储氢合金Mg_2Ni的制备及其储氢性能分析  

Research on Preparation and Hydrogen Storage Properties of Mg_2Ni Hydrogen Storage Alloys

作　　者：陈玉安[1] 苗鹤[1] 徐幸梓[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2005年第12期39-41,共3页Journal of Chongqing University

基　　金：重庆市应用基础研究资助项目(7941);重庆大学基础及应用基础研究资助项目(713411003)

摘　　要：Mg-N i基储氢合金以其比容量高、成本低而倍受关注.采用感应熔炼法,在不高于900℃的温度下成功制备出Mg2N i合金,X射线衍射及金相组织分析表明,合金中主相为Mg2N i.对制备出的Mg2N i合金进行气态吸放氢性能测试,结果表明,经粉碎后的合金粉体经第1次活化,吸氢量为3.15 wt%,2次活化后吸氢量达到3.49 wt%,接近其理论值,而合金块体在第2次活化后的吸氢量远小于合金粉体的吸氢量,且第3次活化后未见明显增大.Considerable attention has been paid to Mg-Ni based hydrogen storage alloys because of their high capacity and low cost. The Mg2Ni alloys have been successfully synthesized under 900℃ by means of a metallurgical method in an induction furnace. The studies of X-ray diffraction and metallorgraphic structure reveal that there are pricipally Mg2Ni phases in the alloys. The measurements of the hydrogen storage properties for the alloys have been carried out. The resuits show that the hydrogen storage capacities of 3.14 wt% and 3.49 wt% of the alloy powders are observed after the first and the second activation respectivelly. The latter is closed to the maximum of hydrogen storage capacity of Mg2Ni. The hydrogen there is not ob storage capacity of the bulk samples viously increase in hydrogen storage is much less than the alloy powders after the second activation and capacity of the samples after the third activation.

关 键 词：镁基储氢合金 镁镍合金 吸放氢性能 活化性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]