A study of tritium behavior in lithium oxide by ion conductivity measurements
A study of tritium behavior in lithium oxide by ion conductivity measurements
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DOI：
10.1016/s0920-3796(89)80126-7
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发表时间：
1989
影响因子：
1.7
通讯作者：
K. Noda;Y. Ishii;H. Matsui;H. Ohno;Hitoshi Watanabe
中科院分区：
文献类型：
--
作者：
K. Noda;Y. Ishii;H. Matsui;H. Ohno;Hitoshi Watanabe
测量了锂氧化物（Li 2 O）经氧离子辐照后的离子电导率，以获得关于辐照对锂离子和氚的行为的影响的信息。电导率在490 K附近随离子注量的增加而减小，在440 K附近随离子注量的增加而增大.在490 K附近的降低和440 K附近的增加被认为分别归因于F+中心和未指定的辐射缺陷。从锂离子在Li 2 O中的扩散机制中导致离子电导率的速率决定因素与氚的速率决定因素相同的观点来看，假设氚的扩散率如下：从490 K到几乎所有F+中心恢复的温度范围内，F+中心降低了氚的扩散率，而未指明的辐射缺陷使其在440 K附近增加。此外，辐照对氚价态的影响（即，T+，T-）的辐射缺陷进行了讨论。
Ion conductivity of lithium oxide (Li2O) irradiated with oxygen ions was measured to obtain information about the effects of irradiation on the behavior of lithium ions and tritium. The conductivity around 490 K decreased with the ion fluence, while around 440 K it increased. The decrease around 490 K and the increase around 440 K were assumed to be attributed to the F+centers and the unspecified radiation defects, respectively. From the point of view that the rate determinant in the mechanism of diffusion of lithium ions in Li2O leading to the ion conductivity is the same as that of tritium, the diffusivity of tritium is assumed to be as follows: the diffusivity of tritium is decreased by the F+centers in the range from 490 K to the temperature at which almost all of F+centers are recovered, while it is increased around 440 K by the unspecified radiation defects. In addition, effects of the irradiation on valence states of tritium (i.e., T+, T−) were discussed in terms of the radiation defects.