Mosaic tile with colored border and preparation method thereof

Abstract

The present invention relates to the technical field of tile preparation, and discloses a mosaic tile with a colored border and a preparation method thereof. A base glaze slurry, an intermediate glaze slurry and a surface glaze slurry are sprayed on a ceramic body in sequence. The required performance of each layer of glaze slurry is different. In particular, the crystalline glaze of the intermediate layer is one of the keys to controlling the shrinkage amplitude. The main function of the intermediate glaze is to shrink. However, during the shrinkage process, it must not only be firmly combined with the base glaze, but also drive the surface glaze to shrink synchronously, so that the overall effect of the glaze surface is that the border is the color of the base glaze, and the center is the color of the surface glaze. The present invention can achieve the production of stable mosaic tiles with a colored frame effect through formula optimization and process adjustment.

Description

Technical Field

[0001] The invention belongs to the technical field of tile preparation, and in particular relates to a mosaic tile with a colored border and a preparation method thereof. Background Art

[0002] Glaze shrinkage is a common phenomenon during ceramic firing. It can be explained as the curled glaze layer solidifying or separating from the base. The exposed bottom effect created by glaze shrinkage can be used for decorative purposes, thus creating aesthetically pleasing color-frame mosaic tiles.

[0003] However, when preparing color frame tiles in the existing technology, mosaic tiles with a color frame effect cannot be stably produced due to problems such as excessive shrinkage of the glaze when drying, too thick a glaze layer, insufficient viscosity and surface tension of the glaze when melting, the chemical composition of the glaze, and insufficient bonding strength between the body and the glaze.

[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 colored border and a preparation method thereof, aiming to solve the problem that the prior art cannot stably produce tiles with colored borders.

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

[0007] A method for preparing mosaic tiles with colored borders, 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, 48-53 parts of potassium feldspar, 10-16 parts of calcite, 2-4 parts of calcined talc, 5-10 parts of black mud powder, 3-6 parts of quartz, 2-5 parts of zirconium silicate, 2-4 parts of calcined zinc oxide, and 2-5 parts of 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, 17-22 parts of Gongxing sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 5-10 parts of barium carbonate, and 1-5 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, 40-46 parts of albite, 20-22 parts of dolomite, 0.5-1 part of zinc oxide, 5-10 parts of black mud powder, 10-15 parts of zirconium silicate, and 5-8 parts of desiliconized aluminum powder;

[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 to obtain an initial ceramic tile;

[0013] The initial ceramic tiles are fired and cooled to obtain mosaic ceramic tiles with colored borders.

[0014] The method for preparing mosaic tiles with colored borders, wherein the glaze slurry has a specific gravity of 1.55 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 1.70g / cm 3 , viscosity is 18s.

[0015] In the method for preparing mosaic tiles with colored borders, the thickness of the sprayed bottom glaze slurry is 0.5 mm, the thickness of the middle glaze slurry is 0.6 mm, and the thickness of the top glaze slurry is 0.8 mm.

[0016] The method for preparing the mosaic tiles with colored borders comprises the following steps: in the step of firing the initial tiles, the sintering temperature is 1200-1300° C., and the sintering period is 30-60 minutes.

[0017] The method for preparing mosaic tiles with colored borders, wherein the step of preparing the tile body comprises:

[0018] 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;

[0019] The prepared green body raw material mixture is conveyed to the ball mill through the batching machine, water is added to the mixture until the water content by weight is 18%, and the ball mill is started to ball mill to the calibration coefficient to obtain the green body raw material slurry;

[0020] Put the raw material slurry of the green body into the slurry pool and stir it evenly for homogenization;

[0021] The homogenized green body raw material slurry is pumped into the drying tower through a slurry pump. Under the action of hot air, the material is fluidized, dusted, atomized, and solidified to produce primary powder after reaching the required particle size. The primary powder is conveyed into the designated silo through a conveying system for aging, making the primary powder loosely distributed and the particle edges blunted to obtain green body powder.

[0022] 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.

