A high-stability yellow-on-red color material and its application method

Abstract

The present invention belongs to the technical field of ceramic decorative pigments, and specifically relates to a high-stability yellow-on-red colorant and an application method thereof. The colorant includes two colorants: a yellow glaze and a red glaze; the yellow glaze includes the following raw material components in parts by weight: 40-50 parts of iron oxide, 5-10 parts of tin oxide, 5-10 parts of nano-silicon oxide, 10-15 parts of feldspar, 10-15 parts of clay, 2-5 parts of glass fiber, 2-3 parts of lithium fluoride, and 30-40 parts of water; the red glaze includes the following raw material components in parts by weight: 55-65 parts of alum red, 5-8 parts of alum stone, 5-10 parts of silicate, 8-10 parts of gypsum, 8-10 parts of white clay, 5-10 parts of nano-alumina, 10-15 parts of frankincense oil, and 30-40 parts of water. The present invention is designed and applied separately, has good stability, does not react after use, has bright color, strong adhesion, and is not easy to fall off. Combining it with the new yellow-on-red process effectively improves the porcelain yield.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramic decorative pigments, and particularly relates to a high-stability yellow-on-red color material and an application method thereof. Background Art

[0002] The Huang-on-Red technique, a Ming Dynasty imperial craft and a vital legacy of traditional culture, is now nearly extinct. Huang-on-Red, produced by layering two pigments, offers a more aesthetically pleasing effect than single pigments, boasting richer layers, a stronger expressiveness, a thickness, and a pleasant feel. Huang-on-Red's aesthetic and elegant elegance are highly sought after by high-end ceramic users.

[0003] Because the yellow-on-red technique involves the superposition of two pigments, delicate yellow and alum red, which react with each other and can only be fired at low temperatures, the resulting effect is unstable, the pigments easily flake off, and the porcelain yield is extremely low. This problem has remained unresolved since the creation of the yellow-on-red technique in the Ming Dynasty.

[0004] Therefore, the development of a new yellow-on-red color material with high stability is expected to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-stability yellow-on-red color material and an application method thereof. The yellow-on-red color material is applied and designed separately, has good stability, does not react after use, has bright color, strong adhesion, and is not easy to fall off. Combining it with the new yellow-on-red process effectively improves the porcelain yield.

[0006] To achieve the above object, the present invention provides a high-stability yellow-on-red colorant, the colorant comprising two colorants: yellow glaze and red glaze; the yellow glaze comprising the following raw material components in parts by weight: 40-50 parts of iron oxide, 5-10 parts of tin oxide, 5-10 parts of nano-silicon oxide, 10-15 parts of feldspar, 10-15 parts of clay, 2-5 parts of glass fiber, 2-3 parts of lithium fluoride, and 30-40 parts of water;

[0007] The red glaze comprises the following raw material components in parts by weight: 55-65 parts of alum red, 5-8 parts of alum stone, 5-10 parts of silicate, 8-10 parts of gypsum, 8-10 parts of white clay, 5-10 parts of nano-alumina, 10-15 parts of frankincense oil and 30-40 parts of water.

[0008] The materials in this technical solution are divided into yellow glaze colorant and red glaze colorant. Due to the particularity of the ceramic preparation process used, the two need to be separately prepared and used. The yellow glaze is directly coated on the blank body. It must not only have a close bond with the blank body and resist cracking, but also the yellow color, as a theme decoration, needs to have a certain brightness. The present invention uses iron oxide as a colorant and tin oxide to improve and adjust its color tone and gloss; nano silicon oxide improves its high temperature resistance; feldspar as a flux can also improve tensile strength; clay as a base material provides the viscosity and plasticity of the glaze, and improves the adhesion of the glaze to the surface of the ceramic body; glass fiber reduces thermal expansion to prevent cracking and discoloration, and improves firmness; lithium fluoride accelerates the solid phase reaction rate and promotes diffusion. The red glaze is covered on the surface of the yellow glaze to highlight the yellow color. Alum red is generally used as a pigment. However, since the firing temperature of alum red is generally between 600-900°C, the colored porcelain fired at high temperature is more stable and lustrous. In order to improve the stability and color of the red glaze, the present invention uses alum red as the main colorant and adds a small amount of alum stone to improve the color and stability of the red glaze; adds silicate to improve its high temperature resistance and chemical stability; adds gypsum to improve the density and stability of the glaze layer, and at the same time can adjust the fluidity and viscosity of the glaze to make the glaze surface smoother and more uniform; white clay improves the adhesion of the glaze layer and reduces the phenomenon of glaze peeling and cracking; nano-alumina further improves its high temperature resistance; and frankincense oil as a pigment binder can help the pigment better adhere to the glaze layer, prevent the pigment from falling off or flowing, and at the same time maintain the brightness and stability of the pigment.

