Colorful plaque crack glaze ceramic and preparation method thereof

Abstract

The invention relates to the field of ceramics, in particular to colored plaque crack glaze ceramic and a preparation method thereof.The ceramic comprises a green body, ground glaze and transparent cover glaze, the green body is covered with the ground glaze and the transparent cover glaze in sequence, and colored plaque particles are embedded into the ground glaze; comprising the following components: 30-40 parts of feldspar, 8-10 parts of quartz, 12-14 parts of kaolin, 5-8 parts of calcium carbonate, 4-5 parts of water glass and 3-4 parts of sodium carboxymethyl cellulose. The colorful patches are bottomed by black, the colorful patches are mixed with multicolor spots, and the water absorption material absorbs water around the ground coat in the drying process, so that micro-cracks are formed around the colorful patch particles, and a unique artistic effect is achieved; the sodium carboxymethyl cellulose can improve the viscosity of the glaze, so that thick glaze can be formed by glazing for many times, and the colorful plaque particles in the cover glaze can be better fused into the ground glaze and the transparent cover glaze.

Description

Technical Field

[0001] This invention relates to the field of ceramics, specifically to ring-shaped multicolored patchy crackle glaze ceramics and their preparation methods. Background Technology

[0002] Colored glazes are made by mixing raw materials containing coloring metallic elements with other components to form a glaze. After firing, the glaze displays beautiful colors. In modern ceramic production, coloring elements are often first formulated into pigments, which are then introduced into base glazes at different temperature ranges to create colored glazes. Alternatively, coloring oxides can be used directly in the formulation. The primary purpose of colored glazes is decoration; they are meant to be appreciated and allow people to experience the beauty of color. Currently, to achieve a speckled effect in ceramic glazes, colored glaze spots are typically painted on top of a transparent glaze and then fired. However, the same spot on the glaze surface usually only displays one color, resulting in a limited range of expressions. Furthermore, blending multiple colors together through layering multiple glazes requires extremely high precision in the painting, making mass production difficult. Additionally, flat painted spots lack a sense of three-dimensionality. Therefore, this project was developed. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems by using ring-colored patchy crackle glaze ceramics and their preparation methods.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a multicolored patch crackle glaze ceramic, characterized in that: it includes a body, a base glaze and a transparent top glaze sequentially covering the body, wherein multicolored patch particles are embedded in the base glaze, and the raw materials of the base glaze, by weight, include the following components: 30-40 parts feldspar, 8-10 parts quartz, 12-14 parts kaolin, 5-8 parts calcium carbonate, 4-5 parts water glass, and 3-4 parts sodium methyl cellulose.

[0005] Furthermore, the multicolored patch particles include pigment microparticles and a water-absorbing material for coating the color microparticles.

[0006] Furthermore, the raw materials of the absorbent material, by weight, include the following components: 10-12 parts of sodium polyacrylate absorbent resin.

[0007] Furthermore, the raw materials of the absorbent material, by weight, also include the following components: 5-8 parts glass powder, 3-5 parts starch, and 2-3 parts gelatin.

[0008] Furthermore, the pigment particles include azure particles, grass green particles, titanium red particles, and golden yellow particles.

[0009] Furthermore, the azure microparticles, by weight, comprise the following components: 50-60 parts calcium oxide, 5-8 parts glaze ash, 12-14 parts feldspar, 8-10 parts quartz, 2-3 parts zinc oxide, 5-6 parts barium carbonate, and 4-5 parts talc; the grass green microparticles, by weight, comprise the following components: 10-12 parts Suzhou clay, 15-18 parts spodumene, 5-6 parts quartz, 10-12 parts limestone, 8-10 parts chromium quartz sand powder, 2-3 parts praseodymium yellow pigment, and vanadium zirconium blue pigment. 3-4 parts; the titanium red microparticles, by weight, include the following components: 22-25 parts Datong clay, 25-28 parts potassium feldspar, 10-12 parts quartz, 14-15 parts limestone, 8-10 parts alkaline earth, 4-5 parts titanium dioxide, 2-3 parts green glass, and 2-3 parts copper oxide; the golden yellow microparticles, by weight, include the following components: 20-23 parts white clay, 10-12 parts gypsum, 8-12 parts calcite, 5-6 parts red lead, 7-8 parts purple clay, and 10-12 parts quartz.

