【摘要】 利用金属氢化物热力学和动力学参数测试实验系统,通过反应速率分析方法,测定了铪在恒容系统和573～873K温度范围内氘化反应的压强-时间变化关系,计算出铪在初始压强13 kPa和573、673、773、873 K温度下吸氘反应的速率常数分别为0.0530、0.0452、0.0319和0.0261s^-1,进而得到铪吸氘反应表观活化能为（-10.1±1.5）kJ·mol^-1。与同一装置上取得的钛氘化反应结果进行比较,说明两个反应的动力学机制不同,铪氘化反应速率主要受相变和表面过程控制。更多还原

【Abstract】 With the method of the reaction rate analysis in a constant volume reactor,the time dependence of the pressure drop of the hafnium deuteride formation are studied over a temperature range 573～873K on a metal hydride thermodynamic and kinetic parameters measuring apparatus.The rate constants of the hafnium deuteride formation are 0.0530,0. 0452,0.0319 and 0.0261s^-1 at 573,673,773 and 873K repectively with the initial pressure of 13kPa,and then the activation energy of the reaction is acquired to be（-10.1±1.5） kJ·mol^-1.Kinetic mechanism of the deuteride formation of hafnium and titanium is considerd to be different after comparing the above results with those of titanium deuteride formation on the same measuring apparatus,where the reaction rate of hafnium absorbing deuterium may be controlled by phase transformation and surface oxidation.更多还原