云斯宁 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Solid state communications

Key Words:

中文关键字：陶瓷；相变；铁电性能；介电弛豫，英文关键字：ceramics;diffusion phase transition; ferroelectric

Abstract:

The dielectric and ferroelectric properties of Ba1-xSrxTiO3 (BST)(x=0.10, 0.20 0.30, 0.40 and 0.60) ceramics and Ba1-2xSrxCaxTiO3 (BSCT)(x=0.10, 0.20, 0.30) ceramics has been investigated. The low temperature phase transitions of BST ceramics vanish after Ca2+ substituting while the high temperature transition is diffused and relaxed, which becoming more obvious with increasing x. Ca2+ substituting decreases obviously dielectric constant maximum, , of BST ceramics and changed the temperature of dielectric constant maximum, , of BST ceramics. The shift of in BST is attributed mainly to the Sr2+ and Ba2+ concentration. BST ceramics exhibits normal-like ferroelectric characteristics, while a typical relaxor behavior was observed in BSCT ceramics. The relaxor behavior observations may be understood by a random electric field induced domain state.

Note:

云斯宁

Co-author:

XiaoliWang,BoLi,DelongXu

First Author:

yunsining

Indexed by:

Journal paper

Volume:

卷：143

Issue:

期：143

Page Number:

页：461-465

Translation or Not:

no

Date of Publication:

2007-07-01