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研究了富镧混合稀土贮氢合金ＭｌＮｉ５ 及加Ｓｎ 后对合金的结构、活化性能、吸氢容量和平衡氢压等性能的影响。通过Ｘ 射线衍射分析进行物相分析， 测试了２９８ ，３１３，３３３ Ｋ 温度下合金的吸、放氢ＰＣＴ曲线。结果表明，ＭｌＮｉ５ － ｘＳｎｘ 合金（ｘ＝０ ～０．４） 为六方晶体结构的单相组织。以Ｓｎ 部分取代Ｎｉ 改善了ＭｌＮｉ５ 的活化特性， 并使平台压力降低， 吸、放氢滞后减小。随着Ｓｎ 含量增加， 晶胞体积增大， 平衡氢压降低， 生成热减小， 氢化物稳定性提高。而少量的Ｓｎ 对吸氢能力降低较小， 是理想的替代元素。
The effects of lanthanum-rich mixed rare earth hydrogen storage alloy MlNi5 and addition of Sn on the structure, activation properties, hydrogen absorption capacity and equilibrium hydrogen pressure of the alloy were investigated. The phase analysis was carried out by X-ray diffraction analysis, and the P-CT curves of the as-received and desorbed alloys at 298, 313 and 333 K were tested. The results show that the MlNi5 - xSnx alloy (x = 0 ~ 0.4) is a hexagonal single phase structure. The partial substitution of Sn with Sn improves the activation characteristics of MlNi5 and reduces the pressure on the platform, reducing the hydrogen absorption and hydrogen release hysteresis. With the increase of Sn content, the unit cell volume increases, the equilibrium hydrogen pressure decreases, the heat of generation decreases and the hydride stability improves. However, a small amount of Sn has less hydrogen absorption capacity and is an ideal replacement element.