Manufacture of aluminum nitride powder

Abstract

Abstract PURPOSE:To manufacture high purity AlN powder by mixing a hydrolyzate of an organoaluminum compound with fine C powder in a liq. dispersion medium in a proper ratio, calcining the mixture in an atmosphere of N2, and removing the unreacted C by burning. CONSTITUTION:The hydrolyzable organoaluminum compound such as aluminum alkoxide is brought into contact with water or an org. solvent contg. water such as alcohol, and it is hydrolyzed optionally under heating. During or after the hydrolysis, the resulting hydrolyzate is mixed with fine C powder in a liq. dispersion medium such as alcohol in (1:0.36)-(1:2) weight ratio of Al2O3:C when expressed in terms of Al2O3. The mixtue is calcined at 1,400-1,800 deg.C in an atmosphere of N2 or NH3, and the unreacted C is removed from the resulting fine powder by heating at 600-900 deg.C in an atmosphere contg. O2 to obtain high purity fine AlN powder giving a sintered body having high heat conductivity, high light transmittance and high corrosion resistance.

Inventors

• 👤 Kazuya Takada
• 👤 和哉 高田
• 👤 Toshihiko Nagata
• 👤 俊彦 永田

Bibliographic Details