Study on synthesis of Ag coating Cu bimetallic nano-powders by direct substitution reaction

The Ag coating Cu bimetallic nano-powders were synthesized by substitution reaction with AgNO_3.The synthesis process was discussed and the bimetallic powders were characterized by TEM,EDXS and XRD.The experimental results indicate that the bimetallic powders have a Ag coating Cu nano-powder structure and disperse well,the average grain size is 70 nm and the Ag molar content on the surfaces of the bimetallic powders reaches 74.28%.The oxidation of Cu nano-powders in the lavation process was avoided effective by adding of protective reagent.