[0009] Furthermore, in the above technical solution, the preparation method of the yellow glaze is: prepare the raw materials according to the formula, first crush the block material to below 60 mesh, then mix the iron oxide, tin oxide, nano-silicon oxide, and feldspar, place the mixture in a 1200°C oxygen-free melting furnace for 1-2 hours, and then crush it to below 80 mesh after water quenching; finally, grind the crushed mixture, clay, glass fiber, lithium fluoride, and water under oxygen-free conditions for 4-6 hours, and pass it through a 200-mesh sieve to obtain the yellow glaze.

[0010] Furthermore, in the above technical solution, the preparation method of the red glaze is: prepare the raw materials according to the formula, first crush the block material to below 60 mesh, then mix the alum stone, silicate, gypsum and white clay, place the mixture in a 1200℃ oxygen-free smelting furnace for 1-2 hours, quench with water and crush to below 80 mesh to obtain a crushed material; then mix the alum red, nano-alumina and water under anaerobic conditions and ball mill for 5-10 hours to obtain a ball-milled mixture; finally, grind the crushed material, ball-milled mixture and frankincense oil under anaerobic conditions for 4-6 hours, and pass through a 200-mesh sieve to obtain the red glaze.

[0011] Furthermore, in the above technical solution, the silicate is sodium silicate or magnesium silicate; and the ball-to-material ratio is 4-5:1.

[0012] The present invention also provides an application method of a high-stability yellow-on-red color material, comprising the following steps:

[0013] (1) Allow the pre-prepared green body to dry naturally and set aside;

[0014] (2) Use a water sprayer to evenly spray a layer of water mist on the surface of the blank, let it stand for 5-10 minutes, and then use a glaze spray pot to evenly spray the yellow glaze directly on the surface of the blank, and let it dry naturally;

[0015] (3) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain body;

[0016] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze outside the pattern with red glaze and let it dry naturally;

[0017] (5) The red-glazed body is placed in a kiln for high-temperature firing and cooling to obtain yellow-on-red colored porcelain. In this technical solution, the body is first moistened with water mist before the yellow glaze is applied. This prevents the yellow glaze from clumping due to the rapid infiltration of moisture into the body, and facilitates the slow penetration of the yellow glaze, resulting in better uniformity.

[0018] Furthermore, in step (2) of the above technical solution, the water mist is sprayed to a thickness of 2-2.5 mm without forming droplets.

[0019] Furthermore, in step (3) of the above technical solution, the firing and molding process is as follows: first, the temperature is raised to 500±20℃ at a rate of 2-3℃ / min, and kept at this temperature for 1-2h; then, the temperature is further raised to 850±20℃ at a rate of 3-4℃ / min and kept at this temperature for 2-4h; finally, the temperature is further raised to 1250±20℃ at a rate of 6-8℃ / min and kept at this temperature for 2-3h. In this technical solution, the temperature is first slowly raised to 500℃, which can first remove the moisture in the body, and then the temperature is raised to 850℃ to melt the lithium fluoride, which can promote the rapid diffusion of the yellow glaze, fill the pores generated by the evaporation of water, and improve the uniformity and flatness. Finally, high-temperature firing is used for solidification, thereby improving the brightness and stability of the yellow glaze.

[0020] Furthermore, in step (4) of the above technical solution, the red glaze covering thickness is 1-1.5 mm.

