摘要
0 引言
锆与钛是属于同一族的金属元素．也是一种吸氢密度很高的功能材料．目前国内外已有较多关于氢在锆中固溶、扩散等方面的报道，但有关锆吸氘和氚性能方面的报道较少。从我们前期的探索实验中发现．锆有着与钛基本相当的贮氢性能．并且在某些性能如固氦能力上还可能优于钛．因此．为了将锆应用于贮存氘和氚．有必要研究锆与氘和氚作用的各种物理化学特性。本工作进行了锆吸、放氘的实验．对其热力学特性进行了研究。
The p-c-T curves and the relation between equilibrium pressure and temperature of deuterium absorption and desorption from zirconium were measured in the temperature range of 400-675 ℃. Equilibrium pressure of the absorption and desorption at different temperatures were given and then the thermodynamic parameters and the deuterium absorption capacity were determined according to Vant Hoff equation. There are different changes of enthalpy and entropy when zirconium changes to different phases. The change of enthalpy in the phase of α plus β·is -98.9 kJ·mol^-1 in the temperature range of 400-475 ℃. The changes of enthalpy in the first and second plateau are -75.1kJ·mol^-1 and -161.7 kJ·mol^-1, respectively in the temperature range of 525 ～675 ℃. The corresponding changes of entropy are -66.5 J·K^-1·mol^-1, -32.4 J·K^-1·mol^-1 and -146.5 J·K^-1·mol^-1, respectively. There are obvious lagging effects when zirconium desorbs deuterium.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第12期2056-2059,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.50971096)资助项目。
关键词
锆
氘
P-C-T曲线
热力学参数
zirconium
deuterium
p-c-T curve
thermodynamic parameters
