| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing copper-silver composite powder for electrically conductive paste exhibiting electrical conductivity close to that of silver. SOLUTION: Copper powder is mixed with, by weight, 3 to 50% silver oxide, the copper powder is mechanically bonded to the silver oxide while pulverizing is executed, and, thereafter, reducing treatment is executed at 120 to 400 deg.C to obtain powder of <=100μm particle size and >=2000 cm<2> /g specific surface area value in a BET method. In the process of the pulverizing, <=1% fatty acid is added, or before the reducing treatment, 0.1 to 2% fatty acid is added to mix, and the reducing treatment is executed at 150 to 500 deg.C.
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