To provide a method for producing high crystallinity multiple oxide powder of high dispersion which has no intrusion of impurities, and has a uniform grain size at a low cost and with simple equipment.
In the method for producing high crystallinity multiple oxide powder, raw material powder comprising two or more kinds of metal elements and/or semimetal elements composing multiple oxide in individual grains at fixed compositional ratios is injected into a reaction vessel through a nozzle together with a carrier gas, and, in a state where the raw material powder is dispersed into a vapor phase at a concentration of ≤10g/L, heating is performed at a temperature higher than the decomposition temperature or reaction temperature thereof, and also, at a temperature satisfying (Tm/2)°C or higher provided that the melting point of the multiple oxide to be produced is defined as Tm°C to produce the multiple oxide powder.
COPYRIGHT: (C)2004,JPO
Masami Nakamura
Kazuo Nagashima
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