Effects of ageing on defect structure in the Bi3NbO7-Bi3YO6 system

被引：15
作者：
Abrahams, I.
Krok, F.
Kozanecka-Szmigiel, A.
Wrobel, W.
Chan, S. C. M.
Dygas, J. R.
机构：
[1] Univ London, Sch Biol & Chem Sci, Ctr Mat Res, London E1 4NS, England
[2] Warsaw Univ Technol, Fac Phys, PL-00662 Warsaw, Poland
来源：
JOURNAL OF POWER SOURCES | 2007年 / 173卷 / 02期
关键词：
bismuth oxide; fluorite; defect structure; neutron diffraction; ageing;
D O I：
10.1016/j.jpowsour.2007.05.045
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ageing effects in the defect fluorite structure of Bi3Nb1-xYxO7-x have been studied using powderneutron diffraction. Two compositions at x=0.4 and x=0.6 were studied after annealing for prolonged times (400-500h) at 410 and 550 degrees C. The results show that significant changes in oxide ion distribution occur at 550 degrees C, but that at 410 degrees C only the lower x-value composition exhibited such a change. A comparison of lattice parameter variation with temperature for annealed and unannealed samples suggests that at higher temperatures the oxide ion distribution is independent of thermal history. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：788 / 794
页数：7
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