Mosaic tile with black border and imitation crystal glaze effect and preparation method thereof

Abstract

The present invention relates to the technical field of ceramic tile preparation, and discloses a mosaic tile with a black border and an imitation crystal glaze effect and a preparation method thereof. First, a black glossy base glaze is prepared, and a black base glaze is formed by adding a black colorant to the glaze; secondly, the shrinkage difference between the base glaze and the intermediate glaze during firing is utilized to achieve the effect of having a black border. Since the intermediate glaze has a low high-temperature viscosity, the ceramic ink has a poor color and the pattern is unclear; therefore, the third layer of the top glaze adopts a Ga-Ba glaze with good ceramic ink color and a fine matte glaze surface. Finally, a pattern is drawn according to the desired crystal flower effect, and the pattern is printed on the glaze surface using inkjet printing technology. The ceramic tile product prepared by this method not only has the effect of crystal glaze, but also its crystal flower effect, gloss and color are not restricted. In addition, the method can achieve stable production and has high repeatability.

Description

Technical Field

[0001] The invention belongs to the technical field of tile preparation, and in particular relates to a mosaic tile with a black frame and an imitation crystal glaze effect and a preparation method thereof. Background Art

[0002] Crystalline glaze is a highly decorative artistic glaze. During the firing process of the product, the glaze contains sufficient crystalline substances (melts), which are in a saturated state after melting. Crystallization is formed during the slow cooling process. These crystals are usually the crystal flowers we see in the fire glaze on the glaze surface.

[0003] However, crystalline glazes face challenges in production, including low yield rates, difficult production control, significant chemical composition changes at high temperatures, prone to color variations, high raw material purity requirements, high firing temperature accuracy requirements, and unpredictable crystal growth. Consequently, high production costs, low yield rates, and the difficulty of replicating and mass production have become inevitable. Furthermore, crystalline glazes are mostly glossy, making matte finishes even more challenging to achieve.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a mosaic tile with a black border and an imitation crystalline glaze effect and a preparation method thereof, aiming to solve the problem that the existing tiles with crystalline glaze effect are difficult to produce and the glaze surface is prone to defects, resulting in low yield.

[0006] The technical solutions of the present invention are as follows:

[0007] A method for preparing mosaic tiles with a black border and a simulated crystalline glaze effect, comprising the steps of:

[0008] preparing ceramic tile bodies;

[0009] Mixing ground glaze raw materials with water and then ball-milling to obtain ground glaze slurry, wherein the ground glaze raw materials include, by weight, 40-45 parts of potassium feldspar, 23-28 parts of calcite, 4-8 parts of calcined talc, 6-10 parts of black mud powder, 5-10 parts of quartz, 3-8 parts of zirconium silicate, 1-3 parts of calcined zinc oxide, 1-3 parts of aluminum oxide, and 3-6 parts of black colorant;

[0010] Mixing intermediate glaze raw materials with water and then ball-milling to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials include, by weight, 18-23 parts of potassium feldspar, 20-25 parts of sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 3-8 parts of barium carbonate, 5-10 parts of black mud powder, and 3-8 parts of zirconium silicate;

[0011] The glaze raw materials are mixed with water and then ball-milled to obtain a glaze slurry, wherein the glaze raw materials include, by weight, 30-35 parts of albite, 5-10 parts of calcite, 1-5 parts of calcined talc, 1-5 parts of zinc oxide, 5-10 parts of black mud powder, 2-7 parts of aluminum oxide, 4-9 parts of calcined kaolin, 10-15 parts of barium carbonate, 3-8 parts of Suzhou clay, and 12-17 parts of zirconium silicate;

[0012] The base glaze slurry, the intermediate glaze slurry and the top glaze slurry are sequentially sprayed onto the surface of the ceramic tile body by a glaze spraying method;

[0013] Printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer to obtain an initial tile;

[0014] The initial ceramic tiles are fired and cooled to obtain mosaic ceramic tiles with a black frame and an imitation crystal glaze effect.

[0015] The method for preparing the mosaic tile with a black border and a simulated crystal glaze effect, wherein the black colorant is cobalt black.

[0016] The method for preparing mosaic tiles with a black border and a simulated crystal glaze effect, wherein the glaze slurry has a specific gravity of 1.50 g / cm 3 , viscosity is 17s; the glaze slurry specific gravity of the intermediate glaze slurry is 1.65g / cm 3 , viscosity is 16s; the glaze slurry specific gravity is 1.68g / cm 3 , viscosity is 14s.

[0017] The method for preparing the mosaic tile with a black border and an imitation crystal glaze effect comprises spraying the bottom glaze slurry with a thickness of 0.5 mm, the middle glaze slurry with a thickness of 0.6 mm, and the top glaze slurry with a thickness of 0.6 mm.

[0018] The method for preparing the mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps: in the step of printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer, the amount of a single ink is controlled to be less than 50%.

