Multicolor crystal effect ceramic tile and process for the production thereof

Abstract

The application discloses a preparation process of a multi-color crystal effect ceramic tile, and comprises the following steps: S1, at least two color dry particles are mixed with fluxing dry particles, then printing paste and printing oil are added to prepare at least two colored glaze slurries, and the colored glaze slurries are prepared for standby; S2, a protective glaze slurry is prepared for standby; S3, a base glaze is applied on the surface of a body, and an inkjet printing pattern is printed; S4, the colored glaze slurries are screen-printed on the surface of the body according to preset patterns; S5, protective dry particles are applied on the surface of the body; S6, the protective glaze slurry is applied on the surface of the body; S7, the body with the applied glaze is fired, and the multi-color crystal effect ceramic tile is obtained. The color dry particles are applied by using a wet glaze slurry, the color dry particles and the fluxing dry particles are fused first, and then the fused color dry particles and the fluxing dry particles are fused with the protective dry particles, so that the multi-color crystal effect with bright and transparent colors is formed, the real stone texture is restored, and compared with a traditional dry material process, the production stability is higher, the glaze surface is smoother, and the lightness difference is lower.

Description

Technical Field

[0001] This invention relates to the field of building ceramics, and in particular to a multi-colored crystal effect ceramic tile and its preparation process. Background Technology

[0002] Imitation marble ceramic tiles are highly sought after in the high-end ceramic market due to their exquisite patterns, realistic effects, and diverse surface finishes. Currently, to achieve a more closely resemble the crystalline texture of natural marble, most imitation marble ceramic tiles on the market directly use various colored dry granules instead of screen-printed glazes for color development. Compared to traditional printed glazes, colored dry granules offer a greater sense of color and three-dimensionality, thus replicating the crystalline effect of natural stone.

[0003] However, directly using dry pigment particles to replace traditional printing enamels still presents some technical challenges:

[0004] 1. The various colors of dry granules are difficult to melt and cannot be well melted into the protective dry granules, making it difficult to form a clear and bright color in the stone, thus covering the original inkjet color;

[0005] 2. Because the dry pigment particles cannot be completely melted, they will remain in an accumulated state during firing, which can easily cause uneven glaze and huge differences in glaze gloss, affecting the appearance of the kiln-fired bricks.

[0006] 3. In order to solve the problem of unevenness that may occur on the glaze, it is usually necessary to apply a large amount of protective dry granules. After firing, the marble tiles are polished and cut to make them smooth. The cost of glaze and polishing is high. Summary of the Invention

[0007] The main objective of this invention is to propose a preparation process for multi-colored crystal effect ceramic tiles, which can use dry colored particles to replace traditional printed glazes to prepare ceramic tiles with a multi-colored crystal effect that imitates natural stone. Moreover, the prepared ceramic tiles have high surface flatness and small gloss difference.

[0008] To achieve the above objectives, this invention proposes a preparation process for multi-colored crystal effect ceramic tiles, comprising the following steps:

[0009] S1. Mix at least two colors of dry granules with fluxing dry granules, then add printing paste and printing oil to prepare at least two colored glaze pastes for later use.

[0010] S2. Mix the protective glaze powder, water, methylcellulose, sodium tripolyphosphate and ceramic adhesive to make a protective glaze slurry for later use;

[0011] S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing.

[0012] S4. The various colored glazes obtained in step S1 are screen-printed onto the surface of the blank obtained in step S3 according to the preset pattern texture.

[0013] S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied.

[0014] S6. Apply the protective glaze slurry prepared in step S2 to the surface of the blank obtained in step S5.

[0015] S7. The glazed body obtained in step S6 is fired to obtain the multicolored crystal effect ceramic tile.

[0016] This invention uses a mixture of color dry granules and flux dry granules to create a glaze slurry, replacing traditional printed glazes. This results in a glaze surface effect that more closely resembles the texture of natural stone after firing, exhibiting a multi-colored crystalline effect similar to marble. In this solution, the color dry granules are applied using a wet glaze slurry method, which offers higher production stability compared to traditional dry application. By first melting the color dry granules and flux dry granules, and then fusing them with protective dry granules, a crystal effect with excellent color development, vibrant colors, and transparency is achieved, further reproducing the texture of real stone.

[0017] Preferably, the softening temperature of the color granules is 1040–1070°C, the softening temperature of the flux granules is 930–950°C, and the softening temperature of the protective granules is 1030–1050°C. Because the flux granules have a lower softening temperature, the mixing of the color granules and flux granules allows the color granules to begin melting before the protective granules, resulting in color development and a transparent, multi-colored crystal effect without obscuring the original inkjet printing layer's pattern.

