Method for producing fine silver-palladium alloy powder

摘要

A method for producing fine silver-palladium alloy powder includes the steps of: (A) preparing separately a silver nitrate solution and a palladium nitrate solution and mixing the solutions, and then adding a neutralizing and complexing agent to the mixed solutions to adjust the pH thereof to about 2.5-3.5, whereby a first mixture containing silver and palladium ions is obtained; (B) preparing a second mixture containing a reductant and a surfactant; (C) bringing the first mixture into contact with the second mixture at a reaction temperature of 15 DEG -50 DEG C. under stirring in order to permit the silver and palladium ions to be reduced and to coprecipitate so as to form silver-palladium alloy particles; and (D) recovering the coprecipitated silver-palladium alloy particles, thereby obtaining the fine silver-palladium alloy powder.