Preparation of Li4SiO4-xLi2O powders and pebbles for advanced tritium breeders |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, PR China;2. Department of Physics, Renmin University of China, Beijing, 100872, PR China;1. College of Physical Science and Technology, Sichuan University, Chengdu, 610064, China;2. Key Laboratory of Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu, 610064, China;3. College of Materials Science and Engineering, Sichuan University, Chengdus, Sichuan 610065, China;1. Breeding Functional Materials Development Group, Department of Blanket Systems Research, Rokkasho Fusion Institute, Sector of Fusion Research and Development, Japan Atomic Energy Agency, 2-166 Obuch, Omotedate, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan;2. Tritium Technology Group, Department of Blanket Systems Research, Rokkasho Fusion Institute, Sector of Fusion Research and Development, Japan Atomic Energy Agency, 2-4 Shirakata, Shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan;3. Blanket Technology Group, Department of Blanket Systems Research, Rokkasho Fusion Institute, Sector of Fusion Research and Development, Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan;4. BA Project Coordination Group, Department of Fusion Power Systems Research, Rokkasho Fusion Institute, Sector of Fusion Research and Development, Japan Atomic Energy Agency, 2-166 Obuch, Omotedate, Rokkasho-mura, Kamikita-gun, Aomori 039-3212, Japan |
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| Abstract: | Li4SiO4 pebbles and Li2O pebbles have been considered as the potential candidates for tritium breeders. Li2O exhibits higher lithium density whereas worse lithium loss and hygroscopicity compared with Li4SiO4. It is anticipated to obtain an advanced breeder by combining Li4SiO4 with Li2O. The coexistence of Li4SiO4 and Li2O powders could not be obtained by solid state reaction using Li2CO3 as lithium source, while the biphasic Li4SiO4-xLi2O (x=0.1, 0.2, 0.3, 0.4) powders were prepared by sol-gel method in this experiment. Meanwhile, the biphasic Li4SiO4-xLi2O pebbles were fabricated by a wet method for the first time. The Li2O aggregated at the grain boundaries and promoted the grain growth of the Li4SiO4. The grain size and the crush load of the Li4SiO4-0.3Li2O pebbles reached 32.3 µm and 46.5 N, respectively. |
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| Keywords: | Advanced tritium breeders Wet method |
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