COMPOSITE COPPER PARTICLES, AND METHOD FOR PRODUCING SAME
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United States of America Patent
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Issued Date -
May 28, 2015
app pub date -
Jun 19, 2013
filing date -
Jul 6, 2012
priority date (Note) -
Abandoned
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Abstract
The disclosed composite copper particle includes a core particle including copper, and a coating layer including a copper-tin alloy and formed on the surface of the core particle, the composite copper particle having a particle diameter at 50% cumulative volume in the particle size distribution of 0.1 to 10.0 μm. The alloy is preferably CuSn. The ratio of tin to the the composite copper particle is preferably 3.0 to 12.0 mass %. The composite copper particle is suitably obtained by a method including a step of mixing a reducing agent for tin and an aqueous slurry containing a tin source compound and core particles which include copper, to form a coating layer including a copper-tin alloy on a surface of the core particles.
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