[0021] Furthermore, in step (5) of the above technical solution, the high-temperature firing temperature is 1200-1300°C; and the cooling is natural cooling to room temperature. In this technical solution, the glaze layer directly fired at high temperature has good stability, bright color, and beautiful appearance.

[0022] The present invention also provides yellow-on-red colored porcelain prepared by the application method.

[0023] The preparation processes not specifically described in the present invention are all conventional processes.

[0024] The present invention has the following beneficial effects:

[0025] According to historical records, the ancient yellow-on-red process required three kiln trips to complete firing, and high-temperature firing was not possible, resulting in poor glaze stability and easy peeling. The present invention adjusts the raw material ratio of yellow and red glazes used in the yellow-on-red process and performs precise preparation to effectively improve the stability of the colorant. It also optimizes the colored porcelain preparation process, requiring only two kiln trips to complete firing. The resulting colored porcelain is not only bright and vibrant in color, but also does not peel, and has a high yield rate, greatly simplifying the preparation process. DETAILED DESCRIPTION

[0026] The experimental methods in the following examples are conventional methods unless otherwise specified. The raw materials involved in the following examples are common commercial products and can be purchased from the market unless otherwise specified.

[0027] The present invention is described in further detail below in conjunction with the embodiments:

[0028] Example 1

[0029] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The yellow glaze comprises the following raw material components in parts by weight: 40 parts of iron oxide, 5 parts of tin oxide, 5 parts of nano-silicon oxide, 10 parts of feldspar, 10 parts of clay, 2 parts of glass fiber, 2 parts of lithium fluoride, and 30 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 1 hour, quenching with water, and then crushing the mixture to a size below 80 mesh; finally, grinding the crushed mixture, clay, glass fiber, lithium fluoride, and water in an oxygen-free environment for 5 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0030] The red glaze comprises the following raw material components in parts by weight: 55 parts of alum red, 5 parts of alum stone, 5 parts of magnesium silicate, 8 parts of gypsum, 10 parts of kaolin, 5 parts of nano-alumina, 10 parts of frankincense oil, and 30 parts of water. The preparation method comprises the following steps: preparing the raw materials according to the formula, first crushing the block material to below 60 mesh, then mixing the alum stone, silicate, gypsum, and kaolin, smelting the mixture in an oxygen-free smelting furnace at 1200° C. for 1 hour, quenching with water, and crushing the mixture to below 80 mesh to obtain a crushed material; then mixing the alum red, nano-alumina, and water under oxygen-free conditions at a ball-to-material ratio of 5:1, and ball-milling for 6 hours to obtain a ball-milled mixture; finally, grinding the crushed material, the ball-milled mixture, and frankincense oil under oxygen-free conditions for 5 hours, and filtering through a 200-mesh sieve to obtain the red glaze.

[0031] Example 2

[0032] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze; the yellow glaze comprises the following raw material components in parts by weight: 45 parts of iron oxide, 8 parts of tin oxide, 8 parts of nano-silicon oxide, 12 parts of feldspar, 12 parts of clay, 4 parts of glass fiber, 3 parts of lithium fluoride, and 35 parts of water; and a preparation method comprising: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 2 hours, quenching with water, and then crushing the mixture to a size below 80 mesh; and finally grinding the crushed mixture, clay, glass fiber, lithium fluoride, and water in an oxygen-free environment for 6 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0033] The red glaze comprises the following raw material components in parts by weight: 60 parts of alum red, 6 parts of alum stone, 8 parts of magnesium silicate, 9 parts of gypsum, 9 parts of white clay, 8 parts of nano-alumina, 12 parts of frankincense oil, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to the formula, first crushing the block material to below 60 mesh, then mixing the alum stone, silicate, gypsum, and white clay, smelting the mixture in an oxygen-free smelting furnace at 1200° C. for 2 hours, quenching with water, and crushing the mixture to below 80 mesh to obtain a crushed material; then mixing the alum red, nano-alumina, and water under oxygen-free conditions at a ball-to-material ratio of 5:1, and ball-milling for 8 hours to obtain a ball-milled mixture; finally, grinding the crushed material, the ball-milled mixture, and frankincense oil under oxygen-free conditions for 6 hours, and passing through a 200-mesh sieve to obtain the red glaze.