[0019] The method for preparing mosaic tiles with a black border and an imitation crystal glaze effect includes the following steps: in the step of printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer, the printing height is 2-3 mm from the glaze.

[0020] The method for preparing the mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps: in the step of firing the initial tile, the sintering temperature is 1200-1300° C., and the sintering cycle is 30-60 minutes.

[0021] The method for preparing the mosaic tile with a black border and a simulated crystalline glaze effect, wherein the step of preparing the tile body comprises:

[0022] The green body raw materials are crushed, and then the crushed green body raw materials are weight-proportioned according to a set formula to obtain a green body raw material mixture;

[0023] The prepared green body raw material mixture is conveyed to a ball mill through a batching machine, water is added to the mixture until the water content by weight is 30%, and the ball mill is started to ball mill to the calibration coefficient to obtain green body raw material slurry;

[0024] Put the raw material slurry of the green body into the slurry pool and stir it evenly for homogenization;

[0025] The homogenized green body raw material slurry is pumped into the drying tower through the slurry pump. Under the action of hot air, the material is fluidized, dusted, atomized, and solidified. After reaching the required strength, the primary powder is produced. The primary powder is conveyed into the designated silo through the conveying system for aging, making the powder loose and the particle edges blunt, thus obtaining the green body powder.

[0026] The green body powder is transported to the press and pressed into shape under the pressure of the press to produce the ceramic tile green body.

[0027] The method for preparing mosaic tiles with a square crystal glaze effect comprises the following steps: the specific gravity of the green body raw material slurry is 1.68-1.72 g / cm3, the flow rate is 28-30 seconds, and the moisture content is 25-32%.

[0028] A mosaic tile with a black frame and an imitation crystal glaze effect is prepared by using any preparation method of the mosaic tile with a black frame and an imitation crystal glaze effect of the present invention.

[0029] Beneficial effect: The method of the present invention adjusts the formula of the three-layer glaze to achieve a delicate matte glaze with a black border and imitation crystal glaze effect. First, a black glossy base glaze is prepared, and a black base glaze is formed by adding a black colorant to the glaze; secondly, the shrinkage difference between the base glaze and the intermediate glaze during firing is utilized to achieve the effect of a black border. Since the intermediate glaze has a low viscosity at high temperature, the ceramic ink has poor color and the pattern is not clear; therefore, the third layer of surface glaze adopts Ga-Ba glaze with better ceramic ink color and a delicate matte glaze surface. Finally, a pattern is drawn according to the desired crystal flower effect, and the pattern is printed on the glaze surface using inkjet printing technology. The ceramic tile products prepared by this method not only have the effect of crystal glaze, but also have unrestricted crystal flower effect, gloss and color. In addition, this method can achieve stable production with high repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flow chart of a method for preparing a mosaic tile with a black border and a simulated crystalline glaze effect according to the present invention is shown;

[0031] Figure 2 This is a physical picture of the mosaic tile obtained in Example 1.

[0032] Figure 3 This is a physical picture of the mosaic tile prepared in Example 2.

[0033] Figure 4 This is a physical picture of the mosaic tile prepared in Example 3.

[0034] Figure 5 This is a physical picture of the mosaic tile prepared in Example 4. DETAILED DESCRIPTION

[0035] The present invention provides a mosaic tile with a black border and a simulated crystalline glaze effect and a method for preparing the same. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] See also Figure 1 , Figure 1 The flow chart of the preparation method of a mosaic tile with a black border and a simulated crystalline glaze effect provided by the present invention is shown in the figure, which includes the following steps:

[0037] S10, preparing a ceramic tile body;

[0038] S20, mixing ground glaze raw materials with water and then ball-milling to obtain ground glaze slurry, wherein the ground glaze raw materials include, by weight, 40-45 parts of potassium feldspar, 23-28 parts of calcite, 4-8 parts of calcined talc, 6-10 parts of black mud powder, 5-10 parts of quartz, 3-8 parts of zirconium silicate, 1-3 parts of calcined zinc oxide, 1-3 parts of aluminum oxide, and 3-6 parts of black colorant;

[0039] S30, mixing intermediate glaze raw materials with water and then ball-milling to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials include, by weight, 18-23 parts of potassium feldspar, 20-25 parts of sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 3-8 parts of barium carbonate, 5-10 parts of black mud powder, and 3-8 parts of zirconium silicate;

[0040] S40, mixing glaze raw materials with water and then ball-milling to obtain a glaze slurry, wherein the glaze raw materials include, by weight, 30-35 parts of albite, 5-10 parts of calcite, 1-5 parts of calcined talc, 1-5 parts of zinc oxide, 5-10 parts of black mud powder, 2-7 parts of aluminum oxide, 4-9 parts of calcined kaolin, 10-15 parts of barium carbonate, 3-8 parts of Suzhou clay, and 12-17 parts of zirconium silicate;

[0041] S50, using a glaze spraying method to sequentially spray the base glaze slurry, the intermediate glaze slurry and the top glaze slurry onto the surface of the ceramic tile body;

[0042] S60, printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer to obtain an initial tile;

[0043] S70, firing the initial ceramic tiles, and obtaining mosaic ceramic tiles with a black border and an imitation crystal glaze effect after cooling.

