无机材料学报2000，Vol.15Issue(4)：691-696,6.
Y和YF3掺杂钛酸钡系PTCR材料的结构及性能
Structure and Property of Y and YF3 Doped Barium Titanate
黄传勇 1唐子龙 1张中太1
作者信息
- 1. 清华大学材料科学与工程系，北京 100084
- 折叠
摘要
Abstract
Positive Temperature Coefficient of Resistivity (PTCR) materials based on Yttrium and Yttrium Fluoride (YF3) doped Barium titanate (BaTiO3) ceramics ere prepared in different sintering atmospheres, respectively. The effects of sintering atmospheres on the microstructure, property and mechanism of substitution of doped BaTiO3 ceramics were investigated by the means of XRD, SEM, XRF and R-T measuring instrument. Sintering in a low oxygen partial atmosphere canincrease the densities of Y and YF3 doped BaTiO3 and make grain particle grow. Both Y and YF3 doped BaTiO3 ceramics are n-type semiconductor in which Y substitutes A-site and F substitutes O-site. Sintered in a argon atmosphere, Y doped BaTiO3 exhibited little PTCR effect, however, an anomalous PTCR effect was observed when 0.3mol% YF3doped BaTiO3 ceramics was fired in Argon atmosphere. This phenomenon may be explained by a new O site substitution mechanism关键词
钛酸钡/PTCR效应/气氛烧结/取代机制Key words
barium titanate/PTCR effect/sintering atmosphere/substitution分类
通用工业技术引用本文复制引用
黄传勇,唐子龙,张中太..Y和YF3掺杂钛酸钡系PTCR材料的结构及性能[J].无机材料学报,2000,15(4):691-696,6.
