A matte super-soft ceramic tile with a digital mold effect and a preparation method thereof

Abstract

This invention belongs to the field of architectural ceramics, specifically disclosing a matte ultra-soft ceramic tile with a digital mold effect and its preparation method. The ceramic tile comprises, from bottom to top, a body, a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer. The raw materials for preparing the intermediate glaze layer, by weight, include: 20-35 parts of sodium feldspar, 5-10 parts of potassium feldspar, 5-10 parts of wollastonite, 5-15 parts of dolomite, 5-15 parts of washed clay, 5-20 parts of calcined talc, 3-8 parts of calcined kaolin, 2-5 parts of alumina, 10-20 parts of barium carbonate, 1-5 parts of calcined zinc oxide, and 2-5 parts of strontium carbonate. The raw materials for preparing the digital micro-engraving ink layer, by weight, include: 40-50 parts of inorganic materials, 3-8 parts of dispersant, and 40-60 parts of solvent; the inorganic materials contain bismuth vanadate, a low-temperature first glass powder, and a high-temperature second glass powder.

Description

Technical Field

[0001] This invention belongs to the field of building ceramics, specifically relating to a matte ultra-flexible ceramic tile with a digital mold effect and its preparation method. Background Technology

[0002] In recent years, textured ceramic tiles with a smooth touch, natural light, and 3D mold effects have become increasingly popular among consumers. These products are currently primarily achieved through smooth glazes, which typically have a gloss level of 10-20°. To achieve a smooth touch, a certain glaze thickness is required, making it difficult to maintain both a smooth feel and high transparency when the glaze gloss is below 10°. Furthermore, to achieve a good smooth touch, smooth glazes require a high content of alkaline earth metal oxides as high-temperature fluxes, such as CaO, MgO, and ZnO. However, excessive CaO and ZnO easily react with SiO2 and Al2O3 to form anorthite crystals and zinc silicate crystals, leading to crystallization and crystal spots on the glaze surface. Excessive MgO, on the other hand, can cause the glaze to become dull and appear cloudy.

[0003] Currently, the molded effect of ceramic tiles is mainly achieved through two processes: one is peeling off the glaze, and the other is etching the glaze with sunken ink. Peeling off the glaze is generally achieved using high-temperature matte glazes. However, due to the characteristics of soft glazes—low viscosity at high temperatures and easy melting—the three-dimensional effect after peeling is prone to melting and collapsing. Etching the glaze with sunken ink, on the other hand, produces an overly wide and rounded texture, so the industry rarely uses it to produce soft-surface digital molded tiles, and these soft-surface tiles are far from the effect of natural jade.

[0004] Therefore, there is an urgent need to develop a matte ultra-soft ceramic tile with digital mold effect, which can achieve low gloss, ultra-softness, high transparency, no obvious crystal spots, and consistent gloss and color on the mold's concave and convex parts while ensuring product quality. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a matte ultra-soft ceramic tile with a digital mold effect and its preparation method. The ceramic tile has a low gloss (6-10°), no obvious crystal spots on the glaze, a soft texture, high transparency, and a realistic mold effect, which is comparable to the texture of natural jade.

[0006] To solve the above-mentioned technical problems, the first aspect of the present invention provides a ceramic tile, which comprises, from bottom to top, a body, a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer;

[0007] The raw materials for preparing the intermediate glaze layer include, by weight: 20-35 parts of sodium feldspar, 5-10 parts of potassium feldspar, 5-10 parts of wollastonite, 5-15 parts of dolomite, 5-15 parts of washed clay, 5-20 parts of calcined talc, 3-8 parts of calcined kaolin, 2-5 parts of alumina, 10-20 parts of barium carbonate, 1-5 parts of calcined zinc oxide, and 2-5 parts of strontium carbonate.

[0008] The raw materials for preparing the digital micro-engraved ink layer include, by weight: 40-50 parts of inorganic material, 3-8 parts of dispersant and 40-60 parts of solvent; the inorganic material contains bismuth vanadate, a first glass powder and a second glass powder, wherein the initial melting temperature of the first glass powder is 980-1090℃ and the initial melting temperature of the second glass powder is 1150-1230℃.

