Ceramic tile having iridescent structural color and method of making the same

Abstract

This invention relates to the technical field of ceramic tiles, and in particular to a ceramic tile with an iridescent structural color and its preparation method. This application discloses a ceramic tile with an iridescent structural color, comprising a body, a surface glaze layer on the body, a pattern layer on the surface glaze layer, a crystalline glaze layer on the pattern layer, and a protective layer on the crystalline glaze layer. The crystalline glaze layer comprises the following raw materials in parts by weight: feldspar 30-50 parts, quartz 5-20 parts, dolomite 5-15 parts, talc 5-10 parts, kaolin 1-5 parts, niobium pentoxide 2-7 parts, zirconium silicate 3-5 parts, yttrium oxide 1-3 parts, cerium oxide 1-3 parts, and scandium oxide 0.5-2 parts. The ceramic tile of this application, through the addition of various rare earth elements, forms a staggered, interlocking feather-like microstructure in the dry particles of the crystalline glaze layer, biomimetically mimicking the microscopic morphology similar to natural kingfisher feathers, exhibiting the special visual effect of an iridescent structural color.

Description

Technical Field

[0001] This invention relates to the technical field of ceramic tiles, and in particular to a ceramic tile with an iridescent structural color and its preparation method. Background Technology

[0002] Crystalline glaze refers to a type of glaze in which one or more crystallizing agents are introduced into a basic ceramic glaze, causing it to become supersaturated during the melting process and precipitate during cooling, thus forming crystalline patterns. Crystalline glaze is an artificial crystalline glaze developed from ancient Chinese colored glazes. Ancient people utilized the crystallization properties of inorganic compounds to prepare the world-renowned microcrystalline iron-based crystalline glaze: Tenmoku glaze. Tea dust glaze, hare's fur glaze, oil spot glaze, and Tenmoku glaze from the Song Dynasty in my country were all precious varieties of crystalline glaze.

[0003] The composition of crystalline glaze mainly includes three parts: crystallizing agent, base glaze, and colorant.

[0004] Among the base glazes, the concentration of silica and other crystalline substances has the greatest impact, namely the level of supersaturation. It is a key factor affecting the composition of crystalline glazes. If the supersaturation is low, crystals are difficult to grow; if the supersaturation is too high, crystal nuclei accumulate, resulting in small crystal flowers or coarse crystallization.

[0005] Crystallizing agents are mainly used to adjust the firing temperature, viscosity and thermal expansion coefficient of crystalline glazes. The content of alkali metal oxides should not be too high, otherwise it will weaken the crystallization effect, while alkaline earth metal oxides will promote crystallization.

[0006] Besides the crystalline components, the main function of colorants is to impart specific hues to the glaze and crystal patterns. They are generally used in small quantities and have a minimal impact. Rare earth elements have the effect of inducing structural colors in different crystalline glazes. For example, CeO2 produces blue crystal patterns in zinc silicoite crystalline glazes, while in pyroxene crystalline glazes, the crystal patterns appear pink.

[0007] However, the application and development of crystalline glazes in the ceramic building industry is still relatively limited. This is mainly because the complex process conditions and numerous defects in the finished glaze surface of traditional crystalline glazes restrict their commercial production.

[0008] Therefore, this application provides a ceramic tile with an iridescent structural color and a method for preparing the same. Summary of the Invention

[0009] This application provides a ceramic tile with iridescent structural color and its preparation method. The ceramic tile incorporates various rare earth elements such as niobium pentoxide, zirconium silicate, yttrium oxide, cerium oxide, and scandium oxide. The dry particles of the mixed material in the crystalline glaze layer form a staggered and interlocking feather-like microstructure at the microscopic level, which biomimetically simulates the microscopic morphology similar to natural kingfisher feathers and exhibits the special visual effect of iridescent structural color.

