Mechanism of vacuum-annealing defects and its effect on release behavior of hydrogen isotopes in Li2TiO3
文献类型：期刊论文
| 作者 | Qi, Q; Wang, J; Xiang, MQ; Zhang, YC; Gu, SX; Luo, GN; Qi, Qiang; Wang, Jing; Xiang, Maoqiao; Zhang, Yingchun |
| 刊名 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
 |
| 出版日期 | 2018 |
| 卷号 | 43期号:27页码:12295 |
| 关键词 | Tritium breeding materials IRRADIATION DEFECTS ESR ANNIHILATION PROCESSES Release behavior of hydrogen isotopes LITHIUM METATITANATE E-centers TRITIUM RELEASE BLANKET TEMPERATURE |
| ISSN号 | 0360-3199 |
| DOI | 10.1016/j.ijhydene.2018.05.050 |
| 文献子类 | Article |
| 英文摘要 | Li2TiO3 is one of the most promising candidates among solid breeder materials. However, defects introduced into Li2TiO3 will act as the strong trapping sites for tritium. In the present study, mechanism of vacuum-annealing defects and its effect on release behavior of hydrogen isotopes in Li2TiO3 were investigated by means of X-ray diffraction, Raman spectroscopy, electron spin resonance and thermal desorption spectroscopy. The color of samples becomes dark blue and the defects were found to be introduced into Li2TiO3 when annealed in vacuum. This color change suggests the change from Ti4+ to Ti3+ due to decrease in oxygen content. The color recovers to white again after annealing in air. X-ray diffraction and Raman spectroscopy results indicate that there are no modifications on Li(2)TiO(3 )crystal phases, but on crystallinity. The main vacuum-annealing defects are E-centers and no other obvious types of defects were observed from electron spin resonance. Based on the experimental results, the production of defects by annealing in vacuum should be satisfied to the following conditions: (1) Li2TiO3 has been exposed in air more than 1 day; (2) Li2TiO3 must be annealed at the temperature higher than 300 degrees C; (3) Li2TiO3 should be annealed in vacuum lower than 10 Pa. E-centers formed under vacuum-annealing processes have considerable effects on release behavior of hydrogen isotopes investigated by thermal desorption spectroscopy and further should be considered in future fusion reactor. The present work gives some suggestions for future fusion reactors: (1) Li2TiO3 should be preserved in vacuum or kept from water vapor; (2) Li2TiO3 should be annealed at high temperature to remove the adsorbed water before loading into the facility, and must be finished within two days to avoid defects coming from reduction; (3) Li2TiO3 should be improved by adding more oxygen or other elements to refrain from defects introduced by reduction reaction. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000438325200036 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/26750]  |
| 专题 | 中国科学院过程工程研究所 |
| 推荐引用方式 GB/T 7714 | Qi, Q,Wang, J,Xiang, MQ,et al. Mechanism of vacuum-annealing defects and its effect on release behavior of hydrogen isotopes in Li2TiO3[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2018,43(27):12295, 12301. |
| APA | Qi, Q.,Wang, J.,Xiang, MQ.,Zhang, YC.,Gu, SX.,...&Luo, Guang-Nan.(2018).Mechanism of vacuum-annealing defects and its effect on release behavior of hydrogen isotopes in Li2TiO3.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,43(27),12295. |
| MLA | Qi, Q,et al."Mechanism of vacuum-annealing defects and its effect on release behavior of hydrogen isotopes in Li2TiO3".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 43.27(2018):12295. |
入库方式： OAI收割
来源：过程工程研究所
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