[0018] Preferably, the colored dry granules include at least two of blue dry granules, green dry granules, and black dry granules.

[0019] Preferably, the blue dry granules, by mass percentage, comprise the following components: SiO2 43.80–46.50%, Al2O3 14.02–15.52%, CaO 15.04–16.65%, MgO 6.00–8.00%, K2O 0.81–1.52%, Na2O 0.60–1.00%, BaO 4.86–5.97%, ZrO2 4.51–5.93%, P2O5 0.21–0.41%, with a loss on ignition of 0.40–0.60%.

[0020] The green dry granules, by mass percentage, comprise the following components: SiO2 53.49–56.39%, Al2O3 19.83–21.09%, CaO 12.93–14.54%, MgO 3.98–5.78%, K2O 1.03–2.52%, Na2O 0.98–2.17%, BaO 0.07–0.20%, ZrO2 0.09–0.24%, P2O5 0.16–0.38%, with a loss on ignition of 0.40–0.60%.

[0021] The black dry granules, by mass percentage, comprise the following components: SiO2 42.10–45.04%, Al2O3 12.40–14.96%, Fe2O3 4.42–5.46%, CaO 14.89–16.86%, MgO 5.41–7.85%, K2O 0.97–1.93%, Na2O 0.35–0.95%, BaO 4.86–5.97%, ZrO2 2.65–3.89%, P2O5 0.16–0.38%, MnO 2.69–3.57%, with a loss on ignition of 0.85–1.23%.

[0022] Preferably, the fluxing dry granules, by mass percentage, comprise the following components: SiO2 63.19–65.98%, Al2O3 13.54–15.87%, CaO 9.23–11.69%, MgO 3.98–5.26%, K2O 0.97–2.34%, Na2O 1.87–3.24%, with a loss on ignition of 0.21–0.51%.

[0023] The protective dry granules, by mass percentage, comprise the following components: SiO2 56.03–59.12%, Al2O3 6.01–7.98%, CaO 11.14–13.17%, MgO 0.14–0.39%, K2O 6.12–8.21%, Na2O 0.10–0.32%, BaO 1.99–3.05%, ZnO 10.13–12.01%, with a loss on ignition of 0.02–0.13%.

[0024] The protective glaze powder, by mass percentage, comprises the following components: SiO2 64.85–67.03%, Al2O3 9.51–11.07%, CaO 9.02–10.97%, MgO 1.02–2.09%, K2O 0.56–1.24%, Na2O 4.97–6.05%, BaO 0.64–1.23%, ZnO 0.98–1.58%, with a loss on ignition of 1.42–1.97%.

[0025] Preferably, the particle size range of the color dry granules is 60-120 mesh, the particle size range of the flux dry granules is 60-120 mesh, and the particle size range of the protective dry granules is 60-150 mesh.

[0026] Preferably, in step S1, the color dry granules comprise 90-110 parts by weight, and the fluxing dry granules comprise 10-25 parts by weight. By adjusting the ratio of color dry granules to fluxing dry granules, the melting equilibrium point among the three components (color dry granules, fluxing dry granules, and protective dry granules) is precisely controlled, avoiding unevenness on the tile surface caused by granule stacking. The resulting marble ceramic tile has high surface flatness, with unevenness controlled within 0.3mm and gloss difference controlled within 3°. This avoids the increased cost caused by extensive cutting and polishing after conventional dry-process material application.

[0027] Preferably, in step S2, the protective glaze powder comprises 90-110 parts by mass, water comprises 50-65 parts, methylcellulose comprises 0.2-0.4 parts, and sodium tripolyphosphate comprises 0.4-0.6 parts.

[0028] Preferably, in step S4, the amount of colored glaze applied is 55–120 g / m³. 2 .

[0029] Preferably, in step S5, the amount of protective dry granular fabric is 800-900 g / m². 2 .

[0030] Preferably, in step S6, the specific gravity of the protective glaze slurry is 1.18–1.25 g / mL, and the glaze application amount is 240–260 g / mL. 2 .

[0031] This invention also provides a preparation process for multi-colored crystal effect ceramic tiles, comprising the following steps:

[0032] S11. Mix the blue dry granules and the fluxing dry granules, add printing paste and printing oil to make a blue glaze paste for later use;

[0033] S12. Mix the green dry granules and the fluxing dry granules, add printing paste and printing oil to make a green glaze paste for later use;

[0034] S13. Mix the black dry granules and the fluxing dry granules, add printing paste and printing oil to make a black glaze paste for later use;

[0035] S2. Mix the protective glaze powder, water, methylcellulose, sodium tripolyphosphate and ceramic adhesive to make a protective glaze slurry for later use;

[0036] S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing.