[0010] Furthermore, the pigment microparticles also include fluorescent microparticles, the raw materials of which, by weight, include the following components: 10-12 parts quartz, 12-14 parts alumina, 20-23 parts calcium carbonate, 8-12 parts boric acid, 4-5 parts lithium carbonate, 6-8 parts cryolite, and 6-8 parts phosphor.

[0011] The preparation method of the above-mentioned ring-shaped multicolored patch crackle glaze ceramic includes the following steps:

[0012] Step a: Prepare the green body and fire it in the kiln.

[0013] Step b: Prepare multicolored patch particles, base glaze, and transparent top glaze;

[0014] Step c: Apply one or two base glazes to the body;

[0015] Step d: After evenly mixing the base glaze and the multicolored patch particles, continue applying the base glaze;

[0016] Step e: Let it stand and dry. During the drying process, the multicolored patch particles absorb the moisture around the base glaze. The base glaze around the multicolored patch particles dehydrates faster than other parts, resulting in a larger shrinkage rate of the base glaze around the multicolored patch particles than other parts, and micro-cracks are generated around it.

[0017] Step f: Apply a transparent glaze and allow it to dry.

[0018] Step g: Firing in a kiln at 1120 degrees Celsius. During the firing process, the water-absorbing material of the multicolored patches carbonizes, and some of it remains in the base glaze, becoming the base color of the multicolored patches. At the same time, the pigment particles of various colors melt and diffuse during the firing process, and intersect with each other to form multicolored patches with multiple colors blending together.

[0019] Furthermore, the preparation method of the multicolored patch particles is as follows: after mixing, high-temperature melting, cooling, crushing and sieving of various pigment microparticle raw materials, pigment microparticles with a diameter of 0.2-0.4 mm are prepared; the water-absorbing material and pigment microparticles of various colors are weighed according to a certain ratio, mixed and stirred, and then heated and kneaded by a high-speed kneader for 5-10 min, with the discharge material temperature below 50℃. Then, the material is extruded and shaped by a screw extruder, with the working temperature of the screw extruder being 140-150℃, and the cutting speed at the discharge end being adjusted to a particle length of 1-1.2 mm.

[0020] Furthermore, in step d, after uniformly mixing the base glaze and the multicolored patch particles, the method for applying the base glaze is as follows: the base glaze and the multicolored patch particles are added to a mixer and stirred. The bottom of the mixer is equipped with a glaze dripping nozzle. The blank is horizontally placed on the rotating shaft of the glaze dripping machine, and the blank is rotated and moved horizontally. The base glaze from the glaze dripping nozzle drips onto the blank.

[0021] As can be seen from the above description, the multicolored patch crack glaze ceramic and its preparation method provided by the present invention have the following beneficial effects: the multicolored patches are based on a black background and contain multicolored spots. During the drying process, the water-absorbing material absorbs the moisture around the base glaze, causing microcracks to form around the multicolored patch particles, resulting in a unique artistic effect; sodium methyl cellulose can increase the viscosity of the glaze, which helps to form a thick glaze through multiple glazing applications, allowing the multicolored patch particles in the surface glaze to better integrate into the base glaze and the transparent surface glaze. Detailed Implementation

[0022] The present invention will be further described below through specific embodiments.

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] This invention relates to a multi-colored patchwork crackle glaze ceramic, comprising a body, a base glaze and a transparent top glaze sequentially covering the body, wherein multi-colored patch particles are embedded within the base glaze. The raw materials of the base glaze, by weight, include the following components: 30-40 parts feldspar, 8-10 parts quartz, 12-14 parts kaolin, 5-8 parts calcium carbonate, 4-5 parts water glass, and 3-4 parts sodium methyl cellulose. The base glaze is formed by multiple glazing processes, resulting in a white base glaze with embedded multi-colored patches, creating a strong contrast. The multi-colored patches have a black base with interspersed multi-colored spots, unlike traditional single-point or single-color spots; they can display multi-colored spots within a single patch, creating a unique artistic effect. Sodium methyl cellulose increases the viscosity of the glaze, facilitating the formation of a thick glaze through multiple glazing processes, allowing the multi-colored patch particles in the top glaze to better integrate into the base glaze and the transparent top glaze.

