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US 7,078,010 B2Granted
Method for producing α-alumina powder
AssigneeSumitomo Chemical Company, Limited
InventorsHajime Maki, Yoshiaki Takeuchi, Kazuhisa Kajihara
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Abstract
A method for producing α-alumina powder is described. The method comprises the steps of removing water from a compound containing the following (1), (2), (3) and (4), and calcining the results: (1) α-alumina precursor, (2) seed crystal, (3) water, (4) nitrate ion in an amount of from 2.8 to 3.3 mol per mol of aluminum (Al) contained in the α-alumina precursor and the seed crystal.
Claims10
A method for producing an α-alumina powder comprising the steps of removing water from a compound containing the following (1), (2), (3) and (4), and calcining the results:
- (1) α-alumina precursor,
- (2) seed crystal,
- (3) water,
- (4) nitrate ion in an amount of from 2.8 to 3.3 mol per mol of aluminum (Al) contained in the α-alumina precursor and the seed crystal.
1 more element
Dependencies are inferred from the claim text.