Preparation method of light ceramic
By introducing high-temperature reduction reactions of raw materials such as alumina and silicon dioxide into the ceramic preparation process, silicon carbide and silicon dioxide are generated, forming a ceramic pore structure. This solves the problem of high ceramic density, realizes the preparation of lightweight ceramics, and enhances product competitiveness and environmental performance.
Patent Information
- Application Number
- CN202411013989.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-12-19
AI Technical Summary
Existing ceramic products have high density, leading to resource waste and environmental pollution. Furthermore, they have low added value in the international market, making it difficult to compete with high-tech ceramics.
Using alumina, silicon oxide, iron oxide, calcium oxide, magnesium oxide, titanium oxide, potassium oxide, sodium oxide, and wood charcoal powder as base powder, silicon carbide and silicon dioxide are generated through a high-temperature reduction reaction, forming a ceramic porous structure and reducing density.
Lightweight ceramics with a density between 1.25 and 1.31 g/cm³ were produced, reducing raw material consumption, energy consumption, and pollutant emissions, thereby enhancing product competitiveness.
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of functional ceramics, in particular to a preparation method of light ceramic. BACKGROUND
[0002] The export volume of ceramic products in China is large, compared with countries such as Italy and Spain, the advantage of China is that the price is low, but the added value of the product is low, and the low added value product is not at a disadvantage in international competition. It can be seen that it is urgent to develop new high-tech ceramic products.
[0003] With the emergence of increasingly serious haze weather and energy shortage, energy saving and emission reduction have attracted the attention of the whole world, and have become an indispensable consideration factor in the development process of enterprises, and the ceramic industry is no exception. The ceramic industry has always been considered as a high-pollution and high-energy-consumption industry. The rapid development in the past decade has led to over-exploitation of many ceramic raw materials such as kaolin, and the problem of exhaustion. The development of green and environmentally friendly building ceramics has become the goal of the entire industry. Light ceramic has two main advantages: 1. saving resources and energy, compared with traditional similar products, light ceramic can save materials, electricity and water, and the comprehensive energy consumption is reduced; 2. reducing the pressure on the environment, light ceramic reduces the emission of pollutants such as sulfur dioxide and waste residue. The lightness of ceramic will be one of the trends in future development. Light ceramic tile has more advantages in transportation and construction compared with traditional ceramic tile. Therefore, the promotion and application of light ceramic technology have positive social significance and economic value. SUMMARY
[0004] The present application aims to overcome the defects in the prior art, and provides a preparation method of light ceramic, which can form a ceramic with large size and light weight, and solves the problem of large density of the previous ceramic.
[0005] In order to achieve the above-mentioned purpose, the present application provides a preparation method of light ceramic, which comprises the following steps: uniformly stirring the base body powder after adding water, pressing and forming, forming a green body for sintering to form light ceramic, wherein the base body powder comprises the following components according to weight: 20-25 parts of aluminum oxide, 50-55 parts of silicon oxide, 0.1-0.2 parts of iron oxide, 0.01-0.1 parts of calcium oxide, 0.1-0.2 parts of magnesium oxide, 0.1-0.2 parts of titanium oxide, 1-2 parts of potassium oxide, 0.01-0.2 parts of sodium oxide, and 10-15 parts of wood carbon powder.
[0006] Most preferably, the base body powder comprises the following raw materials according to weight: 23.22 parts of aluminum oxide, 53.09 parts of silicon oxide, 0.15 parts of iron oxide, 0.08 parts of calcium oxide, 0.13 parts of magnesium oxide, 0.11 parts of titanium oxide, 1.79 parts of potassium oxide, 0.84 parts of sodium oxide, and 13.3 parts of wood carbon powder.
[0007] Preferably, the base blank powder particle size is less than or equal to 200 mesh.
[0008] Preferably, the base blank powder is added with water and stirred to form a slurry, the amount of water is 9-16% of the mass of the base blank powder, then the slurry is pressed to form a mud cake, and then the mud cake is vacuumed and extruded to form a blank body, and finally the blank body is dried and sintered at a firing temperature of 1260-1280 DEG C to form the light ceramic.
[0009] Preferably, the base blank powder is prepared from the following raw materials: kaolin, feldspar, quartz, aluminum, carbon.
[0010] The present application has the following beneficial effects:
[0011] The present application provides a preparation method of light ceramic, which can form a ceramic with large size and light weight, and solves the problem of large density of the ceramic. The density of the existing ordinary ceramic is usually between 2.4-2.9 g / cm3, and the requirement for light ceramic tile in the industry is less than or equal to 1.5 g / cm3. The density of the light ceramic produced by the method of the present application is between 1.25-1.31 g / cm3. The principle is to reduce the input of raw materials, but in the firing process, silicon carbide is obtained by high-temperature reduction reaction of wood carbon powder and silicon oxide, and the silicon carbide is oxidized to form silicon dioxide and oxygen at high temperature, so that the ceramic forms a pore structure after cooling and solidification, thereby increasing the volume of the ceramic and reducing the density of the ceramic. DETAILED DESCRIPTION
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below. Obviously, the following description is only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art without creative labor on the basis of these embodiments.
[0013] The present application provides a preparation method of light ceramic, which comprises the following steps: adding water to the base blank powder and stirring to form a slurry, pressing to form a blank body, and sintering to form a light ceramic. The base blank powder comprises the following components in terms of weight: 20-25 parts of aluminum oxide, 50-55 parts of silicon oxide, 0.1-0.2 parts of iron oxide, 0.01-0.1 parts of calcium oxide, 0.1-0.2 parts of magnesium oxide, 0.1-0.2 parts of titanium oxide, 1-2 parts of potassium oxide, 0.01-0.2 parts of sodium oxide, and 10-15 parts of wood carbon powder.