[0010] The technical solution adopted by this application to solve its technical problem is:

[0011] The primary objective of this application is to provide a ceramic tile with an iridescent structural color, comprising a body, a surface glaze layer disposed on the body, a pattern layer disposed on the surface glaze layer, a crystalline glaze layer disposed on the pattern layer, and a protective layer disposed on the crystalline glaze layer.

[0012] The crystalline glaze layer comprises the following raw materials in parts by weight:

[0013] Feldspar 30-50 parts, quartz 5-20 parts, dolomite 5-15 parts, talc 5-10 parts, kaolin 1-5 parts, niobium pentoxide 2-7 parts, zirconium silicate 3-5 parts, yttrium oxide 1-3 parts, cerium oxide 1-3 parts, scandium oxide 0.5-2 parts.

[0014] The preparation process of the mixture of the crystalline glaze layer includes the following steps:

[0015] Weigh out the corresponding raw materials according to the weight composition of the raw materials for the crystalline glaze layer;

[0016] Mix all the raw materials and put them into a high-temperature melting furnace. After the materials are added, raise the temperature to 1580℃ and hold for 5 hours. After the holding period, quench the molten liquid with water and cool it to room temperature to form a crystalline glaze layer.

[0017] In some embodiments, the protective layer comprises the following raw materials in parts by weight:

[0018] 34-40 parts of albite, 3.5-7.5 parts of kaolin, 3-6 parts of alumina, 18.5-22.5 parts of calcite, 0.5-1.5 parts of dolomite, 2.5-4.5 parts of zinc oxide, and 6-10 parts of zircon powder.

[0019] The preparation process of the mixture for the protective layer includes the following steps:

[0020] Weigh the corresponding raw materials according to the weight composition of the raw materials for the protective layer; mix the raw materials to obtain a preliminary mixture; calcine and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry; quench the dry granule slurry in water and cool it to room temperature; and then crush it through a 60-120 mesh sieve to obtain the mixture for the protective layer.

[0021] In some embodiments, the thickness of the crystalline glaze layer is 0.5-2 mm.

[0022] In some embodiments, the thickness of the protective layer is 0.5-2 mm.

[0023] A second objective of this application is to provide a method for preparing the aforementioned ceramic tile, comprising the following steps:

[0024] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0025] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0026] S3. Preparation of the mixture for the crystalline glaze layer;

[0027] S4. Prepare the mixture for the protective layer;

[0028] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by screen dry method, and then apply the mixture of protective layer to the crystalline glaze layer.

[0029] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0030] In some embodiments, in step S5, the mesh count of the wire mesh in the dry wire mesh process is 40 mesh.

[0031] In some embodiments, the firing temperature in step S6 is 1130-1160°C.

[0032] The beneficial effects of this application are:

[0033] 1. The preparation method described in this application uses a dry screen fabrication method to precisely position dry particles with different refractive ratios on the surface of the plate, thereby forming a decorative effect with iridescent structural colors in a localized area of ​​the ceramic glaze layer.

[0034] 2. The ceramic tile described in this application, through the addition of various rare earth elements such as niobium pentoxide, zirconium silicate, yttrium oxide, cerium oxide and scandium oxide, forms a feather-like microstructure in the mixed dry particles of the crystalline glaze layer, which is staggered and interlocked at the micro level. This biomimetically simulates the microscopic morphology similar to that of natural kingfisher feathers, and exhibits a special visual effect of iridescent structural color. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Figure 1 This is a process flow diagram of the preparation method of a ceramic tile with an iridescent structural color as described in this application.

[0037] Figure 2 This is a product appearance diagram of a ceramic tile with an iridescent structural color according to Embodiment 1 of this application. Detailed Implementation

[0038] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0039] As used herein, “and / or” includes all combinations of any and one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a,” “an,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. Further understanding is needed; when used in this specification, “comprising” designates the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0040] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Further understanding is that terms, such as those defined in common dictionaries, are interpreted in accordance with their meaning in the context of the relevant field and are not idealized or overly formal, unless expressly defined herein.

