Imitation-point decorative craft porcelain tile and preparation method thereof

Abstract

The invention belongs to the technical field of architectural ceramics, and relates to a jade-imitating decorative craft porcelain tile and a preparation method thereof. The ceramic tile comprises a green body, a ground glaze layer, an imitation jade decorative glaze layer, a three-dimensional decorative glaze layer and a protective glaze layer which are arranged in sequence. According to the ceramic tile, through the multi-layer glaze compounding and quaternary color development system, the decorative effect similar to the spot can be formed on the surface of the ceramic tile, and the ceramic tile has the advantages of being bright in color, soft in gloss, high in stereoscopic impression, simple in process and suitable for industrial production.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of architectural ceramics, and particularly relates to a point-citrus-imitating decorative process porcelain tile and a preparation method thereof. BACKGROUND

[0002] Point-citrus, as one of the traditional gold and silver jewelry making processes in China, is to inlay the feathers of a kingfisher on the surface of gold and silver products to form a decorative effect with bright colors and soft luster. The point-citrus process has a long history and unique artistic value. However, due to the scarcity of kingfisher feathers and the limitations of the acquisition method, the traditional point-citrus process is facing resource shortage and environmental problems, and it is difficult to be applied on a large scale in the modern decoration field.

[0003] In recent years, ceramic decoration technology has made significant progress, and various antique decoration processes have emerged, such as inkjet printing, underglaze color, and in-glaze color. These processes have enriched the means of ceramic decoration to some extent, but there are still many shortcomings in simulating the point-citrus effect. From the color perspective, the existing processes cannot accurately adjust the unique blue-green tone of point-citrus, and the color brightness is obviously insufficient, which cannot restore the unique and rich color charm of point-citrus. In terms of texture, it lacks three-dimensionality and luster, and it is difficult to show the agility and level of feathers in the point-citrus process. From the process feasibility, some processes are complex and tedious, involving multiple fine processes, which not only increases the production cost, but also has high requirements for production equipment and technical personnel, making it difficult to achieve large-scale industrial production.

[0004] Therefore, developing a porcelain tile that can efficiently simulate the point-citrus decoration effect and its preparation method has become an important issue to be solved in the field of ceramic decoration, which has important market value and cultural significance for the inheritance and innovation of traditional processes and the satisfaction of the demand for special decorative materials in the modern market. SUMMARY

[0005] The present application aims to solve the problem of inefficient simulation of point-citrus decoration effect in the prior art, and provides a point-citrus-imitating decorative process porcelain tile and a preparation method thereof. The method can form a decoration effect similar to point-citrus on the surface of the porcelain tile through multi-layer glaze composition and a four-component color development system, has bright colors, soft luster, and strong three-dimensionality, and the process is simple and suitable for industrial production.

[0006] In a first aspect, the present application provides a point-citrus-imitating decorative process porcelain tile. The point-citrus-imitating decorative process porcelain tile comprises a body, a bottom glaze layer, a point-citrus-imitating decorative glaze layer, a three-dimensional decorative glaze layer, and a protective glaze layer arranged in sequence.

[0007] Preferably, the mineral composition of the imitation black enamel includes, in parts by weight, zirconium silicate 5-10 parts, cobalt oxide 0.5-1.5 parts, copper oxide 0.5-1 part, praseodymium yellow 2-5 parts, cerium oxide 1-2 parts, kaolin 10-15 parts, diatomite 2-5 parts, and quartz 10-15 parts.

[0008] Preferably, the mineral composition of the three-dimensional decorative enamel includes, in parts by weight, blue colorant 10-20 parts, green colorant 15-25 parts, transparent frit A 20-30 parts, pearl powder 5-10 parts, and mica powder 5-10 parts; wherein the chemical composition of the transparent frit A includes, in percentage by mass, SiO2 50-55%, Al2O3 14-18%, Fe2O3 0.05-0.15%, CaO 4-6%, MgO 1-2%, K2O 3-5%, Na2O 3-5%, ZnO 8-11%, and SrO 5-7%. For example, the chemical composition of the transparent frit A includes, in percentage by mass, SiO2 52.8%, Al2O3 16.62%, Fe2O3 0.09%, CaO 5.16%, MgO 1.63%, K2O 4.28%, Na2O 3.59%, ZnO 9.34%, and SrO 6.49%.

[0009] Preferably, the chemical composition of the protective glaze comprises, in mass percentage, SiO2 45-50%, Al2O3 18-22%, Fe2O3 0.1-0.2%, TiO2 0.2-0.3%, CaO 4-6%, MgO 1.5-2.5%, K2O 1-2%, Na2O 3-4%, ZnO 4-6%, BaO 7-9%, loss on ignition 8-10%; preferably, the mineral composition of the protective glaze comprises, in parts by weight, potassium feldspar 10-18 parts, sodium feldspar 40-50 parts, washed ball clay 5-10 parts, wollastonite 10-15 parts, quartz 6-12 parts, zinc oxide 3-6 parts, transparent frit B 15-25 parts; wherein the chemical composition of the transparent frit B comprises, in mass percentage, SiO2 45-55%, Al2O3 15-20%, Fe2O3 0.1-0.3%, TiO2 0.1-0.3%, CaO 2-10%, MgO 1-5%, K2O 1-5%, Na2O 2-10%, ZnO 1-5%, BaO 10-20%. For example, the chemical composition of the transparent frit B comprises, in mass percentage, SiO2 51.58%, Al2O3 18.4%, Fe2O3 0.11%, TiO2 0.13%, CaO 5.66%, MgO 2.16%, K2O 1.92%, Na2O 4.56%, ZnO 1.64%, BaO 13.84%.