[0037] S41. A layer of the blue glaze is screen-printed onto the surface of the blank according to a preset pattern texture;

[0038] S42. The green glaze paste is screen-printed onto the surface of the blank according to a preset pattern texture;

[0039] S43. The black glaze paste is screen-printed onto the surface of the blank according to a preset pattern texture;

[0040] S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied.

[0041] S6. Apply the protective glaze slurry prepared in step S2 to the surface of the blank obtained in step S5.

[0042] S7. The glazed body obtained in step S6 is fired to obtain the multicolored crystal effect ceramic tile.

[0043] By combining blue, green, and black dry granules, ceramic tiles that mimic cloisonné stone can be produced. The surface texture of the ceramic tile presents a translucent jade-like texture as a base, supplemented by large areas of blue crystals and transparent jade crystals, and further embellished with green and black crystals, forming a colorful and visually striking cloisonné ceramic tile.

[0044] In addition, the present invention also provides a multi-colored crystal effect ceramic tile, which is prepared using the above-mentioned multi-colored crystal effect ceramic tile preparation process.

[0045] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention uses wet glaze slurry to apply color dry particles. By first melting the color dry particles and fluxing dry particles and then fusing them with the protective dry particles, it can restore the crystallization effect of various colors in real stone and jade crystals. Moreover, compared with the traditional dry glaze application process, less material is used, the glaze surface is smoother, the gloss difference is lower, and the production stability is higher. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a panoramic view of the ceramic tile in Example 2;

[0048] Figure 2 , Figure 3 This is a partial view of the ceramic tile in Example 2.

[0049] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0051] This invention provides a process for preparing multi-colored crystal effect ceramic tiles, comprising the following steps:

[0052] S1. Mix at least two colors of dry granules with fluxing dry granules, then add 8-12 parts of printing paste and 45-55 parts of printing oil to prepare at least two colored glaze pastes for later use.

[0053] S2. Mix the protective glaze powder, water, methylcellulose, sodium tripolyphosphate and ceramic adhesive to make a protective glaze slurry for later use;

[0054] S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing.

[0055] S4. The various colored glazes obtained in step S1 are screen-printed onto the surface of the blank obtained in step S3 according to the preset pattern texture.

[0056] S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied.

[0057] S6. Apply the protective glaze slurry prepared in step S2 to the surface of the blank obtained in step S5.

[0058] S7. The glazed body obtained in step S6 is fired to obtain the multicolored crystal effect ceramic tile.

[0059] This invention, by employing the above steps, uses a wet glaze slurry process instead of a dry fabrication process to prepare dry-granule decorative ceramic tiles, resulting in high production stability and low production costs. The preparation method involves first mixing color dry granules and fluxing dry granules to form a glaze slurry, which is then melted during firing and subsequently fused with protective dry granules, thus creating a vibrant, translucent crystalline effect that realistically reproduces the colorful crystalline texture of natural stone.

[0060] In existing technologies, dry-granule decorative ceramic tiles typically employ a dry-laying process. This involves spreading positioning colored dry granules onto the ceramic body, which forms the base glaze layer and the printed pattern layer. After fixing with ceramic adhesive, a transparent glaze is applied, followed by firing and polishing to create ceramic tiles with a three-dimensional color and texture effect. However, to achieve a multi-colored crystalline effect, the colored dry granules must be cleverly integrated into the transparent dry granules to create a translucent crystalline effect. Therefore, in the dry-laying process, the colored dry granules and the transparent protective dry granules cannot fuse well, making it difficult to achieve the clear and bright colors characteristic of natural stone. Furthermore, the incomplete melting of the colored dry granules results in a piled-up state during firing, leading to poor glaze smoothness after firing and affecting the aesthetics of the finished product. To avoid unevenness caused by the piled-up dry granules, a large amount of protective dry granules is required afterward, necessitating polishing and cutting to obtain a smooth marble-like finish after firing, thus increasing costs.

[0061] This method uses a mixture of fluxing granules with lower initial melting points and coloring granules to create glazes of different colors. These glazes are then screen-printed layer by layer onto the ceramic body. Protective granules are applied during firing. During firing, the coloring and fluxing granules melt first, followed by the protective granules, thus encapsulating the coloring granules to create a transparent, multi-colored crystalline effect. By mixing different colored glazes and applying them layer by layer, the texture of natural stone can be imitated, resulting in clear, layered, and three-dimensional patterns on the fired ceramic tiles.

