采用机械合金化制备了La-Mg-Ni系三元储氢材料,并对其热力学、动力学进行了研究,该材料具有很好的活性和较高的储氢量, 在553 K时储氢量达到5.23%(质量百分数).在3.0 MPa氢气压力和423 K~573 K之间的条件下,可以在1 min之内完成饱和吸氢量的90%以上.采用XRD衍射、SEM对材料的物相和形貌进行分析和研究.实验证明:物相组成为La2Mg17,Mg2Ni,LaH2和单质La,颗粒的最大粒径为4 μm.混合粉末材料的非晶化和体系中催化物质的存在使其氢化动力学性能得以明显改善.
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