BiFeO3-PbTiO3 系高温压电陶瓷的阻抗谱分析

doi:10.3969/j.issn.1007-2861.2011.04.021

上海大学学报(自然科学版) ›› 2011, Vol. 17 ›› Issue (4): 535-540.doi: 10.3969/j.issn.1007-2861.2011.04.021

BiFeO₃-PbTiO₃ 系高温压电陶瓷的阻抗谱分析

程晋荣，石贵阳，祁玉发，陈建国，俞圣雯

（上海大学材料科学与工程学院，上海 200072）

出版日期:2011-08-30 发布日期:2011-08-30
通讯作者: 程晋荣（1969～），女，研究员，博士生导师，研究方向为铁电、压电材料等. E-mail:jrcheng@shu.edu.cn
基金资助:
国家自然科学基金资助项目（50472098，50711130241）;上海市教委基金资助项目(08SG41);上海市纳米专项基金资助项目（1052NM07300）

Impedance Spectroscopy Study of High Temperature BiFeO₃-PbTiO₃ Based Ceramics

CHENG Jin-rong,SHI Gui-yang,QI Yu-fa,CHEN Jian-guo,YU Sheng-wen

(School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China)

Online:2011-08-30 Published:2011-08-30

摘要/Abstract

摘要： 采用交流阻抗谱分析0.63(Bi_0.94La_0.06)(Ga_0.05Fe_0.95)O₃-0.37PbTiO₃(BLGF-PT)高温压电陶瓷的导电机制.阻抗谱和模谱分析表明，BLGF-PT的绝缘性能主要由晶粒贡献，BLGFPT 陶瓷的电学等效电路可以用一个电阻和一个通用电容器并联构成.由阻抗谱计算得出的晶粒电阻率随温度的升高而下降，载流子的激活能为0.88 eV.

关键词: 导电机制, 等效电路, 高温压电陶瓷, 阻抗谱

Abstract: Impedance spectroscopy has been used to investigate the conduction mechanism in the high temperature ceramics 0.63(Bi_0.94La_0.06)(Ga_0.05Fe_0.95)O₃-0.37PbTiO₃(BLGF-PT). The analysis of impedance and modulus spectroscopy has revealed that the region of grains is the most resistive component in the sample. Also, the electrical properties of BLGFPT ceramics are demonstrated, which can be represented using a parallel combination of a resistor and a universal capacitor. Resistivity of grains extracted from complex impedance plots decrease with the increase of temperature, and the calculated activation energy Ea is 0.88 eV.

Key words: conduction mechanism, equivalent circuit, high temperature ceramic, impedance spectroscopy

中图分类号:

TM 22+8
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TM 22+8

程晋荣，石贵阳，祁玉发，陈建国，俞圣雯. BiFeO₃-PbTiO₃ 系高温压电陶瓷的阻抗谱分析[J]. 上海大学学报(自然科学版), 2011, 17(4): 535-540.

CHENG Jin-rong,SHI Gui-yang,QI Yu-fa,CHEN Jian-guo,YU Sheng-wen. Impedance Spectroscopy Study of High Temperature BiFeO₃-PbTiO₃ Based Ceramics[J]. Journal of Shanghai University（Natural Science Edition）, 2011, 17(4): 535-540.

BiFeO₃-PbTiO₃ 系高温压电陶瓷的阻抗谱分析

Impedance Spectroscopy Study of High Temperature BiFeO₃-PbTiO₃ Based Ceramics

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