[0010] Preferably, the chemical composition of the base glaze comprises, in mass percentage, SiO2 55-60%, Al2O3 25-30%, Fe2O3 0.05-0.2%, TiO2 0.1-0.3%, CaO 0.5-1%, MgO 0.1-0.3%, K2O 3-5%, Na2O 2-3%, ZrO2 4-6%, loss on ignition 1-2%; preferably, the mineral composition of the base glaze comprises, in parts by weight, potassium feldspar 30-40 parts, sodium feldspar 15-25 parts, calcined kaolin 5-10 parts, washed ball clay 7-15 parts, quartz 6-12 parts, calcined talc 2-5 parts, aluminum oxide 10-15 parts, zirconium silicate 5-9 parts.

[0011] In a second aspect, the application provides a preparation method of the imitation point turquoise decorative process porcelain tile. The preparation method comprises: applying a base glaze on a body surface; printing a color ink pattern on the body surface after the base glaze is applied; applying an imitation point turquoise decorative glaze on the body surface after the color ink pattern is printed by using a first screen printing plate; applying a three-dimensional decorative glaze on the body surface after the imitation point turquoise decorative glaze is applied by using a second screen printing plate; applying a protective glaze on the body surface after the three-dimensional decorative glaze is applied; and firing the body after the protective glaze is applied to obtain the imitation point turquoise decorative process porcelain tile.

[0012] Preferably, a high-middle gray pattern texture in the design pattern is extracted to make the first screen printing plate; a high gray pattern texture in the design pattern is extracted to make the second screen printing plate; the sum of the gray values of each color with a high-middle gray value is greater than 30%; and the sum of the gray values of each color with a high gray value is greater than 60%.

[0013] Preferably, the base glaze is applied by glaze pouring; preferably, the specific gravity of the base glaze is 1.85-1.87 g / cm 3 , and the glaze application amount is 400-500 g / m 2 .

[0014] Preferably, the specific gravity of the imitation point turquoise decorative glaze is 1.6-1.65 g / cm 3 , and the glaze application amount is 5-10 g / m 2 .

[0015] Preferably, the specific gravity of the three-dimensional decorative glaze is 1.7-1.75 g / cm 3 , and the glaze application amount is 15-30 g / m 2 .

[0016] Preferably, the protective glaze is applied by glaze spraying; preferably, the specific gravity of the protective glaze is 1.30-1.32 g / cm 3 , and the glaze application amount is 200-250 g / m 2 .

[0017] Preferably, the firing temperature is 1190-1205 DEG C, and the firing time is 47-56 minutes.

[0018] The application has the following beneficial effects 1. The application designs a special imitation point turquoise decorative glaze formula, introduces praseodymium yellow, cerium oxide, cobalt oxide and copper oxide into the glaze to form a four-component color developing system, can form a blue-green gradient color tone and luster similar to point turquoise on the surface of the porcelain tile, has bright colors and soft luster, and has high artistic value.

[0019] 2. The application also designs a special three-dimensional decorative glaze formula, through the superimposed effect of the imitation point-cerulean decorative glaze layer and the three-dimensional decorative glaze layer, and the introduction of pearl powder and mica powder in the three-dimensional decorative glaze layer, the micro level of the point-cerulean process is simulated, and the product is endowed with remarkable visual effect and artistic quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a brick surface effect drawing of a different design version of the brick prepared in Example 1 of the application; Figure 2 is a black and white bitmap of the first screen of Example 1 of the application; Figure 3 is a black and white bitmap of the second screen of Example 1 of the application. DETAILED DESCRIPTION

[0021] The application will be further described by the following examples, which should be understood as merely illustrative of the application, rather than limiting the application. For better illustrating the purpose, technical scheme and advantages of the application, the application will be further described in conjunction with specific examples. In the case where the application is not specifically described, each percentage refers to mass ratio. The imitation point-cerulean decorative process ceramic tile and the preparation method thereof are exemplarily described below.

[0022] The imitation point-cerulean decorative process ceramic tile comprises a body, a base glaze layer, an imitation point-cerulean decorative glaze layer, a three-dimensional decorative glaze layer and a protective glaze layer arranged in sequence.

[0023] The body material can adopt the existing conventional body powder. It should be understood that any chemical composition and / or mineral composition of the body raw material commonly used in the field of building ceramics is suitable for the application. In an optional embodiment, the chemical composition of the body comprises, in mass percentage, SiO2 60-80%, Al2O3 15-20%, Fe2O3 0.1-0.3%, TiO2 0.1-0.3%, CaO 0.5-2%, MgO 0.5-2%, K2O 1-5%, Na2O 1-5%, loss on ignition 2-10%. As an example, the chemical composition of the body comprises, in mass percentage, SiO2 70.32%, Al2O3 18.63%, Fe2O3 0.18%, TiO2 0.22%, CaO 0.69%, MgO 0.81%, K2O 2.77%, Na2O 1.89%, loss on ignition 4.49%.

[0024] The body powder is pressed into shape to obtain the body. The body is dried. The moisture content of the dried body can be less than 0.4wt%.

[0025] A base glaze is applied on the surface of the dried body. A conventional base glaze in the art can be used. In an optional embodiment, the chemical composition of the base glaze comprises, in mass percentage, SiO255%-60%, Al2O325%-30%, Fe2O30.05%-0.2%, TiO20.1%-0.3%, CaO 0.5%-1%, MgO 0.1%-0.3%, K2O 3%-5%, Na2O 2%-3%, ZrO24%-6%, loss on ignition 1%-2%. For example, the chemical composition of the base glaze comprises, in mass percentage, SiO258.14%, Al2O328.15%, Fe2O30.12%, TiO20.21%, CaO 0.71%, MgO 0.18%, K2O 3.87%, Na2O 2.49%, ZrO24.48%, loss on ignition 1.65%. It should be understood that any mineral composition of the base glaze that makes the chemical composition of the base glaze fall within the above ranges is suitable for the present application.

