吕丽君,程宏辉,李晓林.La(1-x)MgxNi4.25Al0.75(x=0-0.3)合金的结构与储氢性能研究[J].稀有金属材料与工程,2016,45(1):56~61.[Lvlijun,ChengHonghui,Li XiaoLin.The Structure and hydrogen storage properties of La(1-x)MgxNi4.25Al0.75(x=0.0-0.3) Alloys[J].Rare Metal Materials and Engineering,2016,45(1):56~61.]
La(1-x)MgxNi4.25Al0.75(x=0-0.3)合金的结构与储氢性能研究
投稿时间:2014-11-10  修订日期:2015-04-23
中文关键词:  稀土储氢合金  Mg替代  储氢性能
基金项目:中科院战略先导项目;国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      采用三步感应熔炼法制备了La(1-x)MgxNi4.25Al0.75 (x=0.0,0.1,0.2,0.3) 储氢合金,对该系列合金的晶体结构和储氢性能方面进行了研究。晶体结构和相分析结果表明,当x=0.0和0.1时,合金由单一的LaNi4Al相组成;而x=0.2和0.3时,合金由LaNi4Al相, (La,Mg)Ni3相和AlNi3相构成。随着Mg含量x从0.2增至0.3时,合金的第二相丰度和吸/放氢平衡压明显升高,同时储氢容量减小。研究发现,当Mg添加量x=0.1时,合金除具有良好的储氢容量和低平台压外,其吸氢动力学性能更好。
The Structure and hydrogen storage properties of La(1-x)MgxNi4.25Al0.75(x=0.0-0.3) Alloys
英文关键词:RE hydrogen storage alloy  Mg substitution  hydrogen storage properties
英文摘要:
      La(1-x)MgxNi4.25Al0.75 (x=0.0, 0.1, 0.2, 0.3) hydrogen storage alloys were synthesized by means of a three-step induction melting. Their crystal structures and hydrogen storage properties were investigated in the present work. Studies inform that alloys with x=0.0 and 0.1 Mg contain a single LaNi4Al phase, however, those alloys with x=0.2 and 0.3 are composed of LaNi4Al, (La,Mg)Ni3 and AlNi3 phases. With x increasing from 0.2 to 0.3, the abundances of the secondary phases and the plateau pressures in the pressure-composition isotherms are lifted significantly. Meanwhile, their hydrogen storage capacities are remarkably reduced. The alloy with x=0.1 possesses the fastest absorption kinetics compared to the other alloys as well as a good hydrogen capacity and a low plateau pressure.
作者单位E-mail
吕丽君 中国科学院上海应用物理研究所 lvlijun@sinap.ac.cn 
程宏辉 中国科学院上海应用物理研究所扬州大学  
李晓林 中国科学院上海应用物理研究所  
摘要点击次数: 84
全文下载次数: 158
查看全文  查看/发表评论  
关闭