| 摘要 |
PROBLEM TO BE SOLVED: To provide nickel powder in which dispersibility is sufficiently secured as that of the material for electronic parts, and the contents of impurities are low, and to provide a simple production method therefor. SOLUTION: The production method includes: a step (A) where a nickel salt aqueous solution is neutralized with an alkali aqueous solution, so as to produce the precipitates of nickel hydroxide; a step (B) where the nickel hydroxide is heat-treated in the air, so as to produce nickel oxide; a step (C) where the surface of the nickel oxide powder is coated or stuck with a water-soluble alkali metal halide; a step (D) where the nickel oxide whose surface is coated or stuck with the water soluble alkali metal halide is reduced in a reducing gas atmosphere, so as to be nickel powder; and a step (E) where the alkali metal halide is cleaned away. In the nickel powder obtained by the method, a grain size distribution D90 is≤1.0μm, a specific surface area is≤4.6 m<SP>2</SP>/g, and the contents of chlorine, sodium and potassium are≤100 mass ppm. COPYRIGHT: (C)2010,JPO&INPIT
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