Dielectric relaxation and electrical properties of Sm0.5Bi4.5Ti3FeO15 ceramics

Fida Rehman; Lin Wang; Hai Bo Jin; Pervaiz Ahmad; Yongjie Zhao; Jing Bo Li

doi:10.1016/j.jallcom.2017.03.213

Dielectric relaxation and electrical properties of Sm_0.5Bi_4.5Ti₃FeO₁₅ ceramics

Fida Rehman, Lin Wang, Hai Bo Jin, Pervaiz Ahmad, Yongjie Zhao, Jing Bo Li^*

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Single-phase Aurivillius Sm_0.5Bi_4.5Ti₃FeO₁₅ ceramics was synthesized by the conventional solid-state reaction technique. Dielectric response and electrical properties of the ceramics were investigated in a wide range of temperature and frequency by dielectric and impedance spectroscopies. Two dielectric relaxation behaviors were distinguished by the combination of impedance and electric modulus analysis which could be attributed to the contributions of grains and grain boundaries, respectively. The resistance of grain boundaries was found to be much larger than that of grains, whereas the capacitances were in the same level. A ferroelectric phase transition was observed to take place at ∼440 °C. The kinetic analysis was performed to study the corresponding relaxation-conduction mechanisms in the material. Above 270 °C the conduction behavior of the compound was ascribed to the motion of ionized oxygen vacancies.

Original language	English
Pages (from-to)	686-691
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	709
DOIs	https://doi.org/10.1016/j.jallcom.2017.03.213
Publication status	Published - 2017

Keywords

Aurivillius compound
Defects
Dielectric
Electrical properties
Impedance analysis

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10.1016/j.jallcom.2017.03.213

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title = "Dielectric relaxation and electrical properties of Sm0.5Bi4.5Ti3FeO15 ceramics",

abstract = "Single-phase Aurivillius Sm0.5Bi4.5Ti3FeO15 ceramics was synthesized by the conventional solid-state reaction technique. Dielectric response and electrical properties of the ceramics were investigated in a wide range of temperature and frequency by dielectric and impedance spectroscopies. Two dielectric relaxation behaviors were distinguished by the combination of impedance and electric modulus analysis which could be attributed to the contributions of grains and grain boundaries, respectively. The resistance of grain boundaries was found to be much larger than that of grains, whereas the capacitances were in the same level. A ferroelectric phase transition was observed to take place at ∼440 °C. The kinetic analysis was performed to study the corresponding relaxation-conduction mechanisms in the material. Above 270 °C the conduction behavior of the compound was ascribed to the motion of ionized oxygen vacancies.",

keywords = "Aurivillius compound, Defects, Dielectric, Electrical properties, Impedance analysis",

author = "Fida Rehman and Lin Wang and Jin, {Hai Bo} and Pervaiz Ahmad and Yongjie Zhao and Li, {Jing Bo}",

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year = "2017",

doi = "10.1016/j.jallcom.2017.03.213",

language = "English",

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pages = "686--691",

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T1 - Dielectric relaxation and electrical properties of Sm0.5Bi4.5Ti3FeO15 ceramics

AU - Rehman, Fida

AU - Wang, Lin

AU - Jin, Hai Bo

AU - Ahmad, Pervaiz

AU - Zhao, Yongjie

AU - Li, Jing Bo

PY - 2017

Y1 - 2017

N2 - Single-phase Aurivillius Sm0.5Bi4.5Ti3FeO15 ceramics was synthesized by the conventional solid-state reaction technique. Dielectric response and electrical properties of the ceramics were investigated in a wide range of temperature and frequency by dielectric and impedance spectroscopies. Two dielectric relaxation behaviors were distinguished by the combination of impedance and electric modulus analysis which could be attributed to the contributions of grains and grain boundaries, respectively. The resistance of grain boundaries was found to be much larger than that of grains, whereas the capacitances were in the same level. A ferroelectric phase transition was observed to take place at ∼440 °C. The kinetic analysis was performed to study the corresponding relaxation-conduction mechanisms in the material. Above 270 °C the conduction behavior of the compound was ascribed to the motion of ionized oxygen vacancies.

AB - Single-phase Aurivillius Sm0.5Bi4.5Ti3FeO15 ceramics was synthesized by the conventional solid-state reaction technique. Dielectric response and electrical properties of the ceramics were investigated in a wide range of temperature and frequency by dielectric and impedance spectroscopies. Two dielectric relaxation behaviors were distinguished by the combination of impedance and electric modulus analysis which could be attributed to the contributions of grains and grain boundaries, respectively. The resistance of grain boundaries was found to be much larger than that of grains, whereas the capacitances were in the same level. A ferroelectric phase transition was observed to take place at ∼440 °C. The kinetic analysis was performed to study the corresponding relaxation-conduction mechanisms in the material. Above 270 °C the conduction behavior of the compound was ascribed to the motion of ionized oxygen vacancies.

KW - Aurivillius compound

KW - Defects

KW - Dielectric

KW - Electrical properties

KW - Impedance analysis

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DO - 10.1016/j.jallcom.2017.03.213

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AN - SCOPUS:85016043472

SN - 0925-8388

VL - 709

SP - 686

EP - 691

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Dielectric relaxation and electrical properties of Sm_0.5Bi_4.5Ti₃FeO₁₅ ceramics

Abstract

Keywords

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