The structural origin of the antiferroelectric properties and relaxor behavior of Na0.5Bi0.5TiO3

被引：80

作者：

Dorcet, V. ^{[1
]}

Trolliard, G. ^{[2
]}

Boullay, P. ^{[1
]}

机构：

[1] CNRS, CRISMAT, UMR 6508, Lab Cristallog & Sci Mat, F-14050 Caen, France

[2] CNRS, SPCTS, UMR 6638, Lab Sci Procedes Ceram & Traitements Surface, F-87060 Limoges, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 11期

关键词：

TEM; NBT; Phase transition; Ferroelectric; Relaxor; SODIUM-BISMUTH TITANATE; PHASE-TRANSITIONS; SINGLE-CRYSTAL; NA1/2BI1/2TIO3; PEROVSKITES;

D O I：

10.1016/j.jmmm.2009.02.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work presents a study of Na0.5Bi0.5TiO3 (NBT) by transmission electron microscopy in the 20-370 degrees C temperature range. A new orthorhombic intermediate phase between the rhombohedral and the tetragonal phases is proposed to account for the occurrence of 1/2(oee) superstructure spots. The phase transition from the rhombohedral to the orthorhombic phase occurs via a modulated phase formed by rhombohedral blocks and orthorhombic sheets. It is shown that these latter represent rhombohedral (010) twin planes. The modulated phase is proposed to explain the antiferroelectric and relaxor behaviors of NBT. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1758 / 1761

页数：4

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