Secondary phases in Nb-doped BaTiO3 ceramics

被引：66

作者：

Brzozowski, E

Castro, MS

Foschini, CR

Stojanovic, B

机构：

[1] Univ Mar del Plata, CONICET, INTEMA, Inst Invest Ciencia & Tecnol Mat, RA-7600 Mar Del Plata, Argentina

[2] Univ Belgrade, Ctr Multidisciplinary Studies, YU-11000 Belgrade, Yugoslavia

[3] UNESP, IQ, BR-14801970 Araraquara, SP, Brazil

来源：

CERAMICS INTERNATIONAL | 2002年 / 28卷 / 07期

关键词：

grain growth; microstructure; BaTiO3 and titanates;

D O I：

10.1016/S0272-8842(02)00042-1

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：

In this work, the effect of Nb2O5 addition on the microstructure of BaTiO3 was studied. From XRD diagrams, a diminution in tetragonality parameters with an increase in dopant concentration was observed. In order to determine morphology and composition of secondary phases in niobium-doped barium titanate, EDAX and SEM analyses were carried out. It was found that a concentration of dopant higher than 0.15 mol% leads to fine-grained BaTiO3 without abnormal grain growth. Otherwise, compositions of secondary phases correspond to the titanium-rich region in the BaO-TiO2 phase diagram. Besides, the titanium content in the precipitate increases with the Nb2O5 addition. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.

引用

页码：773 / 777

页数：5

共 13 条

[1] Influence of foreign ions on the crystal structure of BaTiO3 [J].