[0062] This solution involves adding ceramic adhesive to the protective glaze slurry. After the dry particles are protected, the protective glaze slurry is applied. On the one hand, it fills the gaps, and on the other hand, the protective glaze slurry protects and bonds the dry particles, helping to form a smooth glaze layer, while also providing wear resistance.

[0063] In some embodiments, the softening temperature of the color dry particles is 1040–1070°C, the softening temperature of the flux dry particles is 930–950°C, and the softening temperature of the protective dry particles is 1030–1050°C. By controlling the melting equilibrium point among the color dry particles, flux dry particles, and protective dry particles, a multi-colored crystalline effect with stronger three-dimensionality, more translucent clarity, and more vibrant colors can be effectively formed. Simultaneously, because the softening temperature of the color dry particles is slightly higher than that of the protective dry particles, pores can be sealed within the color dry particle layer and prevented from rising to the protective dry particle layer. Therefore, the polished glaze surface after firing can reduce the appearance of pores in the color dry particles.

[0064] In some implementations, the colored granules include at least two of blue granules, green granules, and black granules.

[0065] In an optional embodiment, the blue dry granules may include the following components by mass percentage: SiO2 43.80–46.50%, Al2O3 14.02–15.52%, CaO 15.04–16.65%, MgO 6.00–8.00%, K2O 0.81–1.52%, Na2O 0.60–1.00%, BaO 4.86–5.97%, ZrO2 4.51–5.93%, P2O5 0.21–0.41%, with a loss on ignition of 0.40–0.60%.

[0066] Green dry granules, by mass percentage, may include the following components: SiO2 53.49–56.39%, Al2O3 19.83–21.09%, CaO 12.93–14.54%, MgO 3.98–5.78%, K2O 1.03–2.52%, Na2O 0.98–2.17%, BaO 0.07–0.20%, ZrO2 0.09–0.24%, P2O5 0.16–0.38%, with a loss on ignition of 0.40–0.60%.

[0067] The black dry granules, by mass percentage, may include the following components: SiO2 42.10–45.04%, Al2O3 12.40–14.96%, Fe2O3 4.42–5.46%, CaO 14.89–16.86%, MgO 5.41–7.85%, K2O 0.97–1.93%, Na2O 0.35–0.95%, BaO 4.86–5.97%, ZrO2 2.65–3.89%, P2O5 0.16–0.38%, MnO 2.69–3.57%, with a loss on ignition of 0.85–1.23%.

[0068] In some preferred embodiments, the flux dry granules may include the following components by mass percentage: SiO2 63.19–65.98%, Al2O3 13.54–15.87%, CaO 9.23–11.69%, MgO 3.98–5.26%, K2O 0.97–2.34%, Na2O 1.87–3.24%, with a loss on ignition of 0.21–0.51%.

[0069] As an example, the protected dry granules, by mass percentage, comprise the following components: SiO2 56.03–59.12%, Al2O3 6.01–7.98%, CaO 11.14–13.17%, MgO 0.14–0.39%, K2O 6.12–8.21%, Na2O 0.10–0.32%, BaO 1.99–3.05%, ZnO 10.13–12.01%, with a loss on ignition of 0.02–0.13%.

[0070] The protective glaze powder, by mass percentage, comprises the following components: SiO2 64.85–67.03%, Al2O3 9.51–11.07%, CaO 9.02–10.97%, MgO 1.02–2.09%, K2O 0.56–1.24%, Na2O 4.97–6.05%, BaO 0.64–1.23%, ZnO 0.98–1.58%, with a loss on ignition of 1.42–1.97%.

[0071] In some embodiments, the particle size range of the coloring granules is 60–120 mesh, the particle size range of the fluxing granules is 60–120 mesh, and the particle size range of the protective granules is 60–150 mesh. Adjusting the particle size range of the granules can effectively prevent difficulties in venting the green body due to excessively small particles, reduce air bubbles in the glaze layer of the fired product, and, at the same time, a suitable particle size range allows the glaze to achieve better fluidity during high-temperature melting, resulting in a smoother glaze surface after firing.

[0072] Preferably, in step S1, the dry color granules comprise 90-110 parts by weight, and the dry flux granules comprise 10-25 parts by weight. By adjusting the ratio of the dry color granules to the dry flux granules, marble-like ceramic tiles with higher flatness can be obtained after firing, the unevenness of the glaze surface can be controlled within 0.3mm, and the gloss difference can be controlled within 3°.