[0014] Most preferably, the base body powder comprises the following raw materials by weight: 23.22 parts of alumina, 53.09 parts of silica, 0.15 parts of iron oxide, 0.08 parts of calcium oxide, 0.13 parts of magnesium oxide, 0.11 parts of titanium oxide, 1.79 parts of potassium oxide, 0.84 parts of sodium oxide, and 13.3 parts of wood carbon powder.
[0015] The base body powder has a particle size of ≤200 mesh; the base body powder is stirred uniformly after being added with water to form a slurry, the water addition amount is 9-16% of the mass of the base body powder, then the slurry is prepared into a mud cake through pressure filtration, and then the mud cake is formed into a body through vacuum roughing and extrusion, and finally the light ceramic is sintered at a sintering temperature of 1260-1280℃ after the body is dried.
[0016] In the present application, the wood carbon powder and the silicon oxide are reduced to silicon carbide through a high-temperature reduction reaction in the sintering process, the silicon carbide is oxidized to form silicon dioxide and oxygen at high temperature, and the ceramic forms a pore structure after being cooled and solidified, thereby reducing the density of the ceramic.
[0017] Example 1:
[0018] The following base body powder ingredients are obtained from kaolin, feldspar, quartz, aluminum and carbon raw materials: 20 parts of alumina, 55 parts of silica, 0.2 parts of iron oxide, 0.1 parts of calcium oxide, 0.2 parts of magnesium oxide, 0.2 parts of titanium oxide, 1 part of potassium oxide, 0.2 parts of sodium oxide, and 15 parts of wood carbon powder.
[0019] The base body powder is ground to a particle size of ≤200 mesh, stirred uniformly after being added with water, and formed into a body through compression molding. The light ceramic is obtained after the body is sintered after being dried.
[0020] Specific gravity test method: test according to GB / T3810.3 "Ceramic tile test methods Part 3: Determination of water absorption, apparent porosity, apparent relative density and bulk density", the value of the present embodiment is 1.30g / cm 3 .
[0021] Example 2:
[0022] The following base body powder ingredients are obtained from kaolin, feldspar, quartz, aluminum and carbon raw materials: 25 parts of alumina, 50 parts of silica, 0.1 parts of iron oxide, 0.01 parts of calcium oxide, 0.1 parts of magnesium oxide, 0.1 parts of titanium oxide, 2 parts of potassium oxide, 0.01 parts of sodium oxide, and 10 parts of wood carbon powder.
[0023] The base body powder is ground to a particle size of ≤200 mesh, stirred uniformly after being added with water, and formed into a body through compression molding. The light ceramic is obtained after the body is sintered after being dried.
[0024] Specific gravity test method: according to GB / T3810.3 "Ceramic tile test methods Part 3: water absorption, apparent porosity, apparent relative density and bulk density of determination" test, the value of the ceramic of the embodiment is 1.31 g / cm 3 .
[0025] Example 3
[0026] The following base body powder composition is obtained by using kaolin, feldspar, quartz, aluminum, carbon raw materials: 23.22 parts of alumina, 53.09 parts of silicon oxide, 0.15 parts of iron oxide, 0.08 parts of calcium oxide, 0.13 parts of magnesium oxide, 0.11 parts of titanium oxide, 1.79 parts of potassium oxide, 0.84 parts of sodium oxide, and 13.3 parts of wood carbon powder.
[0027] The base body powder is ground to a particle size of ≤200 mesh, stirred uniformly after adding water, and then pressed into a body. After the body is dried, a light ceramic is obtained by firing.
[0028] Specific gravity test method: according to GB / T3810.3 "Ceramic tile test methods Part 3: water absorption, apparent porosity, apparent relative density and bulk density of determination" test, the value of the ceramic of the embodiment is 1.25 g / cm 3 .
[0029] Finally, it should be noted that: obviously, the above examples are only examples for clearly illustrating the present application, and are not limitations of the embodiments. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. A method for preparing lightweight ceramics, characterized in that, Includes the following steps: The basic raw powder is mixed with water and stirred evenly, then pressed into shape to form a green body, which is then sintered to produce lightweight ceramics. The basic raw powder comprises the following components by weight: Alumina 20-25 parts, silicon dioxide 50-55 parts, iron oxide 0.1-0.2 parts, calcium oxide 0.01-0.1 parts, magnesium oxide 0.1-0.2 parts, titanium oxide 0.1-0.2 parts, potassium oxide 1-2 parts, sodium oxide 0.01-0.2 parts, wood charcoal powder 10-15 parts.
2. The method for preparing lightweight ceramics according to claim 1, characterized in that, The basic raw powder comprises the following raw materials by weight: 23.22 parts alumina, 53.09 parts silicon oxide, 0.15 parts iron oxide, 0.08 parts calcium oxide, 0.13 parts magnesium oxide, 0.11 parts titanium oxide, 1.79 parts potassium oxide, 0.84 parts sodium oxide, and 13.3 parts wood charcoal powder.
3. The method for preparing lightweight ceramics according to claim 1, characterized in that, The particle size of the basic raw powder is ≤200 mesh.
4. The method for preparing lightweight ceramics according to claim 1, characterized in that, The specific steps are as follows: water is added to the basic powder and stirred evenly to form a slurry. The amount of water added is 9-16% of the mass of the basic powder. The slurry is then filtered to form a cake, which is then vacuum-refined and extruded to form a green body. Finally, after the green body is dried, it is sintered at a firing temperature of 1260-1280℃ to produce lightweight ceramics.
5. The method for preparing lightweight ceramics according to claim 1, characterized in that, The basic raw material powder is prepared from the following raw materials: kaolin, feldspar, quartz, aluminum, and carbon.