[0025] The multicolored patch particles consist of pigment microparticles and a water-absorbing material used to coat the color microparticles. When these particles are added to the glaze, the various color microparticles burst open during firing, forming localized, multicolored spots. The color microparticles are protected by the water-absorbing material, which absorbs moisture from the surrounding glaze during drying, causing micro-cracks to form around the multicolored patch particles. The organic materials in the water-absorbing material blacken during glaze firing, forming black base spots. Therefore, after firing, the glaze surface presents an overall appearance: a white glaze base with multicolored patches distributed in the center, and these multicolored patches themselves having a black base. These patches contain microparticles of various colors, and the multicolored microparticles are formed through the melting of three-dimensional particles. Thus, the multicolored microparticles on the glaze surface have a three-dimensional effect, unlike flat painted glaze surfaces.

[0026] The raw materials for the absorbent material, by weight, include the following components: 10-12 parts of sodium polyacrylate absorbent resin, 5-8 parts of glass powder, 3-5 parts of starch, and 2-3 parts of gelatin.

[0027] The pigment particles include azure particles, grass green particles, titanium red particles, and golden yellow particles, with the proportions of each particle configured according to requirements.

[0028] The azure microparticles, by weight, include the following components: 50-60 parts calcium oxide, 5-8 parts glaze ash, 12-14 parts feldspar, 8-10 parts quartz, 2-3 parts zinc oxide, 5-6 parts barium carbonate, and 4-5 parts talc; the grass green microparticles, by weight, include the following components: 10-12 parts Suzhou clay, 15-18 parts spodumene, 5-6 parts quartz, 10-12 parts limestone, 8-10 parts chromium quartz sand powder, 2-3 parts praseodymium yellow pigment, and 3-4 parts vanadium zirconium blue pigment. The titanium red microparticles, by weight, include the following components: 22-25 parts Datong clay, 25-28 parts potassium feldspar, 10-12 parts quartz, 14-15 parts limestone, 8-10 parts alkaline earth, 4-5 parts titanium dioxide, 2-3 parts green glass, and 2-3 parts copper oxide. The golden yellow microparticles, by weight, include the following components: 20-23 parts white clay, 10-12 parts gypsum, 8-12 parts calcite, 5-6 parts red lead, 7-8 parts purple clay, and 10-12 parts quartz. These multicolored microparticles create a variety of colors during the glaze firing process, resulting in a unique aesthetic appeal as multiple colors intermingle within individual multicolored patches.

[0029] The pigment microparticles also include fluorescent microparticles. The raw materials for the fluorescent microparticles, by weight, include the following components: 10-12 parts quartz, 12-14 parts alumina, 20-23 parts calcium carbonate, 8-12 parts boric acid, 4-5 parts lithium carbonate, 6-8 parts cryolite, and 6-8 parts phosphor. The fluorescent microparticles give the multicolored patches a fluorescent effect.

[0030] The preparation method of ring-shaped multicolored patchy crackle glaze ceramics includes the following steps:

[0031] Step a: Prepare the green body and fire it in the kiln.

[0032] Step b: Prepare multicolored patch particles, base glaze, and transparent top glaze;

[0033] Step c: Apply one or two base glazes to the body, and apply glazes multiple times to form a thick base glaze;

[0034] Step d: After evenly mixing the base glaze and the multicolored patch particles, continue to apply the base glaze. Since the base glaze is relatively thick, it can better accommodate the multicolored patch particles. Of course, since the multicolored patch particles are relatively large, some of them cannot form a plane with the glaze surface and may protrude from the base glaze. In the subsequent firing, the various color particles in the multicolored patch particles diffuse and blend together to form multicolored patches with a three-dimensional texture.

[0035] Step e: Let it stand and dry. During the drying process, the multicolored patch particles absorb the moisture around the base glaze. The base glaze around the multicolored patch particles dehydrates faster than other parts, resulting in a larger shrinkage rate of the base glaze around the multicolored patch particles than other parts, and micro-cracks are generated around it.

