Process for preparing spherical copper fine powder

摘要

In a process for preparing a spherical copper fine powder having an average grain size ranging from 0.1 mu m to a few mu m, by use of chemical vapor deposition of cuprous chloride vapor with a reducing gas, the vapor deposition zone is maintained at a temperature ranging 900 DEG C. to less than 1,150 DEG C. and the generated particles are quenched subsequently. The generated powder is utilized as a conductive powder which is the main component of a conductive paste.