AC behaviour and conductive mechanisms of 2•5 mol% La2O3 doped PbZr0•53Ti0•47O3 ferroelectric ceramics

被引：49

作者：

Barranco, AP ^{[1
]}

Piñar, FC ^{[1
]}

Martínez, OP ^{[1
]}

Guerra, JDS ^{[1
]}

Carmenate, IG ^{[1
]}

机构：

[1] Univ La Habana, Fac Fis, Inst Mat & React Elect, Havana 10400, Cuba

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1999年 / 19卷 / 15期

关键词：

impedance spectroscopy; electrical conductivity; ferroelectric properties; PZT;

D O I：

10.1016/S0955-2219(99)00039-4

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：

Impedance spectroscopy (IS) is an effective characterization method for the investigation of many ceramic systems including the ferroelectric systems. It is employed to analyze the properties of the intragranular and interfacial regions, their interrelations, their temperature and frequency dependences and the DC and AC phenomena in order to separate the individual contributions from the total cell impedance. Using this technique and thermally stimulated current measurements we have studied the ac behavior and the conductive mechanisms in lanthanum-doped lend zirconate titanate, a donor-doped ferroelectric ceramic system, AC and DC conductivity components were found; a Jonscher power-law behavior was obtained and a strong low frequency dispersion was observed in a wide frequency range. A mixture of ionic-electronic conductive behavior was analyzed from the experimental results and the energy, activation values obtained. (C) 1999 Elsevier Science Limited. All rights reserved.

引用

页码：2677 / 2683

页数：7

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