Technologies and Performances of Silver-coated Copper Powder Prepared by Displacement Reaction

Silver-coated copper powder was prepared by displacement reaction using EDTA as the complexing agent.The effects of the concentration of reducing agent,dispersant as well as the complexing agent on the performances of silver-coated copper powder were investigated.The results showed that the powder prepared by displacement reaction using EDTA as the complexing agent was in dense and uniform state.When the concentration of complexing agent and reducing agent was all 0.12 mol/L and the ultrasonic dispersion was conducted,the prepared silver-coated copper powder possessed optimal conductivity with dense structure,silvery white color,high clad ratio and best antioxidation.