[0009] Specifically, this invention adjusts the raw material composition of the intermediate glaze and adds higher contents of divalent alkaline earth metal elements such as Mg, Ca, Ba, Zn, and Sr. Among them, MgO, CaO, and BaO form crystals such as magnesium silicate, calcium feldspar, and barium silicate in the glaze, making the glaze surface matte; MgO, SrO, and ZnO can significantly increase the high-temperature fluidity and firing range of the glaze, forming a glaze layer with a wide firing range, low gloss, and smooth touch; the combined effect of the raw materials achieves a low-gloss, matte, soft-surface glaze effect.

[0010] The main raw materials for preparing the digital micro-engraving ink layer of this invention are bismuth vanadate, a first glass powder, and a second glass powder. Specifically: the first glass powder has a low initial melting temperature and is a low-temperature frit powder. It acts as a strong flux in the digital micro-engraving ink, fully melting with low-temperature raw materials such as Na2O, K2O, ZnO, and MgO in the intermediate glaze layer during high-temperature firing, resulting in significant firing shrinkage. The second glass powder has a high initial melting temperature and is a high-temperature frit powder, mainly used to adjust the melting temperature of the digital micro-engraving ink. At high temperatures, bismuth vanadate reduces the viscosity and surface tension of the intermediate glaze layer, causing the glaze surface to concave, thus forming a mold effect with a concave textured surface and a gradual curvature. Because this textured surface does not rely on peeling away the protective glaze, both the digital micro-engraving functional ink and the pattern color ink act on the intermediate glaze without exposing the base glaze, thus ensuring consistency in light perception and glaze color.

[0011] Preferably, the chemical composition of the first glass powder, by weight percentage, includes: Al2O3 3-7%, SiO2 55-65%, Na2O 0-1%, K2O 2-5%, ZnO 7-12%, Sb2O3 1-4%, CaO 10-18%, MgO 1-4%, and B2O3 0-2%.

[0012] Preferably, the chemical composition of the second glass powder, by weight percentage, includes: Al2O3 16-20%, SiO2 40-44%, Na2O 3-6%, K2O 1-3%, ZnO 5-9%, BaO 14-18%, CaO 1-3%, MgO 0-1%, ZrO2 0-2%, and SrO 4-8%.

[0013] Preferably, the dispersant is TENSIOJET 1049C.

[0014] Preferably, the solvent is an ester solvent, and the ester solvent is isooctyl laurate.

[0015] Preferably, the raw materials for preparing the digital micro-engraving ink layer further include 0-1 parts by weight of additives, wherein the additives include leveling agents.

[0016] Preferably, the leveling agent is AKM3450.

[0017] Preferably, the inorganic material comprises, by weight, 10-15 parts of bismuth vanadate, 40-45 parts of first glass powder, and 40-45 parts of second glass powder.

[0018] Preferably, the protective glaze layer is made of transparent matte dry granules, and the chemical composition of the transparent matte dry granules, by weight percentage, includes: Al2O3 15-20%, SiO2 50-55%, CaO 2-5%, K2O 2-5%, Na2O 2-5%, BaO 5-15%, ZnO 2-5%, and SrO 2-5%.

[0019] Preferably, the particle size of the transparent matte dry granules is 200-300 mesh.

[0020] Specifically, this invention applies ultra-fine dry particles to the outermost layer of ceramic tiles to form a transparent matte glaze layer that protects the colors of the pattern ink. The fine matte dry particles not only eliminate glaze spots caused by the intermediate glaze layer, but also ensure that both the pattern ink layer and the digital micro-engraving ink layer are evenly covered with a matte transparent layer, thereby further ensuring the consistency of the glaze layer's gloss and color, making the texture and gloss of the tile surface closer to natural jade.

[0021] Preferably, the raw materials for preparing the base glaze layer include, by weight: 10-20 parts of sodium feldspar, 20-30 parts of potassium feldspar, 5-15 parts of nepheline, 5-10 parts of washed clay, 10-30 parts of quartz, 10-20 parts of alumina, 1-10 parts of wollastonite, and 5-20 parts of zirconium silicate.

[0022] A second aspect of the present invention provides a method for preparing the above-mentioned ceramic brick, comprising the following steps:

[0023] A base glaze and an intermediate glaze are applied sequentially to the ceramic body, followed by inkjet printing of patterns and digital micro-carving ink, and then a protective glaze is applied, forming a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-carving ink layer, and a protective glaze layer in sequence. After drying, the ceramic brick is fired in a kiln to obtain the ceramic brick.