[0044] The ceramic tile product prepared by the method of the present invention not only has a black border and the effect of crystal glaze, but also has unrestricted crystal flower effect, gloss and color. In addition, the method can realize the stable production of mosaic tiles with high repeatability.

[0045] Specifically, the present invention incorporates potassium feldspar into the raw materials for the base and intermediate glazes, and sodium feldspar into the raw materials for the top glaze. This is because feldspar is a primary raw material for ceramic glazes and a key component in forming the glass phase. It has a wide melting range and high high-temperature viscosity, which broadens the glaze's melting and maturing temperature range, facilitating porcelain formation and reducing firing temperatures. This increases the gloss, transparency, and smoothness of the glaze layer, improves the glaze's chemical stability, and elevates the product's grade and quality. Potassium feldspar is added to the base and intermediate glazes because its key characteristics are its high hardness, strong compressive strength, and stability at high temperatures, thus extending its firing range. Sodium feldspar is incorporated into the intermediate and top glazes because it exhibits excellent optical properties and light transparency, resulting in a superior glaze color. Furthermore, sodium feldspar's high tensile strength reduces the surface tension of the top glaze, making it less susceptible to defects such as glaze shrinkage and pinholes.

[0046] The present invention adds 23-28 parts of calcite to the base glaze raw materials, introduces 20-25 parts of calcite to the intermediate glaze raw materials, and introduces 5-10 parts of calcite to the top glaze raw materials. This can lower the melting point of the glaze, promote the melting of the glaze, and thus improve the fluidity and moistness of the glaze. Adding calcite to the base glaze can facilitate the color development of the pigment, regulate the shrinkage rate of the glaze, and reduce the expansion coefficient of the glaze, so that the glaze surface is more compatible with the shrinkage rate of the blank, making the glaze more stable, thereby reducing defects such as deformation and cracking. Adding calcite to the intermediate glaze and top glaze can improve the product's crack resistance, heat resistance, and anti-fouling properties.

[0047] The present invention adds 4-8 parts of burnt talc to the base glaze raw materials. Since the main component of burnt talc, MgO, is an active cosolvent, it can play an emulsifying role, have a good covering effect on the green body, and can also reduce the expansion coefficient, reduce the cracking of the glaze, and increase the melting temperature.

[0048] The present invention adds 13-18 parts of calcined zinc oxide to the intermediate glaze raw material. Since zinc oxide is an inactive component of surface tension, it significantly increases the surface tension of the glaze. The greater the surface tension, the greater the glaze shrinkage, which can create a shrinkage difference between the intermediate glaze layer and the base glaze, thereby forming a frame with the color of the base glaze. It also reduces the high-temperature viscosity and thermal expansion coefficient of the glaze, improving its mechanical strength, chemical resistance, and thermal stability. Adding 1-5 parts of zinc oxide to the top glaze can significantly enhance the color development ability of ceramic ink in the glaze, especially reddish-brown and bright red colors.

[0049] The present invention introduces 10-15 parts of barium carbonate into the surface glaze, which can adjust the rheological properties of the glaze and make it have good covering performance. In addition, the addition of barium carbonate can also increase the wettability of the glaze, improve the binding force of the glaze layer, and achieve a better adhesion effect. At the same time, it can also improve the transparency of the glaze, improve the glaze texture, and make the glaze more transparent, bright, smooth and delicate. In addition, barium carbonate can also improve the color of the glaze, making it more vivid and bright. For ceramic ink, especially black ink, barium carbonate can improve its coloring ability. Therefore, the addition of barium carbonate can make the glaze smooth and beautiful, and have functions such as waterproofing, anti-fouling, and anti-corrosion. At the same time, it can also improve the glaze texture and improve the coloring ability of ceramic ink.

[0050] In some embodiments, the steps of preparing the ceramic tile body include: crushing each raw material of the ceramic tile body, and then mixing the crushed raw materials by weight according to a set formula to obtain a raw material mixture of the ceramic tile body; conveying the prepared raw material mixture of the ceramic tile body to a ball mill through a batching machine, adding water to the mixture until the water content by weight is 30%, and starting the ball mill to perform ball milling to a calibrated density to obtain a raw material slurry of the ceramic tile body. In order to improve the stability and fluidity of the raw material slurry of the ceramic tile body, 1.0%-2.0% sodium carboxymethyl cellulose and 0. 2-0.6% of Sichuan East Tripolymer; the raw material slurry of the green body is placed in a slurry pool and stirred evenly for homogenization; the homogenized raw material slurry of the green body is pressed into a drying tower through a slurry pump, and the material is fluidized, dust-removed, atomized, and solidified under the action of hot air (400-600℃), and primary powder is produced after meeting the strength requirements; the primary powder enters the set silo through the conveying system for aging, so that the powder distribution is loose and the particle edges are blunted to obtain green body powder; the green body powder is conveyed to the press, and is pressed into shape once under the pressure of the press to obtain the tile green body.

