Patent ID: 9744593
Date: 2017-08-29
CPC Classifications: B22F,C22C,Y10T

Claim:
1. A method for producing silver powder wherein a silver solution containing a silver complex and a reductant solution are continuously mixed to provide a reaction liquid, in which the silver complex is reduced to obtain a silver particle slurry, and then, silver powder is produced via steps of filtration, washing, and drying, the method comprising: a step of preparing a silver nucleus solution wherein a silver solution for nucleation containing a silver complex, a solution containing a strong reductant, and a dispersant are mixed to obtain the silver nucleus solution; a step of preparing a reductant solution containing nuclei wherein the silver nucleus solution obtained and a weak reductant having a standard electrode potential higher than that of the strong reductant are mixed to obtain the reductant solution containing nuclei; and a step of growing particles wherein the reductant solution containing nuclei and a silver solution for particle growth containing a silver complex are continuously mixed to provide a reaction solution, in which the silver complex is reduced to thereby grow silver particles.