[0023] The method for preparing mosaic tiles with colored borders, wherein the moisture content of the primary powder is 5.6-6.2%; the particle gradation of the primary powder is <1% for particles below 20 mesh, 15-25% for particles between 20-40 mesh, 40-50% for particles between 40-60 mesh, and 15-20% for particles between 60-80 mesh.

[0024] A mosaic tile with a colored border is prepared by using any preparation method of the mosaic tile with a colored border described in the present invention.

[0025] Beneficial effects: The present invention uses three glazing processes in the process, and the required performance of each layer of glaze slurry is different. In particular, the crystalline glaze in the middle layer is one of the keys to controlling the shrinkage amplitude. The present invention can achieve the production of stable mosaic tiles with color frame effects through formula optimization and process adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of a method for preparing mosaic tiles with colored borders according to the present invention is shown;

[0027] Figure 2 This is a physical picture of the mosaic tile obtained in Example 1.

[0028] Figure 3 This is a physical picture of the mosaic tile prepared in Example 2.

[0029] Figure 4 This is a physical picture of the mosaic tile prepared in Example 3.

[0030] Figure 5 This is a physical picture of the mosaic tile prepared in Example 4.

[0031] Figure 6 This is a physical picture of the mosaic tile prepared in Example 5. DETAILED DESCRIPTION

[0032] The present invention provides a mosaic tile with a colored border 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 further described below in detail. 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.

[0033] See also Figure 1 , Figure 1 The flow chart of the method for preparing a mosaic tile with a colored border provided by the present invention is shown in the figure, which includes the following steps:

[0034] S10, preparing a ceramic tile body;

[0035] 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, 48-53 parts of potassium feldspar, 10-16 parts of calcite, 2-4 parts of calcined talc, 5-10 parts of black mud powder, 3-6 parts of quartz, 2-5 parts of zirconium silicate, 2-4 parts of calcined zinc oxide, and 2-5 parts of colorant;

[0036] 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, 17-22 parts of Gongxing sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 5-10 parts of barium carbonate, and 1-5 parts of zirconium silicate;

[0037] S40, mixing the glaze raw materials with water and then ball milling to obtain a glaze slurry, wherein the glaze raw materials include, by weight, 40-46 parts of albite, 20-22 parts of dolomite, 0.5-1 part of zinc oxide, 5-10 parts of black mud powder, 10-15 parts of zirconium silicate, and 5-8 parts of desiliconized aluminum powder;

[0038] 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 to obtain an initial ceramic tile;

[0039] S60, firing the initial ceramic tiles, and obtaining mosaic ceramic tiles with colored borders after cooling.

[0040] Specifically, the main chemical components of the raw materials in each glaze in this embodiment, such as albite, potassium feldspar, calcite, quartz, black mud powder, and burned talc, are shown in Table 1.

[0041] Table 1 Chemical composition of mineral raw materials

[0042]

[0043] The present invention utilizes a three-stage glazing process. The use of MgO and Al2O3 in the first base glaze slurry reduces the thermal expansion coefficient and improves the fluidity of the glaze melt, allowing it to flatten on the body surface at high temperatures and effectively wet the body surface. By properly controlling the contents of Al2O3, ZnO, MgO, and other components in the glaze, the high-temperature viscosity is controlled, shrinkage during firing is avoided, and the glaze exhibits excellent fluidity, allowing the glaze to completely and smoothly coat the surface and bond with the body, leaving a base color for the colored frame mosaic. The base glaze has a low shrinkage coefficient, preventing cracks in the glaze layer during fusion drying and firing during the preheated zone, which can lead to uneven shrinkage and drawing.

[0044] The intermediate glaze used in the second glaze application is a crystalline glaze. Its primary function is to shrink. During this shrinkage process, it must not only securely bond with the base glaze but also simultaneously shrink the top glaze, resulting in an overall glaze effect where the base glaze's color is displayed in the frame and the top glaze's color is displayed in the center. The size of the intermediate glaze's shrinkage determines the size of the color frame, and the formulation of the intermediate glaze is the core of this invention.