[0034] Example 3

[0035] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The yellow glaze comprises the following raw material components in parts by weight: 50 parts of iron oxide, 10 parts of tin oxide, 10 parts of nano-silicon oxide, 15 parts of feldspar, 15 parts of clay, 5 parts of glass fiber, 3 parts of lithium fluoride, and 40 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 2 hours, quenching with water, and crushing the mixture to a size below 80 mesh; finally, grinding the crushed mixture, clay, glass fiber, lithium fluoride, and water in an oxygen-free environment for 6 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0036] The red glaze comprises the following raw material components in parts by weight: 65 parts of alum red, 8 parts of alum stone, 10 parts of sodium silicate, 10 parts of gypsum, 10 parts of kaolin, 10 parts of nano-alumina, 15 parts of frankincense oil, and 40 parts of water. The preparation method comprises the following steps: preparing the raw materials according to the formula, first crushing the block material to below 60 mesh, then mixing the alum stone, silicate, gypsum, and kaolin, smelting the mixture in an oxygen-free smelting furnace at 1200° C. for 2 hours, quenching with water, and crushing the mixture to below 80 mesh to obtain a crushed material; then mixing the alum red, nano-alumina, and water under oxygen-free conditions at a ball-to-material ratio of 5:1, and ball-milling for 10 hours to obtain a ball-milled mixture; finally, grinding the crushed material, the ball-milled mixture, and frankincense oil under oxygen-free conditions for 4 hours, and filtering through a 200-mesh sieve to obtain the red glaze.

[0037] Example 4

[0038] A method for applying a high-stability yellow-on-red color material comprises the following steps:

[0039] (1) Allow the pre-prepared green body to dry naturally and set aside;

[0040] (2) Use a water sprayer to evenly spray a layer of water mist on the surface of the green body until no drops form. Let it stand for 5 minutes. Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 directly on the surface of the green body to a thickness of 2 mm and let it dry naturally.

[0041] (3) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain green body; the firing and molding process is as follows: first, the temperature is raised to 500±20℃ at a rate of 2℃ / min and kept at this temperature for 1 hour; then, the temperature is further raised to 850±20℃ at a rate of 3℃ / min and kept at this temperature for 2 hours; finally, the temperature is further raised to 1250±20℃ at a rate of 6℃ / min and kept at this temperature for 2 hours;

[0042] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1 mm and let it dry naturally;

[0043] (5) The body coated with red glaze is placed in a kiln and fired at 1200°C for 10 hours. After cooling, a yellow-on-red colored porcelain is obtained.

[0044] Example 5

[0045] A method for applying a high-stability yellow-on-red color material comprises the following steps:

[0046] (1) Allow the pre-prepared green body to dry naturally and set aside;

[0047] (2) Use a water sprayer to evenly spray a layer of water mist on the surface of the green body until no drops form. Let it stand for 8 minutes. Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 directly on the surface of the green body to a thickness of 2.5 mm and let it dry naturally.

[0048] (3) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain green body; the firing and molding process is as follows: first, the temperature is raised to 500±20℃ at a rate of 3℃ / min and kept at this temperature for 2h; then, the temperature is continued to be raised to 850±20℃ at a rate of 4℃ / min and kept at this temperature for 3h; finally, the temperature is continued to be raised to 1250±20℃ at a rate of 7℃ / min and kept at this temperature for 3h;

[0049] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1.5 mm and let it dry naturally;

[0050] (5) The red glazed body is placed in a kiln and fired at 1250°C for 9 hours. After cooling, a yellow-on-red colored porcelain is obtained.

[0051] Example 6

[0052] A method for applying a high-stability yellow-on-red color material comprises the following steps:

[0053] (1) Allow the pre-prepared green body to dry naturally and set aside;

[0054] (2) Use a water sprayer to evenly spray a layer of water mist onto the surface of the green body until no drops form. Let it stand for 10 minutes. Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 onto the surface of the green body to a thickness of 2.5 mm. Let it dry naturally.