[0051] The raw materials used in this embodiment can be conventional ceramic tile raw materials, preferably traditional special materials from Xuri Ceramics, including 23-28 parts low-temperature glass powder, 30-35 parts high-white quartz, 20-25 parts white sand, 8-13 parts ball clay, and 7-11 parts water-washed clay. The present invention utilizes processes such as raw material crushing, ball milling, spray granulation, and aging to ensure ball mill fineness, moisture content, and spray granulation particle size. The properties of the raw material slurry of the green body in the present invention are as follows: specific gravity 1.68-1.72g / cm3, flow rate 28-30 seconds, moisture content 25-32%, 250 mesh sieve residue fineness <1.01, and no thixotropic property; the moisture content of the green body powder is 5.6-6.2%; the particle grading is <1% above 20 mesh, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh; the reasonable particle size distribution and uniform moisture content of the green body powder can improve the yield of press molding and reduce defects such as chipping, green body cracking, and deformation of the finished product. Therefore, the present invention adopts a one-time press molding technology to prepare the green body, thereby improving production efficiency, ensuring product stability, and reducing cost.

[0052] In some embodiments, the glaze slurry has a specific gravity of 1.50 g / cm 3 , viscosity is 17s; the glaze slurry specific gravity of the intermediate glaze slurry is 1.65g / cm 3 , viscosity is 16s; the glaze slurry specific gravity is 1.68g / cm 3 , and the viscosity is 14s. This embodiment can reduce defects such as glaze blistering, cracking, uneven glaze application, flower formation, and watermarks by properly controlling the specific gravity and viscosity of the glaze, thereby improving the yield and reducing costs.

[0053] In some embodiments, the thickness of the sprayed bottom glaze slurry is 0.5 mm, the thickness of the intermediate glaze slurry is 0.6 mm, and the thickness of the top glaze slurry is 0.6 mm. The present invention ensures the glazing thickness through the spray glazing process and reasonably controls the thickness of the glaze layer, which can reduce the expansion coefficient, increase the pressure in the glaze, and reduce the harmful stress in the glaze, thereby reducing glaze surface defects such as glaze shrinkage and glaze cracking, which is beneficial to the adaptability of the body glaze. In addition, the glaze layer thickness of the intermediate glaze layer has a great influence on the size of the frame. The thicker the glaze layer, the larger the frame. However, an excessively thick glaze layer is not conducive to the adaptability of the body glaze. Therefore, it is necessary to reasonably control the thickness of the glaze layer to achieve the desired effect and avoid defects such as glaze shrinkage and glaze cracking.

[0054] In some embodiments, in order to achieve the goal of a mosaic with an imitation crystalline glaze effect, this embodiment uses an inkjet printing process to design and print an ideal crystal flower effect. During the use of ceramic ink, due to its high temperature characteristics, too much ink may affect the gloss and effect of the glaze, so it is necessary to control the amount of single ink to less than 50%. In addition, since the ink is an oily material and is incompatible with water, the glaze surface cannot be too wet before entering the inkjet machine. If the glaze surface is too wet, the ink cannot spread evenly, which will cause watermarks, uneven colors, blurred graphics and other problems. To avoid these problems, a baking lamp can be added to dry the glaze before entering the inkjet machine; the printing height should be controlled within 2-3mm from the surface glaze. If the printing height is too low, the nozzle may be rubbed due to deformation of the blank, and if the height is too high, the printed graphics may be unclear.

[0055] In some embodiments, the firing step of the initial ceramic tile comprises a sintering temperature of 1200-1300°C and a sintering cycle of 30-60 minutes. In this embodiment, the green body is fired rapidly in a roller hearth kiln under a high-temperature oxidizing atmosphere. High-temperature, rapid firing significantly improves production efficiency, conserves energy and protects the environment, enhances product quality, and reduces energy consumption.

[0056] In the present invention, the main chemical components of the albite, potassium feldspar, calcite, quartz, Suzhou soil, black mud powder, calcined kaolin and burned talc are shown in Table 1.

[0057] Table 1 Chemical composition of mineral raw materials

[0058]

[0059] The present invention will be further explained below by means of specific embodiments:

[0060] Example 1

[0061] A method for preparing a mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps:

[0062] S1: Prepare the raw materials for the green body by mixing the raw materials according to the weight ratio, including 25 parts of low-temperature glass powder; 32 parts of high-white quartz; 22 parts of white sand; 10 parts of ball clay; and 9 parts of washed soil.

