Ceramics with concave-convex texture and pattern and preparation method thereof

Abstract

The present invention relates to the field of ceramics and preparation processes thereof, and in particular to a ceramic with concave-convex textures and patterns and a preparation method thereof, wherein the ceramic with concave-convex textures and patterns comprises an inner body and an outer body, wherein the inner body is black, the outer body is yellow, and the outer body surface is distributed with black karst spots, yellow karst spots and gray spots. The unglazed double-layer stoneware formed by combining the inner body and the outer body and firing the inner surface of the body is black, and the main body of the outer body surface is light yellow, and the structures of different colors inside and outside have a strong contrast, and the outer body surface is distributed with black karst spots, yellow karst spots and gray spots of different shades, which resembles the rugged surface of a planet, has rich concave-convex textures and patterns, and is unique in aesthetics.

Description

Technical Field

[0001] The invention relates to the field of ceramics and preparation technology thereof, and in particular to ceramics with concave-convex textures and patterns and a preparation method thereof. Background Art

[0002] Stoneware is called "stone-bodied porcelain" in ancient Chinese books. The body is dense and has been completely sintered, which is very close to porcelain. However, it has not yet vitrified and still has a water absorption rate of less than 2%. The body is opaque, some are white, and most are allowed to show color after firing, so the requirements for raw material purity are not as high as porcelain, and the raw materials are easy to obtain. Stoneware has high strength and good thermal stability, is very suitable for modern mechanized washing, and can smoothly pass the temperature change from refrigerator to oven. Traditional stoneware only has a surface of a single color and effect, and the expression form is relatively simple. If a double-layer body is to be combined, the difficulty lies in the poor bonding between the inner and outer bodies, and cracking and peeling are prone to occur during drying and firing. Summary of the invention

[0003] An object of the present invention is to solve at least the above-mentioned problems by a ceramic having a concavo-convex texture and a pattern and a method for preparing the same.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is as follows: a ceramic with concave-convex textures and patterns, comprising an inner body and an outer body, the inner body is black, the outer body is yellow, and the surface of the outer body is distributed with black cave spots, yellow cave spots and gray spots.

[0005] Preferably, the raw materials of the outer blank include the following components in parts by weight: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz, 10-12 parts of illite, 15-20 parts of borax, 12-14 parts of zirconium dioxide, 2-4 parts of vanadium pentoxide, 5-6 parts of brown combustible particles, and 5-6 parts of black combustible particles.

[0006] Preferably, the raw materials of the black combustible particles include the following components in parts by weight: 30-40 parts of chromium oxide, 15-18 parts of iron oxide, 10-12 parts of nickel oxide, 5-8 parts of copper oxide, 20-30 parts of quartz powder, and 30-40 parts of a binder.

[0007] Preferably, the raw materials of the brown combustible particles include the following components in parts by weight: 15-16 parts of tin dioxide, 10-12 parts of vanadium trioxide, 15-20 parts of quartz powder, and 20-25 parts of a binder.

[0008] Preferably, the raw materials of the binder include the following components in parts by weight: 20-30 parts of ethyl cellulose and 20-30 parts of butyl acetate.

[0009] Preferably, the raw materials of the inner body include the following components in parts by weight: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz stone, 10-12 parts of illite, 15-20 parts of borax, 10-12 parts of nitrocellulose, 10-12 parts of pine alcohol, 5-8 parts of sodium silicate, and 4-5 parts of soda ash.

[0010] According to the above-mentioned method for preparing ceramics with concave-convex texture and pattern, the following steps are included:

[0011] Step a, forming an outer body and drying;

[0012] Step b, injecting the raw materials of the inner body into the outer body and drying;

[0013] Step c: placing the green body in a kiln for firing and forming to obtain ceramics.

[0014] Preferably, in step a, the outer body is formed by slurry injection, and after the remaining slurry is poured out, the body is dried to a moisture content of 10-15%, and then the raw materials of the inner body are injected into the outer body and further dried.

[0015] Preferably, in step c, the ceramic is placed on a shelf, and the surface of the shelf is covered with a molybdenum oxide layer.

[0016] Preferably, in the step c, atomized heavy oil is sprayed into the kiln through a nozzle during the firing process, and when the heavy oil adheres to the green body, dark black oily feces patches are formed on the outer surface of the green body.

