| 摘要 |
PROBLEM TO BE SOLVED: To produce metallic oxide powder of high purity while effectively removing impurities such as chlorides deposited onto the surface of a metallic raw material. SOLUTION: Metal powder is fed into a reaction vessel in an oxidizing atmosphere together with a carrier gas, and the metallic powder is burned in the reaction vessel to synthesize metallic oxide powder. In this method for producing the metallic oxide powder, a gas for generating water vapor in an amount by which water vapor of >=10 Nm<3> /hr in a theoretical production amount can be produced is fed into the reaction vessel, so that water vapor is excessively produced on the burning of the metallic powder, and deposited impurities onto the metallic powder vaporized on the burning of the metal powder are absorbed into the produced water vapor, and are removed.
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