Mg3La化合物储氢性能及Ni的加入对其性能的影响  

Hydrogen Storage Behavior of Mg3La and the Effect of Ni Addition on It

作　　者：欧阳柳章[1] 童燕青[1] 董汉武[1] 朱敏[1] 

机构地区：[1]华南理工大学机械工程学院,广州510640

出　　处：《武汉理工大学学报》2006年第E02期355-359,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金（50401015）;教育部团队项目（IRT0551）和广东省团队项目.

摘　　要：用X—ray衍射方法（XRD）研究了Mg3La舍金和Mg3LaNi0.1合金吸放氢前后的结构变化。Mg3La合金和Mg3LaNio．1合金在吸／放氢过程中的压力-组成-等温曲线（PCI）和吸氢动力学曲线表明合金能在室温下吸氢，并且具有良好的吸氢动力学特性，能在4min之内达到饱和吸氢量的90％；其最大吸氢量分别为质量分数2．89％和2．73％。Mg3La合金和Mg3LaNi0.1合金的室温吸氢动力学曲线可用Avrami-Erofeev方程拟合。说明吸氢过程符合形核长大机制。同时也计算了Mg3La-H氢化反应的熵和焓。Hydrogen storage properties and microstrueture of Mg3La and Mg3LaNi0.1 alloy was investigated by pressure-composition-isotherms and X-ray diffraction measurement. Mg3 La and Mg3 LaNi0. 1 alloy can absorb hydrogen at room temperature with rapid hydriding/dehydriding kinetics. The experimental curves of hydrogen absorption kinetics at room temperature can be well fitted by Avrami-Erofeev equation. The reversible hydrogen storage capacity of Mg3La and Mg3LaNi0.1 reaches 2.89 % and 2.73 % respectively. The enthalpy and entropy of Mg3La-H dehydriding reaction were also calculated.

关 键 词：储氢材料 镁合金 稀土 

分 类 号：TG139[一般工业技术—材料科学与工程]