Ceramic rock plate with jade color luxury effect and preparation method of ceramic rock plate

Abstract

The invention discloses a jade-color luxury-effect ceramic rock plate and a preparation method thereof. The ceramic rock plate sequentially comprises a green body, a transparent cover glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer from bottom to top, the composite dry particle layer is prepared from the following raw material components in parts by weight: 65-69 parts of baddeleyite, 5-7 parts of lepidolite, 10-15 parts of opal, 3-5 parts of kyanite and 1-5 parts of udravite; the anti-reflection dry granules are prepared from the following raw material components in parts by weight: 20 to 25 parts of albite, 25 to 30 parts of quartz, 14 to 16 parts of calcite, 8 to 12 parts of wollastonite and 13.5 to 15.5 parts of zinc oxide. The ceramic rock plate can truly restore the randomness, the layering sense and the multicolor interweaving effect of jade seeping, the mild texture and the natural gloss of the surface of a product are improved, and the luxury effect of jade seeping is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building ceramics, and in particular relates to a ceramic rock plate with a luxurious stone effect and jade color and a preparation method thereof. Background Art

[0002] Jade color is divided into primary and secondary colors based on its formation mechanism. Primary color is determined by internal metallic elements and color-causing ions and typically appears as a single color (e.g., white jade and jasper). Secondary color, also known as patina, is a permeating layer of color formed after the jade is formed, influenced by environmental factors such as soil minerals, moisture, and temperature. It exhibits a gradient and random nature, varying from the surface to the interior. The formation of patina takes a long time (often tens of thousands of years), and each piece of jade is unique. For example, the patina of Hetian jade seed material often exhibits a unique interwoven texture of yellow, red, and black. Jade textures are also diverse, formed by geological processes such as crystal growth and crack filling, and exhibit natural, flowing fractal characteristics (self-similar fractal dimension 1.7-1.9). For example, the interwoven fiber structure of Hetian jade creates a delicate, warm texture, while the granular structure of jadeite produces a dynamic and varied "emerald green" quality. Because jade requires specific geological conditions and a long time to form, its resources are extremely scarce. For example, the annual production of Hetian jade seed material is less than 200 tons, and the quality rate is less than 5%. Excessive mining can easily lead to ecological damage and safety hazards. Furthermore, jade processing requires precise steps such as cutting, carving, and polishing, and any error in this process can result in loss of value. Therefore, ceramic rock slabs with a luxurious jade-like effect have emerged.

[0003] Currently, existing ceramic rock slabs still have shortcomings in imitating the effect of jade. It is difficult to truly restore the color and texture of jade, and there is a certain gap between the texture and visual effect and natural jade. This is specifically manifested in the following two aspects:

[0004] First, the degree of color and texture restoration is low. Traditional glaze systems are prone to color deviation (ΔE ≥ 3.5) when fired above 1200°C due to color-developing substances (such as iron and copper oxides), and the color gamut coverage is only 60% of natural jade (based on CIELAB space analysis). For example, when imitating the white color of Hetian jade, it is easy to yellow (ΔE = 2.8), and the green color of jadeite is often too bright (saturation deviation > 20%). At the same time, the color requires a random distribution of multiple colors, but the existing dry particle application process can only achieve a color overlap rate of less than 40%, and lacks the gradient characteristics from the surface to the inside. Because the color is a complex effect of mixing multiple colors, and it is random and non-replicable, it is difficult for ceramic rock slabs to achieve this effect through existing technical means. For example, to imitate the yellow, red and black interwoven color of Hetian jade seed material, ceramic rock slabs can often only present a vague color transition, which cannot reflect the layering and richness of the color. In terms of texture, existing digital printing technology is limited by resolution (typically ≤600dpi), making it incapable of reproducing the 0.1mm-level micro-cracks found in natural jade. While some ceramic slabs can mimic jade textures through printing and engraving, these textures often appear stiff and unnatural. For example, when mimicking the delicate, warm texture of Hetian jade, ceramic slabs may exhibit a rough texture and lack layering; when mimicking the dynamic and varied texture of jadeite, ceramic slabs may exhibit a rigid and discontinuous texture. This is because the texture of ceramic slabs is artificially created and lacks the naturally grown texture characteristics of natural jade.

[0005] Second, the texture and visual effects are poor. Jade has a unique texture, such as warmth, delicacy, and luster. The warm touch of jade comes from the diffuse reflection of light by its fiber interwoven structure (the smoothness of the reflectivity curve reaches 92%), while the glass phase structure of ceramic rock panels (reflectivity>85%) leads to an excessively high proportion of mirror reflection, resulting in a bright metallic luster. Even with surface treatment technologies such as glazing and polishing, the surface roughness (Ra) still reaches 0.8-1.2μm, which is much higher than the 0.1-0.3μm of natural jade. The texture of ceramic rock panels still appears stiff and cold, lacking the softness and warmth of jade. At the same time, the gloss of jade is also one of its important characteristics. The oily gloss of natural jade (60° gloss 65-75GU) is determined by its internal crystal structure and light reflection, and has a unique soft luster. The high-gloss glaze (gloss > 90GU) of ceramic rock slabs is mainly achieved through surface glaze or polishing, which often appears too bright or dazzling, and there is a significant gap in the gloss of natural jade. In addition, from the overall visual effect, existing ceramic rock slabs lack a natural beauty and artistic charm compared to natural jade. The color, texture and texture of natural jade blend together to form a harmonious and unified visual effect. However, due to the deficiencies in color, texture and texture of ceramic rock slabs, their visual effect appears stiff and uncoordinated, and they cannot give people aesthetic enjoyment.

