钛-氚反应特性研究 Ⅰ.热力学特性

Investigation on the Characteristics of Titanium-tritium Reaction Ⅰ.Characteristics of Thermodynamics

测定了纯钛在523,773,798和823 K下吸氚、放氚的P-C-T曲线、吸气平衡压与温度的关系曲线;确定了钛吸氚的吸气平衡压和饱和吸气容量,并给出了吸氚热力学参数。钛吸氚在不同的相组成时,标准焓变ΔH值在第一平台(α+β相)为(-101.5±1.9)kJ/mol,在第二平台(β+γ相)为(-179.6±5.6)kJ/mol;而标准熵变ΔS值在第一平台为(-165.3±1.9)J/(K.mol),在第二平台为(-290.3±7.1)J/(K.mol);在吸氚和放氚这一可逆过程中没有发现明显的滞后效应。

The P-C-T curves and the relation between equilibrium pressure and temperature of tritium absorption and desorption for Ti are measured at 523, 773, 798 and 823 K. Equilibrium pressure of the absorption and desorption at different temperature of Ti are given and then the thermodynamic parameters and the tritium absorption capacity are calculated according to Van＇t Hoff equation. There are different changes enthalpy and entropy for titanium in different phases. The enthalpy and entropy changes are （-101. 5±1. 9） kJ/mol and （-165.3±1.9） J/（K · mol） in the first plateau and （-179.6±5.6） kJ/mol and （290.3±7.1） J/（K ·mol） in the second plateau, respectively.