iron oxide and a composite material containing iron oxide.

4. The tile of claim 2, wherein The catalyst is a MOFs@iron oxide composite material.

5. Embossed ceramic tile according to claim 4, characterized in that, The preparation method of the MOFs@iron oxide composite material includes the following steps: MIL-100(Fe) powder is dispersed in ethanol a to obtain a MIL-100(Fe) solution; Nano-iron oxide particles are dispersed in ethanol b to obtain a nano-iron oxide solution; The nano-iron oxide solution and the MIL-100(Fe) solution are mixed to obtain a mixed solution; The mixed solution is centrifuged, washed, and dried to obtain the MOFs@iron oxide composite material.

6. Embossed ceramic tile according to claim 5, characterized in that, The amount of MIL-100(Fe) and ethanol is 1g: 15-25mL; The amount of nano-iron oxide and ethanol is 1g: 200-300mL.

7. The embryonic face-coloured tile according to claim 2, characterized in that, The carbon source includes glucose, and the reducing agent includes oxalic acid.

8. A method for producing a tile based on the body-face homochromaticity according to any one of claims 1, characterized in that, The method includes the following steps: Step 1: preparing the embryo, including the following steps: Step 1-1: mixing the raw materials and ball milling to obtain a ball milled material; Step 1-2: spray drying the ball milled material to obtain a granular powder; Step 1-3: distributing and pressing the granular powder to form the embryo; Step 2: preparing the transparent glaze, including the following steps: Step A: mixing the washed ball clay, medium white clay, talc powder, potassium sand, white clay, potassium-sodium sand, sodium feldspar powder, and kaolin and ball milling to obtain a first mixture; Step B: mixing the first mixture and water glass uniformly to obtain the transparent glaze; Step 2: applying the transparent glaze to the surface of the embryo to obtain a to-be-fired embryo; Step 3: heating at a heating rate of 90-100℃ / hour to 1200-1300℃, firing the to-be-fired embryo, maintaining the temperature for 1.5-3 hours, cooling, and obtaining an initial processing fired embryo; Step 4: introducing nitrogen, heating at a heating rate of 90-100℃ / hour to 800-900℃, firing the initial processing fired embryo, maintaining the temperature for 0.5-2 hours, and cooling to obtain a face-colored ceramic tile.

9. A method for producing a tile based on the homogenization of the face of the embryo according to any one of claims 2-7, characterized by, The method includes the following steps: Step 1: preparing the embryo, including the following steps: Step 1-1: mixing the raw materials and ball milling to obtain a ball milled material; Step 1-2: spray drying the ball milled material to obtain a granular powder; Step 1-3: distributing and pressing the granular powder to form the embryo; Step 2: preparing the slurry, including the following steps: Step A: mix water washed ball clay, middle white clay, talc powder, potash sand, white clay, potash soda sand, soda feldspar powder, kaolin clay by ball milling to obtain a first mixture; Step B: after the ball milling, add catalyst and carbon source and continue ball milling for 0.5-2 hours to obtain a second mixture; Step C: mix the second mixture with water glass to obtain a slurry; Step 2: apply the slurry on the surface of the green body to obtain a green body to be fired; Step 3: heat the green body to be fired at a heating rate of 90-100 ℃ / hour to 1200-1300 ℃, and keep the temperature for 1.5-3 hours; cool down to obtain a green body after initial firing; Step 4: mix oxalic acid with water to obtain an oxalic acid solution; spray the oxalic acid solution on the surface of the green body after initial firing; heat the green body after initial firing with the sprayed oxalic acid solution at a heating rate of 90-100 ℃ / hour to 800-900 ℃, keep the temperature for 0.5-2 hours, and cool down to obtain a porcelain tile with uniform surface color.

10. The method for preparing a tile with embryo facings according to claim 9, characterized in that, The concentration of the oxalic acid solution is 5-15%.

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