Non-stoichiometry and its effect on thermal properties of Li2TiO3

被引：61

作者：

Hoshino, T

Dokiya, M

Terai, T

Takahashi, Y

Yamawaki, M

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Quantum Engn & Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan

[2] Yokohama Natl Univ, Inst Environm Sci & Technol, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[3] Chuo Univ, Dept Appl Chem, Bunkyo Ku, Tokyo 1128551, Japan

来源：

FUSION ENGINEERING AND DESIGN | 2002年 / 61-62卷

关键词：

tritium breeding material; Li2TiO3; non-stoichiometry; thermal diffusivity; heat capacity; thermal conductivity;

D O I：

10.1016/S0920-3796(02)00216-8

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Li2TiO3 is among the most promising candidates for solid breeder materials. However, its structural property, especially the possibility of non-stoichiometric composition, has not been well established yet. Therefore, the composition of Li2TiO3 has been further investigated by means of thermogravimetry, XRD etc. Also, thermal diffusivity measurement was carried out. Mass of Li2TiO3 was found to change after the change of the atmosphere from hydrogen to oxygen as observed by means of thermogravimetry. At the same time, the color was observed to change from dark blue to initial color, white. These behaviors suggest not only oxygen deficient but also lithium oxide deficient defects formation. Thus, the doubly non-stoichiometric composition, Li2-xTiO3-y, has been confirmed. Further, it was shown by thermal diffusivity measurement that 95Li(2)TiO(3) (i.e. Li2O/TiO2 = 0.95) has a higher thermal conductivity than 100Li(2)TiO(3). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：353 / 360

页数：8

共 13 条

[1] NOVEL FINITE PULSE-WIDTH CORRECTION IN FLASH THERMAL-DIFFUSIVITY MEASUREMENT [J].