Deuterium retention and desorption behavior of lithium titanate
Deuterium retention and desorption behavior of lithium titanate
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DOI：
10.1016/j.fusengdes.2008.07.007
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发表时间：
2008-12
影响因子：
1.7
通讯作者：
T. Hino;D. Sato;Y. Yamauchi;H. Tanigawa;M. Akiba;S. Suzuki
中科院分区：
文献类型：
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作者：
T. Hino;D. Sato;Y. Yamauchi;H. Tanigawa;M. Akiba;S. Suzuki
固体增殖材料钛酸锂(Li2TiO_3)用于固体增殖包层，用1.7keV的重离子辐照，研究了氚的滞留量和放氢行为。此外，还得到了重离子注量与重离子滞留量的关系。对Li和Ti也进行了类似的实验，以研究Li_2TiO_3中氘的捕获机理。注入到Li2TiO_3中的氘以HD、D2、HDO和D2O的形式解吸。在这些气体物种中，以HDO形式解吸的重金属量最大。脱附峰出现在600K，但在900K有明显的脱附现象。固体繁殖毯内的温度范围从550K到1200K。这一结果表明，低温区产生的氚在运行过程中没有完全解吸。因此，必须控制包层内温度的空间分布，以便容易地将氚解吸。在Li_2TiO_3中，氘的脱附光谱与Li相似。这表明大多数注入的氢是以Li-D和Li-OD形式被捕获的。
Solid breeding material, lithium titanate (Li2TiO3), employed for a solid breeder blanket, was irradiated by 1.7-keV deuterium ions to investigate an amount of retained deuterium and desorption behavior of deuterium. Dependence of deuterium ion fluence on the amount of retained deuterium was also obtained. Similar experiments were conducted for Li and Ti in order to examine a trapping mechanism of deuterium in Li2TiO3. Deuterium implanted to Li2TiO3desorbed in forms of HD, D2, HDO and D2O. The amount of deuterium desorbed in form of HDO was largest in these gas species. The desorption peak appeared at 600K, but significant desorption up to 900K was observed. The temperature in the solid breeder blanket ranges from 550K to 1200K. The present result suggests that the tritium produced at low temperature region is not completely desorbed during the operation. Thus, a spatial distribution of temperature in the blanket has to be controlled for the tritium to be easily desorbed. The desorption spectra of deuterium in Li2TiO3were similar to those of Li. This suggests that most of implanted deuterium is trapped in form of Li-D and Li-OD.