[0017] From the above description, it can be seen that the ceramics with concave-convex textures and patterns and the preparation method thereof provided by the present invention have the following beneficial effects: the unglazed double-layer stoneware formed by combining and firing an inner blank and an outer blank, the inner surface of the blank is black, and the main body of the outer blank surface is light yellow, the structures of different colors inside and outside have a strong contrast, and black cave spots, yellow cave spots and gray spots of varying shades are distributed on the surface of the outer blank, which resembles the rugged surface of a planet, has rich concave-convex textures and patterns, and is unique in beauty. DETAILED DESCRIPTION

[0018] The present invention is further described below through specific implementation modes.

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] The ceramic with concave-convex texture and pattern described in the present invention comprises an inner body and an outer body, wherein the inner body is black, the outer body is yellow, and the outer body surface is distributed with black karst spots, yellow karst spots and gray spots. In the present invention, the unglazed double-layer stoneware formed by combining the inner body and the outer body and firing, the inner surface of the body is black, the main body of the outer body surface is light yellow, the different colored structures inside and outside have a strong contrast, and the outer body surface is distributed with black karst spots, yellow karst spots and gray spots of different shades, which resembles the rugged surface of a planet, has rich concave-convex textures and patterns, and is unique in aesthetics. Traditional stoneware only has a surface with a single color and effect, and the expression form is relatively single. If a double-layer body is to be combined, the difficulty is that the bonding between the inner and outer bodies is not good, and cracking and peeling are prone to occur during drying and firing. The present invention solves the above problems through special formulas and processes, the bonding between the inner and outer bodies is good, and the outer surface of the body has an artistic effect of complex concave-convex patterns.

[0021] The raw materials of the outer blank include the following components by weight: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz, 10-12 parts of illite, 15-20 parts of borax, 12-14 parts of zirconium dioxide, 2-4 parts of vanadium pentoxide, 5-6 parts of brown combustible particles, and 5-6 parts of black combustible particles. The outer blank is light yellow after firing, and the brown combustible particles and black combustible particles contained therein contain high-carbon organic matter. After the high-carbon organic matter is fired in a kiln, a part of the organic matter decomposes and volatilizes, causing the blank to sag inward and forming a cave-like shape on the surface of the blank.

[0022] The raw materials of the black combustible particles include the following components by weight: 30-40 parts of chromium oxide, 15-18 parts of iron oxide, 10-12 parts of nickel oxide, 5-8 parts of copper oxide, 20-30 parts of quartz powder, and 30-40 parts of binder. The components of the raw materials except the binder are calcined at 1250 degrees Celsius, quenched and crushed, and then passed through a 250-300 mesh sieve. Then, the binder is added, stirred evenly, dried, and crushed again to pass through an 80-100 mesh sieve to obtain coarse-grained black combustible particles.

[0023] The raw materials of the brown combustible particles include the following components in parts by weight: 15-16 parts of tin dioxide, 10-12 parts of vanadium trioxide, 15-20 parts of quartz powder, and 20-25 parts of a binder; the components of the raw materials except the binder are calcined at a high temperature of 1250 degrees Celsius, rapidly cooled and crushed, and then passed through a 250-300 mesh sieve, and then the binder is added and stirred evenly and then dried, and then crushed again and passed through an 80-100 mesh sieve to obtain coarse-grained brown combustible particles.

[0024] The raw materials of the binder include the following components by weight: 20-30 parts of ethyl cellulose and 20-30 parts of butyl acetate. By adding the binder, the brown combustible particles and black combustible particles obtained contain high-carbon organic matter. After the high-carbon organic matter is fired in a kiln, part of the organic matter decomposes and volatilizes, causing the green body to sag inward, forming a cave-like shape on the surface of the green body, which is called a melt cave. The other part is not completely volatilized and remains in the green body. Because the carbon of the organic matter is deposited in the cave, the green body turns black, and combined with the pigment in the combustible particles, black and yellow cave spots are formed, respectively, which resemble the rugged craters on the surface of the planet.

