Release behavior of hydrogen isotopes thermally sorbed in Li2TiO3 single crystal
Release behavior of hydrogen isotopes thermally sorbed in Li2TiO3 single crystal
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DOI：
10.1016/j.jnucmat.2013.02.062
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发表时间：
2013-11
影响因子：
3.1
通讯作者：
Deqiong Zhu;T. Oda;Y. Shono;Satoru Tanaka
中科院分区：
文献类型：
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作者：
Deqiong Zhu;T. Oda;Y. Shono;Satoru Tanaka
了解氚增殖材料中氚释放的基本过程对聚变堆包层设计具有重要意义。采用热脱附谱（TDS）研究了不同尺寸Li2TiO3单晶样品中氢同位素的释放行为。结果表明，随着单晶样品尺寸减小到几μm，氢同位素释放的速率控制步骤从体扩散转移到表面过程。对于羟基基团的量，对于小于几十μ m的晶粒，表面羟基基团变得占主导地位。表面羟基的数量受比表面积和表面条件的影响。
Understanding of fundamental processes governing tritium release in tritium breeder materials is important for blanket design in fusion reactors. In this paper, the release behavior of hydrogen isotopes in Li2TiO3single crystal samples with different sizes was studied by thermal desorption spectroscopy (TDS). It was indicated that with the size of single crystal samples decreasing to several μm, the rate-controlling step in the release of hydrogen isotopes moves from bulk diffusion to surface processes. Regarding the amount of hydroxyl groups, the surface hydroxyl groups became predominant for the grains smaller than several tens of μms. The amount of surface hydroxyl groups was influenced by the specific surface area and surface conditions.