[0063] S2: Grinding the prepared green body raw materials to obtain green body raw material slurry;

[0064] S3: Place the green body raw material slurry into the slurry pool and stir it evenly for homogenization;

[0065] S4: The homogenized green body raw material slurry is sequentially fed into a powder making device and a silo for aging to obtain green body powder. The properties of the green body powder are as follows: moisture content of 5.6-6.2%; particle size distribution of powder is <1% for 20 mesh and above, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh;

[0066] S5: The green body powder is loaded into a long strip mold and conveyed to a press to produce a ceramic tile green body; the press pressure is 140 bar; the green body thickness is 6.6 mm;

[0067] S6: After mixing the base glaze raw materials with water, they are ball-milled to a fineness of about 0.05% on a 10,000-mesh sieve. After the glaze slurry is poured out, iron is removed and the base glaze slurry is passed through a 250-mesh sieve to obtain a base glaze slurry for later use. The base glaze raw materials include, by weight, 42 parts of potassium feldspar, 25 parts of calcite, 6 parts of burnt talc, 8 parts of black mud powder, 8 parts of quartz, 5 parts of zirconium silicate, 2 parts of calcined zinc oxide, 2 parts of aluminum oxide, and 4 parts of cobalt black; the glaze slurry has a specific gravity of 1.50 g / cm 3 , the glaze slurry viscosity is 17s;

[0068] S7. Mix the intermediate glaze raw materials with water and then ball-mill them. The fineness is controlled to be about 0.05% of the residue on a 10,000-mesh sieve. After the glaze slurry is poured out, iron is removed and the slurry is passed through a 250-mesh sieve to obtain an intermediate glaze slurry. The intermediate glaze raw materials include, by weight, 20 parts of potassium feldspar, 20 parts of sodium feldspar, 23 parts of calcite, 7 parts of quartz, 15 parts of calcined zinc oxide, 5 parts of barium carbonate, 7 parts of black mud powder, and 3 parts of zirconium silicate. The glaze slurry has a specific gravity of 1.65 g / cm 3 , glaze slurry viscosity is 16s;

[0069] S8. Mix the glaze raw materials with water and then ball-mill them. The fineness is controlled to be about 0.05% of the residue on a 10,000-mesh sieve. After the glaze slurry is poured out, iron is removed and the slurry is passed through a 250-mesh sieve to obtain a glaze slurry. The glaze raw materials include, by weight, 32 parts of albite, 8 parts of calcite, 3 parts of calcined talc, 3 parts of zinc oxide, 8 parts of black mud powder, 5 parts of aluminum oxide, 6 parts of calcined kaolin, 12 parts of barium carbonate, 6 parts of Suzhou clay, and 15 parts of zirconium silicate. The specific gravity of the glaze slurry is 1.68 g / cm 3 , the glaze slurry viscosity is 14s;

[0070] S9, using a glaze spraying method to spray the bottom glaze slurry, the middle glaze slurry and the top glaze slurry onto the surface of the ceramic tile body in sequence, with the bottom glaze thickness being 0.5 mm, the middle glaze thickness being 0.6 mm, and the top glaze thickness being 0.6 mm;

[0071] S10: Use PS software to design the effect of dot-shaped fine crystal flowers, and use a 6-channel Meika inkjet printer to print the designed crystal flower effect on the surface of the glaze. The ink used is red-brown;

[0072] S11: The green body is fired at high temperature, and after cooling, a translucent mosaic tile product is obtained. The green body is fired in a roller kiln under a high temperature oxidizing atmosphere to achieve rapid firing. The firing temperature is 1230 degrees and the firing cycle is 40 minutes.

[0073] The results of this experiment were as follows Figure 2 The matte mosaic tile with a black border and a dotted crystal effect is shown. Repeated testing has confirmed that this invention has a wide firing range, stable results, and strong repeatability. Testing of the matte mosaic with a simulated crystal glaze effect in this embodiment yielded the following results: water absorption of 0.06%; thermal shock resistance, frost resistance, and glaze crack resistance: acceptable; resistance to household chemicals and swimming pool salts: GA; resistance to low-concentration acids and alkalis: GLA; pollution resistance: 5; internal radiation index: I Ra :0.5, Class A; External exposure index I r : 0.8, Class A.

[0074] Example 2

[0075] A method for preparing a mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps:

[0076] S1: Prepare the raw materials for the green body by mixing the raw materials according to the weight ratio, including 23 parts of low-temperature glass powder; 30 parts of high-white quartz; 20 parts of white sand; 8 parts of ball clay; and 7 parts of washed soil.