[0073] Preferably, in step S2, the protective glaze powder comprises 90-110 parts by mass, water comprises 50-65 parts, methylcellulose comprises 0.2-0.4 parts, and sodium tripolyphosphate comprises 0.4-0.6 parts.

[0074] Preferably, in step S4, the amount of colored glaze applied is 55–120 g / m³. 2 Understandably, the amount of colored glaze applied is related to the number of colored glazes used in actual production and the desired pattern effect. When using two colored glazes for screen printing, the amount of glaze applied is relatively small; when using three colored glazes, the amount of glaze required is larger. Controlling the amount of glaze applied within a suitable range helps to ensure the uniformity and fluidity of the glaze, resulting in better color development and a smoother finish after firing.

[0075] Preferably, in step S5, the amount of dry granular fabric protected is 800–900 g / m². 2 By using an appropriate amount of colored glaze paste, combined with the amount of protective dry particles, an effective dry particle layer thickness of 0.2–0.4 mm can be formed. This minimizes the amount used while ensuring that the colored dry particles can still be well melted into the protective dry particles after polishing, resulting in a good crystal effect and ensuring the smoothness of the glaze surface.

[0076] Preferably, in step S6, the specific gravity is 1.18–1.25 g / mL, and the glaze application amount is 240–260 g / mL. 2 By controlling the protective glaze slurry within a suitable specific gravity range and glaze application amount, the dry color particles can be effectively protected, ensuring the uniformity of the glaze spray, thereby further improving the smoothness of the glaze surface and avoiding risks such as glaze defects or brick cracking.

[0077] Specifically, in step S7, the firing temperature is 1210–1230°C and the firing time is 65–70 min.

[0078] By way of example, the present invention also provides a preparation process for a multi-colored crystal effect ceramic tile, comprising the following steps:

[0079] S11. Mix 90-110 parts of blue dry granules and 15-25 parts of fluxing dry granules, add 8-12 parts of printing paste and 45-55 parts of printing oil to make a blue glaze paste for later use.

[0080] S12. Mix 90-110 parts of green dry granules and 10-20 parts of fluxing dry granules, add 8-12 parts of printing paste and 45-55 parts of printing oil to make green glaze paste for later use.

[0081] S13. Mix 90-110 parts of black dry granules and 15-25 parts of fluxing dry granules, add 8-12 parts of printing paste and 45-55 parts of printing oil to make a black glaze paste for later use.

[0082] S2. Mix 90-110 parts of protective glaze powder, 50-65 parts of water, 0.2-0.4 parts of methylcellulose, 0.4-0.6 parts of sodium tripolyphosphate, and ceramic adhesive to prepare a protective glaze slurry with a specific gravity of 1.18-1.25 g / mL for later use.

[0083] S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing.

[0084] S41. Apply a layer of blue glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern, with a glaze application rate of 45-55 g / m². 2 ;

[0085] S42. Apply a layer of green glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern, with a glaze application rate of 35-45 g / m². 2 ;

[0086] S43. Apply a layer of black glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern, with a glaze application rate of 10-20 g / m². 2 ;

[0087] S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied, with a granule application rate of 800-900 g / m². 2 ;

[0088] S6. Apply a protective glaze to the surface of the green body obtained in step S5, with a glaze application amount of 240-260 g / m². 2 ;

[0089] S7. The glazed body obtained in step S6 is fired at a temperature of 1210-1230℃ for 65-70 minutes to obtain the multicolored crystal effect ceramic tile.

[0090] In the above preparation method, blue dry granules, green dry granules and black dry granules are combined with each other. By selecting a specific ratio and glaze amount, marble tiles that imitate cloisonné stone can be prepared. The glaze texture presents a transparent jade texture as the base, supplemented by large areas of blue crystals and transparent jade crystals, and further embellished with green and black crystals, forming colorful and visually impactful imitation cloisonné ceramic tiles.

[0091] The following examples further illustrate the present invention in detail. It should also be understood that the following examples are only for further explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters in the following examples are merely one example within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below. Where specific conditions are not specified in the examples, conventional conditions or conditions recommended by the manufacturer shall be followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0092] In the following embodiments, the blue, green, and black dry granules used were all purchased from Foshan Linggao New Materials Co., Ltd.; the fluxing dry granules used were PY1408 transparent dry granules, purchased from Foshan Linggao New Materials Co., Ltd.; the protective dry granules were 609 protective dry granules, purchased from Guangdong Daoshi Technology Co., Ltd.; the protective glaze powder was PG01 glaze powder, purchased from Foshan Linggao New Materials Co., Ltd.; and the ceramic adhesive was DS1200 ceramic adhesive, purchased from Guangdong Daoshi Technology Co., Ltd.

