Fabrication and Characterization of Li2TiO3-Li4SiO4 Pebbles for Tritium Breeder
Fabrication and Characterization of Li2TiO3-Li4SiO4 Pebbles for Tritium Breeder
复制标题
用于氚增殖体的 Li2TiO3-Li4SiO4 卵石的制备和表征
DOI：
10.1007/s10894-015-9967-7
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发表时间：
2015
影响因子：
1.1
通讯作者：
Wang Chaofu
中科院分区：
文献类型：
--
作者：
Xiang Maoqiao;Zhang Yingchun;Zhang Yun;Liu Shuya;Liu Hui;Wang Chaofu
锂基陶瓷被认为是试验包层模块的有前途的陶瓷增殖体。由于锂嬗变，聚变反应堆中陶瓷卵石的锂燃耗将被限制在约15%。首次采用热重分析、差示扫描量热分析和X射线衍射仪对具有一定Li损失量（− xLi 2 TiO 3和− xLi 4SiO 4，x= 0，5，10，20%，摩尔比）的Li 2 TiO 3-Li 4SiO 4陶瓷小球的物相和组成（Li+转移过程）进行了模拟。结果表明，由于Li 4 Ti 5 O 12的八面体（16 c）位是空的，Li+可以迁移到Li 4 Ti 5 O 12中形成Li 2SiO 3和Li 2 TiO 3。为了调整性能以优化，通过石墨床工艺制备20%Li2TiO3 - 80%Li4SiO4小球。在结合这些材料，卵石获得合理的孔隙，小颗粒，和相对较高的压碎负荷。
Lithium based ceramics have been regarded as the promising ceramic breeders of the test blanket modules. As lithium burn-up of ceramic pebbles in the fusion reactor will be limited to about 15 % due to Li transmutation. The phase and composition (Li+transferring process) of Li2TiO3–Li4SiO4ceramic pebbles with a certain amount of Li loss (−xLi2TiO3and −xLi4SiO4,x= 0, 5, 10, 20 %, molar ratio) were simulated by thermogravimetry and differential scanning calorimetry and X-ray diffractometer for the first time. The results showed that the Li+of Li4SiO4could move to Li4Ti5O12to form Li2SiO3and Li2TiO3as the octahedral (16c) sites of Li4Ti5O12are empty. In order to tailor the properties for optimization, 20 % Li2TiO3–80 % Li4SiO4pebbles were fabricated by a graphite bed process. In combining these materials, the pebbles obtained reasonable pores, small grains, and relative high crush load.