A kind of kiln-transformed purple-red glaze

Abstract

The present invention discloses a kiln-transformed purple-red glaze, belonging to the technical field of kiln-transformed glazes, which includes a base glaze and a surface glaze; the base glaze comprises the following raw materials in parts by weight: 18-25 parts of potassium feldspar, 15-20 parts of sodium feldspar, 20-25 parts of quartz, 10-15 parts of calcite, 4-5 parts of Jiepai clay, 1-2 parts of Guizhou soil, 9-11 parts of frit, 9-10 parts of iron oxide red, 9-10 parts of manganese carbonate; the surface glaze comprises the following raw materials in parts by weight: 5-10 parts of modified diatomite, 60-80 parts of silicon carbide, 8-12 parts of talcum powder, 6-9 parts of alumina, 1.5-2.5 parts of sodium carboxymethyl cellulose. The present invention mixes natural raw materials and chemical raw materials according to a specific weight ratio, and under the action of high-temperature melting, burns out a unique effect of purple-red kiln transformation. The color rendering effect of this formula has extremely high artistic value and broad practical market prospects, and has good wear resistance, antibacterial property and easy cleaning performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of kiln-transformed glaze, and particularly relates to a kiln-transformed purple-red glaze. Background Art

[0002] The patterns and colors of kiln-transformed glaze are not artificially painted, but are naturally formed through the "kiln transformation" process. It is a kind of art ceramic glaze with unpredictable changes and is mainly used for decorating ceramic handicrafts. The main reasons for the kiln transformation effect are glaze composition, firing system, and firing environment. The glaze composition is the internal factor, and the firing system and firing environment are external factors. Under suitable internal and external conditions, the molten glaze undergoes phase separation, and then through processes such as crystallization and color development, a kaleidoscopic kiln-transformed glaze is formed.

[0003] Generally, kiln-transformed glaze is divided into two types according to the glazing process. One is that a single glaze is fired on the embryo body, and due to changes in the properties of the glaze itself and the disturbance of the firing atmosphere, a gorgeous glaze surface is produced. The other is the application of a base glaze and a top glaze, and even multiple top glazes are overlapped and fired to produce a blended effect. The surface of ceramic utensils prepared with multiple top glazes is smoother, so they are widely popular. However, the Mohs hardness of the currently prepared kiln-transformed purple-red glaze is relatively low, and it is easy to be soiled and breed bacteria. Summary of the Invention

[0004] The purpose of the present invention is to provide a kiln-transformed purple-red glaze to solve the problems of poor wear resistance and easy soiling and bacteria breeding of existing kiln-transformed purple-red glaze porcelain.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A kiln-transformed purple-red glaze includes a base glaze and a top glaze;

[0007] The base glaze includes the following raw materials in parts by weight: 18 - 25 parts of potassium feldspar, 15 - 20 parts of sodium feldspar, 20 - 25 parts of quartz, 10 - 15 parts of calcite, 4 - 5 parts of Jiepai clay, 1 - 2 parts of Guizhou soil, 9 - 11 parts of frit, 9 - 10 parts of iron oxide red, and 9 - 10 parts of manganese carbonate;

[0008] The top glaze includes the following raw materials in parts by weight: 5 - 10 parts of modified diatomite, 60 - 80 parts of silicon carbide, 8 - 12 parts of talcum powder, 6 - 9 parts of alumina, and 1.5 - 2.5 parts of sodium carboxymethyl cellulose;

[0009] The preparation method of the kiln-transformed purple-red glaze includes the following steps:

[0010] First step: Add the base glaze raw materials, water, and balls into a ball mill according to a mass ratio of 1:1:1.5. When the fineness of the glaze slurry reaches 0.08 - 0.12% of the residue on a 250-mesh sieve, continue ball milling for 1 - 2 hours to obtain the base glaze slurry;

[0011] Step 2: Add the surface glaze raw materials and water into a ball mill, control the solid content to be 55 - 60%, the mass ratio of balls to surface glaze raw materials to be 1:2 - 1, ball mill at a rotation speed of 400 - 500 r / min for 0.5 - 1 h, then add 2% kaolin and 1% carboxymethyl cellulose based on the mass of the surface glaze raw materials, stir and ball mill for 0.5 - 1 h to obtain the surface glaze slurry;

[0012] Step 3: Apply the bottom glaze slurry onto the ceramic biscuit body, control the glaze layer thickness to be 0.3 - 0.5 mm, after natural air drying, apply the surface glaze slurry, control the thickness to be 0.2 - 0.3 mm, dry and then fire to obtain the kiln - transformed purple - red glaze.