[0036] Step f: Apply a transparent glaze and let it dry. The transparent glaze covers the base glaze and the multicolored patch particles, forming a transparent glaze layer on its surface.

[0037] Step g: Firing in a kiln at 1120 degrees Celsius. During firing, the water-absorbing material in the multicolored patch particles decomposes and carbonizes, with some remaining in the base glaze, becoming the background color of the multicolored patches. Simultaneously, the pigment particles of various colors melt and diffuse during firing, fusing with the base and top glazes to form various colored spots. These spots blend together, ultimately forming multicolored patches. Because the multicolored patch particles contain water-absorbing material, during the drying of the base glaze in step e, this material absorbs moisture from the surrounding glaze, causing cracks to form around the dried glaze. This results in a ring of cracks around the multicolored patches, creating a unique appearance after firing—a characteristic not found in existing speckled glazes.

[0038] The preparation method of multicolored patch particles is as follows: Various pigment microparticle raw materials are mixed, melted at high temperature, cooled, crushed, and sieved to produce pigment microparticles with a diameter of 0.2-0.4 mm. The absorbent material and pigment microparticles of various colors are weighted according to a specific ratio, mixed and stirred, and then kneaded using a high-speed kneader for 5-10 minutes at an outlet temperature below 50℃. The mixture is then extruded using a screw extruder with an operating temperature of 140-150℃ and the cutter speed at the outlet end adjusted to a particle length of 1-1.2 mm. The thickness of the base glaze should reach 2-2.5 mm after multiple glazing applications. Because the particle size of the multicolored patch particles is relatively large within the glaze surface, multiple layers of base glaze are required to form a thick glaze, embedding the multicolored patch particles within it. A transparent top glaze is then applied to further seal the multicolored patch particles within the glaze surface. The ratio of the total volume of various colored pigment microparticles to the absorbent material in the multicolored patch particles is 1:3-8.

[0039] In step d, after the base glaze and multicolored patch particles are evenly mixed, the method for applying the base glaze is as follows: add the base glaze and multicolored patch particles to a mixer and stir. The bottom of the mixer is equipped with a glaze dripping nozzle. Place the blank horizontally on the rotating shaft of the glaze dripping machine and drive the blank to rotate and move horizontally. The base glaze from the glaze dripping nozzle drips onto the blank. The mixer contains a stirrer that mixes the base glaze and multicolored patch particles, preventing the particles from settling or piling up. This ensures the multicolored patch particles are evenly distributed when applied to the ceramic body. The glazing machine has a rotating shaft with adjustable external support claws. These claws enter and fix the ceramic body through the bottle opening. The shaft is mounted on the glazing machine via a transverse feeding mechanism. During operation, the shaft rotates and moves, causing the ceramic body to rotate and move below the glazing nozzle. This evenly coats the ceramic body with the base glaze containing the multicolored patch particles. Furthermore, this glazing method creates ring-shaped stripes on the ceramic body, enhancing its aesthetic appeal. Because the water-absorbing material in the multicolored patch particles absorbs moisture from the glaze, the mixture of base glaze and multicolored patch particles in step d should be prepared and used immediately, and the same batch of mixture should not be used for more than half an hour.

[0040] The above are merely some specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A ceramic with a ring-shaped multicolored patchy crackle glaze, characterized in that: The product includes a body, a base glaze and a transparent top glaze applied sequentially to the body, wherein the base glaze contains embedded multicolored patch particles, and the raw materials of the base glaze, by weight, include the following components: 30-40 parts feldspar, 8-10 parts quartz, 12-14 parts kaolin, 5-8 parts calcium carbonate, 4-5 parts water glass, and 3-4 parts sodium methyl cellulose.

2. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 1, characterized in that: The colorful patch particles include pigment microparticles and a water-absorbing material used to coat the pigment microparticles.

3. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 1, characterized in that: The raw materials of the absorbent material, by weight, include the following components: 10-12 parts of sodium polyacrylate absorbent resin.

4. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 3, characterized in that: The raw materials of the absorbent material, by weight, also include the following components: 5-8 parts glass powder, 3-5 parts starch and 2-3 parts gelatin.

5. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 1, characterized in that: The pigment particles are one or more of the following: azure particles, grass green particles, titanium red particles, and golden yellow particles.

6. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 1, characterized in that: The azure microparticles, by weight, comprise the following components: 50-60 parts calcium oxide, 5-8 parts glaze ash, 12-14 parts feldspar, 8-10 parts quartz, 2-3 parts zinc oxide, 5-6 parts barium carbonate, and 4-5 parts talc; the grass green microparticles, by weight, comprise the following components: 10-12 parts Suzhou clay, 15-18 parts spodumene, 5-6 parts quartz, 10-12 parts limestone, 8-10 parts chromium quartz sand powder, 2-3 parts praseodymium yellow pigment, and 3-4 parts vanadium zirconium blue pigment. The titanium red microparticles, by weight, comprise the following components: 22-25 parts Datong clay, 25-28 parts potassium feldspar, 10-12 parts quartz, 14-15 parts limestone, 8-10 parts alkaline earth, 4-5 parts titanium dioxide, 2-3 parts green glass, and 2-3 parts copper oxide; the golden yellow microparticles, by weight, comprise the following components: 20-23 parts white clay, 10-12 parts gypsum, 8-12 parts calcite, 5-6 parts red lead, 7-8 parts purple clay, and 10-12 parts quartz.

7. The ring-shaped multicolored patchy crackle glaze ceramic according to claim 1, characterized in that: The pigment microparticles also include fluorescent microparticles, and the raw materials of the fluorescent microparticles, by weight, include the following components: 10-12 parts quartz, 12-14 parts alumina, 20-23 parts calcium carbonate, 8-12 parts boric acid, 4-5 parts lithium carbonate, 6-8 parts cryolite, and 6-8 parts phosphor.

8. The method for preparing ring-shaped multicolored patchy crackle glaze ceramics according to claims 1-7, characterized in that, Includes the following steps: Step a: Prepare the green body and fire it in the kiln. Step b: Prepare multicolored patch particles, base glaze, and transparent top glaze; Step c: Apply one or two base glazes to the body; Step d: After evenly mixing the base glaze and the multicolored patch particles, continue applying the base glaze; Step e: Let it stand and dry. During the drying process, the multicolored patch particles absorb the moisture around the base glaze. The base glaze around the multicolored patch particles dehydrates faster than other parts, resulting in a larger shrinkage rate of the base glaze around the multicolored patch particles than other parts, and micro-cracks are generated around it. Step f: Apply a transparent glaze and allow it to dry. Step g: Firing in a kiln at 1120 degrees Celsius. During the firing process, the water-absorbing material of the multicolored patches carbonizes, and some of it remains in the base glaze, becoming the base color of the multicolored patches. At the same time, the pigment particles of various colors melt and diffuse during the firing process, and intersect with each other to form multicolored patches with multiple colors blending together.

9. The method for preparing ring-shaped multicolored patchy crackle glaze ceramic according to claim 8, characterized in that: The preparation method of the multicolored patch particles is as follows: after mixing, high-temperature melting, cooling, crushing and sieving of various pigment microparticle raw materials, pigment microparticles with a diameter of 0.2-0.4 mm are made; the water-absorbing material and pigment microparticles of various colors are weighed according to the proportion, mixed and stirred, and then heated and kneaded by a high-speed kneader for 5-10 minutes, with the discharge material temperature below 50℃. Then, the material is extruded and shaped by a screw extruder, with the working temperature of the screw extruder being 140-150℃, and the cutting speed at the discharge end being adjusted to a particle length of 1-1.2 mm.

10. The method for preparing the ring-shaped multicolored patchy crackle glaze ceramic according to claim 8, characterized in that: In step d, after the base glaze and multicolored patch particles are evenly mixed, the method for applying the base glaze is as follows: the base glaze and multicolored patch particles are added to a mixer and stirred. The bottom of the mixer is equipped with a glaze dripping nozzle. The blank is placed horizontally on the rotating shaft of the glaze dripping machine, and the blank is rotated and moved horizontally. The base glaze from the glaze dripping nozzle drips onto the blank.