[0093] The specific chemical composition of each raw material in the following examples is shown in the table below (mass percentage):

[0094]

[0095]

[0096] Note: If the chemical composition of the raw materials in the table above is less than 100%, it is mainly due to the presence of other undetected impurities.

[0097] The melting points of the raw materials in the following examples are provided in the table below (°C):

[0098]

[0099] Example 1

[0100] A preparation process for a multi-colored crystal effect ceramic tile includes the following steps:

[0101] S11. Mix 100 parts of blue dry granules and 20 parts of fluxing dry granules, add 10 parts of printing paste and 50 parts of printing oil to make a blue glaze paste for later use.

[0102] S12. Mix 100 parts of black dry granules and 15 parts of fluxing dry granules, add 10 parts of printing paste and 50 parts of printing oil to make a black glaze paste for later use.

[0103] S2. After thoroughly mixing 100 parts of protective glaze powder, 58 parts of water, 0.3 parts of methylcellulose and 0.5 parts of sodium tripolyphosphate, ball mill for 10 minutes, then add ceramic glue and mix to make a protective glaze slurry with a specific gravity of 1.20 g / mL, for later use.

[0104] S3. Apply a base glaze to the surface of a conventional ceramic body and then print a pattern using inkjet printing.

[0105] S41. Apply a layer of blue glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern. The glaze application amount is 50g / m². 2 ;

[0106] S42. Apply a layer of black glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern. The glaze application amount is 14g / m². 2 ;

[0107] S5. Apply protective dry granules to the surface of the body after applying the colored glaze slurry, with a granule application rate of 830g / m². 2 ;

[0108] S6. Apply a protective glaze slurry to the surface of the blank obtained in step S5, with a glaze application amount of 250g / m². 2 ;

[0109] S7. The glazed body obtained in step S6 is fired at a temperature of 1215℃ for 67 minutes to obtain the multicolored crystal effect ceramic tile.

[0110] Example 2

[0111] A preparation process for a multi-colored crystal effect ceramic tile includes the following steps:

[0112] S11. Mix 100 parts of blue dry granules and 20 parts of fluxing dry granules, add 10 parts of printing paste and 50 parts of printing oil to make a blue glaze paste for later use.

[0113] S12. Mix 100 parts of green dry granules and 15 parts of fluxing dry granules, add 10 parts of printing paste and 50 parts of printing oil to make green glaze paste for later use.

[0114] S13. Mix 100 parts of black dry granules and 20 parts of fluxing dry granules, add 10 parts of printing paste and 50 parts of printing oil to make a black glaze paste for later use.

[0115] S2. After thoroughly mixing 100 parts of protective glaze powder, 58 parts of water, 0.3 parts of methylcellulose and 0.5 parts of sodium tripolyphosphate, ball mill for 10 minutes, then add ceramic glue and mix to make a protective glaze slurry with a specific gravity of 1.20 g / mL, for later use.

[0116] S3. Apply a base glaze to the surface of a conventional ceramic body and then print a pattern using inkjet printing.

[0117] S41. Apply a layer of blue glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern. The glaze application amount is 50g / m². 2 ;

[0118] S42. Apply a layer of green glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern. The glaze application amount is 39g / m². 2 ;

[0119] S43. Apply a layer of black glaze paste to the surface of the body using a 40-mesh screen according to the pre-designed pattern. The glaze application amount is 14g / m². 2 ;

[0120] S5. Apply protective dry granules to the surface of the body after applying the colored glaze slurry, with a granule application rate of 830g / m². 2 ;

[0121] S6. Apply a protective glaze slurry to the surface of the blank obtained in step S5, with a glaze application amount of 250g / m². 2 ;

[0122] S7. The glazed body obtained in step S6 is fired at a temperature of 1215℃ for 67 minutes to obtain the multicolored crystal effect ceramic tile.

[0123] Comparative Example 1

[0124] This comparative example uses the same preparation process and parameters as Example 2, the difference being that no fluxing dry particles are added when preparing the colored glaze slurry.

