Preparation of AgNi nanoparticles in microemulsions
AgNi alloys are the most promising electronic contacted materials due to their optimal combination of the high thermal and electrical conductivity of silver and the high erosion resistance of nickel. However, because of the repulsive interaction of silver and nickel, it is difficult to prepare AgNi alloy with dispersed microstructure by using the traditional methods. Therefore, it is important to find a new method to prepare AgNi alloy. Nanoparticles containing silver and nickel have been prepared by the reduction of AgNO3 and NiSO4 with hydrazine in cyclohexane/n-butanol/SDS/water microemulsions. The chemical composition, morphology, crystal structure, particle size and size distribution of the nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results show that the nanoparticles are perfect crystals with regular sphericity. The mean diameter of AgNi nanoparticles is about 20 nm. In addition, the research shows that the composition of the nanoparticles can be controlled by the primal concentration ratio of silver nitrate and nickel sulfate.
AgNi alloy nanoparticles microemulsion
李月婵 王翠萍 张锦彬 黄艺雄 施展 马云庆 刘兴军
厦门大学材料学院材料科学与工程系,福建厦门,361005
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）