[0055] (3) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain green body; the firing and molding process is as follows: first, the temperature is raised to 500±20℃ at a rate of 2℃ / min and kept at this temperature for 1 hour; then, the temperature is continued to be raised to 850±20℃ at a rate of 4℃ / min and kept at this temperature for 4 hours; finally, the temperature is continued to be raised to 1250±20℃ at a rate of 8℃ / min and kept at this temperature for 3 hours;

[0056] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1.5 mm and let it dry naturally;

[0057] (5) The body coated with red glaze is placed in a kiln and fired at 1300°C for 10 hours. After cooling, a yellow-on-red colored porcelain is obtained.

[0058] Comparative Example 1

[0059] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze; the yellow glaze comprises the following raw material components in parts by weight: 45 parts of iron oxide, 8 parts of tin oxide, 12 parts of feldspar, 12 parts of clay, 4 parts of glass fiber, 3 parts of lithium fluoride, and 35 parts of water; the preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 2 hours, quenching with water, and then crushing the mixture to a size below 80 mesh; finally, grinding the crushed mixture, clay, glass fiber, lithium fluoride, and water in an oxygen-free environment for 6 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0060] The raw materials and preparation method of red glaze are the same as those in Example 2.

[0061] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0062] Comparative Example 2

[0063] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze; the yellow glaze comprises the following raw material components in parts by weight: 45 parts of iron oxide, 8 parts of tin oxide, 8 parts of nano-silicon oxide, 12 parts of feldspar, 12 parts of clay, 3 parts of lithium fluoride, and 35 parts of water; the preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 2 hours, quenching with water, and then crushing the mixture to a size below 80 mesh; finally, grinding the crushed mixture, clay, lithium fluoride, and water in an oxygen-free environment for 6 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0064] The raw materials and preparation method of red glaze are the same as those in Example 2.

[0065] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0066] Comparative Example 3

[0067] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The yellow glaze comprises the following raw material components in parts by weight: 45 parts of iron oxide, 8 parts of tin oxide, 8 parts of nano-silicon oxide, 12 parts of feldspar, 12 parts of clay, 4 parts of glass fiber, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free furnace at 1200°C for 2 hours, quenching with water, and then crushing the mixture to a size below 80 mesh; finally, grinding the crushed mixture, clay, glass fiber, and water in an oxygen-free environment for 6 hours, and filtering through a 200-mesh sieve to obtain the yellow glaze.

[0068] The raw materials and preparation method of red glaze are the same as those in Example 2.

[0069] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0070] Comparative Example 4

[0071] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze; the yellow glaze comprises the following raw material components in parts by weight: 45 parts of iron oxide, 8 parts of tin oxide, 12 parts of feldspar, 12 parts of clay, 4 parts of glass fiber, 3 parts of lithium fluoride, and 35 parts of water; and a preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to below 80 mesh, then grinding the iron oxide, tin oxide, feldspar, clay, glass fiber, lithium fluoride, and water in an oxygen-free environment for 6 hours, and filtering the mixture through a 200-mesh sieve to obtain the yellow glaze.

[0072] The raw materials and preparation method of red glaze are the same as those in Example 2.

[0073] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0074] Comparative Example 5

[0075] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze; the red glaze is alum red, which is obtained by mixing and evenly blending with water of the same volume.

[0076] The raw materials and preparation method of yellow glaze are the same as those in Example 2.

[0077] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0078] Comparative Example 6

[0079] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The red glaze comprises the following raw material components in parts by weight: 60 parts of alum red, 6 parts of alum stone, 8 parts of magnesium silicate, 9 parts of white clay, 8 parts of nano-alumina, 12 parts of frankincense oil, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to a size below 60 mesh, then mixing the alum stone, silicate, and white clay, smelting the mixture in an oxygen-free smelting furnace at 1200°C for 2 hours, quenching with water, and crushing the mixture to a size below 80 mesh to obtain a ground material; then mixing the alum red, nano-alumina, and water in an oxygen-free environment at a ball-to-material ratio of 5:1, and ball-milling the mixture for 8 hours to obtain a ball-milled mixture; finally, grinding the ground material, the ball-milled mixture, and the frankincense oil in an oxygen-free environment for 6 hours, and filtering the mixture through a 200-mesh sieve to obtain the red glaze.

