Dunhuang mural stone green series ceramic rock plate and manufacturing method thereof

Abstract

The invention relates to a Dunhuang mural stone green series ceramic rock plate and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) pressing a green body; the engobe is prepared from, by weight, 6 parts of washed kaolin, 3 parts of black mud, 18 parts of glass frit, 2 parts of diopside, 2 parts of quartz powder, 4 parts of barium-based frit, 12 parts of superfine quartz powder, 15 parts of zirconium white frit, 6 parts of calcined alumina powder, 3 parts of zirconium silicate, 10 parts of potassium feldspar, 7 parts of nepheline powder, 10 parts of ball clay, 2 parts of calcined talc, 0.6 part of sodium tripolyphosphate and 0.3 part of sodium carboxymethyl cellulose; (3) inkjet printing: combining color ink with blue, blue, brown, package yellow, bright red and black; (4) spraying green promoting glaze, wherein the formula of the green promoting glaze comprises the following components in parts by weight: 32 parts of high-zinc low-temperature frit, 28 parts of fused quartz, 17 parts of quartz powder, 14 parts of white carbon black and 9 parts of kaolin; (5) applying protective glaze: selecting the surface gloss and texture of the product according to the development of green products, wherein the surface gloss and texture can be dry granular glaze, matte or bright protective glaze; and (6) high-temperature firing.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramic rock slabs, and in particular relates to a Dunhuang mural stone green ceramic rock slab and a manufacturing method thereof. Background Art

[0003] Among the elements of Dunhuang murals, turquoise green is a color that ancient art pioneers have a special liking for. Although it is not presented as the main color in the murals, against the backdrop of primary colors such as red and earth brown, turquoise green is undoubtedly a bright and beautiful color in Dunhuang mural art, making the entire picture vivid and harmonious.

[0004] However, in the field of architectural ceramics, ceramic tiles or ceramic rock slabs are usually based on white, apricot, brown, blue, red and gray. This is mainly due to the limited decorative ink channels for inkjet printing, and are generally based on blue, brown, yellow, red and black ink configurations. For this reason, green products are less developed. Even if they are developed, some green products are synthesized by mixing blue and yellow. The green products developed by this ink combination are generally impure in color, or blue or yellow, and have the pain points and difficulties of poor production stability. On the other hand, green is usually based on chromium as the origin of green pigments, and the main particle size of chromium inks is usually submicron particles. The finer the chromium-based colorant, the higher the degree of reaction with some glaze systems during the ceramic firing process, and the color becomes unstable or discolored. The stone green products of Dunhuang murals are the carriers of traditional art inheritance and dissemination, and the purity and effect of their stone green are crucial. Summary of the invention

[0005] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a solution to the problem that green products are rarely developed or the developed green products are impure in the development process of the building ceramics industry. Through the research, development and combined use of low-zirconium ultra-white cosmetic soil, cyan ceramic ink and green-promoting glaze, a Dunhuang mural stone green ceramic rock plate is prepared that can inherit the artistic charm of Dunhuang murals, take Dunhuang as the starting point, use porcelain as a bridge, engrave the soul of China, connect with the world, and continuously promote the leading role of Dunhuang culture in the global art field. Another technical problem to be solved by the present invention is to provide a high-zinc low-temperature frit that has good production stability and replaces traditional calcined zinc oxide. The high-zinc low-temperature frit is made by high-temperature melting and clarified melting. The high-temperature melting time in the preparation process is relatively long, and the reaction is relatively complete. It is a zinc glass phase material with a relatively stable internal structure. It is used in the green-promoting glaze and rarely generates Zn during the firing process. 2+ That is, it has little effect on the green color, and is also beneficial to the preparation method of Dunhuang mural stone green ceramic rock slabs with colors such as blue, brown, wrapped yellow, and bright red ink.