[0006] Therefore, there is an urgent need to develop a ceramic rock plate that can highly restore the color and texture of jade, as well as the texture and visual effects, so that it has the luxurious stone effect of natural jade color. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a ceramic rock plate with a jade-like color and a luxury stone effect and a preparation method thereof. The ceramic rock plate can truly restore the randomness, layering and multi-color interweaving effect of the jade-like color, enhance the warm texture and natural luster of the product surface, and at the same time enhance the anti-fouling, wear resistance and transparency of the rock plate, thereby achieving a luxury stone effect with jade-like color.

[0008] In order to solve the above technical problems, the first aspect of the present invention provides a ceramic rock plate, which comprises, from bottom to top, a body, a transparent surface glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer;

[0009] The raw material components for preparing the composite dry particle layer include color-infiltrating dry particles and anti-transmission dry particles. The raw material components of the color-infiltrating dry particles include, by weight, 65-69 parts of baddeleyite, 5-7 parts of lepidolite, 10-15 parts of opal, 3-5 parts of kyanite, and 1-5 parts of grossular garnet; the raw material components of the anti-transmission dry particles include, by weight, 20-25 parts of albite, 25-30 parts of quartz, 14-16 parts of calcite, 8-12 parts of wollastonite, and 13.5-15.5 parts of zinc oxide.

[0010] The present invention uses high-zirconium color-infused dry particles and high-calcium-zinc transparency-enhancing dry particles as raw materials to prepare a composite dry particle layer. The irregular reflection of high-refractive-index zirconium oxide crystals improves the reflectivity of multi-color light. The suspended high-calcium-zinc low-temperature transparency-enhancing dry particles enhance the sense of color depth. Layering simulated jade-colored composite dry particles on a native-color base with a jade-textured pattern layer overcomes the traditional limitation of a color overlap rate of less than 40%. Simultaneously, a transparent dry particle layer is positioned between a first protective glaze layer and a second protective glaze layer, forming an alternating stacked structure. The protective glaze and transparent dry particles co-melt to form a glass phase, resulting in a surface gloss closer to the natural jade petroleum grease gloss. The double-layer protective glaze structure also helps reduce pores on the glaze surface, thereby improving the glaze's light transmittance.

[0011] Specifically, the patina dry granules are primarily made from baddeleyite, with a limited amount of lepidolite, opal, kyanite, and grossular garnet added to enhance the overall fidelity of the product's jade-like patina and texture. Baddeleyite, as the primary source of ZrO2, provides high reflectivity to the glaze, allowing the ceramic slab to exhibit a multi-colored shimmering effect similar to natural jade under light, significantly enhancing the fidelity of the patina. Lepidolite is primarily composed of K2O, with small amounts of associated elements such as rubidium (Rb) and cesium (Cs), which assist in the formation and adjustment of color, enriching the patina's hue. During the firing process, the SiO2·nH2O in opal evaporates, creating tiny pores or voids. These microstructures help scatter light, further enhancing the three-dimensionality and layering of the patina. Kyanite and grossular garnet provide components such as Al2O3, synergizing with the other ingredients to promote the formation of patina and texture.

[0012] The raw materials for the anti-transparency dry particles primarily include quartz, albite (a low-temperature fluxing material), and calcite and zinc oxide (high-temperature fluxing materials). The interaction of these components during the low-temperature melting process not only improves the product's wear resistance and anti-fouling properties, but also helps achieve a color and texture similar to that of natural jade. Among them, SiO2 is a key component in forming the glass phase. It enables the anti-transparency dry particles to form a uniform glassy substance after melting, filling gaps while improving the product's transparency and gloss. CaO and ZnO help adjust the physical and chemical properties of the glass phase. CaO reduces the high-temperature viscosity of the glaze, promoting melting and diffusion, and allowing the anti-transparency dry particles to better bond with the color-infusing dry particles. ZnO has a good fluxing effect, reducing the glaze's expansion coefficient, improving the product's thermal stability, and enhancing the glaze's color.

[0013] In some embodiments of the present invention, the chemical composition of the Qinse dry particles includes, by weight percentage: ZrO2 65-69%, SiO2 15-25%, Al2O3 5-10%, R2O 3-7%, CaO+MgO≤5%; wherein: R2O represents K2O and / or Na2O.

[0014] Specifically, ZrO2, with its high reflectivity, lays the foundation for the product's realistic jade-like color and texture. Other components work together with ZrO2 to further enhance the product's jade-like color and texture. Among them, SiO2 is a key component in forming the glass phase, lowering the melting point of the granules and promoting better melting during firing; Al2O3 improves the chemical stability and mechanical strength of the granules; R2O, acting as a flux, lowers the firing temperature of the granules and promotes their integration with other glaze layers; and CaO and MgO adjust the structure and properties of the glass phase.

[0015] In terms of color formation, SiO2 participates in the formation of the glass phase, allowing various color-causing components to be evenly dispersed within it, resulting in a more uniform and natural color. The stable structure of Al2O3 helps maintain color durability, preventing fading and discoloration during subsequent use. The fluxing effect of R2O allows different colored dry particles to interpenetrate and fuse at lower temperatures, achieving richer color gradations and more natural color transitions, contributing to the jade's multi-colored interweaving and naturally transitioning color. CaO and MgO affect the refractive index of the glass phase, and in conjunction with the high reflectivity of ZrO2, they further enhance the reflection of multi-colored light, making the color more vivid and bright.