[0077] S2: Grinding the prepared green body raw materials to obtain green body raw material slurry;

[0078] S3: Place the green body raw material slurry into the slurry pool and stir it evenly for homogenization;

[0079] S4: The homogenized green body raw material slurry is sequentially fed into a powder making device and a silo for aging to obtain green body powder. The properties of the green body powder are as follows: moisture content of 5.6-6.2%; particle size distribution of powder is <1% for 20 mesh and above, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh;

[0080] S5: The green body powder is loaded into a regular hexagonal mold and conveyed to a press to produce a ceramic tile green body; the press pressure is 140 bar; the green body thickness is 6.6 mm;

[0081] S6: mixing the base glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a base glaze slurry for later use. The base glaze raw materials include, by weight, 40 parts of potassium feldspar, 23 parts of calcite, 4 parts of calcined talc, 6 parts of black mud powder, 5 parts of quartz, 3 parts of zirconium silicate, 1 part of calcined zinc oxide, 1 part of aluminum oxide, and 3 parts of cobalt black;

[0082] S7. Mixing the intermediate glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials comprise, by weight, 20 parts of potassium feldspar, 20 parts of sodium feldspar, 20 parts of calcite, 7 parts of quartz, 18 parts of calcined zinc oxide, 8 parts of barium carbonate, 7 parts of black mud powder, and 3 parts of zirconium silicate;

[0083] S8. Mixing the glaze raw materials with water and ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a glaze slurry. The glaze raw materials comprise, by weight, 30 parts of albite, 5 parts of calcite, 1 part of calcined talc, 1 part of zinc oxide, 5 parts of black mud powder, 2 parts of aluminum oxide, 4 parts of calcined kaolin, 10 parts of barium carbonate, 3 parts of Suzhou clay, and 12 parts of zirconium silicate.

[0084] S9, spraying the base glaze slurry, the middle glaze slurry and the top glaze slurry onto the surface of the ceramic tile body in sequence by a glaze spraying method;

[0085] S7: Use PS software to design the effect of flaky crystal flowers, and use a 6-channel Meika inkjet printer to print the designed crystal flower effect on the surface of the glaze.

[0086] S8: The green body is fired at high temperature, and after cooling, a translucent mosaic tile product is obtained. The green body is fired in a roller kiln under a high temperature oxidizing atmosphere to achieve rapid firing. The firing temperature is 1230 degrees and the firing cycle is 40 minutes.

[0087] This example achieves a glossy ceramic mosaic with a black border and a flake crystal effect by adjusting the zinc oxide content of the intermediate glaze. Compared to Example 1, this example features a wider border and a brighter surface. Test results are similar to those of Example 1. Testing of the matte mosaic with a simulated crystal glaze effect in this example yielded the following results: water absorption of 0.05%; thermal shock resistance, frost resistance, and glaze crack resistance: acceptable; resistance to household chemicals and swimming pool salts: GA; resistance to low-concentration acids and alkalis: GLA; pollution resistance: 5; internal radiation index: I Ra :0.5, Class A; External exposure index I r : 0.8, Class A.

[0088] Example 3

[0089] A method for preparing a mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps:

[0090] S1: Prepare the raw materials for the green body by mixing the raw materials according to the weight ratio, including 28 parts of low-temperature glass powder; 35 parts of high-white quartz; 25 parts of white sand; 13 parts of ball clay; and 11 parts of washed soil.

[0091] S2: Grinding the prepared green body raw materials to obtain green body raw material slurry;

[0092] S3: Place the green body raw material slurry into the slurry pool and stir it evenly for homogenization;

[0093] S4: The homogenized green body raw material slurry is sequentially fed into a powder making device and a silo for aging to obtain green body powder;

[0094] S5: The green body powder is loaded into a regular hexagonal mold and conveyed to a press to produce a ceramic tile green body; the press pressure is 140 bar; the green body thickness is 6.6 mm;

[0095] S6: mixing the base glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a base glaze slurry for later use. The base glaze raw materials include, by weight, 45 parts of potassium feldspar, 28 parts of calcite, 8 parts of calcined talc, 10 parts of black mud powder, 10 parts of quartz, 8 parts of zirconium silicate, 3 parts of calcined zinc oxide, 3 parts of aluminum oxide, and 6 parts of cobalt black;

[0096] S7. Mixing the intermediate glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials comprise, by weight, 23 parts of potassium feldspar, 25 parts of sodium feldspar, 25 parts of calcite, 10 parts of quartz, 18 parts of calcined zinc oxide, 8 parts of barium carbonate, 10 parts of black mud powder, and 8 parts of zirconium silicate;

[0097] S8. Mixing the glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a glaze slurry, wherein the glaze raw materials comprise, by weight, 35 parts of albite, 10 parts of calcite, 5 parts of calcined talc, 5 parts of zinc oxide, 10 parts of black mud powder, 7 parts of aluminum oxide, 9 parts of calcined kaolin, 15 parts of barium carbonate, 8 parts of Suzhou clay, and 17 parts of zirconium silicate;

[0098] S9, spraying the base glaze slurry, the middle glaze slurry and the top glaze slurry onto the surface of the ceramic tile body in sequence by a glaze spraying method;

[0099] S7: Use PS software to design the effect of dot-shaped fine crystal flowers, and use a 6-channel Meika inkjet printer to print the designed crystal flower effect on the surface of the glaze. The inks used are magenta and orange inks.

