| 锆吸氘和氚的动力学同位素效应 |
| Kinetic Isotope Effects of Deuterium and Tritium Absorption by Zirconium |
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| 摘要: 应用反应速率分析方法，在高真空金属系统上测定了锆在恒容体系和450～630 ℃范围内吸收氘和氚的p-t曲线。由p-t曲线可知，在同一温度下，锆吸氚的速率低于锆吸氘的速率；而随着温度的升高，由于解吸逆反应的影响，锆吸氚(氘)的反应速率降低。根据p-t曲线计算了吸气反应在不同温度的速率常数，得到锆吸氘和氚的表观活化能分别为(-25.9±0.7)和(-16.8±0.8)kJ·mol-1。从活化能数据可以看出 |
| 关键词: 锆 氚 表观活化能 同位素效应 |
| 基金项目: |
| Abstract: The p-t curves of deuterium and tritium absorption by zirconium were investigated at the 450～630 ℃ by using the method of the reaction rate analysis in a constant volume system. The rate of tritium absorption is lower than the rate of deuterium absorption on the same temperature and the rate of tritium (deuterium) absorption is decreased when the tritium(deuterium) absorption temperature is increased due to the effect of contrary reaction namely desorption of zirconium tritide. The rate constants of deuterium and tritium absorption on different temperatures are determined and the activation energy value obtained by this analysis is (-25.9±0.7) kJ·mol-1 and (-16.8±0.8) kJ·mol-1 respectively and so there are remarkable kinetic isotope effects when deuterium and tritium absorption by zirconium. |
| Keywords: zirconium tritium activation energy value isotope effect |
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| 黄 刚,龙兴贵,梁建华,杨本福.锆吸氘和氚的动力学同位素效应[J].无机化学学报,2009,25(8):1354-1358. |
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