[0006] The technical solution of the present invention is the method for preparing the Dunhuang mural stone green ceramic rock plate, which is special in that it includes the following steps:

[0007] ⑴ Pressing the green body;

[0008] (2) Low-zirconium ultra-white cosmetic soil: The low-zirconium ultra-white cosmetic soil formula is composed of the following components by weight: 5-8 parts of washed kaolin, 2-5 parts of black mud, 15-20 parts of glass frit, 0-2 parts of diopside, 0-2 parts of quartz powder, 2-5 parts of barium-based frit, 10-15 parts of ultrafine quartz powder, 10-20 parts of zircon white frit, 6-10 parts of calcined alumina powder, 1-3 parts of zirconium silicate, 10-15 parts of potassium feldspar, 5-8 parts of nepheline powder, 10-15 parts of ball clay, 2-3 parts of burnt talc, 0.5-1 part of sodium tripolyphosphate, and 0-0.5 part of sodium carboxymethyl cellulose;

[0009] ⑶Inkjet printing: The color ink configuration is mainly composed of cyan, blue, brown, wrapped yellow, bright red and black;

[0010] (4) Spraying green-promoting glaze: The green-promoting glaze formula is composed of the following components by weight: 30-35 parts of high-zinc low-temperature frit, 20-28 parts of fused quartz, 17-20 parts of quartz powder, 10-15 parts of white carbon black, and 8-12 parts of kaolin;

[0011] ⑸ Apply protective glaze: Select the surface gloss and texture of the product according to the development of green products, which can be dry granular glaze, matte or glossy protective glaze;

[0012] ⑹ High temperature firing.

[0013] As a preferred embodiment: the low-zirconium ultra-white cosmetic soil described in step (2) is further composed of the following components by weight: 6 parts of washed kaolin, 3 parts of black mud, 18 parts of glass frit, 2 parts of diopside, 2 parts of quartz powder, 4 parts of barium-based frit, 12 parts of ultrafine quartz powder, 15 parts of zircon white frit, 6 parts of calcined alumina powder, 3 parts of zirconium silicate, 10 parts of potassium feldspar, 7 parts of nepheline powder, 10 parts of ball clay, 2 parts of burnt talc, 0.6 parts of sodium tripolyphosphate, and 0.3 parts of sodium carboxymethyl cellulose;

[0014] The chemical composition of the low-zirconium ultra-white cosmetic clay consists of the following components by weight: SiO2 62.47%, Al2O3 22.95%, Fe2O3 0.15%, CaO 1.76%, MgO 2.13%, K2O 4.34%, Na2O 1.68%, ZrO2 2.92%, and BaO 1.60%.

[0015] Preferably: in step (2), the chemical composition of the glass frit is composed of the following components by weight: SiO2 68.51%, Al2O3 13.82%, Fe2O3 0.10%, CaO 3.15%, MgO 1.21%, K2O 9.68%, Na2O1.38%, B2O3 2.15%;

[0016] The chemical composition of the barium-based frit consists of the following components by weight percentage: SiO2 38.12%, Al2O3 15.46%, Fe2O3 0.01%, CaO 1.27%, MgO 2.17%, K2O 0.23%, Na2O 3.38%, BaO 39.36;

[0017] The chemical composition of the zirconium white frit consists of the following components by weight: SiO2 61.24%, Al2O3 10.15%, Fe2O3 0.14%, CaO 12.18%, MgO 3.05%, K2O 4.07%, Na2O 1.15%, ZrO2 5.44%, ZnO 2.13%, and LOI 0.45%.

[0018] As a preferred embodiment: in step (2), the low zirconium ultra-white cosmetic soil is glazed by pouring, the glazing specific gravity is 1.76-1.91, and the glazing amount is 400-550g / m 2 .

[0019] As a preference, the cyan ink formula of step (3) is composed of the following components by weight: 42 parts of cyan ceramic ink base powder, 45 parts of resin solvent, 5 parts of moisturizing agent, 5 parts of dispersant, and 3 parts of surfactant, wherein the chemical composition of the cyan ceramic ink base powder is composed of the following components by weight percentage: SiO2 23.29%, Al2O3 5.73%, ZrO2 31.31%, CaO 3.07%, Cr2O3 25.76%, CoO 5.05%, Pr6O 11 3.03%, Na2O 1.82%, Fe2O30.05%, MgO 0.84%, LOI 0.05%.