[0016] In terms of texture formation, SiO2 affects the fluidity and surface tension of the glass phase, helping to create a delicate, smooth texture and avoiding problems such as roughness and fractures. Al2O3 helps strengthen the bonding between the dry particles and other layers, allowing the texture to adhere firmly to the surface of the slab, preventing it from falling off or deforming. This ensures the integrity and clarity of the texture and gives the jade texture a more refined feel. R2O helps improve the fluidity of the dry particles, making the texture more natural and smooth during formation, avoiding stiff and discontinuous textures. CaO and MgO help refine the crystal structure, making the texture more delicate and enhancing the fidelity of the texture, making the texture on the slab surface more similar to the texture characteristics of natural jade.

[0017] In some embodiments of the present invention, the particle size range of the Qinse dry particles is D95 between 250-300 μm.

[0018] Specifically, the appropriate particle size of the color-infiltrating dry particles allows them to form a specific spatial structure within the product. During the dry particle application process, this particle size provides a larger gap for the anti-transmitting dry particles, facilitating their filling after low-temperature melting. This creates a complex microstructure, contributing to a unique optical effect and layered texture. Furthermore, the appropriately sized high-zirconium color-infiltrating dry particles disperse better across the ceramic slab surface, simulating the uneven color distribution and clumpy characteristics of natural jade color-infiltrating, further enhancing the color-infiltrating effect.

[0019] In some embodiments of the present invention, the particle size range of the permeability-enhancing dry particles is D95 between 150-250 μm.

[0020] Specifically, this particle size allows the anti-transparency dry particles, after low-temperature melting, to fill the gaps between the color-enhancing dry particles, creating a stable, "suspended" three-dimensional effect. This microstructure not only enhances the product's visual depth but also influences the propagation of light. When light passes through the ceramic slab, it refracts, reflects, and scatters between the dry particles of different sizes, simulating the optical effects of natural jade and enhancing the product's sense of transparency.

[0021] In some embodiments of the present invention, the mass ratio of the color-infiltrating dry particles to the transparency-enhancing dry particles is 1:(0.55-0.65).

[0022] In some embodiments of the present invention, the raw material components for preparing the transparent dry particle layer are the same as the raw material components for preparing the transparency-enhancing dry particles.

[0023] In some embodiments of the present invention, the raw material components for preparing the first protective glaze layer include, by weight: 45-55 parts of potassium feldspar, 20-25 parts of quartz, 10-15 parts of wollastonite, 5-8 parts of calcite, 3-5 parts of zinc oxide, 2-4 parts of aluminum oxide, and 3-5 parts of glue.

[0024] Specifically, the protective glaze and the transparent dry particles co-melt to form a glass phase, which not only imparts a gloss similar to that of natural jade but also enhances the glaze's wear resistance and anti-fouling properties. Potassium feldspar, the primary flux, melts first during firing, forming a glassy precursor. Zinc oxide, a fluxing agent, lowers the glaze's melting temperature, promoting the formation of a liquid phase. This allows ion exchange between the protective glaze and the CaO and ZnO in the transparent dry particles, resulting in an interlocking structure. Quartz and alumina form a stable glassy network at high temperatures, blending with the ZrO2 in the color-infiltrating dry particles and the glass phase in the transparent dry particles to enhance the overall density of the glaze. Glue increases the viscosity of the slurry during the drying process, allowing the protective glaze to penetrate the gaps between the composite dry particles and the transparent dry material. Glue decomposes into gas at high temperatures and is released, leaving microchannels for the glass phase to fill, thereby enhancing interfacial bonding.

[0025] In some embodiments of the present invention, the glue is carboxymethyl cellulose or other high molecular polymers.

[0026] In some embodiments of the present invention, the raw material components for preparing the second protective glaze layer are the same as the raw material components for preparing the first protective glaze layer.

[0027] In some embodiments of the present invention, the transparent glaze layer is formed by firing a transparent glaze and is used to enhance the coloring effect of the underlying jade texture pattern.

[0028] In some embodiments of the present invention, the transparent glaze is selected from GYS-MY13 high-transparency glaze produced by Guangdong Daoshi Technology Co., Ltd.

[0029] The ceramic rock slab of the present invention has no special requirements for the blank, and conventional ceramic rock slab blanks can be used.

[0030] The second aspect of the present invention provides a method for preparing the above-mentioned ceramic rock plate, comprising the following steps:

[0031] The surface of the blank is sequentially coated with a transparent top glaze, inkjet-printed with a jade texture pattern, applied with composite dry particles, applied with a first protective glaze, applied with transparent dry particles, and applied with a second protective glaze, forming a transparent top glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer, and a second protective glaze layer. After drying, the blank is fired in a kiln to obtain the ceramic rock plate.

[0032] In some embodiments of the present invention, the step of applying the composite dry particles is as follows: according to the design requirements of the product, the composite dry particles are positioned and applied in a preset area on the surface of the jade texture pattern layer to form a color-intensive area, and the application amount of the color-intensive area is 200-320g / m 2 Then randomly apply the composite dry particles in the non-preset area to form a color diffusion area, and the application amount of the color diffusion area is 20-120g / m2 .