[0026] In an optional embodiment, the mineral composition of the base glaze comprises, in parts by weight, potassium feldspar 30-40 parts, sodium feldspar 15-25 parts, calcined kaolin 5-10 parts, washed ball clay 7-15 parts, quartz 6-12 parts, calcined talc 2-5 parts, alumina 10-15 parts, zirconium silicate 5-9 parts. The zirconium silicate can be ultra-fine zirconium silicate with a particle size of 100-300 nm. By introducing ultra-fine zirconium silicate as an opacifying agent, the base color and defects of the body are hidden, while the color brightness of the imitation point turquoise material is ensured, providing a good foundation for the imitation point turquoise decoration process. For example, the mineral composition of the base glaze comprises, in parts by weight, potassium feldspar 36 parts, sodium feldspar 16 parts, calcined kaolin 7 parts, washed ball clay 9 parts, quartz 9 parts, calcined talc 3 parts, alumina 13 parts, zirconium silicate 7 parts.

[0027] The raw materials are weighed according to the mineral composition of the base glaze, water and additives are added, and the base glaze slip is obtained by ball milling. The fineness of the base glaze slip can be 0.3%-0.5% of the mass retained on a 325 mesh screen. The additives include, but are not limited to, sodium tripolyphosphate and / or sodium carboxymethyl cellulose. The mass content of the additives can be 0.3%-0.6% of the mineral composition of the base glaze. Water can be added to the base glaze slip to adjust the desired specific gravity of the base glaze slip when in use.

[0028] The base glaze can be applied by glaze spraying. The specific gravity of the base glaze is 1.85-1.87 g / cm3, and the application amount of the base glaze is 400-500 g / m2. Within the application amount range of the base glaze, the glaze layer has sufficient hiding power, and the glaze layer is not too thick, avoiding difficulties in firing or increased costs.

[0029] An inkjet pattern layer is obtained by inkjet printing a color ink pattern on the surface of the base glaze layer. The texture and color of the color ink pattern can be adapted according to the layout design.

[0030] A simulated jadeite decorative glaze is applied on the surface of the body after the color ink pattern is inkjet printed. The simulated jadeite decorative glaze compensates for the color system, brightness and gray scale that cannot be achieved by the inkjet color ink. After the simulated jadeite decorative glaze layer is added, the pattern level is more distinct.

[0031] In an optional embodiment, the mineral composition of the simulated jadeite decorative glaze includes, in parts by weight, zirconium silicate 5-10 parts, cobalt oxide 0.5-1.5 parts, copper oxide 0.5-1 part, praseodymium yellow 2-5 parts, cerium oxide 1-2 parts, kaolin 10-15 parts, diatomite 2-5 parts, and quartz 10-15 parts. For example, the mineral composition of the simulated jadeite decorative glaze includes, in parts by weight, zirconium silicate 8 parts, cobalt oxide 1.2 parts, copper oxide 0.5 parts, praseodymium yellow 4 parts, cerium oxide 1.6 parts, kaolin 12 parts, diatomite 3 parts, and quartz 12 parts.

[0032] The zirconium silicate can be ultra-fine zirconium silicate with a particle size of 100-300 nm. The ultra-fine zirconium silicate and quartz provide a carrier for the colorant. The cobalt oxide can be provided by cobalt black pigment. The praseodymium yellow pigment is a yellow pigment for ceramics using rare earth element praseodymium as the main color former, and belongs to zircon-type inorganic pigments. The main crystal phase of the praseodymium yellow pigment is zircon (ZrSiO4), and praseodymium ions (Pr 3+ ) replace part of the zirconium ions (Zr 4+ ) in the zircon crystal lattice in the form of doping to form a stable yellow crystal phase. The praseodymium yellow pigment is a commonly used pigment in the field of building ceramics, and can be obtained by commercial purchase. Through the Co-Cu-Pr-Ce four-element color development synergy, the special optical properties of natural jade feather are simulated to provide saturated decorative color brightness. Among them, cobalt oxide forms a CoAl2O4 spinel structure at high temperature, showing a stable indigo blue; copper oxide and cobalt oxide co-dissolve to form a CuO-CoO-SiO2 solid solution, forming a blue-green gradient color of jade feather; praseodymium yellow decomposes into Pr 3+ at high temperature, yellow light reflection is generated through electron transition, and a "blue with transparent gold" visual effect is formed by superimposing the blue-green matrix, and cerium oxide as a high refractive index material can improve the refractive index of the glaze surface to simulate the luster of jade feather. The kaolin-diatomite forms a "skeleton-pore" composite structure to ensure the high-temperature strength and color development uniformity of the glaze layer, and avoid the reaction between the cobalt oxide / copper oxide in the simulated jadeite decorative glaze layer and the formation of black spinel at high temperature.

[0033] In an optional embodiment, the chemical composition of the imitation point turquoise decorative glaze comprises, in mass percentage, SiO2 58% to 72%, Al2O3 7% to 13%, Fe2O3 0.05% to 0.16%, TiO2 0.05% to 0.1%, Na2O 0.6% to 1.2%, K2O 0.4% to 0.7%, CoO 0.8% to 2.2%, CuO 0.6% to 1.3%, Pr6O 11 0.3% to 0.55%, CeO2 1.5% to 3%, ZrO2 5% to 10%, loss on ignition 3% to 5%. In some embodiments, the chemical composition of the imitation point turquoise decorative glaze comprises, in mass percentage, SiO2 69.17%, Al2O3 11.64%, Fe2O3 0.13%, TiO2 0.08%, Na2O 0.94%, K2O 0.59%, CoO 1.96%, CuO 1.10%, Pr6O 11 0.43%, CeO2 2.39%, ZrO2 7.71%, loss on ignition 3.86%.