[0041] The exemplary invention described herein may suitably omit any one or more limiting elements, which are not specifically disclosed herein. Therefore, terms such as “comprising,” “including,” “containing,” etc., should be interpreted broadly and non-limitingly. Furthermore, the terminology used herein is for descriptive purposes without limitation, and it is unintentional to use terms that do not include any equivalent characteristics, but only to describe a portion of their characteristics; however, various modifications are possible within the scope of the invention according to the claims. Therefore, while the invention has been specifically disclosed through preferred embodiments and optional features, variations of the invention embodied by the modifications disclosed herein may be noted by those skilled in the art, and such modifications and variations are considered to be within the scope of the invention.

[0042] Terminology Explanation:

[0043] The ceramic body, as the main structure of a ceramic tile, is the foundation of tile manufacturing. It is a semi-finished product with a certain strength and shape, made from ceramic raw materials through processes such as shaping, drying, and firing. The main function of the ceramic body is to support the overall structure of the tile, withstand external pressure and loads, and provide a stable base for subsequent glaze layers, pattern layers, and crystalline glaze layers. The ceramic body can be made using conventional, existing processes.

[0044] The glaze layer, as a decorative layer on the surface of the tile, mainly serves to beautify the tile and enhance its texture. Covering the surface of the tile body, it not only protects the body from external erosion but also allows the tile to present a rich variety of appearance effects through different colors and texture designs. In this application, the glaze layer can be made using conventional and existing processes.

[0045] A ceramic tile with an iridescent structural color includes a body, a surface glaze layer on the body, a pattern layer on the surface glaze layer, a crystalline glaze layer on the pattern layer, and a protective layer on the crystalline glaze layer.

[0046] The crystalline glaze layer comprises the following raw materials in parts by weight:

[0047] Feldspar 30-50 parts, quartz 5-20 parts, dolomite 5-15 parts, talc 5-10 parts, kaolin 1-5 parts, niobium pentoxide 2-7 parts, zirconium silicate 3-5 parts, yttrium oxide 1-3 parts, cerium oxide 1-3 parts, scandium oxide 0.5-2 parts.

[0048] Specifically, in crystalline glazes, niobium pentoxide is a key component. By forming an [NbO6] octahedral structure, it acts as the outer body in the network, connecting with oxygen atoms in a non-bridging oxygen manner, effectively reducing the high-temperature viscosity of the glaze melt. This change in property promotes the growth of phase-separated droplets in the glaze, thereby affecting the generation mechanism of structural colors within the glaze layer, resulting in richer and more diverse colors.

[0049] Understandably, the addition of Nb₂O₅ provides the basic conditions for the formation of structural colors by altering the high-temperature fluidity and phase separation behavior of the glaze. Simultaneously, the octahedral structure of [NbO] optimizes the scattering of light within the glaze layer, thus producing a more pronounced iridescent effect.

[0050] Specifically, in crystalline glazes, zirconium silicate typically exists as a reinforcing agent and stabilizer. It not only improves the hardness and wear resistance of the glaze layer but also optimizes the crystalline structure and distribution through synergistic effects with other rare earth elements, further enhancing the artistic effect and physical properties of the glaze layer.

[0051] Understandably, the addition of zirconium silicate makes it easier for the glaze to form stable and fine grains during firing. These grains provide unique optical properties to the glaze through light scattering and interference. At the same time, the interaction between zirconium silicate and other rare earth elements also promotes the formation of more complex crystal structures, improving the overall quality of the glaze.

[0052] Specifically, in crystalline glazes, yttrium oxide is primarily used as a crystallization promoter. It effectively lowers the formation temperature of certain crystalline phases, promotes the crystallization process, and improves the purity and crystallinity of the crystals. This allows the glaze to achieve good crystallization at lower firing temperatures, reducing energy consumption and increasing production efficiency.

