Preparation of Ni/C core-shell composite powders by electroless plating method  

作　　者：张海军 刘云 贾全利 贾晓林 

机构地区：[1]Institute of High Temperature Ceramics,Zhengzhou University [2]College of Materials Science and Engineering,Zhengzhou University

出　　处：《中国有色金属学会会刊：英文版》2007年第A02期1144-1147,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project (0512002400) supported by Science Fund for Distinguished Young Scholars of Henan Province, China

摘　　要：Ni/C core-shell composite powders were prepared by electroless nickel-plating. The effects of concentration of NiSO4,bathing temperature,ratio of hydrazine hydrate to NiSO4,pH of the solution,amounts of complexing reagent and surfactant,bath load of activated carbon and reaction time,and so on,on the preparation of Ni/C core-shell composite powders were studied. The results show that the principal factors for Ni/C composite powders preparation are bathing temperature,ratio of hydrazine hydrate to NiSO4 and pH of the solution. The optimum conditions are plating at 90 ℃ with pH10.7 and molar ratio of N2H4·H2O to Ni2+of 3.0. The plated nickel powders are observed to be sphere-like in morphology with size about 100 nm. The maximum dielectric loss of Ni/C core-shell composite powders is about 0.35,and its magnetic loss was low with value about 0 in 2-16 GHz.Ni/C core-shell composite powders were prepared by electroless nickel-plating. The effects of concentration of NiSO4, bathing temperature, ratio of hydrazine hydrate to NiSO4, pH of the solution, amounts of complexing reagent and surfactant, bath load of activated carbon and reaction time, and so on, on the preparation of Ni/C core-shell composite powders were studied. The results show that the principal factors for Ni/C composite powders preparation are bathing temperature, ratio of hydrazine hydrate to NiSO4 and pH of the solution. The optimum conditions are plating at 90 ℃ with pill0.7 and molar ratio of N2H4· H2O to Ni^2＋of 3.0. The plated nickel powders are observed to be sphere-like in morphology with size about 100 nm. The maximum dielectric loss of Ni/C core-shell composite powders is about 0.35, and its magnetic loss was low with value about 0 in 2-16 GHz.

关 键 词：镍/碳复合粉末 制备方法 化学镀 金属表面防护 

分 类 号：TB332[一般工业技术—材料科学与工程]