[0125] Comparative Example 2

[0126] This comparative example uses the same preparation process and parameters as Example 2, the difference being the adjustment of the addition ratio of color dry granules and flux dry granules, as shown in the table below:

[0127]

[0128] The multicolored crystalline ceramic tiles prepared in Examples 1-2 and Comparative Examples 1-2 were subjected to performance tests. The glaze smoothness and gloss difference were examined, and the tiles were compared with natural stone. The appearance of the three-dimensional color texture pattern on the glaze was observed to determine the color and crystalline effect, classifying them as "poor," "average," and "good." Glaze smoothness was measured using a ceramic tile smoothness measuring instrument to determine the maximum unevenness of the glaze surface; the instrument reading represents the glaze smoothness of the tile. Gloss difference was measured using a ceramic gloss meter to determine the maximum and minimum gloss levels of the tile surface; the difference between these values ​​represents the gloss difference.

[0129] The test results are shown in Table 1.

[0130] Table 1 Test Results

[0131] Example 1 good 0.28 2.5 Example 2 good 0.29 2.8 Comparative Example 1 Poor 0.90 8.5 Comparative Example 2-1 Poor 0.85 8.0 Comparative Example 2-2 Poor 1.2 35

[0132] As shown in Table 1, in Comparative Example 1, the color dry granules were not blended with the flux dry granules and were directly applied to the surface of the body. The color dry granules did not fuse well with the protective dry granules, resulting in accumulation and an uneven glaze surface with poor smoothness and a large difference in gloss, thus affecting the appearance of the fired bricks. In Comparative Example 2-1, the addition ratio of green dry granules to flux dry granules was too low, resulting in poor melting of the green dry granules and a small amount of accumulation. This led to poor smoothness and a large difference in gloss after firing, resulting in a poor overall appearance. In Comparative Example 2-2, the addition of too much flux dry granules caused over-firing of the glaze, resulting in large pores on the glaze surface and a significant decrease in smoothness and gloss. Example 1, which used a blend of two color dry granules, produced ceramic bricks with a transparent and crystalline glaze surface, exhibiting blue and black crystalline effects, while also achieving high smoothness and a small difference in gloss. Example 2 used three colors of dry granules: blue, green, and black. Specific ratios and glaze amounts were selected, and the granules were screen-printed layer by layer onto the body according to a specific pattern, thus producing a product as shown in the example. Figure 1 The ceramic tiles shown are imitation cloisonné stone, from Figures 2-3 The partial image shows that the glaze has a delicate texture, presenting a base with a translucent jade-like texture, supplemented by a large area of ​​blue crystals and transparent jade crystals, and embellished with a few green and black crystals, forming a colorful and visually striking imitation cloisonné ceramic tile. At the same time, the glaze surface has a high degree of flatness after firing, with a glaze surface unevenness value of 0.29mm and a gloss difference of 2.8°.

[0133] In summary, this invention uses a wet glaze slurry process to replace the dry granule fabrication process for preparing dry granule decorative ceramic tiles. By mixing color dry granules and flux dry granules and then applying protective dry granules, it is possible to produce brightly colored, transparent, and crystal-clear multi-colored crystalline imitation stone textures. At the same time, it can ensure high glaze surface flatness, with an unevenness value of less than 0.3 mm and a gloss difference of less than 3°, thereby reducing production costs and improving production stability.

[0134] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A preparation process for a multi-colored crystal effect ceramic tile, characterized in that, Includes the following steps: S1. Mix at least two colors of dry granules with fluxing dry granules, then add printing paste and printing oil to prepare at least two colored glaze pastes for later use. By mass fractions, the coloring dry granules are 90-110 parts, and the fluxing dry granules are 10-25 parts; S2. Mix the protective glaze powder, water, methylcellulose, sodium tripolyphosphate and ceramic adhesive to make a protective glaze slurry for later use; S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing. S4. The various colored glazes obtained in step S1 are screen-printed onto the surface of the blank obtained in step S3 according to the preset pattern texture. S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied. S6. Apply the protective glaze slurry prepared in step S2 to the surface of the blank obtained in step S5. S7. The glazed body obtained in step S6 is fired to obtain the multicolored crystal effect ceramic tile. The softening temperature of the coloring dry granules is 1040–1070°C, the softening temperature of the fluxing dry granules is 930–950°C, and the softening temperature of the protective dry granules is 1030–1050°C.

2. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, The colored dry granules include at least two of blue dry granules, green dry granules, and black dry granules; The blue dry granules, by mass percentage, comprise the following components: SiO2 43.80–46.50%, Al2O3 14.02–15.52%, CaO 15.04–16.65%, MgO 6.00–8.00%, K2O 0.81–1.52%, Na2O 0.60–1.00%, BaO 4.86–5.97%, ZrO2 4.51–5.93%, P2O5 0.21–0.41%, with a loss on ignition of 0.40–0.60%. The green dry granules, by mass percentage, comprise the following components: SiO2 53.49–56.39%, Al2O3 19.83–21.09%, CaO 12.93–14.54%, MgO 3.98–5.78%, K2O 1.03–2.52%, Na2O 0.98–2.17%, BaO 0.07–0.20%, ZrO2 0.09–0.24%, P2O5 0.16–0.38%, with a loss on ignition of 0.40–0.60%. The black dry granules, by mass percentage, comprise the following components: SiO2 42.10–45.04%, Al2O3 12.40–14.96%, Fe2O3 4.42–5.46%, CaO 14.89–16.86%, MgO 5.41–7.85%, K2O 0.97–1.93%, Na2O 0.35–0.95%, BaO 4.86–5.97%, ZrO2 2.65–3.89%, P2O5 0.16–0.38%, MnO 2.69–3.57%, with a loss on ignition of 0.85–1.23%.

3. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, The fluxing dry granules, by mass percentage, comprise the following components: SiO2 63.19–65.98%, Al2O3 13.54–15.87%, CaO 9.23–11.69%, MgO 3.98–5.26%, K2O 0.97–2.34%, Na2O 1.87–3.24%, with a loss on ignition of 0.21–0.51%. The protective dry granules, by mass percentage, comprise the following components: SiO2 56.03–59.12%, Al2O3 6.01–7.98%, CaO 11.14–13.17%, MgO 0.14–0.39%, K2O 6.12–8.21%, Na2O 0.10–0.32%, BaO 1.99–3.05%, ZnO 10.13–12.01%, with a loss on ignition of 0.02–0.13%. The protective glaze powder comprises the following components by mass percentage: SiO2 64.85–67.03%, Al2O3 9.51–11.07%, CaO 9.02–10.97%, MgO 1.02–2.09%, K2O 0.56–1.24%, Na2O 4.97–6.05%, BaO 0.64–1.23%, ZnO 0.98–1.58%, with a loss on ignition of 1.42–1.97%.

4. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, The particle size range of the color dry granules is 60-120 mesh, the particle size range of the fluxing dry granules is 60-120 mesh, and the particle size range of the protective dry granules is 60-150 mesh.

5. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, In step S1, by mass fraction, the color dry granules are 90-110 parts and the fluxing dry granules are 10-25 parts. In step S2, by mass fraction, the protective glaze powder comprises 90-110 parts, water 50-65 parts, methylcellulose 0.2-0.4 parts, and sodium tripolyphosphate 0.4-0.6 parts.

6. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, In step S4, the amount of colored glaze applied is 55–120 g / m³. 2 .

7. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 1, characterized in that, In step S5, the amount of protective dry granular fabric is 800–900 g / m². 2 ; In step S6, the specific gravity of the protective glaze slurry is 1.18–1.25 g / mL, and the glaze application amount is 240–260 g / mL. 2 .

8. The preparation process of a multi-colored crystal effect ceramic tile as described in claim 2, characterized in that, Includes the following steps: S11. Mix the blue dry granules and the fluxing dry granules, add printing paste and printing oil to make a blue glaze paste for later use; S12. Mix the green dry granules and the fluxing dry granules, add printing paste and printing oil to make a green glaze paste for later use; S13. Mix the black dry granules and the fluxing dry granules, add printing paste and printing oil to make a black glaze paste for later use; S2. Mix the protective glaze powder, water, methylcellulose, sodium tripolyphosphate and ceramic adhesive to make a protective glaze slurry for later use; S3. Apply a base glaze to the surface of the blank and then print a pattern using inkjet printing. S41. A layer of the blue glaze is screen-printed onto the surface of the blank according to a preset pattern texture; S42. The green glaze paste is screen-printed onto the surface of the blank according to a preset pattern texture; S43. The black glaze paste is screen-printed onto the surface of the blank according to a preset pattern texture; S5. Apply protective dry granules to the surface of the body after the colored glaze slurry has been applied. S6. Apply the protective glaze slurry prepared in step S2 to the surface of the blank obtained in step S5. S7. The glazed body obtained in step S6 is fired to obtain the multicolored crystal effect ceramic tile.

9. A multi-colored crystal effect ceramic tile, characterized in that, The ceramic tile with multi-colored crystal effect is prepared by the preparation process described in any one of claims 1 to 8.

Images