[0053] Understandably, the ionic radius of Y₂O₃ is similar to that of other metal cations in the glaze, allowing it to easily enter the lattice sites within the glaze and form stable solid solutions or composite crystals with other components. This structural optimization facilitates crystal formation and growth, thereby improving the crystallization effect and performance of the glaze layer.

[0054] Specifically, in crystalline glazes, cerium oxide plays a significant role in color enhancement and toning. It can alter the optical properties of certain crystalline phases in the glaze layer through its interaction with other metal cations, thereby producing different color effects. Furthermore, CeO2 can enhance the weather resistance and UV resistance of the glaze layer, making ceramic tiles more durable.

[0055] Understandably, the valence state changes of CeO2 and its chemical reactions with other components in the glaze are the main reasons for its color-enhancing and color-matching effects. In different crystal structures, the valence state of CeO2 can change, thus affecting the light absorption and reflection properties of the crystal. Simultaneously, the interaction between CeO2 and other metal cations in the glaze also promotes the formation of more complex crystal structures, resulting in richer and more varied colors in the glaze layer.

[0056] Specifically, in crystalline glazes, scandium oxide primarily functions to increase crystallinity and grain size. It optimizes crystal growth conditions, promotes the formation of large crystals, and increases the density and hardness of the glaze layer. This results in ceramic tiles possessing not only a more aesthetically pleasing appearance but also higher physical strength and wear resistance.

[0057] Understandably, the addition of Sc2O3 lowers the nucleation energy barrier of the glaze, promoting crystal formation and growth. Simultaneously, it can synergistically interact with other rare earth elements to further optimize the crystal growth environment and structure. These optimized crystal growth conditions allow the glaze to form a more complete and dense crystal structure during firing, thereby improving the overall performance of the glaze.

[0058] Therefore, by adding various rare earth elements such as niobium pentoxide, zirconium silicate, yttrium oxide, cerium oxide, and scandium oxide, the dry particles of the mixed material in the crystalline glaze layer form a staggered and interlocking feather-like microstructure at the micro level, which biomimetically simulates the microscopic morphology similar to natural kingfisher feathers and exhibits the special visual effect of iridescent structural color.

[0059] In some embodiments, the preparation process of the mixture of the crystalline glaze layer includes the following steps:

[0060] Weigh out the corresponding raw materials according to the weight composition of the raw materials for the crystalline glaze layer;

[0061] Mix all the raw materials and put them into a high-temperature melting furnace. After the materials are added, raise the temperature to 1580℃ and hold for 5 hours. After the holding period, quench the molten liquid with water and cool it to room temperature to form a crystalline glaze layer.

[0062] Specifically, the various raw materials are mixed and placed into a high-temperature melting furnace for silicon molybdenum rods. Multiple feedings are used to prevent overflow due to the volume expansion of the batch during melting. The batch is added at 1450℃, and after feeding, the temperature is raised to 1580℃ and held for 5 hours, with two stirring cycles to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0063] In some embodiments, the protective layer comprises the following raw materials in parts by weight:

[0064] 34-40 parts of albite, 3.5-7.5 parts of kaolin, 3-6 parts of alumina, 18.5-22.5 parts of calcite, 0.5-1.5 parts of dolomite, 2.5-4.5 parts of zinc oxide, and 6-10 parts of zircon powder.

[0065] Specifically, in protective glazes, zircon powder is mainly used as a reinforcing agent and an opacifier. Zircon powder can improve the hardness and wear resistance of the glaze layer, making the surface of ceramic tiles more scratch-resistant and corrosion-resistant. At the same time, the opacifying effect of zircon powder can also cover up defects and color differences in the glaze layer, making the surface of ceramic tiles smoother and more aesthetically pleasing.

[0066] In some embodiments, the preparation process of the mixture for the protective layer includes the following steps:

[0067] Weigh the corresponding raw materials according to the weight composition of the raw materials for the protective layer; mix the raw materials to obtain a preliminary mixture; calcine and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry; quench the dry granule slurry in water and cool it to room temperature; and then crush it through a 60-120 mesh sieve to obtain the mixture for the protective layer.