[0034] The mineral composition of the imitation point turquoise decorative glaze can be mixed with printing paste to prepare an imitation point turquoise decorative glaze slip. The printing paste serves to adjust the rheological properties of the slip and acts as a suitable medium for screen printing. In an optional embodiment, the imitation point turquoise decorative glaze slip comprises, in parts by weight, 30 to 60 parts of the mineral composition of the imitation point turquoise decorative glaze and 50 to 70 parts of printing paste. The printing paste is a conventional auxiliary agent in the field of architectural ceramics. It should be understood that the composition of the printing paste does not affect the implementation of the technical solution of the present application. By way of example but not limited thereto, the printing paste raw material comprises, in mass percentage, ethylene glycol 10% to 30%, sodium carboxymethyl cellulose 1% to 5%, and water 50% to 80%. For example, the printing paste raw material comprises, in mass percentage, ethylene glycol 24%, sodium carboxymethyl cellulose 3%, and water 73%.

[0035] The raw materials are prepared according to the mineral composition of the imitation point turquoise decorative glaze, mixed thoroughly, and then ball-milled with the printing paste until the fineness of the slip is less than 0.3% in mass residue on a 250-mesh screen.

[0036] The imitation point turquoise decorative glaze is applied by screen printing. In an optional embodiment, the specific gravity of the imitation point turquoise decorative glaze is 1.6 to 1.65 g / cm 3 , and the glazing amount is 5 to 10 g / m 2 . The imitation point turquoise decorative glaze is applied by screen printing using a first screen. The prepared imitation point turquoise decorative glaze is uniformly printed on the surface of the inkjet pattern layer through the first screen.

[0037] According to the color separation and screen printing, a first screen and a second screen are obtained. Extracting layers: open the design pattern in Photoshop, separate the layers that need to be printed with different screens. Color adjustment: ensure that the color of the first screen layer matches the color of the imitation point-curtis decorative glaze. Output the color separation file: export the black and white bitmap of the first screen and the second screen respectively. Screen preparation: clean the screen, apply the photosensitive glue and dry it. Exposure: UV exposure of the color separation pattern negative film close to the screen. Development: wash the unexposed area to form the screen holes of the printing pattern. Dry and solidify, complete the screen making.

[0038] Among them, the first screen is made by extracting the medium and high gray scale pattern texture in the design pattern, which enhances the color effect of the texture. The medium gray value refers to the sum of the gray values of each color being 30% to 60%. High gray refers to the sum of the gray values of each color being greater than 60%. For example, the first screen has a mesh of 160 mesh (thickened once), which mainly prints color glaze on the pattern texture to enhance the color effect.

[0039] Apply a three-dimensional decorative glaze on the imitation point-curtis decorative glaze layer. The role of the three-dimensional decorative glaze is to highlight the multi-level effect, increase the gloss and enhance the three-dimensional effect, improve the product grade, and make the overall decorative effect more vivid and realistic.

[0040] In an optional embodiment, the mineral composition of the three-dimensional decorative glaze includes: 10-20 parts by weight of blue pigment, 15-25 parts by weight of green pigment, 20-30 parts by weight of transparent frit A, 5-10 parts by weight of pearl powder, and 5-10 parts by weight of mica powder. For example, the chemical composition of the three-dimensional effect glaze includes: 16 parts by weight of blue pigment, 20 parts by weight of green pigment, 22 parts by weight of transparent frit A, 10 parts by weight of pearl powder, and 7 parts by weight of mica powder.

[0041] The blue pigment is preferably in the form of frit. In an optional embodiment, the blue frit is mainly CoAl2O4 pigment system, which melts to form blue color dots at high temperature. The green pigment is preferably in the form of frit. In an optional embodiment, the green frit is mainly chromium green pigment, which co-melts with the blue frit to form blue-green gradient texture at high temperature. The system of the chromium green pigment can be Cr2O3-ZnO-Al2O3 system.

[0042] In an optional embodiment, the chemical composition of the transparent frit A comprises, in mass percentage, SiO2 50%~55%, Al2O3 14%~18%, Fe2O3 0.05%~0.15%, CaO 4%~6%, MgO 1%~2%, K2O 3%~5%, Na2O 3%~5%, ZnO 8%~11%, SrO 5%~7%. For example, the chemical composition of the transparent frit A comprises, in mass percentage, SiO2 52.8%, Al2O3 16.62%, Fe2O3 0.09%, CaO 5.16%, MgO 1.63%, K2O 4.28%, Na2O 3.59%, ZnO 9.34%, SrO 6.49%. The main role of the transparent frit A is to form the convex profile and construct the three-dimensional texture.

[0043] The pearl powder generates perovskite reflective crystals after high-temperature decomposition, and can produce metal-like flashes. The pearl powder is a commonly used material in the field of architectural ceramics. In an optional embodiment, the chemical composition of the pearl powder comprises, in mass percentage, CaO 90%~94%, TiO2 0.5%~0.8%, loss on ignition 6%~10%.

[0044] In an optional embodiment, the mica powder is a flaky sericite with an aspect ratio > 50. The mica is directionally arranged at high temperature to produce interference iridescence, simulating the "green flash with gold" effect of the emerald feather.

[0045] In an optional embodiment, the chemical composition of the three-dimensional effect glaze comprises, in mass percentage, SiO2 50%~65%, Al2O3 11%~16%, Fe2O3 0.05%~0.1%, TiO2 0.15%~0.25% 、 CaO 5%~8%, MgO 1.5%~2.5%, K2O 3%~5%, Na2O 2.5%~4%, ZnO 3%~5%, SrO 2%~3.5%, CoO 0.2%~0.6%, Cr2O3 0.4%~0.8%, loss on ignition 1%~2%.

[0046] The mineral composition of the three-dimensional decorative glaze can be mixed with the printing paste to prepare a three-dimensional decorative glaze slip. The role of the printing paste is to adjust the rheological properties of the glaze slip and act as a screen printing adaptation medium. In an optional embodiment, the three-dimensional decorative glaze slip comprises, in parts by weight, 55~95 parts of the mineral composition of the three-dimensional decorative glaze and 30~50 parts of the printing paste. The printing paste is a conventional additive in the field of architectural ceramics. It should be understood that the composition of the printing paste does not affect the implementation of the technical solutions of the present application. As an example but not limited to, the printing paste raw materials comprise, in mass percentage, ethylene glycol 10%~30%, sodium carboxymethyl cellulose 1%~5%, and water 50%~80%. For example, the printing paste raw materials comprise, in mass percentage, ethylene glycol 24%, sodium carboxymethyl cellulose 3%, and water 73%.