[0024] Preferably, the specific gravity of the base glaze is 1.85-1.94 g / cm³. 3 The glaze application rate is 400-800g / m². 2 .

[0025] Preferably, the intermediate glaze is applied by pouring glaze.

[0026] Preferably, the specific gravity of the intermediate glaze is 1.85-1.94 g / cm³. 3 Glazing amount is 500-1000g / m 2 .

[0027] Preferably, the inkjet-printed pattern is a stone-like pattern.

[0028] Preferably, the digital micro-engraving ink layer requires the corresponding channel effect halftone pattern to be designed and printed out in Photoshop software, with a pixel size of 5-30px. The designed halftone pattern is then printed onto the intermediate glaze layer using a ceramic digital inkjet printer, with a printing grayscale of 60-100% and a printing yield of 30-75g / m³. 2 .

[0029] Preferably, the firing temperature is 1160-1220℃, and the firing cycle is 40-80 minutes.

[0030] Compared with the prior art, the above-described technical solution of the present invention has at least the following technical effects or advantages:

[0031] This invention achieves a low-gloss, matte, smooth finish by adjusting the composition of the intermediate glaze. A layer of transparent matte dry granules is applied as a protective glaze layer on top of the intermediate glaze, covering the crystalline spots and further reducing its gloss. Furthermore, by adjusting the high-temperature melting properties of the intermediate glaze, it achieves easy melting and leveling, completely smoothing the matte dry granule glaze without affecting the smooth feel of the surface. Simultaneously, this invention uses digital micro-engraving ink with specific components on the intermediate glaze to achieve a raised / recessed mold effect. Since the digital micro-engraving ink and the pattern ink are on the same glaze surface, the surface layer of the product is a uniform, ultra-fine dry granule matte transparent layer, ensuring consistent gloss and color in the raised / recessed mold areas. In addition, this invention adjusts the glazing process, first applying the intermediate glaze, then inkjet printing the pattern and digital micro-engraving ink, and finally applying the protective glaze. This gives the intermediate glaze a certain thickness, resulting in a smooth feel without affecting the clarity and transparency of the inkjet pattern. Therefore, by setting a specific product layer structure and controlling the raw material composition and preparation process of each layer, the present invention prepares a matte ultra-soft ceramic tile with a digital mold effect. The glaze of this ceramic tile can simultaneously achieve a perfect fusion of low gloss, ultra-softness, high transparency, absence of crystal spots, and realistic digital mold effect. Attached Figure Description

[0032] Figure 1 The image shows the actual product of the ceramic tile prepared in Example 1.

[0033] Figure 2 A photograph showing the actual appearance of the ceramic tile prepared in Comparative Example 2;

[0034] Figure 3 A photograph showing the actual appearance of the ceramic tile prepared in Comparative Example 4;

[0035] Figure 4 A photograph showing the actual appearance of the ceramic tile prepared in Comparative Example 5;

[0036] Figure 5 The image shows the actual product of the ceramic tile prepared in Comparative Example 7. Detailed Implementation

[0037] The present invention will now be described in detail with reference to embodiments to facilitate understanding of the invention by those skilled in the art. It is particularly important to note that the embodiments are merely illustrative of the invention and should not be construed as limiting the scope of protection of the invention. Non-essential improvements and adjustments made to the invention by those skilled in the art based on the above description should still fall within the scope of protection of the invention. Furthermore, all raw materials mentioned below, unless otherwise specified, are commercially available products; all process steps or preparation methods not mentioned in detail are process steps or preparation methods known to those skilled in the art.

[0038] Example 1

[0039] A ceramic tile, from bottom to top, comprises a body, a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer. Among them:

[0040] The raw materials for preparing the base glaze layer, by weight, include: 18 parts of sodium feldspar, 25 parts of potassium feldspar, 12 parts of nepheline, 8 parts of washed clay, 20 parts of quartz, 15 parts of alumina, 3 parts of wollastonite, and 12 parts of zirconium silicate.

[0041] The raw materials for preparing the intermediate glaze layer, by weight, include: 25 parts sodium feldspar, 8 parts potassium feldspar, 6 parts wollastonite, 10 parts dolomite, 8 parts washed clay, 15 parts calcined talc, 4 parts calcined kaolin, 3 parts alumina, 14 parts barium carbonate, 4 parts calcined zinc oxide, and 3 parts strontium carbonate.