[0068] In some embodiments, the thickness of the crystalline glaze layer is 0.5-2 mm.

[0069] In some embodiments, the thickness of the protective layer is 0.5-2 mm.

[0070] Secondly, this application provides a method for preparing the aforementioned ceramic tile, comprising the following steps:

[0071] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0072] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0073] S3. Preparation of the mixture for the crystalline glaze layer;

[0074] S4. Prepare the mixture for the protective layer;

[0075] S5. On the surface of the pattern layer, using a screen printing machine, 60-130 mesh crystalline glaze dry granules are scraped onto the surface of the blank in S2 using a 40 mesh patterned screen. Depending on the pattern effect, the amount of dry granules per square meter is between 20-50g. Then, the mixture of the crystalline glaze layer obtained in step S3 is applied to the surface using a dry granule spreading machine. The amount of spreading material is 730-780g per square meter.

[0076] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0077] In some embodiments, in step S5, the mesh count of the wire mesh in the dry wire mesh process is 40 mesh.

[0078] In some embodiments, the firing temperature in step S6 is 1130-1160°C.

[0079] Example 1

[0080] A method for preparing a ceramic tile with iridescent structural colors includes the following steps:

[0081] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0082] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0083] S3. Preparation of the mixture for the crystalline glaze layer;

[0084] According to the weight composition of the raw materials for the crystalline glaze layer, weigh out the following: 30 parts feldspar, 5 parts quartz, 5 parts dolomite, 5 parts talc, 1 part kaolin, 2 parts niobium pentoxide, 3 parts zirconium silicate, 1 part yttrium oxide, 1 part cerium oxide, and 0.5 parts scandium oxide.

[0085] The raw materials are mixed and placed in a high-temperature melting furnace for silicon molybdenum rods. Multiple additions are used to prevent overflow due to volume expansion during melting. The materials are added at 1450℃, and after addition, the temperature is raised to 1580℃ and held for 5 hours. Stirring is performed twice to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0086] S4. Prepare the mixture for the protective layer;

[0087] According to the weight composition of the raw materials for the protective layer, weigh out the following: 34 parts albite, 3.5 parts kaolin, 3 parts alumina, 18.5 parts calcite, 0.5 parts dolomite, 2.5 parts zinc oxide, and 6 parts zircon powder. Mix the raw materials to obtain a preliminary mixture. Calcinate and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry. Quench the dry granule slurry with water and cool it to room temperature. After pulverizing through a 60-120 mesh sieve, obtain the mixture for the protective layer.

[0088] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by dry application through a 40-mesh screen, and then apply the mixture of protective layer to the crystalline glaze layer.

[0089] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0090] Example 2

[0091] A method for preparing a ceramic tile with iridescent structural colors includes the following steps:

[0092] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0093] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0094] S3. Preparation of the mixture for the crystalline glaze layer;

[0095] According to the weight composition of the raw materials for the crystalline glaze layer, weigh out the following: 50 parts feldspar, 20 parts quartz, 15 parts dolomite, 10 parts talc, 5 parts kaolin, 7 parts niobium pentoxide, 5 parts zirconium silicate, 3 parts yttrium oxide, 3 parts cerium oxide, and 2 parts scandium oxide.

[0096] The raw materials are mixed and placed in a high-temperature melting furnace for silicon molybdenum rods. Multiple additions are used to prevent overflow due to volume expansion during melting. The materials are added at 1450℃, and after addition, the temperature is raised to 1580℃ and held for 5 hours. Stirring is performed twice to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0097] S4. Prepare the mixture for the protective layer;

[0098] According to the weight composition of the raw materials for the protective layer, weigh out the following: 40 parts albite, 7.5 parts kaolin, 6 parts alumina, 22.5 parts calcite, 1.5 parts dolomite, 4.5 parts zinc oxide, and 10 parts zircon powder. Mix the raw materials to obtain a preliminary mixture. Calcinate and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry. Quench the dry granule slurry with water and cool it to room temperature. After pulverizing through a 60-120 mesh sieve, obtain the mixture for the protective layer.

