Influences of compressive stress and aging on dielectric properties of sodium bismuth titanate ceramics

被引：10

作者：

Sareein, T. ^{[1
]}

Unruan, M. ^{[1
]}

Ngamjarurojana, A. ^{[1
]}

Jiansirisomboon, S. ^{[1
]}

Watcharapasorn, A. ^{[1
]}

Yimnirun, R. ^{[1
]}

机构：

[1] Chiang Mai Univ, Fac Sci, Dept Phys, Chiang Mai 50200, Thailand

来源：

PHYSICS LETTERS A | 2009年 / 373卷 / 17期

关键词：

Dielectric properties; NBT; Compressive stress; Aging; LEAD MAGNESIUM NIOBATE; RELAXOR FERROELECTRIC CERAMICS; PIEZOELECTRIC PROPERTIES; AXIAL PRESSURE; ELECTRIC-FIELD; PHASE-TRANSITION; PRE-STRESS; SOFT PZT; NA0.5BI0.5TIO3; BEHAVIOR;

D O I：

10.1016/j.physleta.2009.02.065

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influences of compressive stress and aging on dielectric properties of undoped and Fe-doped sodium bismuth titanate (NBT) ceramics were investigated. The dielectric properties were decreased significantly with the compressive stress applied parallel to the electric field direction, while the changes were reversed with the stress applied perpendicularly. In addition, lower changes of the dielectric properties with stress were observed in Fe-NBT ceramics, likely caused by an enhanced relaxor characteristic with the acceptor doping, which also reduced the aging rate in the ceramics. Finally, the aging behavior of the NBT and Fe-NBT ceramics followed the slightly stretched exponential law, and the aging rate in both ceramics was found to decrease with frequency, a result of the pinning of the polarization components. These observations clearly confirmed the role of the acceptor dopant in enhancing the relaxor ferroelectric characteristics in the NBT-based ceramics. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1583 / 1587

页数：5

共 55 条

[1] Contrasting aging behavior of as-grown and annealed BaTiO3 single crystals grown by KF-flux technique [J].