[0042] The raw materials for preparing the digital micro-engraving ink layer include, by weight: 45 parts of inorganic materials, 5 parts of dispersant TENSIOJET1049C and 50 parts of isooctyl laurate; wherein, the inorganic materials include, by weight: 15 parts of bismuth vanadate, 45 parts of first glass powder and 40 parts of second glass powder.

[0043] The chemical composition of the first glass powder, by weight percentage, includes: Al2O3 5.71%, SiO2 58.92%, Na2O 0.43%, K2O 4.01%, ZnO 9.32%, Sb2O3 1.48%, CaO 16.43%, MgO 2.16%, and B2O3 1.11%.

[0044] The chemical composition of the second glass powder, by weight percentage, includes: Al2O3 17.84%, SiO2 42.37%, Na2O 4.25%, K2O 2.65%, ZnO 6.78%, BaO 16.32%, CaO 2.58%, MgO 0.03%, ZrO2 0.42%, and SrO 6.32%.

[0045] The protective glaze layer is made of transparent matte dry granules. The chemical composition of the transparent matte dry granules, by weight percentage, includes: Al2O3 18.41%, SiO2 53.20%, CaO 3.20%, K2O 4.22%, Na2O 3.46%, BaO 9.83%, ZnO 3.08%, and SrO 3.71%. The particle size of the transparent matte dry granules is 200-300 mesh.

[0046] A method for preparing ceramic tiles includes the following steps:

[0047] (1) Weigh the raw materials for preparing the base glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the base glaze slurry (specific gravity is 1.90 g / cm³). 3The base glaze slurry is applied to the upper surface of the body using a bell-shaped glazing device (glaze application amount is 600g / m²). 2 ), forming a base glaze layer;

[0048] (2) Weigh the raw materials for preparing the intermediate glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the intermediate glaze slurry (specific gravity is 1.90 g / cm³). 3 The intermediate glaze slurry is applied to the upper surface of the base glaze layer obtained in step (1) using a bell-shaped glazing device (glaze application amount is 800g / m). 2 A medium glaze layer is formed; then, ceramic color ink is printed on the surface of the medium glaze layer using a digital inkjet printer to form a marble-like pattern layer.

[0049] (3) Weigh the raw materials for preparing the digital micro-engraving ink layer according to the mass ratio, disperse them evenly, and obtain the digital micro-engraving ink; print the pattern layer obtained in step (2) using a digital inkjet printer, with a printing amount of 60g / m 2 This forms a digital micro-engraving ink layer;

[0050] (4) The transparent matte dry granules and the suspending agent (the components of the suspending agent by weight percentage are: 3% thickener ASE, 3% organic amine, 1% bentonite, 0.5% defoamer BYK-065, 1.5% dispersant BYK-9132, and 91% water) are mixed at a mass ratio of 1:2 to obtain the dry granule glaze slurry; the dry granule glaze slurry is sprayed onto the upper surface of the digital micro-engraving ink layer obtained in step (3) through a glaze spraying device (the application amount is 300g / m). 2 A protective glaze layer is formed; after drying, it is fired in a kiln at a maximum temperature of 1180℃ for 60 minutes, resulting in the matte ultra-soft ceramic tile with digital mold effect of this embodiment.

[0051] Example 2

[0052] A ceramic tile, from bottom to top, comprises a body, a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer. Among them:

[0053] The raw materials for preparing the base glaze layer, by weight, include: 15 parts of sodium feldspar, 27 parts of potassium feldspar, 15 parts of nepheline, 8 parts of washed clay, 17 parts of quartz, 13 parts of alumina, 5 parts of wollastonite, and 12 parts of zirconium silicate.

[0054] The raw materials for preparing the intermediate glaze layer, by weight, include: 27 parts sodium feldspar, 7 parts potassium feldspar, 7 parts wollastonite, 12 parts dolomite, 5 parts washed clay, 14 parts calcined talc, 6 parts calcined kaolin, 2 parts alumina, 14 parts barium carbonate, 4 parts calcined zinc oxide, and 2 parts strontium carbonate.