[0099] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by dry application through a 40-mesh screen, and then apply the mixture of protective layer to the crystalline glaze layer.

[0100] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0101] Example 3

[0102] A method for preparing a ceramic tile with iridescent structural colors includes the following steps:

[0103] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0104] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0105] S3. Preparation of the mixture for the crystalline glaze layer;

[0106] According to the weight composition of the raw materials for the crystalline glaze layer, weigh out the following: 40 parts feldspar, 15 parts quartz, 10 parts dolomite, 8 parts talc, 3 parts kaolin, 4 parts niobium pentoxide, 4 parts zirconium silicate, 2 parts yttrium oxide, 2 parts cerium oxide, and 1 part scandium oxide.

[0107] The raw materials are mixed and placed in a high-temperature melting furnace for silicon molybdenum rods. Multiple additions are used to prevent overflow due to volume expansion during melting. The materials are added at 1450℃, and after addition, the temperature is raised to 1580℃ and held for 5 hours. Stirring is performed twice to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0108] S4. Prepare the mixture for the protective layer;

[0109] According to the weight composition of the raw materials for the protective layer, weigh out the following raw materials: 38 parts of albite, 5 parts of kaolin, 4 parts of alumina, 20 parts of calcite, 1 part of dolomite, 3 parts of zinc oxide, and 8 parts of zircon powder. Mix the raw materials to obtain a preliminary mixture. Calcinate and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry. Quench the dry granule slurry with water and cool it to room temperature. After crushing through a 60-120 mesh sieve, obtain the mixture for the protective layer.

[0110] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by dry application through a 40-mesh screen, and then apply the mixture of protective layer to the crystalline glaze layer.

[0111] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0112] Example 4

[0113] A method for preparing a ceramic tile with iridescent structural colors includes the following steps:

[0114] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0115] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0116] S3. Preparation of the mixture for the crystalline glaze layer;

[0117] According to the weight composition of the raw materials for the crystalline glaze layer, weigh out the following: 30 parts feldspar, 20 parts quartz, 5 parts dolomite, 10 parts talc, 1 part kaolin, 7 parts niobium pentoxide, 3 parts zirconium silicate, 1 part yttrium oxide, 3 parts cerium oxide, and 0.5 parts scandium oxide.

[0118] The raw materials are mixed and placed in a high-temperature melting furnace for silicon molybdenum rods. Multiple additions are used to prevent overflow due to volume expansion during melting. The materials are added at 1450℃, and after addition, the temperature is raised to 1580℃ and held for 5 hours. Stirring is performed twice to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0119] S4. Prepare the mixture for the protective layer;

[0120] According to the weight composition of the raw materials for the protective layer, weigh out the following: 34 parts albite, 3.5 parts kaolin, 3 parts alumina, 22.5 parts calcite, 0.5 parts dolomite, 4.5 parts zinc oxide, and 6 parts zircon powder. Mix the raw materials to obtain a preliminary mixture. Calcinate and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry. Quench the dry granule slurry with water and cool it to room temperature. After pulverizing through a 60-120 mesh sieve, obtain the mixture for the protective layer.

[0121] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by dry application through a 40-mesh screen, and then apply the mixture of protective layer to the crystalline glaze layer.

[0122] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0123] Example 5

[0124] A method for preparing a ceramic tile with iridescent structural colors includes the following steps:

[0125] S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer;

[0126] S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer;

[0127] S3. Preparation of the mixture for the crystalline glaze layer;

[0128] According to the weight composition of the raw materials for the crystalline glaze layer, weigh out the following: 35 parts feldspar, 8 parts quartz, 7 parts dolomite, 6 parts talc, 2 parts kaolin, 3 parts niobium pentoxide, 3 parts zirconium silicate, 3 parts yttrium oxide, 1 part cerium oxide, and 1 part scandium oxide.

