富镧混合稀土镍铝系合金贮氢特性的研究

STUDY OF HYDROGEN STORAGE PROPERTIES OF MISCH RARE EARTH-NICKEL-ALUMINA ALLOYS

本文研究了以富镧混合稀土(简称Ml)为吸氢元素组成的MlNi_(5-x)M_x(M为Al等合金元素)合金的贮氢特性。测定了试验合金在不同温度下的等温线和动力学曲线及吸、放氢前后的品格常数的变化,计算出该合金氢化物的热焓和熵变,并就主要贮氢特性与MlNi_5和LaNi_5比较,说明本合金只有一系列的优点,特別是抗中毒和再生性能优良,是一种很有价值的贮氢合金。

This paper deals with the hydrogen storage propertiesof MlNi_(5-x)M_x(M stands for chromium vanadium metallic elements).This alloy contains mishmetal,which is rich in lanthanum(which is denoted by Ml).The isotherm at different temperatures,kinetics and the change of lattice parameters before or afterabsorption and desorption of hydrogen are measured.Heat contentand change of entropy of hydrides in the alloy is calculated.Themain hydrogen storage properties of the alloy are compared withthat of the MlNi_5 and LaNi_5 and therefore,the advantages of thealloy are demonstrated,especially its resistance to poisoning andregenerative property.The alloy is a kind of valuable hydrogenstorage alloy.