[0020] Preferably, the green-promoting glaze in step (4) is further composed of the following components in weight: 32 parts of high-zinc low-temperature frit, 28 parts of fused quartz, 17 parts of quartz powder, 14 parts of white carbon black, and 9 parts of kaolin; the chemical composition of the green-promoting glaze is composed of the following components in weight percentage: SiO2 60.5%, Al2O3 9.1%, CaO 12.1%, MgO 2.2%, K2O 4.3%, Na2O0.5%, and ZnO 11.3%.

[0021] Preferably, the chemical composition of the high-zinc low-temperature frit in step (4) consists of the following components by weight: SiO2 60.5%, Al2O3 9.1%, CaO 12.1%, MgO 2.2%, K2O 4.3%, Na2O0.5%, and ZnO 11.3%.

[0022] Preferably, the preparation method of the green-promoting glaze described in step (4) is as follows: the high-zinc low-temperature frit, fused quartz, quartz powder and kaolin materials in the green-promoting glaze formula are mixed in proportion, and auxiliary materials such as 0.15 parts of sodium carboxymethyl cellulose and 0.5 parts of sodium tripolyphosphate are added, and then 40 parts of water are added, and the mixture is ball-milled to a residue of 0.2-0.4% on a 325-mesh sieve, and set aside; white carbon black is added in a hydration manner at the glazing site, and the hydration ratio is: white carbon black: water = 1:5, and a stirring pump is used to slowly add white carbon black into the water and stir until there is no agglomeration and it is a colloidal substance; the colloidal substance is added to the glaze formula in the same dry material ratio of white carbon black in the formula, and circulated and stirred until uniform, so as to obtain a green-promoting glaze slurry that can be directly used.

[0023] As a preference: in step (4), the green-promoting glaze is applied in the form of spray glazing, the glazing specific gravity is 1.15-1.18, and the glazing amount is 200-220 g / m 2 .

[0024] Another technical solution of the present invention is the Dunhuang mural stone green ceramic rock slab, which is special in that it is prepared by the Dunhuang mural stone green ceramic rock slab preparation method described in any one of claims 1-9.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] ⑴ The green-promoting glaze formula of the present invention uses high-zinc low-temperature frit to replace the traditional calcined zinc oxide. Usually, green ink uses chromium as the origin of green color, and transparent glaze needs to add ZnO to achieve transparency. During the firing process, according to the order of cation coordination priority, the Zn in the glaze 2+ and Cr in ink 3+ The most easily generated structurally stable zinc-chromium spinel (Zn)[Cr2]O4, i.e. the green color body Cr 3+ The reaction with ZnO will decompose the colorant and affect the coloring effect. The present invention replaces the traditional calcined zinc oxide with a high-zinc low-temperature frit. The high-zinc low-temperature frit is made by high-temperature melting and clarification melting. The high-temperature melting time in the preparation process is long, the reaction is relatively complete, and the internal structure is relatively stable. The zinc glass phase material is rarely generated during the firing process when used in the green glaze. 2+ , that is, it has little effect on the color of green, and is also beneficial to the color of blue, brown, wrapped yellow, and bright red ink.

[0027] (2) In the green-promoting glaze formula described in the present invention, fused quartz, quartz powder and white carbon black are all raw materials mainly composed of SiO2. When used alone, they are in a raw-fired state. In the transparent glaze formula, they react with the high-zinc low-temperature frit in the formula to form a high-quartz glaze with good optical properties, which enables the color-producing particles in the ink to better scatter and reflect light, thereby enhancing the color saturation and gloss of the ink, and further effectively promoting the color of the green ink.

[0028] ⑶ The low-zirconium ultra-white cosmetic clay described in the present invention has a whiteness of 78°, which is high in whiteness and is beneficial to the color development of inkjet inks, especially green inks.