[0047] The raw materials are mixed thoroughly and then added to the printing paste for ball milling until the slip fineness is less than 0.3% of the mass residue on a 250 mesh screen.

[0048] The application method of the three-dimensional decorative glaze is screen printing. In an optional embodiment, the specific gravity of the three-dimensional decorative glaze is 1.7-1.75 g / cm 3 , and the glazing amount is 15-30 g / m 2 .

[0049] The three-dimensional decorative glaze is applied by screen printing using a second screen. The contour of the high gray scale pattern texture of the design pattern is extracted to make the second screen, thereby improving the level effect of the product. The high gray scale refers to the sum of the gray scale values of each color being greater than 60%. The prepared three-dimensional decorative glaze is printed on the surface of the imitation point-copper decorative glaze layer on the second screen. In an optional embodiment, the 80 mesh (thickened twice) of the second screen is mainly used to print the convex glaze on the pattern texture or the edge, thereby enhancing the three-dimensional effect.

[0050] It is not feasible to exchange the glazing order of the imitation point-copper decorative glaze and the three-dimensional decorative glaze. The functions of the imitation point-copper decorative glaze and the three-dimensional decorative glaze are different. If the screen order is not changed, i.e., the three-dimensional decorative glaze is printed using the first screen and the imitation point-copper decorative glaze is printed using the second screen, the imitation point-copper decorative glaze cannot form a three-dimensional texture and cannot show fine color texture due to the influence of the second screen, thereby causing the product to be a lump and affecting the appearance of the product. If the screen and the glaze layer are exchanged at the same time, i.e., the three-dimensional decorative glaze layer is printed using the second screen and the imitation point-copper decorative glaze is printed using the first screen, the gloss of the three-dimensional decorative glaze will be completely covered, and the imitation point-copper decorative glaze is difficult to print on the three-dimensional decorative glaze (uneven), thereby failing to take into account the color and gloss and the three-dimensional effect.

[0051] A protective glaze is applied on the surface of the body after the three-dimensional decorative glaze is applied. The protective glaze covers the surface of the three-dimensional decorative layer to protect the decorative texture and prevent wear and tear and discoloration. A conventional protective glaze in the art can be used.

[0052] In an optional embodiment, the chemical composition of the protective glaze includes, in terms of mass percentage, SiO245%-50%, Al2O318%-22%, Fe2O30.1%-0.2%, TiO20.2%-0.3%, CaO 4%-6%, MgO 1.5%-2.5%, K2O 1%-2%, Na2O 3%-4%, ZnO 4%-6%, BaO 7%-9%, and loss on ignition 8%-10%. It should be understood that any protective glaze mineral composition that causes the chemical composition of the protective glaze to fall within the above ranges is suitable for the present application.

[0053] In an optional embodiment, the mineral composition of the protective glaze includes, by weight, 10-18 parts potassium feldspar, 40-50 parts sodium feldspar, 5-10 parts washed clay, 10-15 parts wollastonite, 6-12 parts quartz, 3-6 parts zinc oxide, and 15-25 parts transparent frit B.

[0054] In an optional embodiment, the chemical composition of the transparent frit B includes, by mass percentage: SiO2 45%~55%, Al2O3 15%~20%, Fe2O3 0.1%~0.3%, TiO2 0.1%~0.3%, CaO 2%~10%, MgO 1%~5%, K2O 1%~5%, Na2O 2%~10%, ZnO 1%~5%, and BaO 10%~20%. For example, the chemical composition of the transparent frit B includes, by mass percentage: SiO2 51.58%, Al2O3 18.4%, Fe2O3 0.11%, TiO2 0.13%, CaO 5.66%, MgO 2.16%, K2O 1.92%, Na2O 4.56%, ZnO 1.64%, and BaO 13.84%.

[0055] Weigh all raw materials according to the mineral composition of the protective glaze, add water and additives, and ball mill until homogeneous to obtain a protective glaze slurry. The fineness of the protective glaze slurry is such that the mass residue passing through a 325-mesh sieve is 0.2%~0.4%. The additives include, but are not limited to, sodium tripolyphosphate and / or sodium carboxymethyl cellulose. The mass content of the additives can be 0.3%~0.6% of the mineral composition of the protective glaze. Water can be added to the protective glaze slurry during use to adjust it to the desired specific gravity.

[0056] The protective glaze can be applied by spraying. The specific gravity of the protective glaze is 1.30~1.32 g / cm³. 3 The glaze application rate is 200~250 g / m². 2 Within the range of the protective glaze application amount, the product achieves optimal gloss and texture, avoiding excessive or insufficient application that could affect the glaze's transparency or abrasion resistance.

[0057] Firing. The unglazed body with the applied three-dimensional decorative glaze is placed in a roller kiln for firing. The firing temperature is 1190~1205℃, and the firing time is 47~56 minutes.

[0058] Edge grinding.

[0059] In summary, the imitation point-Cui decorative process porcelain tile realizes the industrial production of imitation point-Cui effect porcelain tile through multi-layer glaze composition and multi-element color system. The porcelain tile has the imitation point-Cui decorative effect with fine level and three-dimensional sense on the surface, rich and varied color, good gloss, and high artistic aesthetic value and practical value. Moreover, the preparation method is simple, suitable for industrial production, can effectively reduce the production cost, and improve the market competitiveness. The imitation point-Cui decorative process porcelain tile can be used in the fields of building decoration, home decoration, artistic background wall, and has wide application prospect.

