| 摘要 |
Provided is a powder for conductive fillers, which is composed of a plurality of particles, and wherein: the material for each particle is an alloy that contains from 0.1% by mass to 10% by mass (inclusive) of Bi, with the balance made up of Cu and unavoidable impurities; the alloy contains a first CuBi phase satisfying mathematical formula (1) and a second CuBi phase satisfying mathematical formula (2); each of the particles has a surface layer having a thickness of 100 nm; and the ratio P1 of the first CuBi phase in the surface layer is 5% by mass or more. This powder for conductive fillers has excellent conductivity, and is able to be obtained at low cost. 0.010 ≤ x/y ≤ 1 (1) 0 < x/y ≤ 0.005 (2) (In mathematical formulae (1) and (2), x represents the mass content of Bi and y represents the mass content of Cu.) |