[0013] As a further technical solution of the present invention, the modified diatomite is prepared through the following steps:

[0014] S1: Add acidified diatomite into a silver nitrate solution, and irradiate with ultraviolet light for 15 - 25 min, filter to obtain the seed body. Add the silver ammonia solution into the glucose solution, stir and then add the seed body, take it out after reacting at 40 - 50 °C for 1 h, wash with deionized water, and dry to obtain silver - loaded diatomite;

[0015] S2: Ultrasonically mix the silver - loaded diatomite and deionized water, dropwise add lanthanum nitrate solution and zirconium nitrate solution at a rotation speed of 200 r / min. After the dropping is completed, stir for 1 - 2 h and then filter by suction. Wash the filter cake with deionized water, dry, and then place it in a muffle furnace and calcine at 400 °C for 2 h, and naturally cool to room temperature to obtain the modified diatomite.

[0016] First, load silver seeds on the acidified diatomite, and then grow the silver seeds into silver nanoparticles in the glucose and silver ammonia solution to obtain silver - loaded diatomite; subsequently, load lanthanum ions and zirconium ions, and form a composite product of lanthanum oxide, zirconium oxide and silver - loaded diatomite after high - temperature calcination. Through the secondary loading treatment, on the one hand, the degradation and discoloration of silver nanoparticles are effectively controlled, and on the other hand, it helps silver elements generate more reactive oxygen species to participate in the antibacterial process, playing a synergistic bactericidal role.

[0017] As a further technical solution of the present invention, in S1, the dosage ratio of acidified diatomite, silver nitrate solution, silver ammonia solution and glucose solution is 0.5 - 1 g: 10 mL: 10 mL: 5 mL, the concentration of the silver nitrate solution is 0.05 mol / L, the concentration of the silver ammonia solution is 0.3 mol / L, which is prepared from silver nitrate solution and ammonia water, the concentration of the glucose solution is 0.2 mol / L, and the ultraviolet irradiation is carried out simultaneously using 254 nm and 365 nm ultraviolet lamps.

[0018] As a further technical solution of the present invention, the dosage ratio of silver-loaded diatomite, deionized water, lanthanum nitrate solution and zirconium nitrate solution in S2 is 5-10 g: 100 mL: 10 mL: 10 mL, the concentration of the lanthanum nitrate solution is 0.05 mol / L, and the concentration of the zirconium nitrate solution is 0.1 mol / L.

[0019] As a further technical solution of the present invention, the preparation method of acidified diatomite is as follows:

[0020] Add diatomite to hydrochloric acid solution, keep it at 60 °C for 2 h, then take it out, wash it with deionized water until the washing liquid is neutral, and finally calcine it in a muffle furnace at 450 °C for 2 h;

[0021] In the above process, the dosage ratio of diatomite to hydrochloric acid solution is 10 g: 50-100 mL, and the concentration of the hydrochloric acid solution is 3 mol / L.

[0022] As a further technical solution of the present invention, the average particle size of silicon carbide is 10-20 μm.

[0023] As a further technical solution of the present invention, dipping glazing method or pouring glazing method is adopted during glazing.

[0024] As a further technical solution of the present invention, the firing conditions are: firing in an oxidizing atmosphere, starting to heat up at a speed of 100-120 °C / h, heating up to 1130-1150 °C, holding for 30-60 min, then heating up to 1190-1220 °C, holding for 40-60 min, and then cooling to room temperature.

[0025] The beneficial effects of the present invention:

[0026] 1. The present invention provides a kiln-changed purple-red glaze, which mixes natural raw materials and chemical raw materials according to a specific component ratio, and under the action of high-temperature melting, burns out a unique effect of purple-red kiln change. The color rendering effect of this formula has extremely high artistic value and broad practical market prospects.