[0029] (4) The glass frit in the low-zirconium ultra-white cosmetic clay formula of the present invention has the characteristics of a lower melting temperature and a wider sintering temperature range, which can improve the whiteness of the cosmetic clay. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with embodiments:

[0031] Embodiment 1:

[0032] The method for preparing a Dunhuang mural stone green ceramic rock plate comprises the following steps:

[0033] ⑴ Pressing the green body;

[0034] (2) Low-zirconium ultra-white cosmetic soil: The low-zirconium ultra-white cosmetic soil is composed of the following components by weight: 6 parts of washed kaolin, 3 parts of black mud, 18 parts of glass frit, 2 parts of diopside, 2 parts of quartz powder, 4 parts of barium-based frit, 12 parts of ultrafine quartz powder, 15 parts of zircon white frit, 6 parts of calcined alumina powder, 3 parts of zirconium silicate, 10 parts of potassium feldspar, 7 parts of nepheline powder, 10 parts of ball clay, 2 parts of burned talc, 0.6 parts of sodium tripolyphosphate, and 0.3 parts of sodium carboxymethyl cellulose; The chemical composition of the low-zirconium ultra-white cosmetic soil is composed of the following components by weight percentage: SiO2 62.47%, Al2O3 22.95%, Fe2O30.15%, CaO 1.76%, MgO2.13%, K2O 4.34%, Na2O 1.68%, ZrO2 2.92%, BaO1.60%; the glaze is poured, the glaze specific gravity is 1.76-1.78, and the glaze amount is 525-530g / m 2 ;

[0035] The glass frit is a frit melted with waste glass as the main raw material, and the chemical composition of the glass frit is composed of the following components by weight percentage: SiO2 68.51%, Al2O3 13.82%, Fe2O30.10%, CaO 3.15%, MgO 1.21%, K2O 9.68%, Na2O 1.38%, B2O3 2.15%;

[0036] The barium-based frit is a frit prepared with barium oxide as the base material, and the chemical composition of the barium-based frit is composed of the following components by weight percentage: SiO2 38.12%, Al2O3 15.46%, Fe2O30.01%, CaO 1.27%, MgO2.17%, K2O 0.23%, Na2O 3.38%, BaO 39.36%;

[0037] The zirconium white frit contains zirconium and has an initial melting temperature of 900-1000° C. The chemical composition of the zirconium white frit consists of the following components by weight: SiO2 61.24%, Al2O3 10.15%, Fe2O3 0.14%, CaO 12.18%, MgO 3.05%, K2O 4.07%, Na2O 1.15%, ZrO2 5.44%, ZnO 2.13%, and LOI 0.45%; and its introduced fineness is 150-250 meshes.

[0038] Special note: In order to ensure that the product can present the rich and pure colors of the Dunhuang murals, it is necessary to ensure the purity of the ink color. The cosmetic soil is required to achieve a higher whiteness, which is conducive to the color of the inkjet ink, especially the green ink. Therefore, in order to ensure the whiteness of low-zirconium cosmetic soil, the carbon content of washed kaolin needs to be controlled at 0.75% to 0.93% in the selection of cosmetic soil raw materials. Under the conditions of a maximum firing temperature of 1200°C and a firing cycle of 70 minutes, the whiteness is 67°; the carbon content of black mud is controlled at 1.35 to 1.48%, and under the conditions of a maximum firing temperature of 1200°C and a firing cycle of 70 minutes, the whiteness is 63°; ultrafine quartz powder, calcined alumina powder, and zirconium silicate are industrial-grade raw materials, and the fineness introduced is 325 mesh sieves, the median particle size is 30±5 microns, and the fineness introduced by potassium feldspar and nepheline powder is 200 to 300 meshes; in order to ensure that the low-zirconium ultra-white cosmetic soil is conducive to the color of inkjet ink, the iron content in the cosmetic soil slurry needs to be controlled at 0.12 to 0.16%, and the fineness is controlled at 0.4 to 0.7% of the residue on the 325 mesh sieve.

