Synthesis and dielectric properties of Ba1-xR2x/3Nb2O6 (R: rare earth) with tetragonal tungsten bronze structure

被引：148

作者：

Wakiya, N ^{[1
]}

Wang, JK ^{[1
]}

Saiki, A ^{[1
]}

Shinozaki, K ^{[1
]}

Mizutani, N ^{[1
]}

机构：

[1] Tokyo Inst Technol, Mat Fac Engn, Dept Inorgan Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1999年 / 19卷 / 6-7期

关键词：

tetragonal tungsten bronze; C. ferroelectric properties;

D O I：

10.1016/S0955-2219(98)00376-8

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：

A series of new compounds, Ba1-xR2x/3Nb2O6 (R = Nd, Eu, Gd, Tb, Dy, Ho and Er ) with tetragonal tungsten bronze (TTB) structure were synthesized For Ba-R-Nb-O system, single phase TTB was obtained when X = 0.25. To understand the formation condition of these TTB type compounds, two tolerance factors for TTB, t(A1) and t(A2), were proposed against the coordination polyhedra around Al and A2 site cations, respectively. One of the factors was at least a requisition to stabilize crystal structure for all TTB the compounds. Ba1-xR2x/3Nb2O6 showed ferroelectric characteristics and the Curie temperature, T-c, increased as, the decrease of the ionic radius of rare earth cations. These new compound's have potential to be candidates to apply ferroelectric random access memory (FRAM). (C) 1999 Elsevier Science Limited. All rights reserved.

引用

页码：1071 / 1075

页数：5

共 14 条

[1] FATIGUE-FREE FERROELECTRIC CAPACITORS WITH PLATINUM-ELECTRODES [J].