高分子网络凝胶法制备AB_5型多元贮氢合金  

Preparation of AB_5 type hydrogen storage alloy with polymer-network gel method

作　　者：张静娴[1] 王朋[1] 陈文新[1] 易守军[1] 刘应亮[1] 

机构地区：[1]暨南大学化学系,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2003年第1期42-45,共4页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省重点科技攻关项目(99M02401G和2KM02304G)

摘　　要：　以金属的盐类为原料,先利用高分子网络凝胶法制备出金属氧化物前驱体,再将氧化物前驱体与过量的CaH2混合,利用还原扩散反应在900～1000℃下制得多元贮氢合金La0 4Ce0 1Nd0 2Pr0 3Ni3 55Co0 75Mn0.4Al0.3.对生成的材料进行了XRD和SEM分析.结果表明合金的结构与LaNi5类似,为CaCu5类型.颗粒大小在2～3μm左右,分布均匀,呈球状.AB5 type hydrogen storage alloy was prepared by a soft chemical method. First, the oxide precursors were obtained in a polymer-network gel process with the corresponding metal-salts as starting materials. Then the precursors were reduced by calcium hydride in a reduction-diffusion method at 900～1 000 ℃. A complex hydrogen storage alloy, La0.4Ce0.1Nd0.2Pr0.3Ni3.55Co0.75Mn0.4Al0.3, was formed. X-ray diffraction analysis and scanning electromicroscopy observation showed that the prepared complex alloy was a single LaNi5 phase; the size of the spherical particles of the alloy was distributed in a narrow range of 2～3 μm.

关 键 词：制备 AB5型 多元贮氢合金 高分子网络凝胶法 还原扩散法 贮氢能力 金相结构 

分 类 号：TG139.7[一般工业技术—材料科学与工程]