Preparation and Application of Ultrafine Copper Powder

Ultrafine copper powder has the excellent characteristics of both copper and ultrafine particles and has been widely used in industry. Different fields have different requirements for ultrafine copper powder, so various preparation methods have been derived. In this paper, the characteristics of electrolysis, liquid phase reduction, hydrothermal method and polyol method are analyzed. Some new preparation methods with novel ideas are also enumerated. Also, the applications of ultrafine copper powder are described. In electronic industry, ultrafine copper powder can be used in preparing conductive paste of multilayer ceramic capacitor (MLCC) and conductive ink. In catalysts, copper powder can catalyze the reaction alone, can be loaded on other substances and form alloys with other metals for catalysis. In antibacterial materials, copper nanoparticles can distort the DNA of bacteria and interrupt its biochemical process. Finally, the application trend of ultrafine copper powder is prospected, which is helpful to develop new synthesizing methods and applications of ultrafine copper powder.