[0045] The third glaze of the present invention is a matte white glaze. This glaze has a strong covering power and can perfectly cover the middle glaze without revealing the base color. This creates a harmonious blend of two colors in the color-frame mosaic, without any intervening color. The glaze surface is smooth and harmonious. In future research, it is possible to replace the matte white glaze with other colors to create more color contrasts.

[0046] In some embodiments, the glaze slurry has a specific gravity of 1.55 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 1.70g / cm 3 , the viscosity is 18s; 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 surface glaze slurry is 0.8mm. The glaze slurry of the present invention needs to be ball-milled strictly according to the material-ball-water ratio. The thickness of each glaze layer of the three glazings must meet the requirements to avoid affecting the shrinkage effect. An appropriate amount of electrolyte is introduced into the glaze slurry to improve the glaze slurry performance, which can increase the adsorption force of the glaze on the blank and make the glaze slurry have better fluidity and easy glazing operation. In this embodiment, the viscosity of the glaze slurry needs to be in accordance with the above parameters. If it is too sticky, it will cause difficulty in glazing and the glaze surface will be too wet. If the viscosity is too low, there will be defects such as glaze deficiency and bubbling on the glazed surface.

[0047] In some embodiments, the steps of preparing a ceramic tile body include: crushing each body raw material, and then weight-proportioning the crushed body raw materials according to a set formula to obtain a body raw material mixture; conveying the prepared body raw material mixture to a ball mill via a batching machine, adding water to the mixture to a water content of 18% by weight, starting the ball mill and ball milling it to a calibration degree to obtain a body raw material slurry; placing the body raw material slurry into a slurry pool, stirring it evenly for homogenization; pressing the homogenized body raw material slurry into a drying tower through a slurry pump, and fluidizing, dust-removing, atomizing, and solidifying the material under the action of hot air (400-600°C) to produce a primary powder after meeting the particle size requirements; the primary powder enters a set silo through a conveying system for aging, so that the primary powder is loosely distributed and the particle edges are blunted to obtain a body powder; conveying the body powder to a press, and pressing it into shape once under the pressure of the press to obtain a ceramic tile body.

[0048] In this embodiment, the surface of the prepared ceramic body is cleaned before glazing, and a certain water absorption rate and moisture content must be maintained to ensure the bonding between the glaze and the body. The body raw materials used in this embodiment can be conventional ceramic tile raw materials in the field, preferably traditional Sunrise Ceramics special materials, for example, 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 uses processes such as raw material crushing, ball milling, spray granulation, and aging to ensure ball mill fineness, moisture content, and spray granulation particle size.

[0049] In this embodiment, the moisture content of the primary powder is 5.6-6.2%; the particle size distribution of the primary powder is <1% below 20 mesh, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh. A reasonable particle size distribution and uniform moisture content in the green body powder can improve the yield rate of press molding and reduce defects such as chipping, cracking, and deformation in the finished product. Therefore, the present invention uses a one-step press molding technology to prepare the green body, thereby improving production efficiency, ensuring product stability, and reducing costs.

[0050] In some embodiments, the base glaze raw materials include, by weight, 48-53 parts potassium feldspar, 10-16 parts calcite, 2-4 parts talc, 5-10 parts black mud powder, 3-6 parts quartz, 2-5 parts zirconium silicate, 2-4 parts calcined zinc oxide, and 2-5 parts colorant. The base glaze formula in this embodiment is a glossy glaze, which uses very few raw materials with high shrinkage to avoid glaze shrinkage. The low amount of potassium feldspar ensures the glaze's gloss and transparency, while the zinc oxide, talc, and calcite can reduce the coefficient of thermal expansion, ensuring a smooth, flat glaze surface with minimal deformation. This glaze generates a large amount of liquid phase during the firing process, which is less affected by the shrinkage of the intermediate glaze and allows it to connect with the intermediate glaze during the shrinkage process, ensuring the color effect of the colored frame. In this embodiment, the colorants include cobalt black, wrapped pure yellow, wrapped orange, etc., but are not limited to these.