[0033] In some embodiments of the present invention, the positioning application is performed using a carved roller or glue.

[0034] In some embodiments of the present invention, the random distribution adopts a swinging diffusion method.

[0035] Specifically, traditional single dry granule application methods (such as scattering or screen application) make it difficult to precisely control the color diffusion area and density, resulting in poor layering and insufficient randomness. The present invention applies high-concentration composite dry granules in a predetermined area to create a dense color diffusion zone, achieving an edge jaggedness of less than 15% and a texture similarity of 92%. Simultaneously, low-concentration composite dry granules are applied in non-predetermined areas to simulate the random diffusion effect of natural color diffusion.

[0036] In some embodiments of the present invention, the positioned application uses a 40-mesh two-layer screen to reduce the error in the uniformity of dry particle distribution and further improve the application accuracy.

[0037] In some embodiments of the present invention, the specific gravity of the first protective glaze is 1.09-1.11 g / cm 3 , the application amount is 265-285g / m 2 .

[0038] In some embodiments of the present invention, the specific gravity of the second protective glaze is 1.07-1.09 g / cm 3 , the application amount is 175-195g / m 2 .

[0039] In some embodiments of the present invention, the particle size range of the first protective glaze and the second protective glaze is D95 between 21-25 μm.

[0040] In some embodiments of the present invention, the specific gravity of the glaze is 1.41-1.43 g / cm 3 , the application amount is 425-445g / m 2 .

[0041] In some embodiments of the present invention, the jade texture pattern is inkjet printed using a combination of four colors + special inks to achieve a color gamut coverage of ≥95% (CIE 1976)

[0042] In some embodiments of the present invention, the amount of the transparent dry particle layer applied is 700-750 g / cm 3 .

[0043] In some embodiments of the present invention, the maximum firing temperature is 1160-1200° C. This firing temperature can ensure that the composite dry particles and the protective glaze are fully melted, while preventing the decomposition of ZrO2 crystals and maintaining high reflectivity.

[0044] In some embodiments of the present invention, the firing period is 50-65 minutes.

[0045] Compared with the prior art, the above technical solution of the present invention has at least the following technical effects or advantages:

[0046] (1) The present invention uses high-zirconium color-infiltrating dry particles and high-calcium-zinc anti-transmittance dry particles as raw materials to prepare a composite dry particle layer, and improves the multi-color light reflectivity through the irregular reflection of high-refractive-index zirconium oxide crystals; and utilizes the suspension wrapping of low-temperature anti-transmittance dry particles to enhance the color layering, breaking through the traditional process limit of color overlap rate of less than 40%.

[0047] (2) The present invention arranges the transparent dry particle layer between the double-layer protective glaze structure of the first protective glaze layer and the second protective glaze layer to form an alternating superimposed structure, and the protective glaze and the transparent dry particles are eutectic to form a glass phase, so that the 60° glossiness of the glaze surface is 75-85GU, which matches the glossiness of natural jade petroleum grease (65-75GU); the surface roughness Ra≤0.3μm, which is close to the delicate touch of natural jade; and the double-layer protective glaze structure is conducive to reducing the pores of the glaze surface, thereby improving the light transmittance of the glaze surface and achieving a jade-like transparent effect; and the glaze surface has excellent wear resistance and anti-fouling properties.

[0048] (3) The present invention forms a color-intensive area by positioning and applying high-concentration composite dry particles in a preset area, which can achieve low edge jaggedness and high texture similarity; at the same time, low-concentration composite dry particles are applied in non-preset areas to simulate the random diffusion effect of natural color, achieving high-precision color with ΔE < 1.5. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a physical picture of the ceramic rock plate prepared in Example 1 of the present invention;

[0050] Figure 2 This is a physical picture of the ceramic rock plate prepared in Example 2 of the present invention;

[0051] Figure 3 This is a physical picture of the ceramic rock plate prepared in Example 3 of the present invention;

[0052] Figure 4 This is a physical picture of the defective part of the ceramic rock plate prepared in Comparative Example 1 of the present invention;

[0053] Figure 5 This is a physical picture of the defective part of the ceramic rock plate prepared in Comparative Example 2 of the present invention;

[0054] Figure 6 This is a physical picture of the defective part of the ceramic rock plate prepared in Comparative Example 3 of the present invention;

[0055] Figure 7 This is a physical picture of the defective part of the ceramic rock plate prepared in Comparative Example 4 of the present invention;

[0056] Figure 8 This is a physical picture of the defective part of the ceramic rock plate prepared in Comparative Example 5 of the present invention;

[0057] Figure 9 This is a physical picture of the defective part of the ceramic rock slab prepared in comparative example 6 of the present invention. DETAILED DESCRIPTION

[0058] The present invention is described in detail below with reference to the examples to facilitate understanding of the present invention by those skilled in the art. It is necessary to point out that the examples are only used to further illustrate the present invention and are not to be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above-mentioned invention should still fall within the scope of protection of the present invention. At the same time, the raw materials mentioned below that are not described in detail are all commercially available products; the process steps or preparation methods that are not mentioned in detail are all process steps or preparation methods known to those skilled in the art.

[0059] Example 1: A ceramic rock plate with a jade-like color (Hetian jade seed material texture pattern)

[0060] A ceramic rock slab comprises, from bottom to top, a body, a transparent surface glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer.

[0061] Among them: the raw material for preparing the transparent glaze layer is GYS-MY13 high-transparency glaze produced by Guangdong Dow Technology Co., Ltd.

