Copper powder, method for producing the same, copper paste using the copper powder, copper paint, electrode

摘要

PPROBLEM TO BE SOLVED: To provide a copper powder used for an electrode in a capacitor or the like, which has improved oxidation resistance. PSOLUTION: This copper powder has the surface of a copper particle modified with 0.1-20 wt.% sulfur compounds such as mercaptopropionate, dodecanthiol, hexanethiol, methyl thioglycolate, ethyl thioglycolate and cysteine. The method for producing such a copper powder comprises, for instance, reacting a copper compound with a reducing agent in a medium to obtain copper particles, and subsequently contacting the obtained copper particles with a sulfur compound to modify the surface of the copper particles with the sulfur compound. PCOPYRIGHT: (C)2005,JPO&NCIPI