Ceramic material, ceramic liner and electric cooker prepared from same

Abstract

The invention discloses a ceramic material, a ceramic liner and an electric cooker prepared from the same. The ceramic material is prepared from 3-8 parts of barium carbonate, 20-35 parts of calcite, 5-10 parts of kaolin, 35-55 parts of silicon micropowder, 3-8 parts of potassium nitrate, 10-15 parts of paraffin, 3-8 parts of soda ash, 7-8 parts of boric acid, 11-15 parts of quartz, 50-75 parts of aluminum nitride powder, 2-3 parts of samarium oxide and 3-5 parts of erbium oxide. The aluminum nitride powder is prepared by reacting an aluminum source aluminum oxide powder with carbon black powder in a flowing nitrogen atmosphere at 1500-1700 DEG C. In the reaction process, calcium fluoride or yttrium oxide is added as a catalyst; and after the reaction finishes, decarbonization treatment is performed in 700-800-DEG C dry air. The mass percent of the cation impurities in the aluminum oxide powder is less than or equal to 0.02%, and the mass percents of the silicon and iron impurities are respectively less than 0.001%. The average particle size of the carbon black powder is 35-40nm, and the specific area is less than or equal to 90 m<3> / g.

Description

technical field [0001] The present application relates to a ceramic material, a ceramic liner and an electric rice cooker prepared therefrom, and belongs to the interdisciplinary 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. At present, the ceramic liners produced and sold on the market are usually made of aluminum, iron, stainless steel and other materials, but the surface of the ceramic 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. ...

AI Technical Summary

Problems solved by technology

However, there are also some disadvantages in the ceramic inner tank, such as poor oxidation resistance, which seriously affects the service life and safety performance of the ceramic inner tank. In addition, the ceramic inner tank on the market has slow heating, low thermal conductivity, and linear expansion coefficient. The other parts of the ceramic liner do not match, resulting in uneven heat transfer, often causing problems such as undercooked rice