Patent ID: 7374704
Filing Date: 2008-05-20
Classification: B82Y,C01B,C01G,C01P,C04B,H01B,H05K

Abstract:
1. A production method of spherical oxide powder comprising: a feeding step in which a granular powder composed of an oxide composition is fed into a combustion flame together with a carrier gas; a melting step in which said fed granular powder is melted in said combustion flame to obtain a melt; and a solidifying step in which said melt is solidified by being moved and placed outside said combustion flame, to form a spherical oxide powder, wherein said spherical oxide powder obtained through said solidifying step is 1 to 10 μm in mean particle size and 0.9 or above in sphericity, and wherein said melt is solidified in said solidifying step under temperatures corresponding to a plurality of heating means wherein said temperatures gradually decrease along a traveling direction of said melt.