[0060] The following further illustrates the embodiments to further illustrate the present application. It should also be understood that the following embodiments are only used to further illustrate the present application, and cannot be understood as limiting the protection scope of the present application. Some non-essential improvements and adjustments made by the person skilled in the art according to the above content of the present application all belong to the protection scope of the present application. The specific process parameters in the following examples are only one example in the appropriate range, that is, the person skilled in the art can select in the appropriate range through the description herein, and not limited to the specific values of the following examples.

[0061] Example 1

[0062] The preparation method of the imitation point-Cui decorative process porcelain tile comprises the following steps: S1, preparing a body. The chemical composition of the body comprises: SiO2 70.32%, Al2O3 18.63%, Fe2O3 0.18%, TiO2 0.22%, CaO 0.69%, MgO 0.81%, K2O 2.77%, Na2O 1.89% by mass percentage, and loss on ignition 4.49%.

[0063] S2, applying a base glaze on the surface of the body. The mineral composition of the base glaze comprises: potassium feldspar 36 parts, sodium feldspar 16 parts, calcined kaolin 6 parts, water-washed ball clay 9 parts, quartz 9 parts, burned talc 3 parts, alumina 13 parts, and zirconium silicate 8 parts by weight. The chemical composition of the base glaze comprises: SiO2 57.46%, Al2O3 28.23%, Fe2O3 0.12%, TiO2 0.21%, CaO 0.57%, MgO 0.15%, K2O 4.31%, Na2O 2.47%, ZrO2 4.81%, and loss on ignition 1.67% by mass percentage. The base glaze is applied by glaze spraying. The specific gravity of the base glaze is 1.86 g / cm 3 , and the glaze application amount is 420 g / m 2 .

[0064] S3, inkjet printing color ink pattern on the surface of the body after the application of the base glaze. Then, the layer of the inkjet printing design pattern is extracted by Photoshop software, color separation is carried out to obtain a color separation effect net, and the color separation effect picture is exposed to obtain a first screen and a second screen respectively. The high and medium gray pattern texture in the design pattern is extracted to make the first screen. The high and medium gray value refers to the sum of the gray values of each color being greater than 30%. The (peripheral) contour of the high gray pattern texture in the design pattern is extracted to make the second screen. The high gray refers to the sum of the gray values of each color being greater than 60%.

[0065] S4, applying imitation point-cerulean decorative glaze on the surface of the body after inkjet printing color ink pattern by screen printing using the first screen. The mineral composition of the imitation point-cerulean decorative glaze includes: zirconium silicate 6 parts, cobalt oxide 0.8 parts, copper oxide 0.7 parts, praseodymium yellow 3 parts, cerium oxide 1.2 parts, kaolin 10 parts, diatomite 4 parts, quartz 12 parts by weight. The chemical composition of the imitation point-cerulean decorative glaze includes: SiO2 71.83%, Al2O3 11.96%, Fe2O3 0.11%, TiO2 0.07%, Na2O 1.07%, K2O 0.55%, CoO 1.25%, CuO 1.1%, Pr6O0.31%, CeO2 1.89%, ZrO2 5.92%, loss on ignition 3.94% by mass percent. The specific gravity of the imitation point-cerulean decorative glaze is 1.6 g / cm 11 , and the glaze application amount is 10 g / m 3 . 2 .

[0066] S5, applying three-dimensional decorative glaze on the surface of the body after applying imitation point-cerulean decorative glaze by screen printing using the second screen. The mineral composition of the three-dimensional decorative glaze includes: blue colorant 12 parts, green colorant 18 parts, transparent frit A 23 parts, pearl powder 5 parts, mica powder 7 parts. The chemical composition of the transparent frit A includes: SiO2 52.8%, Al2O3 16.62%, Fe2O3 0.09%, CaO 5.16%, MgO 1.63%, K2O 4.28%, Na2O 3.59%, ZnO 9.34%, SrO 6.49% by mass percent. The chemical composition of the three-dimensional effect glaze includes: SiO2 63.63%, Al2O3 11.82%, Fe2O3 0.09%, TiO2 0.18%, CaO 6.37%, MgO 1.59%, K2O 4.58%, Na2O 3.11%, ZnO 3.96%, SrO 2.12%, CoO 0.35%, Cr2O3 0.53%, loss on ignition 1.67% by mass percent. The specific gravity of the three-dimensional decorative glaze is 1.75 g / cm 3 , and the glaze application amount is 25 g / m 2 .

[0067] S6, the body surface after the application of the stereoscopic decorative glaze is applied with a protective glaze. The mineral composition of the protective glaze includes, in parts by weight, potassium feldspar 13 parts, sodium feldspar 40 parts, water-washed ball clay 9 parts, wollastonite 10 parts, quartz 7 parts, zinc oxide 4 parts, and transparent frit B 17 parts. The chemical composition of the transparent frit B includes, in percentage by mass, SiO2 51.58%, Al2O3 18.4%, Fe2O3 0.11%, TiO2 0.13%, CaO 5.66%, MgO 2.16%, K2O 1.92%, Na2O 4.56%, ZnO 1.64%, and BaO 13.84%. The chemical composition of the protective glaze includes, in percentage by mass, SiO2 46.97%, Al2O3 18.12%, Fe2O3 0.16%, TiO2 0.24%, CaO 4.74%, MgO 2.02%, K2O 1.23%, Na2O 3.59%, ZnO 4.54%, BaO 8.53%, and loss on ignition 9.86%. The protective glaze is applied by spraying. The specific gravity of the protective glaze is 1.30 g / cm3, and the glaze application amount is 200 g / m2. 3 2 .

[0068] S7, the body after the application of the protective glaze is fired. The firing is performed in a roller kiln. The firing temperature is 1201℃, and the firing time is 51 minutes.

[0069] S8, edge grinding.

[0070] Figure 1 is a brick surface effect drawing with different design patterns prepared according to Embodiment 1 of the present application. A blue-green gradient color tone similar to point jade and a luster are formed on the surface of the ceramic tile, and the color is bright and the luster is soft.