[0055] The raw materials for preparing the digital micro-engraving ink layer include, by weight: 40 parts of inorganic materials, 5 parts of dispersant TENSIOJET1049C and 55 parts of isooctyl laurate; wherein, the inorganic materials include, by weight: 10 parts of bismuth vanadate, 45 parts of first glass powder and 45 parts of second glass powder.

[0056] The chemical composition of the first glass powder, by weight percentage, includes: Al2O3 4.37%, SiO2 61.21%, Na2O 0.64%, K2O 3.78%, ZnO 9.02%, Sb2O3 2.48%, CaO 13.12%, MgO 3.45%, and B2O3 1.24%.

[0057] The chemical composition of the second glass powder, by weight percentage, includes: Al2O3 18.12%, SiO2 41.45%, Na2O 4.94%, K2O 2.39%, ZnO 6.32%, BaO 17.42%, CaO 1.73%, MgO 0.53%, ZrO2 0.53%, and SrO 6.27%.

[0058] The protective glaze layer is made of transparent matte dry granules. The chemical composition of the transparent matte dry granules, by weight percentage, includes: Al2O3 19.82%, SiO2 51.32%, CaO 4.15%, K2O 3.82%, Na2O 4.12%, BaO 7.83%, ZnO 3.16%, and SrO 4.62%. The particle size of the transparent matte dry granules is 200-300 mesh.

[0059] A method for preparing ceramic tiles includes the following steps:

[0060] (1) Weigh the raw materials for preparing the base glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the base glaze slurry (specific gravity is 1.90 g / cm³). 3 The base glaze slurry is applied to the upper surface of the body using a bell-shaped glazing device (glaze application amount is 600g / m²). 2 ), forming a base glaze layer;

[0061] (2) Weigh the raw materials for preparing the intermediate glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the intermediate glaze slurry (specific gravity is 1.90 g / cm³). 3 The intermediate glaze slurry is applied to the upper surface of the base glaze layer obtained in step (1) using a bell-shaped glazing device (glaze application amount is 800g / m). 2 A medium glaze layer is formed; then, ceramic color ink is printed on the surface of the medium glaze layer using a digital inkjet printer to form a marble-like pattern layer.

[0062] (3) Weigh the raw materials for preparing the digital micro-engraving ink layer according to the mass ratio, disperse them evenly, and obtain the digital micro-engraving ink; print the pattern layer obtained in step (2) using a digital inkjet printer, with a printing amount of 60g / m 2 This forms a digital micro-engraving ink layer;

[0063] (4) A transparent matte dry granule is mixed with a suspending agent (thickener ASE 3%, organic ammonia 3%, bentonite 1%, defoamer BYK-065 0.5%, dispersant BYK-9132 1.5%, water 91%) at a mass ratio of 1:2 to obtain a dry granule glaze slurry; the dry granule glaze slurry is sprayed onto the upper surface of the digital micro-engraving ink layer obtained in step (3) through a glaze spraying device (the application amount is 300g / m). 2 A protective glaze layer is formed; after drying, it is fired in a kiln at a maximum temperature of 1170℃ for 70 minutes, resulting in the matte ultra-soft ceramic tile with digital mold effect of this embodiment.

[0064] Example 3

[0065] A ceramic tile, from bottom to top, comprises a body, a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer. Among them:

[0066] The raw materials for preparing the base glaze layer, by weight, include: 20 parts of sodium feldspar, 25 parts of potassium feldspar, 10 parts of nepheline, 10 parts of washed clay, 15 parts of quartz, 16 parts of alumina, 5 parts of wollastonite, and 12 parts of zirconium silicate.

[0067] The raw materials for preparing the intermediate glaze layer, by weight, include: 27 parts sodium feldspar, 8 parts potassium feldspar, 5 parts wollastonite, 10 parts dolomite, 7 parts washed clay, 12 parts calcined talc, 6 parts calcined kaolin, 3 parts alumina, 14 parts barium carbonate, 4 parts calcined zinc oxide, and 4 parts strontium carbonate.

[0068] The raw materials for preparing the digital micro-engraving ink layer include, by weight: 50 parts of inorganic materials, 5 parts of dispersant TENSIOJET1049C and 45 parts of isooctyl laurate; wherein, the inorganic materials include, by weight: 15 parts of bismuth vanadate, 40 parts of first glass powder and 45 parts of second glass powder.

