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Ceramic material, ceramic liner and electric cooker prepared from same
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.
Ceramic material, ceramic liner and electric cooker prepared from same
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.
Ceramic material, ceramic liner and electric cooker prepared from same
WU JINNING (author) / YANG GUANGLIANG (author)
2015-11-25
Patent
Electronic Resource
English
| European Patent Office | 2015