Patent ID: 7691362
Filing Date: 2010-04-06
Classification: B82Y,C01F,C01P

Abstract:
1. A method for producing an α-alumina powder comprising the steps of: (1) pulverizing a metal compound having a full width at half maximum (Ho) of a main peak in XRD pattern to obtain a seed crystal having a full width at half maximum (H) of the main peak in XRD pattern in the presence of pulverizing agent, (2) mixing the obtained seed crystal with an aluminum salt, (3) calcining the mixture, and wherein the ratio of H/Ho is 1.06 or more, wherein the pulverizing agent is at least one selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, 1,3-butylene glycol and 1,4-butylene glycol.