[0039] In terms of the adaptability adjustment of the Dunhuang mural stone green ceramic rock plate makeup soil formula, the zirconium white frit and calcined alumina powder in the formula are the glaze firing temperature adjustment materials. Under normal conditions, under the firing conditions of the highest firing temperature of 1200°C and a firing cycle of 70 minutes, the body + low zirconium system ultra-white makeup soil is used for trial firing, and the surface gloss of the test sample is 4-7° and the whiteness is 75-85°, which can meet the Dunhuang mural stone green ceramic rock plate ink coloring requirements for makeup soil;

[0040] When the glossiness of the green body + low zirconium ultra-white cosmetic clay test-fired sample is lower than 4°, it can be judged that the sample is raw-fired, and the zirconium white frit should be appropriately increased or the calcined alumina powder should be reduced;

[0041] When the glossiness of the green body + low zirconium ultra-white cosmetic clay test-fired sample is higher than 7°, it can be judged that the sample is over-burned, which may cause defects such as bubbles and pinholes. The zirconium white frit should be appropriately reduced or the calcined alumina powder should be increased.

[0042] ⑶ Inkjet printing: The color ink configuration uses a combination of cyan, blue, brown, wrapped yellow, bright red and black inks. Among them, the Dunhuang mural stone green ceramic rock plate is mainly cyan ceramic ink, and the auxiliary ink is blue. Other color inks are selected and combined according to the pattern design.

[0043] The cyan ink formula is composed of the following components by weight: 42 parts of cyan ceramic ink base material powder, 45 parts of resin solvent, 5 parts of moisturizing agent, 5 parts of dispersant, and 3 parts of surfactant, wherein the chemical composition of the cyan ceramic ink base material powder is composed of the following components by weight percentage: SiO2 23.29%, Al2O3 5.73%, ZrO2 31.31%, CaO3.07%, Cr2O3 25.76%, CoO 5.05%, Pr6O 11 3.03%, Na2O 1.82%, Fe2O3 0.05%, MgO0.84%, LOI: 0.05%.

[0044] Special note: This turquoise ceramic ink is printed on pure low-zirconium ultra-white cosmetic clay in a single channel at 100% grayscale. The Lab values ​​of the color after firing are: L: 52, a: -32, b: -6. The turquoise color is pure and meets the development requirements of the Dunhuang stone green system.

[0045] (4) Spraying green-promoting glaze: The green-promoting glaze formula is composed of the following components by weight: 32 parts of high-zinc low-temperature frit, 28 parts of fused quartz, 17 parts of quartz powder, 14 parts of white carbon black, and 9 parts of kaolin; the chemical composition of the green-promoting glaze is composed of the following components by weight percentage: SiO2 60.5%, Al2O3 9.1%, CaO 12.1%, MgO 2.2%, K2O 4.3%, Na2O0.5%, ZnO 11.3%. The green-promoting glaze is applied in the form of spraying glaze, the glazing specific gravity is 1.15-1.16, and the glazing amount is 202-205g / m 2 ;

[0046] The high-zinc low-temperature frit is a frit with a ZnO weight percentage exceeding 10%, an initial melting temperature of 800-900° C., a high zinc content, and a low sintering temperature. The chemical composition of the high-zinc low-temperature frit is composed of the following components by weight percentage: SiO2 60.5%, Al2O3 9.1%, CaO12.1%, MgO 2.2%, K2O 4.3%, Na2O 0.5%, and ZnO11.3%;

[0047] The preparation method of the green-promoting glaze is as follows: the high-zinc low-temperature frit, fused quartz, quartz powder, and kaolin materials in the green-promoting glaze formula are mixed in proportion, and 0.15 parts of sodium carboxymethyl cellulose and 0.5 parts of sodium tripolyphosphate are added as auxiliary materials, and 40 parts of water are added, and the mixture is ball-milled to a 325-mesh sieve with a residue of 0.2-0.4%, and then used. White carbon black is added in a hydration manner at the glazing site, and the hydration ratio is: white carbon black: water = 1:5. A stirring pump is used to slowly add white carbon black to the water and stir until there is no agglomeration phenomenon and it is a colloidal substance; the colloidal substance is added to the glaze formula in the same dry material ratio as the white carbon black in the formula, and the mixture is stirred in a cycle until it is uniform;

[0048] Special note: When producing products with darker colors and larger inkjet volumes, an ink-repellent can be added to the green-promoting glaze to avoid glaze defects. The ink-repellent is a water-and-oil compatible surfactant based on fatty alcohol polyoxyethylene ether.