[0025] The raw materials of the inner body include the following components by weight: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz stone, 10-12 parts of illite, 15-20 parts of borax, 10-12 parts of nitrocellulose, 10-12 parts of terpineol, 5-8 parts of sodium silicate, and 4-5 parts of soda ash. Nitrocellulose and terpineol are added to the inner body to improve the bonding degree of the inner and outer bodies, and the bonding degree of the inner body is improved through the semi-dry and wet grouting process. Sodium silicate and soda ash improve the fluidity and suspension of the slurry, so that the inner body slurry is better attached to the outer body.

[0026] Preferred embodiment one:

[0027] The raw materials of the outer blank include the following components in parts by weight: 40 parts of feldspar, 10 parts of mica powder, 15 parts of quartz stone, 10 parts of illite, 15 parts of borax, 12 parts of zirconium dioxide, 2 parts of vanadium pentoxide, 5 parts of brown combustible particles, and 5 parts of black combustible particles.

[0028] The raw materials of the black combustible particles include the following components in parts by weight: 40 parts of chromium oxide, 18 parts of iron oxide, 10 parts of nickel oxide, 5 parts of copper oxide, 20 parts of quartz powder, and 30 parts of a binder.

[0029] The raw materials of the brown combustible particles include the following components in parts by weight: 15 parts of tin dioxide, 10 parts of vanadium trioxide, 15 parts of quartz powder, and 20 parts of a binder.

[0030] The raw materials of the binder include the following components in parts by weight: 20 parts of ethyl cellulose and 20 parts of butyl acetate.

[0031] The raw materials of the inner body include the following components in parts by weight: 40 parts of feldspar, 10 parts of mica powder, 15 parts of quartz stone, 10 parts of illite, 15 parts of borax, 10 parts of nitrocellulose, 10 parts of pine alcohol, 5 parts of sodium silicate and 4 parts of soda ash.

[0032] Preferred embodiment 2:

[0033] The raw materials of the outer blank include the following components in parts by weight: 50 parts of feldspar, 12 parts of mica powder, 16 parts of quartz stone, 12 parts of illite, 20 parts of borax, 14 parts of zirconium dioxide, 4 parts of vanadium pentoxide, 6 parts of brown combustible particles, and 6 parts of black combustible particles.

[0034] The raw materials of the black combustible particles include the following components in parts by weight: 40 parts of chromium oxide, 18 parts of iron oxide, 12 parts of nickel oxide, 8 parts of copper oxide, 30 parts of quartz powder, and 40 parts of a binder.

[0035] The raw materials of the brown combustible particles include the following components in parts by weight: 16 parts of tin dioxide, 12 parts of vanadium trioxide, 20 parts of quartz powder, and 25 parts of a binder.

[0036] The raw materials of the binder include the following components in parts by weight: 30 parts of ethyl cellulose and 30 parts of butyl acetate.

[0037] The raw materials of the inner body include the following components in parts by weight: 50 parts of feldspar, 12 parts of mica powder, 16 parts of quartz stone, 12 parts of illite, 20 parts of borax, 12 parts of nitrocellulose, 12 parts of pine alcohol, 8 parts of sodium silicate and 5 parts of soda ash.

[0038] Preferred embodiment three:

[0039] The raw materials of the outer blank include the following components in parts by weight: 45 parts of feldspar, 11 parts of mica powder, 15.5 parts of quartz stone, 11 parts of illite, 18 parts of borax, 13 parts of zirconium dioxide, 3 parts of vanadium pentoxide, 5.5 parts of brown combustible particles, and 5.5 parts of black combustible particles.

[0040] The raw materials of the black combustible particles include the following components in parts by weight: 35 parts of chromium oxide, 16 parts of iron oxide, 11 parts of nickel oxide, 7 parts of copper oxide, 25 parts of quartz powder, and 35 parts of a binder.

[0041] The raw materials of the brown combustible particles include the following components in parts by weight: 15.5 parts of tin dioxide, 11 parts of vanadium trioxide, 17 parts of quartz powder, and 22 parts of a binder.

[0042] The raw materials of the binder include the following components in parts by weight: 25 parts of ethyl cellulose and 25 parts of butyl acetate.

[0043] The raw materials of the inner body include the following components in parts by weight: 44 parts of feldspar, 11 parts of mica powder, 15.5 parts of quartz stone, 11 parts of illite, 18 parts of borax, 11 parts of nitrocellulose, 11 parts of pine alcohol, 6 parts of sodium silicate, and 4.5 parts of soda ash.