[0100] S8: The green body is fired at high temperature, and after cooling, a translucent mosaic tile product is obtained. The green body is fired in a roller kiln under a high temperature oxidizing atmosphere to achieve rapid firing. The firing temperature is 1200 degrees and the firing cycle is 50 minutes.

[0101] The results of this experiment were as follows Figure 4 The matte mosaic tile with a regular hexagonal shape and a black border has a dotted crystal effect. Repeated testing has confirmed that this invention has a wide firing range, stable results, and strong repeatability. Testing of the matte mosaic with a simulated crystal glaze effect in this embodiment yielded the following results: water absorption of 0.06%; thermal shock resistance, frost resistance, and glaze crack resistance: acceptable; resistance to household chemicals and swimming pool salts: GA; resistance to low-concentration acids and alkalis: GLA; pollution resistance: 5; internal radiation index: I Ra :0.5, Class A; External exposure index I r : 0.8, Class A.

[0102] Example 4

[0103] A method for preparing a mosaic tile with a black border and an imitation crystal glaze effect comprises the following steps:

[0104] S1: Prepare the raw materials for the green body by mixing the raw materials according to the weight ratio, including 28 parts of low-temperature glass powder; 30 parts of high-white quartz; 25 parts of white sand; 8 parts of ball clay; and 10 parts of washed soil.

[0105] S2: Grinding the prepared green body raw materials to obtain green body raw material slurry;

[0106] S3: Place the green body raw material slurry into the slurry pool and stir it evenly for homogenization;

[0107] S4: The homogenized green body raw material slurry is sequentially fed into a powder making device and a silo for aging to obtain green body powder;

[0108] S5: The green body powder is conveyed to a press to produce a ceramic tile green body; the press pressure is 140 bar; the green body thickness is 6.6 mm;

[0109] S6: mixing the base glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a base glaze slurry for later use. The base glaze raw materials include, by weight, 42 parts of potassium feldspar, 24 parts of calcite, 5 parts of calcined talc, 10 parts of black mud powder, 5 parts of quartz, 3 parts of zirconium silicate, 1 part of calcined zinc oxide, 2 parts of aluminum oxide, and 3 parts of cobalt black;

[0110] S7. Mixing the intermediate glaze raw materials with water and subjecting them to ball milling to a fineness of about 0.05% on a 10,000-mesh sieve, removing iron from the glaze slurry, and passing it through a 250-mesh sieve to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials comprise, by weight, 18-23 parts of potassium feldspar, 20-25 parts of albite, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 3-8 parts of barium carbonate, 5-10 parts of black mud powder, and 3-8 parts of zirconium silicate;

[0111] S8. Mixing the glaze raw materials with water and then ball milling the mixture to a fineness of about 0.05% on a 10,000-mesh sieve, removing the iron from the glaze slurry, and passing the mixture through a 250-mesh sieve to obtain a glaze slurry, wherein the glaze raw materials comprise, by weight, 32 parts of albite, 8 parts of calcite, 5 parts of calcined talc, 1 part of zinc oxide, 10 parts of black mud powder, 7 parts of aluminum oxide, 4 parts of calcined kaolin, 12 parts of barium carbonate, 6 parts of Suzhou clay, and 12 parts of zirconium silicate;

[0112] S9, spraying the base glaze slurry, the middle glaze slurry and the top glaze slurry onto the surface of the ceramic tile body in sequence by a glaze spraying method;

[0113] S7: Use PS software to design the effect of dot-shaped fine crystal flowers, and use a 6-channel Meika inkjet printer to print the designed crystal flower effect on the surface of the glaze. The inks used are cobalt blue, praseodymium yellow, and orange.

[0114] S8: The green body is fired at high temperature, and after cooling, a translucent mosaic tile product is obtained. The green body is fired in a roller kiln under a high temperature oxidizing atmosphere to achieve rapid firing. The firing temperature is 1250 degrees and the firing cycle is 30 minutes.

[0115] The results of this experiment were as follows Figure 5 The regular hexagonal matte mosaic tile with a black border and a dotted crystal effect is shown. After repeated testing, it can be determined that this invention has a wide firing range, stable effect, and strong repeatability.