[0080] The raw materials and preparation method of yellow glaze are the same as those in Example 2.

[0081] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0082] Comparative Example 7

[0083] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The red glaze comprises the following raw material components in parts by weight: 60 parts of alum red, 6 parts of alum stone, 8 parts of magnesium silicate, 9 parts of gypsum, 8 parts of nano-alumina, 12 parts of frankincense oil, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing a block material to a size below 60 mesh, then mixing the alum stone, silicate, and gypsum, smelting the mixture in an oxygen-free smelting furnace at 1200°C for 2 hours, quenching with water, and crushing the mixture to a size below 80 mesh to obtain a ground material; then mixing the alum red, nano-alumina, and water in an oxygen-free environment at a ball-to-material ratio of 5:1, and ball-milling the mixture for 8 hours to obtain a ball-milled mixture; finally, grinding the ground material, the ball-milled mixture, and frankincense oil in an oxygen-free environment for 6 hours, and filtering the mixture through a 200-mesh sieve to obtain the red glaze.

[0084] The raw materials and preparation method of yellow glaze are the same as those in Example 2.

[0085] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0086] Comparative Example 8

[0087] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The red glaze comprises the following raw material components in parts by weight: 60 parts of alum red, 6 parts of alum stone, 8 parts of magnesium silicate, 9 parts of gypsum, 9 parts of white clay, 12 parts of frankincense oil, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to below 60 mesh, then mixing the alum stone, silicate, gypsum, and white clay, smelting the mixture in an oxygen-free smelting furnace at 1200°C for 2 hours, quenching with water, and crushing the mixture to below 80 mesh to obtain a ground material; then mixing the alum red and water under oxygen-free conditions at a ball-to-material ratio of 5:1, and ball-milling the mixture for 8 hours to obtain a ball-milled mixture; finally, grinding the ground material, the ball-milled mixture, and the frankincense oil under oxygen-free conditions for 6 hours, and filtering the mixture through a 200-mesh sieve to obtain the red glaze.

[0088] The raw materials and preparation method of yellow glaze are the same as those in Example 2.

[0089] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0090] Comparative Example 9

[0091] A high-stability yellow-on-red color material comprises two colorants: yellow glaze and red glaze. The red glaze comprises the following raw material components in parts by weight: 60 parts of alum red, 6 parts of alum stone, 8 parts of magnesium silicate, 9 parts of gypsum, 9 parts of white clay, 8 parts of nano-alumina, 12 parts of frankincense oil, and 35 parts of water. The preparation method comprises the following steps: preparing the raw materials according to a formula, first crushing the block material to below 80 mesh, then mixing the alum stone, silicate, gypsum, and white clay, grinding the alum red, nano-alumina, water, and frankincense oil under anaerobic conditions for 6 hours, and filtering the mixture through a 200-mesh sieve to obtain the red glaze.

[0092] The raw materials and preparation method of yellow glaze are the same as those in Example 2.

[0093] When preparing yellow-on-red colored porcelain, the method of Example 5 is adopted.

[0094] Comparative Example 10

[0095] A method for applying a high-stability yellow-on-red colorant, wherein the colorant is prepared by the method of Example 2, comprising the following steps:

[0096] (1) Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 onto the surface of the pre-prepared green body to a thickness of 2.5 mm and allow to dry naturally;

[0097] (2) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain green body; the firing and molding process is as follows: first, the temperature is raised to 500±20℃ at a rate of 3℃ / min and kept at this temperature for 2 hours; then, the temperature is further raised to 850±20℃ at a rate of 4℃ / min and kept at this temperature for 3 hours; finally, the temperature is further raised to 1250±20℃ at a rate of 7℃ / min and kept at this temperature for 3 hours;

[0098] (3) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1.5 mm and let it dry naturally;

[0099] (4) The red glazed body is placed in a kiln and fired at 1250°C for 9 hours. After cooling, a yellow-on-red colored porcelain is obtained.

