Water vapor concentration dependence and temperature dependence of Li mass loss from Li2TiO3 with excess Li and Li4SiO4
Water vapor concentration dependence and temperature dependence of Li mass loss from Li2TiO3 with excess Li and Li4SiO4
复制标题
过量Li和Li4SiO4的Li2TiO3中Li质量损失的水蒸气浓度依赖性和温度依赖性
DOI：
10.1016/j.fusengdes.2015.03.015
复制
发表时间：
2015
影响因子：
1.7
通讯作者：
S. Fukada
中科院分区：
文献类型：
--
作者：
Motoki Shimozori;K. Katayama;T. Hoshino;Hiroki Ushida;Ryotaro Yamamoto;S. Fukada
在这项研究中，重量减少的Li2TiO3与过量的Li和Li4SiO4在高温下，在氢气气氛或水蒸气气氛下进行了研究。Li2TiO3在900 °C下的Li质量损失在1000 Pa H2气氛下为0.4 wt%，在50 Pa H2O气氛下为1.5 wt%。Li2TiO3的Li质量损失在900 °C下在50至200 Pa的范围内与水蒸气压成比例地增加，并且随着温度从700至900 °C的增加而增加，尽管在600 °C下的Li质量损失显著小于预期。结果发现，在这项工作中使用的Li_2TiO_3和Li_4SiO_4的Li质量损失的水蒸气浓度依赖性和温度依赖性是相当不同的。由于吸附的水的解吸和水形成反应，水蒸气从陶瓷增殖剂材料释放到吹扫气体中。释放的水蒸气可能促进Li的质量损失，在表面上形成LiOH。
In this study, weight reduction of Li2TiO3with excess Li and Li4SiO4at elevated temperatures under hydrogen atmosphere or water vapor atmosphere was investigated. The Li mass loss for the Li2TiO3at 900 °C was 0.4 wt% under 1000 Pa H2atmosphere and 1.5 wt% under 50 Pa H2O atmosphere. The Li mass loss for the Li2TiO3increased proportionally to the water vapor pressure in the range from 50 to 200 Pa at 900 °C and increased with increasing temperature from 700 to 900 °C although Li mass loss at 600 °C was significantly smaller than expected. It was found that water vapor concentration dependence and temperature dependence of Li mass loss for the Li2TiO3and the Li4SiO4used in this work were quite different. Water vapor is released from the ceramic breeder materials into the purge gas due to desorption of adsorbed water and water formation reaction. The released water vapor possibly promotes Li mass loss with the formation of LiOH on the surface.