机械化学法制备Mg-Ni-Ti_(0.32)Cr_(0.35)V_(0.07)Fe_(0.26)复合材料的储放氢性能  

Hydrogen Sorption-Desorption Properties of Mg-Ni-Ti_(0.32)Cr_(0.35)V_(0.07)Fe_(0.26) Composite by Mechanochemical Syntyhsis

作　　者：李谦[1] 吴铸[2] 鲁雄刚[1] 周国治[1] 徐匡迪[1] 

机构地区：[1]上海大学,上海200072 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《稀有金属材料与工程》2007年第9期1672-1676,共5页Rare Metal Materials and Engineering

基　　金：上海市科委纳米科技专项(0452NM002);上海市基础研究重点项目(05JC14064);上海市青年科技启明星计划(06QA14021)

摘　　要：以Ti0.32Cr0.35V0.07Fe0.26和Ni作为添加物,采用机械化学法制备了镁基复合材料。利用体积法,XRD,SEM,TEM,XPS,GC等测试手段研究了材料的吸放氢性能及其物相组成、结构、合金表相和体相性质。阐释了球磨时间、合金成分和组织结构对氢化性能的影响,探讨了复合材料的储放氢机理。研究表明:包覆在镁颗粒表面的微小的Ti0.32Cr0.35V0.07Fe0.26和Ni起到协同催化作用,球磨产生的大量纳米晶粒,都有利于降低材料吸放氢温度,加快吸放氢速度。The Mg-based hydrogen storage composites have been successfully prepared by mechanochemical synthesis using Ti0.32Cr0.35V0.07Fe0.26 and Ni as additives. The hydrogen sorption-desorption characteristics were mensurated by an isovolumetric method, and the structures and constitutes, and the surface and body properties were investigated by XRD, SEM, TEM, GC and XPS, respectively. The correlations of the milling time and alloy components with the structure and hydrogen sorption-desorption property were elucidated, then the hydrogen sorption-desorption mechanism was discussed. The results indicate that the hydrogen sorption-desorption temperature decreased and the kinetic properties are improved because the fine Ti0.32Cr0.35V0.07Fe0.26 and Ni particles covering magnesium matrix act as the catalytic phases to produce a significant amount of nanoparticles in favor of the decrease of temperatures and the increase of speed for hydrogen sorption-desorption.

关 键 词：镁基储氢合金 Ti0.32Cr0.35V0.07Fe0.26 机械化学法 储放氢性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]