Mg基贮氢合金放氢反应生成焓的数学模型

Model of desorption enthalpies of formation of Mg-based hydrogen storage alloys

摘要: 在研究了Mg-Ni-M系三元合金生成焓与组成、键参数之间的关系上,建立了生成焓的数学模型,给出了影响生成焓的主要因素及影响程度的大小。结果表明,在Mg-Ni-M系三元合金体系中,元素的电负性差越大,电子浓度越小,合金的生成焓越负,合金氢化物越稳定。

Abstract: A model related the enthalpy was presented on the basis of the enthalpy of formation and com-ponent, bond parameters of Mg-Ni-M system. Main factors that influence on the enthalpy of formationand the extent are given. The results show that larger electro negativity difference and lower electron concentration tend to make the enthalpy of formation lower, and the hydrides more stable for Mg-Ni-M system.