ORDERING BEHAVIOR OF LEAD MAGNESIUM NIOBATE CERAMICS WITH A-SITE SUBSTITUTION

被引：83

作者：

LIN, LJ

WU, TB

机构：

[1] Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 05期

关键词：

crystallography; lead; magnesium; niobates; substitution;

D O I：

10.1111/j.1151-2916.1990.tb05188.x

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 ordering behavior of lanthanum‐modified lead magnesium niobate ceramics was investigated over a wide range of lanthanum content (from 0 to 50 at.%). The ordering of magnesium and niobium ions in the B site was examined by X‐ray diffraction, and the superlattice reflection was associated with the A(B′1/2B″1/2)O3‐type partial ordering structure. Moreover, the ordering degree increased pronouncedly with respect to lanthanum content of the sample and almost reached unity at [La] = 50 at.%. Finally, a comparison of the ordering behavior was performed among several lead magnesium niobate (PMN) samples with different A‐site substitutional ions. The mechanism used to enhance the ordering of PMN by A‐site substitution is then described by the effect of high valence. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：1253 / 1256

页数：4

共 11 条

[1] NEW COMPOUNDS WITH PEROVSKITE-LIKE STRUCTURES [J].