[0027] 2. The glaze material of the color-changing purple-red glaze provided by the present invention is prepared from raw materials such as self-made modified diatomite, silicon carbide, talcum powder, and alumina. The silicon source provided by the modified diatomite can react with magnesium oxide in alumina and talcum powder to produce cordierite phase, and contains organic matters such as calcium oxide and magnesium oxide, which will form a molten liquid phase during high-temperature sintering, reduce the sintering temperature, change the system from single-solid-phase sintering to solid-liquid sintering, accelerate the combination between particles in the system, and improve the density of the glaze layer. During the sintering process of silicon carbide, amorphous silica will be generated on the surface, gradually changing the previous loose structure between raw materials into neck bonding, making the combination of silicon carbide in the system more compact, endowing the glaze with high Mohs hardness, and improving its stain resistance and wear resistance. In addition, the modified diatomite also contains nano silver, lanthanum oxide, and zirconium oxide, which not only have good antibacterial effects, but also because the 4+ radii of Zr 2+ and Mg 4+ are similar. During the melting process, Zr 2+ in zirconium oxide will replace part of Mg 3+ in the raw materials, resulting in lattice distortion, promoting the firing of the glaze body, and zirconium oxide reacts with silica in the raw materials to produce zirconium silicate, promoting the densification of the specimen. Lanthanum oxide is a liquid-phase accelerator, which can reduce the formation temperature of the liquid phase, provide the diffusion rate of Al 2+ and Mg diffusing to the surface of silica ions, promoting the densification of the glaze body during firing, preventing the penetration of pollution media such as water, forming a smooth surface, enabling the stains on the surface to be easily removed, and finally making the obtained color-changing purple-red glaze have good wear resistance, easy cleaning, and antibacterial properties.

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 FIG. is a schematic diagram of the color-changing purple-red glaze obtained in Example 3 of the present invention. Detailed Embodiments

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0031] Example 1

[0032] A kind of modified diatomite is made through the following steps:

[0033] S1. Add 0.5 kg of acidified diatomaceous earth into 10 L of silver nitrate solution with a concentration of 0.05 mol / L, and irradiate it with 254 nm and 365 nm ultraviolet lamps for 15 min simultaneously. Then filter to obtain the seed body. Add 10 L of silver ammonia solution with a concentration of 0.3 mol / L into 5 L of glucose solution with a concentration of 0.2 mol / L. After stirring, add the seed body. Take it out after reacting at 40 °C for 1 h, wash it with deionized water, and dry it to obtain silver-loaded diatomaceous earth;

[0034] S2. Ultrasonically mix 5 g of silver-loaded diatomaceous earth and 100 mL of deionized water. Dropwise add 10 mL of lanthanum nitrate solution with a concentration of 0.05 mol / L and 10 mL of zirconium nitrate solution with a concentration of 0.1 mol / L at a rotation speed of 200 r / min. After the dropping is completed, stir for 1 h and then filter by suction. Wash the filter cake with deionized water, dry it, and then place it in a muffle furnace and calcine it at 400 °C for 2 h. Naturally cool it to room temperature to obtain modified diatomaceous earth.

[0035] The preparation method of acidified diatomaceous earth is as follows:

[0036] Add 10 g of diatomaceous earth into 80 mL of hydrochloric acid solution with a concentration of 3 mol / L, take it out after heat preservation treatment at 60 °C for 2 h, wash it with deionized water until the washing liquid is neutral, and finally place it in a muffle furnace and calcine it at 450 °C for 2 h.

[0037] Example 2

[0038] A modified diatomaceous earth is prepared through the following steps:

[0039] S1. Add 1 kg of acidified diatomaceous earth into 10 L of silver nitrate solution with a concentration of 0.05 mol / L, and irradiate it with 254 nm and 365 nm ultraviolet lamps for 25 min simultaneously. Then filter to obtain the seed body. Add 10 L of silver ammonia solution with a concentration of 0.3 mol / L into 5 L of glucose solution with a concentration of 0.2 mol / L. After stirring, add the seed body. Take it out after reacting at 50 °C for 1 h, wash it with deionized water, and dry it to obtain silver-loaded diatomaceous earth. The preparation of acidified diatomaceous earth is the same as that in Example 1;

[0040] S2. Ultrasonically mix 10 g of silver-loaded diatomaceous earth and 100 mL of deionized water. Dropwise add 10 mL of lanthanum nitrate solution with a concentration of 0.05 mol / L and 10 mL of zirconium nitrate solution with a concentration of 0.1 mol / L at a rotation speed of 200 r / min. After the dropping is completed, stir for 2 h and then filter by suction. Wash the filter cake with deionized water, dry it, and then place it in a muffle furnace and calcine it at 400 °C for 2 h. Naturally cool it to room temperature to obtain modified diatomaceous earth.