[0049] In the green glaze formula, the amount of fused quartz and quartz powder should be adjusted according to the kiln firing temperature and firing time. The amount of fused quartz can be increased to help the formation of eutectic and reduce the excessive amount of free quartz caused by the introduction of too much quartz powder, which in turn causes the instability of the glaze formula. The hydrophilic type of white carbon black is selected, with a specific surface area of ​​260m 2 / g, with high specific surface area, high dispersibility and reactivity, in practical application, hydrophilic type silica is the key material to promote the color of cyan ceramic ink;

[0050] ⑸ Apply protective glaze: Select the surface gloss and texture of the product according to the development of green products, which can be dry granular glaze, matte or glossy protective glaze;

[0051] (6) High temperature firing: the maximum firing temperature is 1160℃, and the firing cycle is 65min.

[0052] This embodiment also includes a Dunhuang mural stone green ceramic rock slab prepared by the aforementioned Dunhuang mural stone green ceramic rock slab preparation method.

[0053] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for preparing a Dunhuang mural stone green ceramic rock plate, characterized in that: The following steps are involved: ⑴ Pressing the green body; (2) Low-zirconium ultra-white cosmetic soil: The low-zirconium ultra-white cosmetic soil formula is composed of the following components by weight: 5-8 parts of washed kaolin, 2-5 parts of black mud, 15-20 parts of glass frit, 0-2 parts of diopside, 0-2 parts of quartz powder, 2-5 parts of barium-based frit, 10-15 parts of ultrafine quartz powder, 10-20 parts of zircon white frit, 6-10 parts of calcined alumina powder, 1-3 parts of zirconium silicate, 10-15 parts of potassium feldspar, 5-8 parts of nepheline powder, 10-15 parts of ball clay, 2-3 parts of burnt talc, 0.5-1 part of sodium tripolyphosphate, and 0-0.5 part of sodium carboxymethyl cellulose; ⑶Inkjet printing: The color ink configuration is mainly composed of cyan, blue, brown, wrapped yellow, bright red and black; (4) Spraying green-promoting glaze: The green-promoting glaze formula is composed of the following components by weight: 30-35 parts of high-zinc low-temperature frit, 20-28 parts of fused quartz, 17-20 parts of quartz powder, 10-15 parts of white carbon black, and 8-12 parts of kaolin; ⑸ Apply protective glaze: Select the surface gloss and texture of the product according to the development of green products, which can be dry granular glaze, matte or glossy protective glaze; ⑹ High temperature firing.

2. The method for preparing the Dunhuang mural stone green ceramic rock slab according to claim 1, characterized in that: The low-zirconium ultra-white cosmetic soil described in step (2) is further composed of the following components by weight: 6 parts of washed kaolin, 3 parts of black mud, 18 parts of glass frit, 2 parts of diopside, 2 parts of quartz powder, 4 parts of barium-based frit, 12 parts of ultrafine quartz powder, 15 parts of zircon white frit, 6 parts of calcined alumina powder, 3 parts of zirconium silicate, 10 parts of potassium feldspar, 7 parts of nepheline powder, 10 parts of ball clay, 2 parts of burnt talc, 0.6 parts of sodium tripolyphosphate, and 0.3 parts of sodium carboxymethyl cellulose; The chemical composition of the low-zirconium ultra-white cosmetic clay consists of the following components by weight: SiO2 62.47%, Al2O3 22.95%, Fe2O3 0.15%, CaO 1.76%, MgO 2.13%, K2O 4.34%, Na2O 1.68%, ZrO2 2.92%, and BaO 1.60%.

