A kind of composite ceramic material and the electric cooker liner prepared thereof

Abstract

The invention discloses a composite ceramic material and an inner container of an electric cooker prepared from the composite ceramic material. The composite ceramic material is prepared from the following components in parts by weight: 3-8 parts of barium carbonate, 20-35 parts of calcite, 5-10 parts of kaolin, 35-55 parts of silica powder, 3-8 parts of potassium nitrate, 10-15 parts of paraffin, 3-8 parts of sodium carbonate, 7-8 parts of boric acid, 11-15 parts of quartz, 50-75 parts of aluminum nitride powder, 2-3 parts of yttrium oxide and 3-5 parts of lanthanum oxide, wherein the aluminum nitride powder is generated by reacting aluminum oxide powder serving as an aluminum source and carbon black powder in the flowing nitrogen atmosphere at the temperature of 1500-1700 DEG C; calcium oxide is added as a catalyst in the reaction process, and decarbonization is carried out in dry air with the temperature of 700-800 DEG C after the reaction is finished; the mass content of cation impurities in the aluminum oxide powder is lower than or equal to 0.02%, and the mass contents of silicon and iron impurities are respectively lower than 0.001%; and the average particle size of the carbon black powder is 35-40nm, and the specific surface area is smaller than or equal to 90m<2> / g.

Description

technical field [0001] The application relates to a composite ceramic material and an electric rice cooker liner prepared by the composite ceramic material, which belongs to the cross-technical field of household cooking appliances and ceramic materials. Background technique [0002] The liner is an important part of household appliances such as rice cookers, but the traditional liner has low thermal efficiency and short service life, which is not suitable for the development of modern electrical appliances. The rice cooker liners currently on the market are usually made of aluminum, iron, stainless steel and other materials, but the surface of the rice cooker liners made of these materials must be surface treated and sprayed. When used for a long time, The sprayed coating on the surface will fall off and fade, which is neither hygienic nor beautiful, and does not meet the requirements of people in today's society for environmental protection and health of products. [0003...

AI Technical Summary

Problems solved by technology

At the same time, the precious metal ions in the crystal of the "Tao Jing" liner can also automatically, permanently and effectively inhibit the bacteria mixed in the food, making the cooked food fresher longer and more hygienic; but the Tao Jing liner also has some disadvantages, For example, the poor anti-oxidation ability seriously affects the service life and safety performance of the ceramic inner pot. In addition, the ceramic inner pot rice cooker on the market has slow heating, low thermal conductivity, and the linear expansion coefficient does not match other parts of the rice cooker inner pot. Uneven, undercooked rice and other problems often occur; therefore, it is very meaningful to study a ceramic liner with high heat transfer efficiency, energy saving and long service life; from this point of view, the present invention provides a Composite ceramic material with high thermal conductivity for inner tank manufacturing and ceramic inner tank prepared from this composite ceramic material

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