储氢材料新合成方法的研究(Ⅱ)——置换—扩散法合成Mg_(2)Ni  

Chemical Synthesis of Hydrogen-Storing Alloys(Ⅱ)——Replacement-Diffusion Method for Mg_(2)Ni

作　　者：申泮文[1] 张允什[1] 袁华堂[1] 陈声昌[1] 周家祥 Shen Panwea;Zhang Yunshi;Yuan Huatang;Chen Shengchang;Zhou Jiaxiang(Department of Chemistry,Nankai University,Tianjin)

机构地区：[1]南开大学化学系

出　　处：《高等学校化学学报》1985年第3期197-200,共4页Chemical Journal of Chinese Universities

基　　金：中国科学院科学基金资助课题。

摘　　要：本文用置换-扩散法合成了储氢材料Mg_(2)Ni.它是在二甲基甲酰胺中,用金属镁锉屑去置换溶液中化合态的镍(NiCl_(2)),使镍接镀在镁上.然后在温度500—580℃、氩气氛下扩散2-3小时.所得的Mg_(2)Ni有较好的物理和化学性能,特别是氢化物分解温度有明显的降低.In this paper a chemical method for the synthesis of hydrogen-storing alloy Mg_(2)Ni is presented, and powdered magnesium was used in excess to displace nickel in DMF so that Ni was deposited on Mg by stoichiometric amount. The Ni-coate Mg powder was heated at 550-580℃ for homogeneity of the alloy. The alloy thus prepared has excellent surface properties compared with that of the alloy prepared metallurigically, i.e, it has larger specific surface area, ease of activation, higher rates and lower temperatures for hydrogen absorption and desorption.

关 键 词：储氢材料 扩散法 二甲基甲酰胺 化合态 新合成方法 金属镁 分解温度 

分 类 号：G63[文化科学—教育学]