[0041] Comparative Example 1

[0042] This comparative example provides a modified diatomaceous earth, which is the product obtained in step S1 of Example 1.

[0043] Comparative Example 2

[0044] This comparative example is the acidified diatomaceous earth in Example 1.

[0045] Example 3

[0046] Please refer to Figure 1 , a kiln - transformed purple - red glaze, comprising a bottom glaze and a top glaze;

[0047] The bottom glaze comprises the following raw materials in parts by weight: 18 parts of potassium feldspar, 15 parts of sodium feldspar, 20 parts of quartz, 10 parts of calcite, 4 parts of Jiepai clay, 1 part of Guizhou soil, 9 parts of frit, 9 parts of iron oxide red, and 9 parts of manganese carbonate;

[0048] The top glaze comprises the following raw materials in parts by weight: 5 parts of the modified diatomaceous earth of Example 1, 60 parts of silicon carbide, 8 parts of talcum powder, 6 parts of alumina, and 1.5 parts of sodium carboxymethyl cellulose;

[0049] The preparation method of this kiln - transformed purple - red glaze comprises the following steps:

[0050] First step: Add the bottom - glaze raw materials, water, and balls into a ball mill according to a mass ratio of 1:1:1.5. When the fineness of the glaze slurry reaches 0.08% residue on a 250 - mesh sieve, continue ball - milling for 1 h to obtain the bottom - glaze slurry;

[0051] Second step: Add the top - glaze raw materials and water into a ball mill, control the solid content to be 55%, the mass ratio of balls to top - glaze raw materials to be 1:2, ball - mill at a rotation speed of 400 r / min for 0.5 h, then add 2% kaolin and 1% sodium carboxymethyl cellulose based on the mass of the top - glaze raw materials, and stir and ball - mill for 0.5 h to obtain the top - glaze slurry;

[0052] Third step: Apply the bottom - glaze slurry onto the ceramic biscuit body, control the thickness of the glaze layer to be 0.3 mm, after natural air - drying, apply the top - glaze slurry, control the thickness to be 0.2 mm, after air - drying, fire in an oxidizing atmosphere. Start heating at a speed of 100 °C / h, heat up to 1130 °C, hold for 30 min, then heat up to 1190 °C, hold for 40 min, and then cool to room temperature to obtain the kiln - transformed purple - red glaze.

[0053] Among them, the average particle size of silicon carbide is 10 - 20 μm, the frit is a commercially available frit with the model JM669, and the dipping glazing method is used during glazing.

[0054] As Figure 1 shown, the kiln - transformed purple - red glaze obtained in this example has a smooth surface and gorgeous colors.

[0055] Example 4

[0056] A kiln - transformed purple - red glaze, comprising a bottom glaze and a top glaze;

[0057] The underglaze comprises the following raw materials in parts by weight: 22 parts of potassium feldspar, 18 parts of sodium feldspar, 22 parts of quartz, 12 parts of calcite, 4 parts of Jiepai clay, 1 part of Guizhou soil, 10 parts of frit, 9 parts of iron oxide red, and 9 parts of manganese carbonate;

[0058] The overglaze comprises the following raw materials in parts by weight: 8 parts of the modified diatomite of Example 2, 70 parts of silicon carbide, 10 parts of talc powder, 8 parts of alumina, and 2 parts of sodium carboxymethyl cellulose;

[0059] The preparation method of the color-changing purple-red glaze comprises the following steps:

[0060] First step: Add the underglaze raw materials, water and balls into a ball mill according to a mass ratio of 1:1:1.5. When the fineness of the glaze slurry reaches 0.1% of the residue on a 250-mesh sieve, continue ball milling for 1.5 h to obtain the underglaze slurry;

[0061] Second step: Add the overglaze raw materials and water into a ball mill, control the solid content to be 58%, and the mass ratio of balls to overglaze raw materials to be 1:2. Ball mill at a rotation speed of 450 r / min for 0.8 h, then add 2% kaolin and 1% sodium carboxymethyl cellulose based on the mass of the overglaze raw materials, and stir and ball mill for 0.8 h to obtain the overglaze slurry;

[0062] Third step: Apply the underglaze slurry onto the ceramic biscuit body, control the glaze layer thickness to be 0.4 mm, and after natural air drying, apply the overglaze slurry, control the thickness to be 0.2 mm. After air drying, fire in an oxidizing atmosphere. Initially, heat up at a speed of 110 °C / h to 1140 °C, hold for 40 min, then heat up to 1200 °C, hold for 50 min, and then cool to room temperature to obtain the color-changing purple-red glaze.

