云斯宁 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Journal of Materials Research

Key Words:

中文关键字：老化，铁电性能，，英文关键字：age；ferroelectric proiperties

Abstract:

Bismuth-doped (Ba，Ca)TiO3 ceramics (x = 0.10, Bi-BCT) were prepared by a conventional solid-state reaction technique. An abnormal double-like hysteresis polarization–electric (P–E) loop was observed at room temperature for aged Bi-BCT. Raman scattering gives critical evidence for the formation of O vacancies in Bi-BCT. The change from the single P–E loops in the fresh samples to the double loops in the aged samples excludes the existence of a ferroelectric–antiferroelectric transition in Bi-BCT. A reversible domain switching mechanism resulting from a symmetry-conforming shortrange ordering of point defects gives a reasonable explanation for the naturally ageinduced double-like P–E loops in Bi-BCT.

Note:

云斯宁

Co-author:

XiaoliWang,JingShi,DelongXu

First Author:

yunsining

Indexed by:

Journal paper

Volume:

卷：24

Issue:

期：10

Page Number:

页：3073-3077

Translation or Not:

no

Date of Publication:

2009-10-01