[0051] The calcite content in the base glaze of this embodiment should not be too low, as calcite is a key solvent in this formulation. Too little calcite will increase the glaze's high-temperature viscosity, preventing the glaze from shrinking easily and affecting the size of the colored border. Excessive calcite content should also be avoided, as it will reduce the glaze's high-temperature viscosity and dissolve the top glaze, resulting in defects such as black spots.

[0052] In some embodiments, the intermediate glaze raw materials include, by weight, 18-23 parts potassium feldspar, 17-22 parts sodium feldspar, 20-25 parts calcite, 5-10 parts quartz, 13-18 parts calcined zinc oxide, 5-10 parts barium carbonate, and 1-5 parts zirconium silicate. The intermediate glaze in this embodiment is a crystalline glaze, specifically designed to achieve a shrinking display frame effect. Most of the raw materials in this formula are of relatively low temperature. Low-temperature potassium feldspar and sodium feldspar are used as solvents, and barium carbonate is used as a co-solvent to lower the melting point of some substances, so that many liquid phases can be produced during the firing process; zinc oxide is the most important ingredient in this formula and is also the main factor affecting the shrinkage of the glaze. Zinc oxide is a surface tension inactive component that will increase the surface tension. The more zinc oxide is added, the greater the surface tension of the glaze and the greater the shrinkage; zinc oxide can reduce defects such as bubbles and pinholes caused by shrinkage after being calcined at a high temperature of 1200-1300℃; the addition of quartz is also to increase the viscosity in the molten state, increase the surface tension, and promote the shrinkage of the middle glaze layer; calcite is mainly to reduce the thermal expansion coefficient of the glaze layer, reduce its influence on shrinkage, and enable the glaze shrinkage to proceed stably.

[0053] In some embodiments, the top glaze raw materials include, by weight, 40-46 parts albite, 20-22 parts dolomite, 0.5-1 part zinc oxide, 5-10 parts black mud powder, 10-15 parts zirconium silicate, and 5-8 parts desiliconized aluminum powder. In this embodiment, the top glaze is a matte white glaze with a zirconium silicate content of 10% or greater, making the glaze layer relatively hot and difficult to melt. The addition of dolomite can lower the firing temperature without affecting whiteness, eliminating wrinkles on the glaze surface. The addition of aluminum oxide can also increase fluidity, allowing it to shrink with the intermediate glaze.

[0054] The present invention addresses the problems of excessive shrinkage of the glaze during drying, an overly thick glaze layer, viscosity and surface tension of the glaze during melting, the influence of colorants added to the glaze, and the bonding strength between the body and glaze. By optimizing the formula and adjusting the process, a mosaic tile with a color frame effect having stable glaze shrinkage can be produced.

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

[0057] Example 1

[0058] A method for preparing mosaic tiles with colored borders comprises the following steps:

[0059] S1: Grinding raw materials: Grind each raw material and pass it through a 10-mesh sieve;

[0060] S2: Batching and ball milling: The raw materials are mixed according to the set ratio, and the mixed powder is transported to the ball mill through the batching machine. Water is added to the mixture until the water content by weight is 18%. The ball mill is started and ball milled to the calibrated fineness;

[0061] S3: Mud homogenization: put the mud of qualified fineness into the mud pool and stir it evenly;

[0062] S4: Spray drying: The homogenized slurry is pumped into the drying tower by a slurry pump. The atomizer atomizes the slurry into fine droplets. The hot air (400-600℃) in the drying tower dries and dehydrates the slurry to form powder particles. The particles flow out through the discharge port, while the air containing fine powder and water vapor passes through the bag filter to collect the fine powder. The air is then dedused in a water bath and discharged from the exhaust fan.

[0063] S5: Silo aging: The powder enters the designated silo through the conveying system and is placed for an appropriate period of time to further homogenize the moisture content of the powder. The moisture content of the powder is 5.6-6.2%; the particle size distribution of the powder is less than 1% below 20 mesh, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh.