[0116] Compared with the preparation process of traditional crystalline glaze tiles, since crystalline glaze is affected by many factors, the growth of crystal flowers is difficult to control, the probability of defects on the glaze surface is high, production is difficult to control, repeatability is low, and cost is high. Based on this, the method provided by the present invention can design patterns according to the crystal flower effect we want, and obtain a glaze with a border effect by adjusting the proportion of the three glaze layers and controlling the glaze slurry properties and glazing parameters. The desired crystal flower effect is printed by an inkjet printing process to obtain mosaic tiles equivalent to the crystalline glaze effect. The process route of the present invention is simple, easy to achieve quantitative production, and the product has a delicate texture and excellent quality. It has a wide range of applications in the fields of architecture, home furnishing and art, and has a long service life.

[0117] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for preparing mosaic tiles with a black border and a simulated crystal glaze effect, characterized in that: Including steps: preparing ceramic tile bodies; Mixing ground glaze raw materials with water and then ball-milling to obtain ground glaze slurry, wherein the ground glaze raw materials include, by weight, 40-45 parts of potassium feldspar, 23-28 parts of calcite, 4-8 parts of calcined talc, 6-10 parts of black mud powder, 5-10 parts of quartz, 3-8 parts of zirconium silicate, 1-3 parts of calcined zinc oxide, 1-3 parts of aluminum oxide, and 3-6 parts of black colorant; Mixing intermediate glaze raw materials with water and then ball-milling to obtain an intermediate glaze slurry, wherein the intermediate glaze raw materials include, by weight, 18-23 parts of potassium feldspar, 20-25 parts of sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 3-8 parts of barium carbonate, 5-10 parts of black mud powder, and 3-8 parts of zirconium silicate; The glaze raw materials are mixed with water and then ball-milled to obtain a glaze slurry, wherein the glaze raw materials include, by weight, 30-35 parts of albite, 5-10 parts of calcite, 1-5 parts of calcined talc, 1-5 parts of zinc oxide, 5-10 parts of black mud powder, 2-7 parts of aluminum oxide, 4-9 parts of calcined kaolin, 10-15 parts of barium carbonate, 3-8 parts of Suzhou clay, and 12-17 parts of zirconium silicate; The base glaze slurry, the intermediate glaze slurry and the top glaze slurry are sequentially sprayed onto the surface of the ceramic tile body by a glaze spraying method; Printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer to obtain an initial tile; The initial ceramic tiles are fired and cooled to obtain mosaic ceramic tiles with a black frame and an imitation crystal glaze effect.

2. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: The black colorant is cobalt black.

3. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: The glaze slurry has a specific gravity of 1.50 g / cm 3 , viscosity is 17s; the glaze slurry specific gravity of the intermediate glaze slurry is 1.65g / cm 3 , viscosity is 16s; the glaze slurry specific gravity is 1.68g / cm 3 , viscosity is 14s.

4. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: The thickness of the sprayed bottom glaze slurry is 0.5mm, the thickness of the middle glaze slurry is 0.6mm, and the thickness of the top glaze slurry is 0.6mm.

5. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: In the step of printing the pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer, the amount of a single ink is controlled to be less than 50%.

6. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: In the step of printing a pre-designed crystal flower effect pattern on the surface of the glaze by an inkjet printer, the printing height is 2-3 mm from the glaze.

7. The method for preparing mosaic tiles with black borders and simulated crystalline glaze effects according to claim 1, characterized in that: In the step of firing the initial ceramic tiles, the firing temperature is 1200-1300° C. and the firing period is 30-60 minutes.

8. The method for preparing mosaic tiles with black borders and simulated crystal glaze effects according to claim 1, characterized in that: The steps of preparing the ceramic tile body include: The green body raw materials are crushed, and then the crushed green body raw materials are weight-proportioned according to a set formula to obtain a green body raw material mixture; The prepared green body raw material mixture is conveyed to a ball mill through a batching machine, water is added to the mixture until the water content by weight is 30%, and the ball mill is started to ball mill to the calibration coefficient to obtain green body raw material slurry; Put the raw material slurry of the green body into the slurry pool and stir it evenly for homogenization; The homogenized green body raw material slurry is pumped into the drying tower through the slurry pump. Under the action of hot air, the material is fluidized, dusted, atomized, and solidified. After reaching the required strength, the primary powder is produced. The primary powder is conveyed into the designated silo through the conveying system for aging, making the powder loose and the particle edges blunt, thus obtaining the green body powder. The green body powder is transported to the press and pressed into shape under the pressure of the press to produce the ceramic tile green body.

9. The method for preparing mosaic tiles with black borders and simulated crystal glaze effects according to claim 8, characterized in that: The specific gravity of the green body raw material slurry is 1.68-1.72 g / cm3, the flow rate is 28-30 seconds, and the moisture content is 25-32%.

10. A mosaic tile with a black border and an imitation crystal glaze effect, characterized in that: The mosaic tile with a black border and an imitation crystal glaze effect is prepared by the preparation method of any one of claims 1 to 9.

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