[0129] The raw materials are mixed and placed in a high-temperature melting furnace for silicon molybdenum rods. Multiple additions are used to prevent overflow due to volume expansion during melting. The materials are added at 1450℃, and after addition, the temperature is raised to 1580℃ and held for 5 hours. Stirring is performed twice to promote homogenization and eliminate air bubbles. The molten liquid is then placed in a water-quenching basin and cooled to room temperature to form the desired dry granules. These granules are then crushed and passed through a 60-120 mesh sieve to obtain the mixture for the crystalline glaze layer.

[0130] S4. Prepare the mixture for the protective layer;

[0131] According to the weight composition of the raw materials for the protective layer, weigh out the following: 34 parts albite, 4 parts kaolin, 4 parts alumina, 19 parts calcite, 0.6 parts dolomite, 3 parts zinc oxide, and 7 parts zircon powder. Mix the raw materials to obtain a preliminary mixture. Calcinate and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry. Quench the dry granule slurry with water and cool it to room temperature. After pulverizing through a 60-120 mesh sieve, obtain the mixture for the protective layer.

[0132] S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by dry application through a 40-mesh screen, and then apply the mixture of protective layer to the crystalline glaze layer.

[0133] S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

[0134] Comparative Example 1

[0135] A method for preparing a ceramic tile includes the following steps:

[0136] In step S3, niobium pentoxide, zirconium silicate, yttrium oxide, cerium oxide, and scandium oxide are not added to the mixture used to prepare the crystalline glaze layer.

[0137] The remaining conditions are the same as in Example 1.

[0138] Comparative Example 2

[0139] A method for preparing a ceramic tile includes the following steps:

[0140] The mixture for preparing the protective layer is not performed in step S4; and the mixture for the crystalline glaze layer prepared in step S3 is applied to the surface of the pattern layer by a 40-mesh screen dry method in step S5; and the green body with the mixture for which the crystalline glaze layer is applied is fired and polished in step S6 to obtain a ceramic tile with iridescent structural color.

[0141] The remaining conditions are the same as in Example 1.

[0142] In step S3, niobium pentoxide, zirconium silicate, yttrium oxide, cerium oxide, and scandium oxide are not added to the mixture used to prepare the crystalline glaze layer.

[0143] The remaining conditions are the same as in Example 1.

[0144] Comparative Example 3

[0145] A method for preparing a ceramic tile includes the following steps:

[0146] In step S4, when preparing the protective layer mixture, no zircon powder is added;

[0147] The remaining conditions are the same as in Example 1.

[0148] The ceramic tiles prepared in Examples 1-5 and Comparative Examples 1-3 were subjected to the following performance tests, and the test results are summarized in Table 1:

[0149] (1) Abrasion resistance was tested according to the test method of GB / T3810.7-2016.

[0150] (2) Vickers hardness, tested using a Vickers hardness tester;

[0151] Example 1 Level 3, 1500 RPM 7.5 Example 2 Level 3, 1500 RPM 7.5 Example 3 Level 3, 1500 RPM 7 Example 4 Level 3, 1500 RPM 7 Example 5 Level 3, 1500 RPM 7.4 Comparative Example 1 Level 3 750 RPM 7 Comparative Example 2 Level 2 600 RPM 5 Comparative Example 3 Level 3 750 RPM 6

[0152] The raw materials or reagents used in the embodiments and comparative examples of this invention were all purchased from mainstream manufacturers on the market. Those without specified manufacturers or concentrations were all analytical grade raw materials or reagents that could be obtained in a conventional manner. As long as they could achieve the expected effect, there were no special restrictions.

