Grains and grain boundaries contribution to dielectric relaxations and conduction of Bi5Ti3FeO15 ceramics

被引：35
|
作者：
Rehman, Fida [1 ]
Li, Jing-Bo [1 ]
Zhang, Jia-Song [1 ]
Rizwan, Muhammad [1 ]
Niu, Changlei [1 ]
Jin, Hai-Bo [1 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2015年 / 118卷 / 21期
基金：
中国国家自然科学基金;
关键词：
ELECTRICAL-PROPERTIES; MAGNETIC-PROPERTIES; SPECTROSCOPY; IMPEDANCE; BEHAVIOR;
D O I：
10.1063/1.4936782
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Dielectric relaxation behaviors of Aurivillius Bi5Ti3FeO15 ceramics were investigated in a wide range of frequency and temperature via dielectric and impedance spectroscopies. We distinguished two dielectric relaxations using the combination of impedance and modulus analysis. Resistance of the grain boundary was found to be much larger than grains, whereas capacitance was at the same level. The kinetic analysis of dielectric data was carried out to evaluate the contributions of microstructure and defects to the relaxation and conduction. The possible relaxation-conduction mechanism in the ceramics was discussed. The results enable deep understanding of microstructure-defect-relaxation behaviors in Bi5Ti3FeO15 ceramics. (C) 2015 AIP Publishing LLC.
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页数：6
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