[0069] The chemical composition of the first glass powder, by weight percentage, includes: Al2O3 5.68%, SiO2 59.40%, Na2O 0.21%, K2O 4.42%, ZnO 9.31%, Sb2O3 2.45%, CaO 14.39%, MgO 2.78%, and B2O3 0.79%.

[0070] The chemical composition of the second glass powder, by weight percentage, includes: Al2O3 18.85%, SiO2 42.59%, Na2O 3.43%, K2O 1.58%, ZnO 7.87%, BaO 16.42%, CaO 2.32%, MgO 0.23%, ZrO2 0.31%, and SrO 6.13%.

[0071] The protective glaze layer is made of transparent matte dry granules. The chemical composition of the transparent matte dry granules, by weight percentage, includes: Al2O3 17.68%, SiO2 51.23%, CaO 2.78%, K2O 4.08%, Na2O 4.72%, BaO 11.05%, ZnO 2.86%, and SrO 4.51%. The particle size of the transparent matte dry granules is 200-300 mesh.

[0072] A method for preparing ceramic tiles includes the following steps:

[0073] (1) Weigh the raw materials for preparing the base glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the base glaze slurry (specific gravity is 1.90 g / cm³). 3 The base glaze slurry is applied to the upper surface of the body using a bell-shaped glazing device (glaze application amount is 600g / m²). 2 ), forming a base glaze layer;

[0074] (2) Weigh the raw materials for preparing the intermediate glaze layer according to the mass ratio, add water and ball mill (mass ratio of material to water is 100:40) to obtain the intermediate glaze slurry (specific gravity is 1.90 g / cm³). 3 The intermediate glaze slurry is applied to the upper surface of the base glaze layer obtained in step (1) using a bell-shaped glazing device (glaze application amount is 800g / m). 2 A medium glaze layer is formed; then, ceramic color ink is printed on the surface of the medium glaze layer using a digital inkjet printer to form a marble-like pattern layer.

[0075] (3) Weigh the raw materials for preparing the digital micro-engraving ink layer according to the mass ratio, disperse them evenly, and obtain the digital micro-engraving ink; print the pattern layer obtained in step (2) using a digital inkjet printer, with a printing amount of 60g / m 2 This forms a digital micro-engraving ink layer;

[0076] (4) The transparent matte dry granules and the suspending agent (the components of the suspending agent by weight percentage are: 3% thickener ASE, 3% organic amine, 1% bentonite, 0.5% defoamer BYK-065, 1.5% dispersant BYK-9132, and 91% water) are mixed at a mass ratio of 1:2 to obtain the dry granule glaze slurry; the dry granule glaze slurry is sprayed onto the upper surface of the digital micro-engraving ink layer obtained in step (3) through a glaze spraying device (the application amount is 300g / m).2 A protective glaze layer is formed; after drying, it is fired in a kiln at a maximum temperature of 1200℃ for 50 minutes, resulting in the matte ultra-soft ceramic tile with digital mold effect of this embodiment.

[0077] Comparative Example 1

[0078] The only difference between Comparative Example 1 and Example 1 is the raw materials used to prepare the intermediate glaze layer. The raw materials used to prepare the intermediate glaze layer in Comparative Example 1 include, by weight, 18 parts of sodium feldspar, 15 parts of potassium feldspar, 5 parts of wollastonite, 13 parts of dolomite, 8 parts of washed clay, 23 parts of calcined talc, 4 parts of calcined kaolin, 3 parts of alumina, 12 parts of barium carbonate, and 4 parts of calcined zinc oxide.

[0079] Comparative Example 2

[0080] The only difference between Comparative Example 2 and Example 1 is the raw materials used to prepare the intermediate glaze layer. The raw materials used to prepare the intermediate glaze layer in Comparative Example 2 include, by weight, 26 parts of sodium feldspar, 8 parts of potassium feldspar, 6 parts of wollastonite, 10 parts of dolomite, 8 parts of washed clay, 20 parts of calcined talc, 4 parts of calcined kaolin, 3 parts of alumina, 12 parts of barium carbonate, and 4 parts of calcined zinc oxide.