[0062] The raw material components for preparing the composite dry particle layer include color-infiltrating dry particles and transparency-enhancing dry particles in a mass ratio of 1:0.6.

[0063] The raw material components of the Qinse dry particles include, by weight, 67 parts of baddeleyite, 6 parts of lepidolite, 12.5 parts of opal, 4 parts of kyanite, and 1.5 parts of grossular garnet; and the particle size range of the Qinse dry particles is D95 between 250 and 300 μm.

[0064] The raw material components of the anti-transmission dry particles include, by weight, 23 parts of albite, 28 parts of quartz, 15.5 parts of calcite, 10 parts of wollastonite, and 14.5 parts of zinc oxide; and the particle size range of the anti-transmission dry particles is D95 between 150-250 μm.

[0065] The raw material components for preparing the transparent dry particle layer are the same as those for preparing the transparency-enhancing dry particles.

[0066] The raw material components for preparing the first protective glaze layer include, by weight, 50 parts of potassium feldspar, 22 parts of quartz, 12 parts of wollastonite, 6 parts of calcite, 4 parts of zinc oxide, 3 parts of aluminum oxide, and 4 parts of carboxymethyl cellulose.

[0067] The raw material components for preparing the second protective glaze layer are the same as those for preparing the first protective glaze layer.

[0068] The method for preparing the ceramic rock plate comprises the following steps:

[0069] (1) Body pretreatment: The ceramic rock slab body (size 1200×2400×6 mm) was transported to the roller kiln drying area and dried to a moisture content of 0.2%.

[0070] (2) Glaze spraying: Use a centrifugal atomizing spray gun with a set pressure of 0.5 MPa, and spray the high-transparency glaze with a constant flow pump (flow rate 435g / m 2 ) is evenly sprayed on the surface of the blank to form a transparent glaze layer with a thickness of 85μm.

[0071] (3) Digital inkjet printing: Load the Hetian jade seed material texture pattern file (resolution 1200dpi), use a four-color + spot color ink combination (CMYK + light white / light gray), control the ink volume at 18pL / dot, and perform inkjet printing on the surface of the transparent glaze layer to form a jade texture pattern layer.

[0072] (4) Compound dry granule application

[0073] Positioning application: The composite dry particles are applied in the preset area (the color-intensive area) by a CNC engraved roller (roller mesh number 40), with an application amount of 260g / m 2 ; Start the vacuum suction device to remove excess dry particles in the unabsorbed area to form a densely colored area.

[0074] Random application: Spread the compound dry particles evenly in non-preset areas, with an application rate of 70g / m 2 , simulate the natural color diffusion, color diffusion area.

[0075] (5) First protective glaze spraying: Use a curtain glazing machine to spray the first protective glaze slurry (specific gravity 1.10g / cm 3 , particle size range is D95 between 21-25μm) with 275g / m 2 The application amount is evenly sprayed on the surface of the composite dry particle layer with a penetration depth of 0.1mm to form the first protective glaze layer.

[0076] (6) Transparent dry granules: Apply transparent dry granules (application amount 735g / m) through a vibrating screen (40 mesh) 2 ), forming a transparent dry particle layer with a thickness of 0.25mm.

[0077] (7) Second protective glaze spraying: Use a high-voltage electrostatic spray gun (voltage 60kV) to spray the protective glaze slurry (specific gravity 1.08g / cm 3 , particle size range is D95 between 21-25μm) with 185g / m 2 Apply a closed spraying amount to form a second protective glaze layer.

[0078] (8) Firing: First, heat the temperature from room temperature to 900℃ within 30 minutes, then heat it to 1180℃ at a rate of 15℃ / min, keep it at that temperature for 15 minutes, then force-cool it to below 50℃ and take it out of the furnace.

[0079] (9) Polishing: Use an automatic polishing machine (grinding head size 1000#) to polish the surface of the fired ceramic rock plate.

[0080] Example 2: A ceramic rock plate with a luxurious stone effect and jade-like color (golden jade texture pattern)

[0081] A ceramic rock slab comprises, from bottom to top, a body, a transparent surface glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer.

[0082] Among them: the raw material for preparing the transparent glaze layer is GYS-MY13 high-transparency glaze produced by Guangdong Dow Technology Co., Ltd.

[0083] The raw material components for preparing the composite dry particle layer include color-infiltrating dry particles and transparency-enhancing dry particles in a mass ratio of 1:0.55.

[0084] The raw material components of the Qinse dry particles include, by weight, 65 parts of baddeleyite, 5 parts of lepidolite, 15 parts of opal, 3 parts of kyanite, and 2 parts of grossular garnet; and the particle size range of the Qinse dry particles is D95 between 250 and 300 μm.

[0085] The raw material components of the anti-transmission dry particles include, by weight, 25 parts of albite, 30 parts of quartz, 14 parts of calcite, 12 parts of wollastonite, and 13.5 parts of zinc oxide; and the particle size range of the anti-transmission dry particles is D95 between 150-250 μm.

[0086] The raw material components for preparing the transparent dry particle layer are the same as those for preparing the transparency-enhancing dry particles.

[0087] The raw material components for preparing the first protective glaze layer include, by weight: 45 parts of potassium feldspar, 20 parts of quartz, 10 parts of wollastonite, 5 parts of calcite, 3 parts of zinc oxide, 2 parts of aluminum oxide, and 3 parts of carboxymethyl cellulose.

