METHOD OF PREPARING METAL POWDER COATED BY SILVER

摘要

A method of manufacturing metal powder formed with a silver layer is provided to manufacture a metal element having excellent electrical conductivity in simple and cheap processes by coating silver particles of a nano size on the metal base metal powder uniformly. A first solution is manufactured by mixing a nitrate silver aqueous solution with ammonia aqueous solution and dissolving a dispersing agent. A second solution is manufactured by adding/mixing a base metal powder and a reducing agent to the aqueous solution selected from a group having the ammonia aqueous solution, ammonia, and ammonia sulfate to control the acidity by 7 to 10. The first and second solutions are mixed. The Ag in the additional volume of the ammonia is 0.5 to 2.0 mol for 1mol. The Ag in the additional volume of the reducing agent is 0.1 to 0.5 mol for 1 parts by weight.