[0100] Comparative Example 11

[0101] A method for applying a high-stability yellow-on-red colorant, wherein the colorant is prepared by the method of Example 2, comprising the following steps:

[0102] (1) Allow the pre-prepared green body to dry naturally and set aside;

[0103] (2) Use a water sprayer to evenly spray a layer of water mist on the surface of the green body until no drops form. Let it stand for 8 minutes. Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 directly on the surface of the green body to a thickness of 2.5 mm and let it dry naturally.

[0104] (3) The dried green body is sent into the kiln and fired at a high temperature of 1250±20℃ for 3 hours to obtain a yellow glaze porcelain body;

[0105] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1.5 mm and let it dry naturally;

[0106] (5) The red glazed body is placed in a kiln and fired at 1250°C for 9 hours. After cooling, a yellow-on-red colored porcelain is obtained.

[0107] Comparative Example 12

[0108] A method for applying a high-stability yellow-on-red colorant, wherein the colorant is prepared by the method of Example 2, comprising the following steps:

[0109] (1) The pre-prepared green body is naturally dried, sent into a kiln at 1300℃ for firing for 6 hours, and naturally cooled to obtain a green body;

[0110] (2) Use a glaze spray pot to evenly spray the yellow glaze prepared in Example 2 onto the surface of the blank to a thickness of 2.5 mm and allow to dry naturally;

[0111] (3) The dried green body is placed in a kiln and fired at 850±20℃ for 3h to obtain a yellow glaze porcelain body;

[0112] (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze other than the pattern with the red glaze prepared in Example 2 to a thickness of 1.5 mm and let it dry naturally;

[0113] (5) The body coated with red glaze is sent into a kiln and fired at 900°C for 9 hours. After cooling, yellow-on-red colored porcelain is obtained.

[0114] Test Example 1

[0115] The performance of the color materials prepared in Examples 1-3 was tested, and the results are shown in Table 1.

[0116] Table 1 Color material properties

[0117]

[0118] As can be seen from Table 1, the color material obtained by the formula and preparation method of the present invention has bright color, good fluidity, no bubbles, high temperature resistance and good overall performance.

[0119] Test Example 2

[0120] Performance testing of the yellow-on-red colored porcelain prepared in Examples 4-6 and Comparative Examples 1-12 was conducted, with the results shown in Table 2. Glossiness was measured directly using a gloss meter, with the sample tested at a projection angle of 60°. Thermal stability was tested by placing the colored porcelain in a circuit, heating it to 200°C, holding it for 20 minutes, then quickly immersing it in 25°C water. After 10 minutes, the porcelain was removed, dried, and the surface condition observed. The yield rate was calculated as follows: Yield Rate (%) = (Total Production Quantity - Degraded Quantity) * 100 / Total Production Quantity. Product degradation criteria were as follows: ① Pinholes or prickles with a diameter greater than 0.5 mm and a total number greater than 5 per square meter; ② Cracking; ③ The boundary between the yellow and red glazes was unclear; and ④ The glaze layer was peeling.

[0121] Table 2 Performance test results

[0122]

[0123] As can be seen from the results in Table 2, the color materials prepared by the color material formula and preparation method of the present invention and the application method of the present invention can obtain yellow-on-red colored porcelain with good gloss, bright yellow and red, clear boundaries, layering, no color material peeling, beautiful appearance, and high yield.

[0124] In comparative examples 1-4, due to the different raw materials and preparation methods of yellow glaze, both the color and glaze effect are affected, especially the yield rate is greatly reduced; in comparative examples 5-9, the red glaze is directly fired with alum red at high temperature, and the yield rate is greatly reduced, mainly because the color fades severely, affecting the effect; and other raw material changes or different preparation methods also directly affect the glaze effect and yield rate; in comparative examples 10-11, directly spraying yellow glaze on the blank affects its uniformity and adhesion. After spraying the yellow glaze, it is directly heated to high temperature, with many pinholes and is not smooth, and the yield rate is greatly reduced; comparative example 12 is a traditional application process, with three times of kiln entry and two medium-temperature firings, the smoothness is greatly reduced, and the material is easy to peel off, and the yield rate is low.