[0063] Among them, the average particle size of silicon carbide is 10 - 20 μm, the frit is a commercially available frit with the model JM669, and the glazing method is the pouring glaze method when applying glaze.

[0064] Example 5

[0065] A color-changing purple-red glaze, comprising an underglaze and an overglaze;

[0066] The underglaze comprises the following raw materials in parts by weight: 25 parts of potassium feldspar, 20 parts of sodium feldspar, 25 parts of quartz, 15 parts of calcite, 5 parts of Jiepai clay, 2 parts of Guizhou soil, 11 parts of frit, 10 parts of iron oxide red, and 10 parts of manganese carbonate;

[0067] The overglaze comprises the following raw materials in parts by weight: 10 parts of the modified diatomite of Example 2, 80 parts of silicon carbide, 12 parts of talc powder, 9 parts of alumina, and 2.5 parts of sodium carboxymethyl cellulose;

[0068] The preparation method of the color-changing purple-red glaze comprises the following steps:

[0069] Step 1: Add the base glaze raw materials, water, and balls into a ball mill at a mass ratio of 1:1:1.5. When the fineness of the glaze slurry reaches 0.12% residue on a 250-mesh sieve, continue ball milling for 2 h to obtain the base glaze slurry.

[0070] Step 2: Add the surface glaze raw materials and water into a ball mill, control the solid content to be 60%, and the mass ratio of balls to surface glaze raw materials to be 1:1. Ball mill for 1 h at a rotation speed of 500 r / min. Then add 2% kaolin and 1% carboxymethyl cellulose based on the mass of the surface glaze raw materials, and stir and ball mill for 1 h to obtain the surface glaze slurry.

[0071] Step 3: Apply the base glaze slurry onto the ceramic biscuit body, control the glaze layer thickness to be 0.5 mm, and let it air-dry naturally. Then apply the surface glaze slurry, control the thickness to be 0.3 mm, and let it dry. Then fire it in an oxidizing atmosphere, starting to heat up at a speed of 120 °C / h, heating up to 1150 °C, holding for 60 min, then heating up to 1220 °C, holding for 60 min, and then cooling to room temperature to obtain the kiln-transformed purple-red glaze.

[0072] Among them, the average particle size of silicon carbide is 10 - 20 μm, the frit is a commercially available frit with the model JM669, and the dipping glazing method is used during glazing.

[0073] Comparative Example 3

[0074] Compared with Example 3, replace the modified diatomite in Example 3 with the substance in Comparative Example 1, and the other raw materials and preparation process are the same as those in Example 3.

[0075] Comparative Example 4

[0076] Compared with Example 3, replace the modified diatomite in Example 3 with the substance in Comparative Example 2, and the other raw materials and preparation process are the same as those in Example 3.

[0077] Perform performance tests on the kiln-transformed purple-red glazes obtained from Examples 3 - 5 and Comparative Examples 3 - 4. Mohs hardness: Use the pen scratching method. Easy-to-clean performance: Test the easy-to-clean performance according to "GB / T 31859-2015 Test Method for Easy-to-Clean Performance of Domestic Porcelain", and use A to represent the residual oil stain amount per unit area: A ≤ 0.5 g / m 2 , it is easy to clean; 0.5 g / m 2 <A ≤ 1.0 g / m 2 , it is relatively easy to clean, 1.0 g / m 2 <A ≤ 1.5 g / m 2 , it is cleanable, A > 1.5 g / m 2 , it is not cleanable; Antibacterial performance: Test the antibacterial property according to "JC / T897-2014 Antibacterial Property of Antibacterial Ceramic Products", using Escherichia coli AS1.90 and Staphylococcus aureus AS1.89 as the test strains;

[0078] The test results are shown in Table 1 as follows:

[0079] Table 1

[0080]

[0081]

[0082] It can be seen from Table 1 that compared with Comparative Example 3 and Comparative Example 4, the color-changing purple-red glaze obtained in Example 3, Example 4, and Example 5 has more excellent wear resistance, antibacterial property, and easy-cleaning property.

