Non-stoichiometory and vaporization characteristic of Li2.1TiO3.05 in hydrogen atmosphere
Non-stoichiometory and vaporization characteristic of Li2.1TiO3.05 in hydrogen atmosphere
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DOI：
10.1016/j.fusengdes.2007.07.005
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
T. Hoshino;M. Yasumoto;K. Tsuchiya;K. Hayashi;H. Nishimura;A. Suzuki;T. Terai
中科院分区：
文献类型：
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作者：
T. Hoshino;M. Yasumoto;K. Tsuchiya;K. Hayashi;H. Nishimura;A. Suzuki;T. Terai
钛酸锂（Li2TiO3）因其化学满足性而成为核聚变反应堆固体增殖材料中最有前途的候选材料之一。提出了在惰性扫气中加入h2来促进增殖材料中氚的释放。然而，li2tio3的质量已经被发现在氢大气中随着时间的推移而减少。为了控制高温使用时的质量变化，需要研制li2tio3，使其具有过量的Li2O。用li2co3和tio2粉体在1273K下固相反应制备了Li2TiO3（L100）和Li2.1TiO3.05（L105）。在热重法中，样品L100和L105在氢气氛中质量随时间减小，在氢气氛变为氧气氛后质量增加。样品L105的氧缺陷比L100少。气氛控制的高温质谱仪提供了L100和L105在2个大气压条件下的蒸气压数据。样品L105在1093K以上总含锂组分的分压高于L100。
Lithium titanate (Li2TiO3) is one of the most promising candidates among the proposed solid breeder materials in fusion reactors because of its chemical satiability. Addition of H2to inert sweep gas has been proposed for enhancing the release of bred tritium from breeder material. However, the mass of Li2TiO3has been found to decrease with time in the hydrogen atmosphere. In order to control the mass change at the time of high-temperature use, development of Li2TiO3which has excess Li2O is needed. Li2TiO3(L100) and Li2.1TiO3.05(L105) were prepared by solid-state reaction at 1273K of Li2CO3and TiO2powders. In thermogravimetry, the masses of samples L100 and L105 were found to decrease with time in a hydrogen atmosphere, then to increase after a change of the atmosphere from hydrogen to oxygen. Sample L105 has fewer oxygen defects than L100. An atmosphere-controlled high-temperature mass spectrometer has provided the vapor pressure data for L100 and L105, under the conditions of D2atmospheres. Sample L105 has a higher partial pressure of total Li-containing species than L100 above 1093K.