[0071] The abrasion resistance is 2100 revolutions, and the grade is 4 according to the detection method of GB / T 3810.7. The stain resistance is grade 5 according to the detection scheme of GB / T 3810.14. The results show that the glaze surface of the embodiment is qualified in the abrasion resistance and stain resistance tests.

[0072] Embodiment 2

[0073] S4, the mineral composition of the point jade imitation decorative glaze includes, in parts by weight, zirconium silicate 7 parts, cobalt oxide 1 part, copper oxide 0.6 part, praseodymium yellow 4 parts, cerium oxide 1 part, kaolin 13 parts, diatomite 4 parts, and quartz 11 parts.

[0074] S5, the mineral composition of the stereoscopic decorative glaze includes, in parts by weight, blue colorant 10 parts, green colorant 22 parts, transparent frit A 20 parts, pearl powder 10 parts, and mica powder 6 parts.

[0075] ​The embodiment adjusts the formula of the imitation point turquoise decorative layer and the three-dimensional decorative layer, and further optimizes the decorative effect.

[0076] Embodiment 3

[0077] The embodiment is basically the same as embodiment 1, and the difference is only that: S4, the mineral composition of the imitation point turquoise decorative glaze includes, by weight, 8 parts of zirconium silicate, 1.2 parts of cobalt oxide, 0.8 parts of copper oxide, 4.5 parts of praseodymium yellow, 1 part of cerium oxide, 15 parts of kaolin, 4 parts of diatomite, and 10 parts of quartz. The specific gravity of the imitation point turquoise decorative glaze is 1.65 g / cm 3 , and the glazing amount is 10 g / m 2 .

[0078] S6, the protective glaze is applied by spraying. The specific gravity of the protective glaze is 1.32 g / cm 3 , and the glazing amount is 250 g / m 2 .

[0079] S7, the firing temperature is 1205℃, and the firing time is 50 minutes.

[0080] The embodiment further adjusts the formula of the imitation point turquoise decorative glaze layer and optimizes the glazing parameters of the protective glaze to further improve the decorative effect and the comprehensive performance of the product.

[0081] Comparative Example 1 The embodiment is basically the same as embodiment 1, and the difference is only that: the process of applying the imitation point turquoise decorative glaze layer and the three-dimensional decorative layer is omitted.

[0082] The comparative example adopts the traditional inkjet printing process, does not apply the imitation point turquoise decorative glaze layer and the three-dimensional decorative layer, and only applies the base glaze, inkjet printing, and protective glaze for firing and edge grinding. The results show that the traditional process cannot achieve the blue-green tone and luster similar to point turquoise, and the decorative effect is single and lacks three-dimensionality, which is obviously different from the present application.

[0083] Comparative Example 2 The embodiment is basically the same as embodiment 1, and the difference is only that: the mineral composition of the imitation point turquoise decorative glaze includes, by weight, 6 parts of zirconium silicate, 0.8 parts of cobalt oxide, 0.7 parts of copper oxide, 10 parts of kaolin, 4 parts of diatomite, and 12 parts of quartz.

[0084] The comparative example only uses a binary color developing system of cobalt oxide and copper oxide in the imitation point turquoise decorative glaze layer without adding praseodymium yellow and cerium oxide. The results show that the color brightness and luster of the decorative effect are obviously insufficient, and the “blue with golden light” effect similar to point turquoise cannot be achieved, which is significantly different from the rich and varied decorative effect with soft luster formed by the four-element color developing system of the present application.

[0085] Comparative Example 3 The same as example 1, the difference is that the mineral composition of the imitation point turquoise decorative glaze includes: 6 parts of zirconium silicate, 3 parts of praseodymium yellow, 1.2 parts of cerium oxide, 10 parts of kaolin, 4 parts of diatomite, and 12 parts of quartz.

[0086] The comparative example only uses a binary color developing system of praseodymium yellow and cerium oxide in the imitation point turquoise decorative glaze layer without adding cobalt oxide and copper oxide. The results show that the decorative glaze using the binary color developing system forms a yellow-green color on the surface of the ceramic tile, which lacks the unique blue-green tone and metallic luster in the traditional point turquoise process. The overall decorative effect appears relatively flat, and lacks visual depth and three-dimensionality. In addition, when the addition ratio of cobalt oxide or copper oxide is low, the gradual blue-green tone in the decorative effect is not good, further verifying the importance of the four-component color developing system of the present application in forming rich colors and luster texture.

[0087] Comparative example 4 The same as example 1, the difference is that the mineral composition of the imitation point turquoise decorative glaze includes: 6 parts of zirconium silicate, 0.8 parts of cobalt oxide, 0.7 parts of copper oxide, 3 parts of praseodymium yellow, 1.2 parts of cerium oxide, and 12 parts of quartz.

[0088] The comparative example removes kaolin and diatomite in the imitation point turquoise decorative glaze layer. The experimental results show that after removing kaolin and diatomite, black spinel is generated in the imitation point turquoise decorative glaze layer, which seriously affects the decorative effect. The generation of black spinel not only destroys the color and luster of the decorative layer, but also may cause the adhesion between the decorative layer and the ceramic tile substrate to decrease, thereby affecting the overall quality and durability of the product.

[0089] Comparative example 5 The same as example 1, the difference is that the mineral composition of the three-dimensional decorative glaze includes: 12 parts of blue colorant, 18 parts of green colorant, and 23 parts of transparent frit A.

[0090] The comparative example does not add pearl powder and mica powder in the three-dimensional decorative layer, but only uses blue colorant, green colorant, and transparent frit. The results show that the decorative effect lacks luster and iridescence, and cannot simulate the “green with golden flash” effect of the jade feather, and the overall decorative effect appears relatively monotonous and flat.

[0091] Comparative example 6 The same as example 1, the difference is that the process of applying a protective glaze is omitted.

