The PTCR effect in BaTiO3 ceramics modified by donor dopant

被引：52

作者：

Qi, JQ ^{[1
]}

Gui, ZL ^{[1
]}

Wang, YL ^{[1
]}

Zhu, Q ^{[1
]}

Wu, YJ ^{[1
]}

Li, LT ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2002年 / 28卷 / 02期

关键词：

BaTiO3; PTCR effect; Ce3+; Sm3+; Yb3+; dopants;

D O I：

10.1016/S0272-8842(01)00069-4

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 PTCR effect of BaTiO3-based ceramics is influenced severely by either impurities or the process. The influence of Ce3+, Sm3+ and Yb3+ on the PTCR effect was studied. In order to exclude other influential factors, the ceramics was only modified by donor dopant using high purity raw materials. It was found that, in each group of these donor doped samples, the RT resistance decreased with donor content in low doping level, after it reaches a minimum, and increases rapidly at high doping level; the PTCR effect decreased with donor content irrespective of the doping level. (C) 2002 Elsevier Science Ltd and Techna S.r.l. All rights reserved.

引用

页码：141 / 143

页数：3