3. The method for preparing the Dunhuang mural green ceramic slab according to claim 1, characterized in that: Step (2) The chemical composition of the glass frit is composed of the following components by weight: SiO2 68.51%, Al2O3 13.82%, Fe2O3 0.10%, CaO 3.15%, MgO 1.21%, K2O 9.68%, Na2O 1.38%, B2O3 2.15%; The chemical composition of the barium-based frit is composed of the following components by weight percentage: SiO2 38.12%, Al2O3 15.46%, Fe2O3 0.01%, CaO 1.27%, MgO 2.17%, K2O 0.23%, Na2O 3.38%, BaO39.36; The chemical composition of the zirconium white frit consists of the following components by weight: SiO2 61.24%, Al2O3 10.15%, Fe2O3 0.14%, CaO 12.18%, MgO 3.05%, K2O 4.07%, Na2O 1.15%, ZrO2 5.44%, ZnO 2.13%, and LOI 0.45%.

4. The method for preparing the Dunhuang mural stone green ceramic slab according to claim 1, characterized in that: Step (2) The low zirconium ultra-white cosmetic soil is glazed by pouring glaze, the glazing specific gravity is 1.76-1.91, and the glazing amount is 400-550 g / m 2 .

5. The method for preparing the Dunhuang mural stone green ceramic rock plate according to claim 1, characterized in that: The cyan ink formula of step (3) is composed of the following components by weight: 42 parts of cyan ceramic ink base powder, 45 parts of resin solvent, 5 parts of moisturizing agent, 5 parts of dispersant, and 3 parts of surfactant, wherein the chemical composition of the cyan ceramic ink base powder is composed of the following components by weight percentage: SiO2 23.29%, Al2O3 5.73%, ZrO2 31.31%, CaO 3.07%, Cr2O3 25.76%, CoO 5.05%, Pr6O 11 3.03%, Na2O 1.82%, Fe2O3 0.05%, MgO 0.84%, LOI0.05%.

6. The method for preparing the Dunhuang mural stone green ceramic slab according to claim 1, characterized in that: The green-promoting glaze in step (4) is further composed of the following components by weight: 32 parts of high-zinc low-temperature frit, 28 parts of fused quartz, 17 parts of quartz powder, 14 parts of white carbon black, and 9 parts of kaolin; the chemical composition of the green-promoting glaze is composed of the following components by weight percentage: SiO2 60.5%, Al2O3 9.1%, CaO 12.1%, MgO 2.2%, K2O 4.3%, Na2O 0.5%, and ZnO 11.3%.

7. The method for preparing the Dunhuang mural stone green ceramic rock plate according to claim 1, characterized in that: The chemical composition of the high-zinc low-temperature frit in step (4) consists of the following components by weight: SiO2 60.5%, Al2O3 9.1%, CaO 12.1%, MgO 2.2%, K2O 4.3%, Na2O 0.5%, and ZnO 11.3%.

8. The method for preparing the Dunhuang mural stone green ceramic slab according to claim 1, characterized in that: The preparation method of the green-promoting glaze described in step (4) is as follows: the high-zinc low-temperature frit, fused quartz, quartz powder, and kaolin materials in the green-promoting glaze formula are mixed in proportion, and auxiliary materials 0.15 parts of sodium carboxymethyl cellulose and 0.5 parts of sodium tripolyphosphate are added, and then 40 parts of water are added, and the mixture is ball-milled to a 325-mesh sieve with a residue of 0.2-0.4%, and set aside; white carbon black is added in a hydration manner at the glazing site, and the hydration ratio is: white carbon black: water = 1:5, and a stirring pump is used to slowly add white carbon black to the water and stir until there is no agglomeration phenomenon and it is a colloidal substance; the colloidal substance is added to the glaze formula with the same dry material ratio of white carbon black in the formula, and the mixture is circulated and stirred until uniform, so as to obtain a green-promoting glaze slurry that can be directly used.

9. The method for preparing the Dunhuang mural stone green ceramic rock plate according to claim 1, characterized in that: In step (4), the green-promoting glaze is applied in the form of spray glazing, the glazing specific gravity is 1.15-1.18, and the glazing amount is 200-220 g / m 2 .

10. A Dunhuang mural stone green ceramic rock plate, characterized in that: The ceramic rock slab is prepared by the method for preparing the Dunhuang mural stone green system as described in any one of claims 1 to 9.