[0088] The raw material components for preparing the second protective glaze layer are the same as those for preparing the first protective glaze layer.

[0089] The preparation method of the ceramic rock plate comprises the following steps:

[0090] (1) Body pretreatment: The ceramic rock slab body (size 1200×2400×6 mm) was transported to the roller kiln drying area and dried to a moisture content of 0.2%.

[0091] (2) Glaze spraying: Use a centrifugal atomizing spray gun with a set pressure of 0.5 MPa, and spray the high-transparency glaze with a constant flow pump (flow rate 435g / m 2 ) is evenly sprayed on the surface of the blank to form a transparent glaze layer with a thickness of 85μm.

[0092] (3) Digital inkjet printing: Load the gold silk jade texture pattern file (resolution 1200dpi), use a four-color + spot color ink combination (CMYK + white / gold), control the ink volume to 18pL / dot, and perform inkjet printing on the surface of the transparent glaze layer to form a jade texture pattern layer.

[0093] (4) Compound dry granule application

[0094] Positioning application: The composite dry particles are applied in the preset area (the color-intensive area) by a CNC engraved roller (roller mesh number 40), with an application amount of 260g / m 2 ; Start the vacuum suction device to remove excess dry particles in the unabsorbed area to form a densely colored area.

[0095] Random application: Spread the compound dry particles evenly in non-preset areas at a rate of 70g / m 2 , simulate the natural color diffusion, color diffusion area.

[0096] (5) First protective glaze spraying: Use a curtain glazing machine to spray the first protective glaze slurry (specific gravity 1.10g / cm 3 , particle size range is D95 between 21-25μm) with 175g / m 2 The application amount is evenly sprayed on the surface of the composite dry particle layer with a penetration depth of 0.1mm to form the first protective glaze layer.

[0097] (6) Transparent dry granules: Apply transparent dry granules (application amount 735g / m) through a vibrating screen (40 mesh) 2 ), forming a transparent dry particle layer with a thickness of 0.25mm.

[0098] (7) Second protective glaze spraying: Use a high-voltage electrostatic spray gun (voltage 60kV) to spray the protective glaze slurry (specific gravity 1.08g / cm 3 , particle size range is D95 between 21-25μm) with 195g / m 2 Apply a closed spraying amount to form a second protective glaze layer.

[0099] (8) Firing: First, heat the temperature from room temperature to 900℃ within 30 minutes, then heat it to 1180℃ at a rate of 15℃ / min, keep it at that temperature for 15 minutes, then force-cool it to below 50℃ and take it out of the furnace.

[0100] (9) Polishing: Use an automatic polishing machine (grinding head size 1000#) to polish the surface of the fired ceramic rock plate.

[0101] Example 3: A ceramic rock plate with a jade-like color (beige jade texture pattern)

[0102] A ceramic rock slab comprises, from bottom to top, a body, a transparent surface glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer.

[0103] Among them: the raw material for preparing the transparent glaze layer is GYS-MY13 high-transparency glaze produced by Guangdong Dow Technology Co., Ltd.

[0104] The raw material components for preparing the composite dry particle layer include color-infiltrating dry particles and transparency-enhancing dry particles in a mass ratio of 1:0.65.

[0105] The raw material components of the Qinse dry particles include, by weight, 69 parts of baddeleyite, 7 parts of lepidolite, 10 parts of opal, 5 parts of kyanite, and 5 parts of grossular garnet; and the particle size range of the Qinse dry particles is D95 between 250 and 300 μm.

[0106] The raw material components of the anti-transmission dry particles include, by weight, 20 parts of albite, 25 parts of quartz, 16 parts of calcite, 8 parts of wollastonite, and 15.5 parts of zinc oxide; and the particle size range of the anti-transmission dry particles is D95 between 150-250 μm.

[0107] The raw material components for preparing the transparent dry particle layer are the same as those for preparing the transparency-enhancing dry particles.

[0108] The raw material components for preparing the first protective glaze layer include, by weight, 55 parts of potassium feldspar, 25 parts of quartz, 15 parts of wollastonite, 8 parts of calcite, 5 parts of zinc oxide, 4 parts of aluminum oxide, and 5 parts of carboxymethyl cellulose.

[0109] The raw material components for preparing the second protective glaze layer are the same as those for preparing the first protective glaze layer.

[0110] The preparation method of the ceramic rock plate comprises the following steps:

[0111] (1) Body pretreatment: The ceramic rock slab body (size 1200×2400×6 mm) was transported to the roller kiln drying area and dried to a moisture content of 0.2%.

[0112] (2) Glaze spraying: Use a centrifugal atomizing spray gun with a set pressure of 0.5 MPa, and spray the high-transparency glaze with a constant flow pump (flow rate 435g / m 2 ) is evenly sprayed on the surface of the blank to form a transparent glaze layer with a thickness of 85μm.

[0113] (3) Digital inkjet printing: Load the beige jade texture pattern file (resolution 1200dpi), use a four-color + spot color ink combination (CMYK + light gray / brown), control the ink volume to 18pL / dot, and perform inkjet printing on the surface of the transparent glaze layer to form a jade texture pattern layer.

[0114] (4) Compound dry granule application

[0115] Positioning application: The composite dry particles are applied in the preset area (the color-intensive area) by a CNC engraved roller (roller mesh number 40), with an application amount of 260g / m 2 ; Start the vacuum suction device to remove excess dry particles in the unabsorbed area to form a densely colored area.