[0125] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high stability yellow-on-red color material, characterized in that: The color material includes two colorants: yellow glaze and red glaze; the yellow glaze includes the following raw material components in parts by weight: 40-50 parts of iron oxide, 5-10 parts of tin oxide, 5-10 parts of nano-silicon oxide, 10-15 parts of feldspar, 10-15 parts of clay, 2-5 parts of glass fiber, 2-3 parts of lithium fluoride, and 30-40 parts of water; The red glaze comprises the following raw material components in parts by weight: 55-65 parts of alum red, 5-8 parts of alum stone, 5-10 parts of silicate, 8-10 parts of gypsum, 8-10 parts of white clay, 5-10 parts of nano-alumina, 10-15 parts of frankincense oil and 30-40 parts of water.

2. The high stability yellow-on-red color material according to claim 1, characterized in that: The yellow glaze is prepared by preparing raw materials according to a formula, first crushing the block material to less than 60 mesh, then mixing iron oxide, tin oxide, nano-silicon oxide, and feldspar, smelting the mixture in an oxygen-free smelting furnace at 1200° C. for 1-2 hours, quenching with water, and then crushing the mixture to less than 80 mesh; finally, grinding the crushed mixture, clay, glass fiber, lithium fluoride, and water under oxygen-free conditions for 4-6 hours, and passing through a 200-mesh sieve to obtain the yellow glaze.

3. The high stability yellow-on-red color material according to claim 1, characterized in that: The red glaze is prepared by preparing raw materials according to a formula, first crushing the block material to less than 60 mesh, then mixing alum stone, silicate, gypsum and white clay, placing the mixture in an oxygen-free smelting furnace at 1200° C. for 1-2 hours, quenching with water and crushing it to less than 80 mesh to obtain a crushed material; then mixing alum red, nano-alumina and water under oxygen-free conditions and ball-milling for 5-10 hours to obtain a ball-milled mixture; finally, grinding the crushed material, the ball-milled mixture and frankincense oil under oxygen-free conditions for 4-6 hours, and passing through a 200-mesh sieve to obtain the red glaze.

4. The high stability yellow-on-red color material according to claim 3, characterized in that: The silicate is sodium silicate or magnesium silicate; the ball-to-material ratio is 4-5:

1.

5. A method for applying the high-stability yellow-on-red color material according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) Allow the pre-prepared green body to dry naturally and set aside; (2) Use a water sprayer to evenly spray a layer of water mist on the surface of the blank, let it stand for 5-10 minutes, and then use a glaze spray pot to evenly spray the yellow glaze directly on the surface of the blank, and let it dry naturally; (3) The dried green body is sent into a kiln and fired in a reducing atmosphere to obtain a yellow glaze porcelain body; (4) Use a red pen to outline the desired pattern on the surface of the cooled yellow glaze porcelain body, then cover the yellow glaze outside the pattern with red glaze and let it dry naturally; (5) The body coated with red glaze is sent into a kiln for high-temperature firing and cooling to obtain yellow-on-red colored porcelain.

6. The application method according to claim 5, characterized in that: In step (2), the water mist is sprayed without forming drops, and the thickness of the yellow glaze spray is 2-2.5 mm.

7. The application method according to claim 5, characterized in that: In step (3), the firing process is as follows: first, the temperature is raised to 500±20℃ at a rate of 2-3℃ / min, and the temperature is kept at this temperature for 1-2 hours; then, the temperature is continued to be raised to 850±20℃ at a rate of 3-4℃ / min and the temperature is kept at this temperature for 2-4 hours; finally, the temperature is continued to be raised to 1250±20℃ at a rate of 6-8℃ / min and the temperature is kept at this temperature for 2-3 hours.

8. The application method according to claim 5, characterized in that: In step (4), the red glaze covering thickness is 1-1.5 mm.

9. The application method according to claim 5, characterized in that: In step (5), the high temperature firing temperature is 1200-1300°C for 8-10 hours; and the cooling is performed naturally to room temperature.

10. A yellow-on-red colored porcelain prepared by the application method according to any one of claims 5 to 9.

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