| 摘要 |
Provided is spherical copper fine powder in which the average grain size of copper fine powder is 0.05 μm or more and 0.25 μm or less. Additionally provided is a method of producing spherical copper fine powder including the steps of preparing a slurry by adding cuprous oxide to an aqueous medium containing an additive of natural resin, polysaccharide or a derivative thereof, adding 5 to 50% of an acid aqueous solution to the slurry at a time within 15 minutes, and thereby performing disproportionation. The process enables speedy, efficient and stable production of metallic copper particles controlled in particle shape or particle size, particularly copper fine powder having small particles in size.
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