[0081] Comparative Example 3

[0082] The only difference between Comparative Example 3 and Example 1 is the raw materials used to prepare the intermediate glaze layer. The raw materials used to prepare the intermediate glaze layer in Comparative Example 3 include, by weight, 25 parts of sodium feldspar, 13 parts of potassium feldspar, 6 parts of wollastonite, 10 parts of dolomite, 8 parts of washed clay, 10 parts of calcined talc, 4 parts of calcined kaolin, 3 parts of alumina, 14 parts of barium carbonate, 4 parts of calcined zinc oxide, and 3 parts of strontium carbonate.

[0083] Comparative Example 4

[0084] The only difference between Comparative Example 4 and Example 1 is the raw material used to prepare the digital micro-engraving ink layer. Comparative Example 4 uses the sinking ink K3012 produced by Shandong Guoci Kanglitai New Material Technology Co., Ltd.

[0085] Comparative Example 5

[0086] The only difference between Comparative Example 5 and Example 1 is the raw material used to prepare the digital micro-engraving ink layer. Comparative Example 5 uses K3016 glossy micro-engraving ink produced by Shandong Guoci Kanglitai New Material Technology Co., Ltd.

[0087] Comparative Example 6

[0088] The only difference between Comparative Example 6 and Example 1 is the type of dry granules used in the protective glaze layer. The chemical composition of the dry granules used in Comparative Example 6, by weight percentage, includes: Al2O3 19.13%, SiO2 55.61%, CaO 4.38%, K2O 4.77%, Na2O 2.45%, MgO 2.23%, BaO 5.44%, ZnO 0.98%, and SrO 3.48%.

[0089] Comparative Example 7

[0090] The only difference between Comparative Example 7 and Example 1 is the layer structure of the ceramic tile. The ceramic tile of Comparative Example 7 includes, from bottom to top, a body, a base glaze layer, a pattern layer, a digital micro-engraving ink layer, and a protective glaze layer.

[0091] Comparative Example 8

[0092] The only difference between Comparative Example 8 and Example 1 is the layer structure of the ceramic tile. The ceramic tile of Comparative Example 8 includes, from bottom to top, a body, a base glaze layer, a pattern layer, a digital micro-engraving ink layer, an intermediate glaze layer, and a protective glaze layer.

[0093] Performance testing

[0094] The ceramic tile samples prepared in Examples 1-3 and Comparative Examples 1-8 were tested for gloss and stain resistance, and the visual effect and three-dimensional feel of the glaze were recorded. The results are shown in Table 1.

[0095] Among them, the gloss test is carried out using a gloss meter; the stain resistance level is tested according to "GB / T3810.14-2016 Ceramic Tile Test Methods Part 14: Determination of Stain Resistance". The stain resistance performance is divided into grades, with grade 1 indicating the worst stain resistance and grade 5 indicating the best stain resistance.

[0096] Table 1: Performance Comparison of Samples Prepared in Examples 1-3 and Comparative Examples 1-8

[0097]

[0098]

[0099] As shown in Table 1, the ceramic tile samples prepared in Examples 1-3 have a gloss of 6-10° and are matte ceramic tiles; the glaze surface has no obvious pinholes, crystal spots and color difference, and has a soft texture, realistic concave and convex mold effect, and good anti-fouling performance. Figure 1 This is a photograph of the actual ceramic tile prepared in Example 1. Figure 1 It can be seen that the glaze has a soft texture and the concave and convex mold effect is natural and realistic, with no obvious defects in the glaze.

[0100] Compared to Example 1, Comparative Examples 1-3, due to the different raw materials used in preparing the intermediate glaze layer, resulted in excessively high glaze gloss, obvious pinholes, and prickly heat on the glaze surface (see Comparative Examples 1-3). Figure 2 Defects such as crystal spots or crystalline spots.

[0101] Compared to Example 1, Comparative Examples 4-5, by using conventional recessed ink and glossy ink instead of digital micro-engraving ink, resulted in a wider, rounder, and less refined glaze surface relief effect (see Comparative Examples 4-5). Figure 3 (or the mold effect is shallow, with bright spots in the recessed areas (see...) Figure 4 ).

[0102] Compared to Example 1, Comparative Example 6 has a different chemical composition of transparent matte dry granules, resulting in color difference in the glaze and poor transparency.

[0103] Compared to Example 1, Comparative Examples 7-8, due to the different layer structure of the ceramic tiles, resulted in a less smooth glaze texture and a harsher embossed effect (see Comparative Examples 7-8). Figure 5 Or, the transparency is poor, or the effect of the embossed mold is too rounded and wide.