[0044] The method for preparing the ceramic with concave-convex texture and pattern comprises the following steps:

[0045] Step a, forming an outer body and drying;

[0046] Step b, injecting the raw materials of the inner body into the outer body and drying;

[0047] Step c: placing the green body in a kiln for firing and forming to obtain ceramics.

[0048] In the step a, the outer body is formed by grouting, and after the residual slurry is poured out, the body is dried to a moisture content of 10-15%, and then the raw materials of the inner body are injected into the outer body, and the drying is continued. When the outer body is dried to a semi-dry and wet state, the inner body slurry is injected, and the dry and wet levels of the inner and outer bodies form a ladder, which is not easy to crack or peel off during drying and firing; the fineness of the raw materials of the inner body is greater than that of the outer body, the drying shrinkage and firing shrinkage of the inner body are moderate, slightly greater than the drying shrinkage and firing shrinkage of the outer body, the expansion coefficient of the inner body is smaller than that of the outer body, and the suspension of the inner body slurry is good, so that it can adhere well to the outer body.

[0049] In step c, the ceramic is placed on a shelf, the surface of which is covered with a layer of molybdenum oxide. During the firing process, the molybdenum oxide contained in the shelf volatilizes and adheres to the outer surface of the blank, forming irregular gray spots of varying shades.

[0050] In the step c, during the firing process, atomized heavy oil is sprayed into the kiln through a nozzle. When the heavy oil adheres to the green body, dark black oily spots are formed on the outer surface of the green body. The oily spots are caused by incomplete combustion of the heavy oil and are dark black, further enhancing the mottled feeling of the outer surface of the green body.

[0051] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. Ceramics with concave-convex textures and patterns, characterized in that: The invention comprises an inner body and an outer body, wherein the inner body is black, the outer body is yellow, and the surface of the outer body is distributed with black karst spots, yellow karst spots and gray spots. The raw materials of the outer body, in parts by weight, comprise the following components: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz stone, 10-12 parts of illite, 15-20 parts of borax, 12-14 parts of zirconium dioxide, 2-4 parts of vanadium pentoxide, 5-6 parts of brown combustible particles, and 5-6 parts of black combustible particles. The raw materials of the black combustible particles include the following components in parts by weight: 30-40 parts of chromium oxide, 15-18 parts of iron oxide, 10-12 parts of nickel oxide, 5-8 parts of copper oxide, 20-30 parts of quartz powder, and 30-40 parts of a binder; The raw materials of the brown combustible particles include the following components in parts by weight: 15-16 parts of tin dioxide, 10-12 parts of vanadium trioxide, 15-20 parts of quartz powder, and 20-25 parts of a binder; The raw materials of the binder include the following components in parts by weight: 20-30 parts of ethyl cellulose and 20-30 parts of butyl acetate; The raw materials of the inner body include the following components in parts by weight: 40-50 parts of feldspar, 10-12 parts of mica powder, 15-16 parts of quartz stone, 10-12 parts of illite, 15-20 parts of borax, 10-12 parts of nitrocellulose, 10-12 parts of pine alcohol, 5-8 parts of sodium silicate and 4-5 parts of soda ash.

2. The method for preparing a ceramic having a concave-convex texture and a pattern according to claim 1, characterized in that: The steps include: Step a, forming an outer body and drying; Step b, injecting the raw materials of the inner body into the outer body and drying; Step c: placing the green body in a kiln for firing and forming to obtain ceramics.

3. The method for preparing a ceramic having a concave-convex texture and a pattern according to claim 2, characterized in that: In the step a, the outer body is formed by slurry injection, and after the remaining slurry is poured out, the body is dried to a moisture content of 10-15%.

4. The method for preparing a ceramic having a concave-convex texture and a pattern according to claim 2, characterized in that: In the step c, the ceramic is placed on a shelf, and the surface of the shelf is covered with a molybdenum oxide layer.

5. The method for preparing a ceramic having a concave-convex texture and a pattern according to claim 2, characterized in that: In the step c, atomized heavy oil is sprayed into the kiln through a nozzle during the firing process. When the heavy oil adheres to the green body, dark black oily spots are formed on the outer surface of the green body.