[0116] Random application: Spread the compound dry particles evenly in non-preset areas, with an application rate of 70g / m 2 , simulate the natural color diffusion, color diffusion area.

[0117] (5) First protective glaze spraying: Use a curtain glazing machine to spray the first protective glaze slurry (specific gravity 1.10g / cm 3 , particle size range is D95 between 21-25μm) with 285g / m 2 The application amount is evenly sprayed on the surface of the composite dry particle layer with a penetration depth of 0.1mm to form the first protective glaze layer.

[0118] (6) Transparent dry granules: Apply transparent dry granules (application amount 735g / m) through a vibrating screen (40 mesh) 2 ), forming a transparent dry particle layer with a thickness of 0.25mm.

[0119] (7) Second protective glaze spraying: Use a high-voltage electrostatic spray gun (voltage 60kV) to spray the protective glaze slurry (specific gravity 1.08g / cm 3 , particle size range is D95 between 21-25μm) with 175g / m 2 Apply a closed spraying amount to form a second protective glaze layer.

[0120] (8) Firing: First, heat the temperature from room temperature to 900℃ within 30 minutes, then heat it to 1180℃ at a rate of 15℃ / min, keep it at that temperature for 15 minutes, then force-cool it to below 50℃ and take it out of the furnace.

[0121] (9) Polishing: Use an automatic polishing machine (grinding head size 1000#) to polish the surface of the fired ceramic rock plate.

[0122] Comparative Example 1

[0123] The only difference between Comparative Example 1 and Example 1 is that Comparative Example 1 uses a single Qinse dry granule instead of the composite dry granule of Example 1, that is, only Qinse dry granules are used without adding transparency-enhancing dry granules.

[0124] Comparative Example 2

[0125] The difference between Comparative Example 2 and Example 1 is only that the raw material components of the Qinse dry particles are different. The raw material components of the Qinse dry particles in Comparative Example 2 include, by weight, 60 parts of baddeleyite, 7 parts of lepidolite, 12.5 parts of opal, 6 parts of kyanite, and 2.5 parts of grossular garnet.

[0126] Comparative Example 3

[0127] The difference between Comparative Example 3 and Example 1 is only that the raw material components of the anti-transmission dry particles are different. The raw material components of the anti-transmission dry particles in Comparative Example 3 include, by weight, 26 parts of albite, 35 parts of quartz, 10 parts of calcite, 10 parts of wollastonite, and 10 parts of zinc oxide.

[0128] Comparative Example 4

[0129] The only difference between Comparative Example 4 and Example 1 is the particle size range of the anti-transmission dry particles. The particle size range of the anti-transmission dry particles in Comparative Example 4 is D95 between 250-300 μm.

[0130] Comparative Example 5

[0131] The only difference between Comparative Example 5 and Example 1 is that the ceramic rock plate of Comparative Example 5 does not contain the first protective glaze layer.

[0132] Comparative Example 6

[0133] The only difference between Comparative Example 6 and Example 1 is the different application method of the composite dry particles. Comparative Example 6 only performs targeted application to form a densely colored area, without random application.

[0134] Performance Testing

[0135] The ceramic rock slab samples prepared in Examples 1-3 and Comparative Examples 1-6 were subjected to relevant performance tests and the jade-like effects of the glaze were observed. The results are shown in Table 1.

[0136] The gloss test uses a 60° gloss meter and is conducted in accordance with GB / T 9754-2007 “Paints and varnishes – Determination of specular gloss at 20°, 60° and 85° of paint films not containing metallic pigments”.

[0137] ΔE was calculated using a colorimeter (X-Rite MA98, measuring diameter 8 mm) based on the CIELAB color space and in accordance with GB / T7771-2008 “Visual colorimetry of paints and varnishes”.

[0138] The color overlap ratio was calculated by observing the color distribution area of the composite dry granular layer using an optical microscope (magnification of 50-100 times) and using Image-Pro Plus image analysis software to calculate the overlapping area ratio of different color regions.

[0139] The roughness is tested using a surface roughness measuring instrument according to GB / T 1031-2009 “Surface roughness parameters and their values”.

[0140] The wear resistance is tested according to GB / T3810.7-2016 "Determination of surface wear resistance of ceramic glazed tiles" to determine the amount of grinding; the anti-fouling level is tested according to "GB / T3810.14-2016 Ceramic Tile Test Methods Part 14: Determination of pollution resistance". The anti-fouling performance is divided into levels, with level 1 indicating the worst anti-fouling effect and level 5 indicating the best anti-fouling effect.

[0141] Table 1:

[0142]

[0143]

[0144] As can be seen from Table 1, the ceramic rock slabs prepared in Examples 1-3 all have the layered sense of jade color and multi-color interweaving effect, the surface is warm and transparent, breaking through the limitation of the traditional color overlap rate of <40%, the color overlap rate can reach 82-85%, and the color layering is strong; the glaze 60° glossiness is 75-85GU, which matches the natural jade petroleum grease gloss (65-75GU); the surface roughness Ra is <0.3μm, which is close to the delicate touch of natural jade; ΔE is <1.5, with high-precision color; and the glaze wear resistance can reach level 4, and the anti-fouling performance can reach level 5.

