【Abstract】 This article is mainly about the prep aration of ultrafine copper-silver bimetallic powders with Direct -Red uction at the existence of macromolecule di spersant in this article￡(r)It also dis cussed the factors of controlling granularity which include reaction temperature,concentration of reactant,reaction time,dosage of reducing agent and macromolecule dispersant and so on￡(r)In addition,it studied the properti es of ultrafine copper-silver bimetallic powders including the antioxidatio n￡?antibacterium and conductive pro perties￡(r)It has got satisfying resul ts￡(r)更多还原