[0092] The abrasion resistance is 750 revolutions, 3 levels according to the detection method of GB / T 3810.7; and the side stain resistance is level 2 according to the detection scheme of GB / T 3810.14. The results show that the glaze surface of the comparative example is not qualified in the abrasion resistance and stain resistance tests, and cannot effectively protect the decorative texture.

[0093] The application is not limited to the above examples, which can be modified or adapted by a person of ordinary skill in the art in the light of the above description, all such modifications and adaptations being intended to fall within the scope of the application as defined by the claims appended hereto.

Claims

1. An imitation jade decorated process porcelain tile, characterized in that, The imitation point turquoise decorative process porcelain tile comprises a body, a bottom glaze layer, an imitation point turquoise decorative glaze layer, a three-dimensional decorative glaze layer and a protective glaze layer arranged in sequence.

2. The imitation jade decorative process porcelain tile according to claim 1, characterized in that, The mineral composition of the imitation point turquoise decorative glaze comprises, in parts by weight, zirconium silicate 5-10 parts, cobalt oxide 0.5-1.5 parts, copper oxide 0.5-1 part, praseodymium yellow 2-5 parts, cerium oxide 1-2 parts, kaolin 10-15 parts, diatomite 2-5 parts and quartz 10-15 parts.

3. The imitation jade decorative process porcelain tile according to claim 1 or 2, characterized in that, The mineral composition of the three-dimensional decorative glaze comprises, in parts by weight, blue pigment 10-20 parts, green pigment 15-25 parts, transparent frit A 20-30 parts, pearl powder 5-10 parts and mica powder 5-10 parts; wherein the chemical composition of the transparent frit A comprises, in percentage by mass, SiO2 50%-55%, Al2O3 14%-18%, Fe2O3 0.05%-0.15%, CaO 4%-6%, MgO 1%-2%, K2O 3%-5%, Na2O 3%-5%, ZnO 8%-11% and SrO 5%-7%.

4. The imitation jade decorative process porcelain tile according to any one of claims 1 to 3, characterized in that, The chemical composition of the protective glaze comprises, in percentage by mass, SiO2 45%-50%, Al2O3 18%-22%, Fe2O3 0.1%-0.2%, TiO2 0.2%-0.3%, CaO 4%-6%, MgO 1.5%-2.5%, K2O 1%-2%, Na2O 3%-4%, ZnO 4%-6%, BaO 7%-9% and loss on ignition 8%-10%; preferably, the mineral composition of the protective glaze comprises, in parts by weight, potassium feldspar 10-18 parts, sodium feldspar 40-50 parts, washed ball clay 5-10 parts, wollastonite 10-15 parts, quartz 6-12 parts, zinc oxide 3-6 parts and transparent frit B 15-25 parts; wherein the chemical composition of the transparent frit B comprises, in percentage by mass, SiO2 45%-55%, Al2O3 15%-20%, Fe2O3 0.1%-0.3%, TiO2 0.1%-0.3%, CaO 2%-10%, MgO 1%-5%, K2O 1%-5%, Na2O 2%-10%, ZnO 1%-5% and BaO 10%-20%.

5. The imitation jade decorative process porcelain tile according to any of claims 1 to 4, characterized in that, The chemical composition of the bottom glaze comprises, in percentage by mass, SiO2 55%-60%, Al2O3 25%-30%, Fe2O3 0.05%-0.2%, TiO2 0.1%-0.3%, CaO 0.5%-1%, MgO 0.1%-0.3%, K2O 3%-5%, Na2O 2%-3%, ZrO2 4%-6% and loss on ignition 1%-2%; preferably, the mineral composition of the bottom glaze comprises, in parts by weight, potassium feldspar 30-40 parts, sodium feldspar 15-25 parts, calcined kaolin 5-10 parts, washed ball clay 7-15 parts, quartz 6-12 parts, burned talc 2-5 parts, aluminum oxide 10-15 parts and zirconium silicate 5-9 parts.

6. The method of manufacturing the imitation jade decorated porcelain tile according to any one of claims 1 to 5, characterized in that, The preparation method comprises the following steps: applying a base glaze on the surface of a green body; printing a color ink pattern on the surface of the green body after the base glaze is applied; applying a point imitation decoration glaze by screen printing on the surface of the green body after the color ink pattern is printed by inkjet printing, using a first screen; applying a three-dimensional decoration glaze by screen printing on the surface of the green body after the point imitation decoration glaze is applied, using a second screen; applying a protective glaze on the surface of the green body after the three-dimensional decoration glaze is applied; and firing the green body after the protective glaze is applied, to obtain the point imitation decoration process ceramic tile.

7. The production method according to claim 6, wherein A first screen is made by extracting a medium-high gray pattern texture in a design pattern; a second screen is made by extracting a high gray pattern texture in the design pattern; the sum of the gray values of each color of the medium-high gray value is greater than 30%; and the sum of the gray values of each color of the high gray value is greater than 60%.

8. The production method according to claim 6 or 7, characterized by, The bottom glaze is applied by spraying; preferably, the specific gravity of the bottom glaze is 1.85-1.87 g / cm 3 , and the glaze application amount is 400-500 g / m 2 .

9. The production method according to any one of claims 6 to 8, characterized by, The specific gravity of the imitation Keum-Bo decorative glaze is 1.6-1.65 g / cm 3 , and the glazing amount is 5-10 g / m 2 .

10. The production method according to any one of claims 6 to 9, characterized by, The specific gravity of the stereoscopic decorative glaze is 1.7-1.75 g / cm 3 , and the glazing amount is 15-30 g / m 2 .

11. The production method according to any one of claims 6 to 10, characterized by, The protective glaze is applied by spraying; preferably, the specific gravity of the protective glaze is 1.30-1.32 g / cm 3 , and the glaze application amount is 200-250 g / m 2 .

12. The production method according to any one of claims 6 to 11, characterized by, The firing temperature is 1190-1205 DEG C, and the firing time is 47-56 minutes.

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