[0064] S6: Powder molding: The powder is conveyed to the press for molding. When pressure is applied to the blank, the powder particles are squeezed by the pressure and begin to move and move closer to each other. The blank shrinks and the air is expelled. The maximum pressure is 160 bar and the thickness is 10 mm.

[0065] S7, mixing the ground glaze raw materials with water and then ball milling to obtain a ground glaze slurry, wherein the ground glaze raw materials include, by weight, 48-53 parts of potassium feldspar, 10-16 parts of calcite, 2-4 parts of calcined talc, 5-10 parts of black mud powder, 3-6 parts of quartz, 2-5 parts of zirconium silicate, 2-4 parts of calcined zinc oxide, and 2-5 parts of a colorant, wherein the colorant is wrapped orange;

[0066] S8, 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, 17-22 parts of Gongxing sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 5-10 parts of barium carbonate, and 1-5 parts of zirconium silicate;

[0067] S9, mixing the glaze raw materials with water and then ball milling to obtain a glaze slurry, wherein the glaze raw materials include, by weight, 40-46 parts of albite, 20-22 parts of dolomite, 0.5-1 part of zinc oxide, 5-10 parts of black mud powder, 10-15 parts of zirconium silicate, and 5-8 parts of desiliconized aluminum powder;

[0068] S10: Glazing: Use a spray gun to apply glaze to the formed body. The distance between the body and the spray gun, the spraying pressure, the number of sprays and the relative density of the glaze slurry determine the thickness of the glaze layer. The number of sprays is controlled to be three. The specific gravity of the glaze slurry for one glazing is 1.55g / cm 3 , flow rate 18s, glaze layer 0.5mm. Secondary glazing: glaze slurry specific gravity 1.65g / cm 3 , flow rate 16s, glaze layer 0.6mm, three glazings: glaze slurry specific gravity 1.70g / cm 3 , flow rate 18s, glaze layer 0.8mm;

[0069] S11: Firing: Rapid firing is achieved in a roller kiln in a high-temperature oxidizing atmosphere. The firing temperature is 1250 degrees and the firing cycle is 50 minutes.

[0070] In this embodiment, the base glaze and the surface glaze are both glazes prepared in advance, so the on-site material mixing and ball milling are mainly carried out for the middle glaze. The color adjustment is completed in the base glaze. In this case, the base glaze is added with wrapped pure yellow and wrapped orange, stirred, and the parameters and performance are adjusted and set aside. The middle glaze is ball-milled according to the raw material ratio, and the fineness is 250 mesh sieve, and the sieve residue is about 0.05%. The parameters are adjusted and set aside. The final surface glaze is directly taken from the white glaze and the parameters are adjusted and set aside. The blank used this time is a medium hexagon, which is sprayed with glaze in sequence and finally sent to the kiln. After firing, a dark yellow equilateral hexagonal frame is obtained surrounding a white hexagon in the center, as shown Figure 2 As shown in Table 2, the color frame mosaic not only has a unique decorative effect, but also has excellent performance, and its various performances are better than the national standards.

[0071] Table 2 Performance of color frame mosaic tiles

[0072]

[0073] From the data in Table 2, it can be seen that the tiles produced by the present invention are high-quality products that meet various standards and are developed and produced in strict accordance with requirements that are superior to national standards. Figure 2 It can be seen that the glaze surface of the color frame mosaic produced in this embodiment is flat and smooth, without any variegated colors, the shrinkage edge is of appropriate size and not abrupt, the colors blend harmoniously, and the overall color is bright and colorful; the connection between the shrinkage glaze and the base glaze is smooth, with little concave and convex feeling; the difference in gloss can make the color contrast more intense, achieving a new decorative effect.

[0074] This invention has achieved a new breakthrough in modeling, forming a distinct and regularly shaped two-color combination on the mosaic tiles. Different color edge contours are obtained by adding different colorants. The unique color combination is a staggered combination of warm and cold colors with clear primary and secondary colors. The pure white tiles are the main center, and the delicate touch of the pure color tiles can create an unexpected color collision.

