论文部分内容阅读
采用X射线衍射法研究了LaNi5 .1 5 ,La(NiSn) 5 .1 4 ,La(NiSnCo) 5 .1 2 ,La(NiSnMn) 5 .1 2 ,La(NiSnCoMnAl) 5 .1 0 5种AB5 型非化学计量贮氢合金的结构。发现主物相中并未产生第二物相 ,AB5 型贮氢合金中B原子数发生正偏移时 ,晶胞体积减小 ,当B侧含有取代元素时 ,这种变化更加明显。对于非化学计量贮氢合金而言 ,少量Sn取代Ni后 ,晶胞体积大大提高。Mn ,Co和Al的加入也会影响晶胞常数。Sn ,Co ,Mn ,Al均会降低贮氢合金放氢平台压力。
The effects of LaNi 5 .1 5, La (NiSn) 5 .1 4, La (NiSnCo) 5 .1 2, La (NiSnMn) 5 .1 2, La (NiSnCoMnAl) Structure of Non-Stoichiometric Hydrogen Storage Alloys. It was found that the second phase did not occur in the host phase. The volume of the unit cell decreased when the number of B atoms in the AB5-type hydrogen storage alloy was positively shifted. This change was more obvious when the side B contained the replacing element. For non-stoichiometric hydrogen storage alloys, a small amount of Sn replaces Ni, the unit cell volume is greatly increased. The addition of Mn, Co and Al also affects the cell constant. Sn, Co, Mn, Al will reduce the hydrogen storage alloy pressure drop platform.