[0104] For those skilled in the art, several simple deductions or substitutions can be made without departing from the inventive concept, without requiring creative effort. Therefore, any simple improvements made to this invention by those skilled in the art based on the disclosure of this invention should be within the scope of protection of this invention. The above embodiments are preferred embodiments of this invention, and all processes similar to this invention and equivalent changes should fall within the scope of protection of this invention.

Claims

1. A ceramic tile, characterized in that, From bottom to top, it includes the body, base glaze layer, intermediate glaze layer, pattern layer, digital micro-engraving ink layer, and protective glaze layer; The raw materials for preparing the intermediate glaze layer include, by weight: 20-35 parts of sodium feldspar, 5-10 parts of potassium feldspar, 5-10 parts of wollastonite, 5-15 parts of dolomite, 5-15 parts of washed clay, 5-20 parts of calcined talc, 3-8 parts of calcined kaolin, 2-5 parts of alumina, 10-20 parts of barium carbonate, 1-5 parts of calcined zinc oxide, and 2-5 parts of strontium carbonate. The raw materials for preparing the digital micro-engraving ink layer include, by weight: 40-50 parts of inorganic materials, 3-8 parts of dispersant and 40-60 parts of solvent; the inorganic materials contain bismuth vanadate, first glass powder and second glass powder, the initial melting temperature of the first glass powder is 980-1090℃ and the initial melting temperature of the second glass powder is 1150-1230℃.

2. The ceramic tile according to claim 1, characterized in that, The chemical composition of the first glass powder, by weight percentage, includes: Al2O3 3-7%, SiO2 55-65%, Na2O 0-1%, K2O 2-5%, ZnO 7-12%, Sb2O3 1-4%, CaO 10-18%, MgO 1-4%, B2O3 0-2%; And / or, the chemical composition of the second glass powder, by weight percentage, includes: Al2O3 16-20%, SiO2 40-44%, Na2O 3-6%, K2O 1-3%, ZnO 5-9%, BaO 14-18%, CaO 1-3%, MgO 0-1%, ZrO2 0-2%, SrO 4-8%.

3. The ceramic tile according to claim 1 or 2, characterized in that, The inorganic material comprises, by weight, 10-15 parts of bismuth vanadate, 40-45 parts of first glass powder, and 40-45 parts of second glass powder.

4. The ceramic tile according to claim 1, characterized in that, The protective glaze layer is made of transparent matte dry granules fired together. The chemical composition of the transparent matte dry granules, by weight percentage, includes: Al2O3 15-20%, SiO2 50-55%, CaO 2-5%, K2O 2-5%, Na2O 2-5%, BaO 5-15%, ZnO 2-5%, and SrO 2-5%.

5. The ceramic tile according to claim 4, characterized in that, The transparent matte dry granules have a particle size of 200-300 mesh.

6. The ceramic tile according to claim 1, characterized in that, The raw materials for preparing the base glaze layer include, by weight: 10-20 parts of sodium feldspar, 20-30 parts of potassium feldspar, 5-15 parts of nepheline, 5-10 parts of washed clay, 10-30 parts of quartz, 10-20 parts of alumina, 1-10 parts of wollastonite, and 5-20 parts of zirconium silicate.

7. A method for preparing ceramic tiles as described in any one of claims 1 to 6, characterized in that, Includes the following steps: A base glaze and an intermediate glaze are applied sequentially to the ceramic body, followed by inkjet printing of patterns and digital micro-carving ink, and then a protective glaze is applied, forming a base glaze layer, an intermediate glaze layer, a pattern layer, a digital micro-carving ink layer, and a protective glaze layer in sequence. After drying, the ceramic brick is fired in a kiln to obtain the ceramic brick.

8. The method for preparing ceramic bricks according to claim 7, characterized in that, The intermediate glaze is applied by pouring; and / or the specific gravity of the intermediate glaze is 1.85-1.94 g / cm³. 3 Glazing amount is 500-1000g / m 2 .

9. The method for preparing ceramic bricks according to claim 7, characterized in that, The printing yield of the digital micro-engraving ink is 30-75 g / m³. 2 .

10. The method for preparing ceramic bricks according to claim 7, characterized in that, The firing temperature is 1160-1220℃, and the firing cycle is 40-80 minutes.

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