Patent ID: 9090469
Filing Date: 2015-07-28
Classification: C01B,C01F,C01P,C04B,Y10T

Abstract:
1. A method of producing a spherical aluminum nitride powder, comprising: (A) mixing 100 parts by mass of an alumina or an alumina hydrate having an average particle diameter of not more than 2 μm, 2 to 10 parts by mass of a compound containing a rare earth metal per 100 parts by mass of said alumina or said alumina hydrate, and 38 to 46 parts by mass of a carbon powder per 100 parts by mass of said alumina or said alumina hydrate to obtain a mixture thereof; and (B) reductively nitriding the alumina or the alumina hydrate in a state where said alumina or said alumina hydrate is dissolved in a liquid phase by holding said mixture in a nitrogen-containing atmosphere at a temperature of 1680 to 1750° C. for 8 to 17 hours.