[0083] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0084] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A kiln-transformed purple-red glaze, characterized in that, It includes a bottom glaze and a top glaze; The bottom glaze includes the following raw materials in parts by weight: 18 - 25 parts of potassium feldspar, 15 - 20 parts of sodium feldspar, 20 - 25 parts of quartz, 10 - 15 parts of calcite, 4 - 5 parts of Jiepai clay, 1 - 2 parts of Guizhou soil, 9 - 11 parts of frit, 9 - 10 parts of iron oxide red, and 9 - 10 parts of manganese carbonate; The top glaze includes the following raw materials in parts by weight: 5 - 10 parts of modified diatomite, 60 - 80 parts of silicon carbide, 8 - 12 parts of talc powder, 6 - 9 parts of alumina, and 1.5 - 2.5 parts of sodium carboxymethyl cellulose; The modified diatomite is made through the following steps: Ultrasonically mix silver - loaded diatomite and deionized water, dropwise add lanthanum nitrate solution and zirconium nitrate solution. After the dropping is completed, stir for 1 - 2 h and then filter by suction. Wash and dry the filter cake, and then place it in a muffle furnace and calcine at 400 °C for 2 h, and naturally cool to room temperature to obtain the modified diatomite; The frit is a commercially available frit with the model JM669; The firing conditions of the color - changing purple - red glaze are: firing in an oxidizing atmosphere, starting to heat up at a speed of 100 - 120 °C / h, heating up to 1130 - 1150 °C, holding for 30 - 60 min, then heating up to 1190 - 1220 °C, holding for 40 - 60 min, and then cooling to room temperature.

2. A kind of kiln-transformed purple-red glaze according to claim 1, characterized in that, The dosage ratio of silver - loaded diatomite, deionized water, lanthanum nitrate solution and zirconium nitrate solution is 5 - 10 g: 100 mL: 10 mL: 10 mL, the concentration of lanthanum nitrate solution is 0.05 mol / L, and the concentration of zirconium nitrate solution is 0.1 mol / L.

3. A kind of kiln-transformed purple-red glaze according to claim 1, characterized in that, The silver - loaded diatomite is made through the following steps: Add acidified diatomite into silver nitrate solution and irradiate with ultraviolet light for 15 - 25 min, filter to obtain the seed body. Add silver ammonia solution into glucose solution, stir and then add the seed body, react at 40 - 50 °C for 1 h and then take it out, wash with deionized water and dry to obtain silver - loaded diatomite.

4. A kind of kiln-transformed purple-red glaze according to claim 3, characterized in that, The dosage ratio of acidified diatomite, silver nitrate solution, silver ammonia solution and glucose solution is 0.5 - 1 g: 10 mL: 10 mL: 5 mL, the concentration of silver nitrate solution is 0.05 mol / L, the concentration of silver ammonia solution is 0.3 mol / L, and the concentration of glucose solution is 0.2 mol / L.

5. A kind of kiln-transformed purple-red glaze according to claim 1, characterized in that, The average particle size of silicon carbide is 10 - 20 μm.

6. A kind of kiln-transformed purple-red glaze according to claim 1, characterized in that, It is made through the following steps: First step: Add the bottom - glaze raw materials, water and balls into a ball mill according to the mass ratio of 1:1:1.

5. When the fineness of the glaze slurry reaches 0.08 - 0.12% of the 250 - mesh sieve residue, continue ball - milling for 1 - 2 h to obtain the bottom - glaze slurry; Second step: Add the top - glaze raw materials and water into a ball mill, control the solid content to be 55 - 60%, the mass ratio of balls to top - glaze raw materials is 1:2 - 1, ball - mill for 0.5 - 1 h, then add 2% kaolin and 1% sodium carboxymethyl cellulose based on the mass of the top - glaze raw materials, stir and ball - mill for 0.5 - 1 h to obtain the top - glaze slurry; Third step: Apply the bottom - glaze slurry on the ceramic biscuit body, let it air - dry naturally, then apply the top - glaze slurry, let it dry and then fire to obtain the color - changing purple - red glaze.

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