[0145] Compared with Example 1, Comparative Example 1 uses only a single color-infiltrating dry particle and does not add transparency-enhancing dry particles, so it is impossible to form multi-color interweaving, resulting in a low color overlapping rate, a single yellowish color, uneven gloss, strong mirror reflection in some parts, turbid glaze without a sense of transparency, and reduced wear resistance and anti-fouling properties.

[0146] Compared with Example 1, Comparative Example 2 has a lower content of baddeleyite in the dry particles, which affects the color restoration and glaze reflectivity, resulting in large color difference, rough texture, low and uneven gloss, blurred microcrack structure, and reduced wear resistance and anti-fouling properties.

[0147] In Comparative Example 3 compared to Example 1, due to the low content of calcite and zinc oxide in the raw material components of the anti-transparency dry particles, the dry particles are not fully melted, resulting in a granular feel and pores on the glaze surface, a lack of softness in the gloss, and reduced wear resistance and anti-fouling properties.

[0148] Compared with Example 1, in Comparative Example 4, since the particle size of the transmittance-enhancing dry particles is too large, they cannot form an ideal "suspended wrapping" structure with the color-infiltrating dry particles, resulting in uneven light scattering, abrupt color boundaries, and a lack of gradual layering; the glaze transmittance decreases, and the overall glaze surface is turbid.

[0149] Compared with Example 1, Comparative Example 5 does not contain the first protective glaze layer, and the composite dry particle layer is exposed, resulting in increased porosity in the glaze layer, pinholes and pits on the glaze surface, unstable gloss due to lack of glass phase support, matte spots in some areas, a stiff texture, and significantly reduced anti-fouling and wear resistance.

[0150] Compared with Example 1, Comparative Example 6 does not perform random application, but only targeted application to make the color distribution concentrated and the edges neat. It cannot simulate the random diffusion effect of natural color, the texture and color are disconnected, and the sense of natural diffusion is lost.

[0151] For those skilled in the art to which the present invention belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, without having to resort to creative work. Therefore, based on the disclosure of the present invention, simple improvements made by those skilled in the art to the present invention should be within the scope of protection of the present invention. The above embodiments are preferred embodiments of the present invention, and all processes similar to the present invention and equivalent changes made should fall within the scope of protection of the present invention.

Claims

1. A ceramic rock plate, characterized in that: From bottom to top, it includes a body, a transparent surface glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer, and a second protective glaze layer; The raw material components for preparing the composite dry particle layer include color-infiltrating dry particles and anti-transmission dry particles. The raw material components of the color-infiltrating dry particles include, by weight, 65-69 parts of baddeleyite, 5-7 parts of lepidolite, 10-15 parts of opal, 3-5 parts of kyanite, and 1-5 parts of grossular garnet; the raw material components of the anti-transmission dry particles include, by weight, 20-25 parts of albite, 25-30 parts of quartz, 14-16 parts of calcite, 8-12 parts of wollastonite, and 13.5-15.5 parts of zinc oxide.

2. The ceramic rock plate according to claim 1, characterized in that: The particle size range of the color-infiltrating dry particles is D95 between 250-300 μm; and / or the particle size range of the transparency-enhancing dry particles is D95 between 150-250 μm.

3. The ceramic rock plate according to claim 1 or 2, characterized in that: The mass ratio of the color-infiltrating dry particles to the transparency-enhancing dry particles is 1:(0.55-0.65).

4. The ceramic rock plate according to claim 1, characterized in that: The raw material components for preparing the transparent dry particle layer are the same as the raw material components for preparing the transparency-enhancing dry particles.

5. The ceramic rock plate according to claim 1, characterized in that: The raw material components for preparing the first protective glaze layer include, by weight: 45-55 parts of potassium feldspar, 20-25 parts of quartz, 10-15 parts of wollastonite, 5-8 parts of calcite, 3-5 parts of zinc oxide, 2-4 parts of aluminum oxide, and 3-5 parts of glue.

6. The ceramic rock plate according to claim 5, characterized in that: The raw material components for preparing the second protective glaze layer are the same as the raw material components for preparing the first protective glaze layer.

7. A method for preparing a ceramic rock plate according to any one of claims 1 to 6, characterized in that: The following steps are involved: The surface of the blank is sequentially coated with a transparent top glaze, inkjet-printed with a jade texture pattern, applied with composite dry particles, applied with a first protective glaze, applied with transparent dry particles, and applied with a second protective glaze, forming a transparent top glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer, and a second protective glaze layer. After drying, the blank is fired in a kiln to obtain the ceramic rock plate.

8. The method for preparing a ceramic rock plate according to claim 7, characterized in that: The step of applying the composite dry particles is as follows: according to the design requirements of the product, the composite dry particles are positioned and applied in a preset area on the surface of the jade texture pattern layer to form a color-intensive area, and the application amount of the color-intensive area is 200-320g / m 2 Then randomly apply the composite dry particles in the non-preset area to form a color diffusion area, and the application amount of the color diffusion area is 20-120g / m 2 .

9. The method for preparing a ceramic rock plate according to claim 7, characterized in that: The specific gravity of the first protective glaze is 1.09-1.11 g / cm 3 , the application amount is 265-285g / m 2 and / or, the specific gravity of the second protective glaze is 1.07-1.09g / cm 3 , the application amount is 175-195g / m 2 .

10. The method for preparing a ceramic rock plate according to claim 7, characterized in that: The maximum firing temperature is 1160-1200° C.; and / or the firing period is 50-65 minutes.

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