STRUCTURAL STUDIES OF ORDERING IN THE (PB1-XBAX)(MG1/3NB2/3)O-3 CRYSTALLINE SOLUTION SERIES

被引：67

作者：

VIEHLAND, D ^{[1
]}

KIM, N ^{[1
]}

XU, Z ^{[1
]}

PAYNE, DA ^{[1
]}

机构：

[1] UNIV ILLINOIS,SEITZ MAT RES LAB,URBANA,IL 61801

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1995年 / 78卷 / 09期

关键词：

D O I：

10.1111/j.1151-2916.1995.tb08689.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 ordered structures of the (Pb1-xBax)(Mg1/3Nb2/3O3 crystalline solution series were investigated by selected area electron diffraction (SAED) and high-resolution electron microscopy (HREM). At low Ba contents (e.g., x < 0.40), the ordered structure was found to be isostructural with Pb(Mg1/3Nb2/3)O-3, with a doubled unit cell characterized by 1/2{111} superlattice reflections. At higher Ba contents (e.g., x > 0.60), the ordered structure was characterized by 1/3{111}) superlattice reflections. For intermediate Ba contents (e.g., x = 0.60), diffuse scattering along the {lll} between diffuse 1/2{111} and 1/3{111} reflections was observed. The ordering is attributed to the distribution of the B-site cations between multiple sublattices. Strong fluctuations in the B-site cation ratio between ordered and disordered regions are believed not to exist; however, the possibility of weak fluctuations is consistent with the observed lattice images.

引用

页码：2481 / 2489

页数：9

共 18 条

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