[0153] The instruments and equipment used in this embodiment were all purchased from major manufacturers on the market. As long as they achieve the expected function, there are no particular limitations. Where specific techniques or conditions are not specified in this embodiment, they shall be performed in accordance with the techniques or conditions described in the literature in this field or according to the product manual. The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A ceramic tile with an iridescent structural color, comprising a body, wherein a glaze layer is disposed on the body, and a pattern layer is disposed on the glaze layer, characterized in that, A crystalline glaze layer is provided on the pattern, and a protective layer is provided on the crystalline glaze layer; The crystalline glaze layer comprises the following raw materials in parts by weight: Feldspar 30-50 parts, quartz 5-20 parts, dolomite 5-15 parts, talc 5-10 parts, kaolin 1-5 parts, niobium pentoxide 2-7 parts, zirconium silicate 3-5 parts, yttrium oxide 1-3 parts, cerium oxide 1-3 parts, scandium oxide 0.5-2 parts; The method for preparing the ceramic tile includes the following steps: S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer; S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer; S3. Preparation of the mixture for the crystalline glaze layer; S4. Prepare the mixture for the protective layer; S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by screen dry method, and then apply the mixture of protective layer to the crystalline glaze layer. S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color; The preparation process of the mixture of the crystalline glaze layer includes the following steps: Weigh out the corresponding raw materials according to the weight composition of the raw materials for the crystalline glaze layer; Mix all the raw materials and put them into a high-temperature melting furnace. After the materials are added, raise the temperature to 1580℃ and hold for 5 hours. After the holding period, quench the molten liquid with water and cool it to room temperature to form a crystalline glaze layer.

2. The ceramic tile according to claim 1, characterized in that, The protective layer comprises the following raw materials in parts by weight: 34-40 parts of albite, 3.5-7.5 parts of kaolin, 3-6 parts of alumina, 18.5-22.5 parts of calcite, 0.5-1.5 parts of dolomite, 2.5-4.5 parts of zinc oxide, and 6-10 parts of zircon powder.

3. The ceramic tile according to claim 1, characterized in that, The crystalline glaze layer comprises the following raw materials in parts by weight: Feldspar 40 parts, quartz 15 parts, dolomite 10 parts, talc 8 parts, kaolin 3 parts, niobium pentoxide 4 parts, zirconium silicate 4 parts, yttrium oxide 2 parts, cerium oxide 2 parts, scandium oxide 1 part.

4. The ceramic tile according to claim 1, characterized in that, The preparation process of the mixture for the protective layer includes the following steps: Weigh the corresponding raw materials according to the weight composition of the raw materials for the protective layer; mix the raw materials to obtain a preliminary mixture; calcine and melt the preliminary mixture at 1130-1160℃ to obtain a dry granule slurry; quench the dry granule slurry in water and cool it to room temperature; and then crush it through a 60-120 mesh sieve to obtain the mixture for the protective layer.

5. The ceramic tile according to claim 1, characterized in that, The thickness of the crystalline glaze layer is 0.5-2 mm.

6. The ceramic tile according to claim 1, characterized in that, The thickness of the protective layer is 0.5-2 mm.

7. The method for preparing ceramic tiles according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Apply a surface glaze to the surface of the green body to obtain a green body containing a surface glaze layer; S2. On the surface of the glaze layer, inkjet print the design pattern to obtain a blank containing the pattern layer; S3. Preparation of the mixture for the crystalline glaze layer; S4. Prepare the mixture for the protective layer; S5. Apply the mixture of crystalline glaze layer obtained in step S3 to the surface of the pattern layer by screen dry method, and then apply the mixture of protective layer to the crystalline glaze layer. S6. The green body of the mixture sprayed with the protective layer is fired and polished to obtain a ceramic tile with iridescent structural color.

8. According to the preparation method of claim 7, in step S5, the mesh size of the wire mesh in the dry wire mesh process is 40 mesh.

9. According to the preparation method of claim 7, in step S6, the firing temperature is 1130-1160℃.

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