Method for producing an alpha-alumina powder

摘要

The present invention provides a method for producing an alpha-alumina powder. The method for producing an alpha-alumina powder comprises 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, (2) mixing the obtained seed crystal with an aluminum compound, (3) calcining the mixture, and wherein a ratio of H/Ho is 1.06 or more.