The crystal structure of ionic conductor LaxCe1-xO2-x/2

被引：57

作者：

Bae, JS

Choo, WK

Lee, CH

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon, South Korea

[2] Korea Atom Energy Res Inst, HANARO Ctr, Neutron Beam Applicat Project, Taejon 305600, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 06期

关键词：

crystal structure; ionic conductor; solid solution; x-ray; neutron;

D O I：

10.1016/S0955-2219(03)00499-0

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The crystal structure of La3+ substituted CeO2 solid solution (LaxCe1-xO2-x/2) has been investigated by X-ray and neutron powder diffractions. The fluorite structure of CeO2 is still maintained up to x=0.4 composition although La3+ is the largest trivalent rare earth ion. For xgreater than or equal to0.5 the crystal structure changes to the pyrochloric cation ordering and the remnant La2O3 is unreacted. This structure can, however, be stabilized by Ti4+ addition or thermal treatment. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1291 / 1294

页数：4

共 15 条

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