| Al替代Ni对LaNi5-xAlx性能的影响 |
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| 引用本文： | 曹大力,张瑞静,冷海燕,陈德敏,吕曼祺,杨柯. Al替代Ni对LaNi5-xAlx性能的影响[J]. 稀土, 2004, 25(3): 5-8 |
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| 作者姓名： | 曹大力 张瑞静 冷海燕 陈德敏 吕曼祺 杨柯 |
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| 作者单位： | 1. 中国科学院,金属研究所,辽宁,沈阳,110016;沈阳化工学院,辽宁,沈阳,110142
2. 中国科学院,金属研究所,辽宁,沈阳,110016 |
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| 摘 要： | 通过对LaNi5-xAlx(x=0.25,0.5,0.75,1.0)系合金及其氢化物的晶体结构XRD分析,发现Al的添加并未改变合金的晶体结构类型,只是晶格常数变大。对合金的热力学性能实验研究表明,随着Al含量的增加,贮氢合金的平衡氢压降低,吸氢量减少,滞后现象得到改善,焓变值的绝对值增加。对合金的动力学性能实验研究表明,吸氢速度随x的增加而减慢。
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| 关 键 词： | LaNi5-xAlx系合金 晶体结构 热力学性能 吸氢速度 |
| 文章编号： | 1004-0277(2004)03-0005-04 |
| 修稿时间： | 2003-04-08 |
Effects of Al Substitution for Ni on the Properties of LaNi5-xAlx |
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| CAO Da-li. Effects of Al Substitution for Ni on the Properties of LaNi5-xAlx[J]. Chinese Rare Earths, 2004, 25(3): 5-8 |
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| Authors: | CAO Da-li |
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| Abstract: | A series of hydrogen storage alloys LaNi_(5-x)Al_x(x=0.25, 0.50, 0.75,1.00) are studied. X-ray diffraction analyses of the alloys and their hydrides show that the crystal structures of alloys do not change with the addition of Al, but the lattice constants slightly increase. It can be found by measuring thermodynamic properties of alloys-H_2 system that equilibrium pressure,hydrogen absorptivity and hystersis decrease, but the absolute values of the enthalpy increase with x increasing. Also it can be found that hydrogen absorbing velocity of the alloys decrease with x increasing. |
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| Keywords: | LaNiAl alloy crystal structure thermodynamic property hydrogen absorbing velocity |
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