钛吸氕、氘和氚的热力学同位素效应  

Research on the Thermodynamics Isotope Effects of Titanium Absorbing Hydrogen, Deuterium and Tritium

作　　者：黄刚[1] 曹小华[1] 龙兴贵[1] 杨本福[1] 刘文科[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《同位素》2004年第4期218-221,共4页Journal of Isotopes

基　　金：国家自然科学基金重点项目(50121050)中国工程物理研究院科学技术基金重点项目(2003Z0501)

摘　　要：在金属氢化物热力学及动力学测试系统上测定了钛吸收氕、氘和氚单质气体的压力-组成等温线(p-c-T曲线),并根据范德荷夫方程得到了钛吸收氕、氘和氚形成不同物相时的热力学参数△H0和△S0。实验证明,钛吸收氕、氘和氚单质气体时有显著的热力学同位素效应,在相同温度、相同原子比下,吸气平衡压力从低到高依次是氕、氘和氚,但其反应焓变和熵变从小到大依次是氚、氘和氕。The p-c-T curves of titanium absorbing hydrogen,deuterium and tritium are measured on thermodynamics and kinetics measuring system of metal hydride. According to the Van't Hoff E-quation the thermodynamics parameters of the different phases are determined. The experiments indicate that there are obvious thermodynamics isotope effects when titanium absorbing hydrogen, ' deuterium and tritium. The order of equilibrium pressure absorbing gases is 3H>2H>1H. However, the enthalpy and entropy appears to be in verse order, 3H<2H<1H.

关 键 词：钛 氚 户-c-T曲线 同位素效应 

分 类 号：O642.31[理学—物理化学] TL933[理学—化学]