[0075] Example 2

[0076] The preparation method of the mosaic tiles in this embodiment is the same as that in Example 1. The only difference is that the ceramic body in this embodiment is square. The mosaic tiles prepared in this embodiment are as follows: Figure 3 As shown, similarly, the glaze surface of the color frame mosaic produced in this embodiment is flat and smooth, without variegated colors, the shrinkage edge is of appropriate size and not abrupt, the colors blend harmoniously, and the overall color is bright and colorful.

[0077] Example 3

[0078] The preparation method of the mosaic tiles of this embodiment is the same as that of embodiment 1, the only difference being that the ceramic body in this embodiment is a regular hexagon. The mosaic tiles prepared in this embodiment are as follows: Figure 4 As shown, similarly, the glaze surface of the color frame mosaic produced in this embodiment is flat and smooth, without variegated colors, the shrinkage edge is of appropriate size and not abrupt, the colors blend harmoniously, and the overall color is bright and colorful.

[0079] Example 4

[0080] The preparation method of the mosaic tiles in this embodiment is the same as that in Example 1. The only difference is that the ceramic body in this embodiment is round and the colorant used in this embodiment is cobalt black. The mosaic tiles prepared in this embodiment are as follows. Figure 5 As shown, similarly, the black frame mosaic glaze surface prepared in this embodiment is flat and smooth without any variegated colors, and the shrinkage edge is of appropriate size and not abrupt.

[0081] Example 5

[0082] The preparation method of the mosaic tiles of this embodiment is the same as that of Example 1. The only difference is that the ceramic body in this embodiment is a parallelogram and the colorant used in this embodiment is cobalt black. The mosaic tiles prepared in this embodiment are as follows. Figure 6 As shown, similarly, the black frame mosaic glaze surface prepared in this embodiment is flat and smooth without any variegated colors, and the shrinkage edge is of appropriate size and not abrupt.

[0083] 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 colored borders, 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, 48-53 parts of potassium feldspar, 10-16 parts of calcite, 2-4 parts of calcined talc, 5-10 parts of black mud powder, 3-6 parts of quartz, 2-5 parts of zirconium silicate, 2-4 parts of calcined zinc oxide, and 2-5 parts of 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, 17-22 parts of Gongxing sodium feldspar, 20-25 parts of calcite, 5-10 parts of quartz, 13-18 parts of calcined zinc oxide, 5-10 parts of barium carbonate, and 1-5 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, 40-46 parts of albite, 20-22 parts of dolomite, 0.5-1 part of zinc oxide, 5-10 parts of black mud powder, 10-15 parts of zirconium silicate, and 5-8 parts of desiliconized aluminum powder; 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 to obtain an initial ceramic tile; The initial ceramic tiles are fired and cooled to obtain mosaic ceramic tiles with colored borders.

2. The method for preparing mosaic tiles with colored borders according to claim 1, characterized in that: The glaze slurry has a specific gravity of 1.55 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 1.70g / cm 3 , viscosity is 18s.

3. The method for preparing mosaic tiles with colored borders 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 0.8mm.

4. The method for preparing mosaic tiles with colored borders 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.

5. The method for preparing mosaic tiles with colored borders 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 the ball mill through the batching machine, water is added to the mixture until the water content by weight is 18%, and the ball mill is started to ball mill to the calibration coefficient to obtain the 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 a slurry pump. Under the action of hot air, the material is fluidized, dusted, atomized, and solidified to produce primary powder after reaching the required particle size. The primary powder is conveyed into the designated silo through a conveying system for aging, making the primary powder loosely distributed and the particle edges blunted to obtain 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.

6. The method for preparing mosaic tiles with colored borders according to claim 5, characterized in that: The moisture content of the primary powder is 5.6-6.2%; the particle size distribution of the primary powder is <1% below 20 mesh, 15-25% for 20-40 mesh, 40-50% for 40-60 mesh, and 15-20% for 60-80 mesh.

7. A mosaic tile with a colored border, characterized in that: The mosaic tile with a colored border is prepared by the preparation method of any one of claims 1 to 6.

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