Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic

Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic

Single-phase BaFe0.5Nb0.5O3 (BFN) ceramics were prepared by solid-state reaction method and were characterized by X-ray Diffraction (XRD) technique. Then, impedance spectroscopy measurements were conducted in a frequency range from 100 Hz to 1 MHz and in a temperature range from 293 to 600 K. Relaxa...

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Main Authors: Intatha U., Eitssayeam S., Wang J., Tunkasiri T.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-69249212458&partnerID=40&md5=9c3b30e01d197b17605d65b953d255e8
http://cmuir.cmu.ac.th/handle/6653943832/6377
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Language: English
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spelling th-cmuir.6653943832-63772014-08-30T03:24:09Z Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic Intatha U. Eitssayeam S. Wang J. Tunkasiri T. Single-phase BaFe0.5Nb0.5O3 (BFN) ceramics were prepared by solid-state reaction method and were characterized by X-ray Diffraction (XRD) technique. Then, impedance spectroscopy measurements were conducted in a frequency range from 100 Hz to 1 MHz and in a temperature range from 293 to 600 K. Relaxation phenomena of non-Debye type have been observed in the BFN ceramics, as confirmed by the Cole-Cole plots. The higher values of ε′ at the lower frequencies are explained on the basis of the Maxwell-Wagner (MW) polarization model. Complex impedance analysis enables us to separate the contributions from grains and grain boundaries of our samples. We found that at higher temperatures grain boundary resistance is higher than grain resistance, irrespective of composition. Crown Copyright © 2009. 2014-08-30T03:24:09Z 2014-08-30T03:24:09Z 2010 Article 15671739 10.1016/j.cap.2009.04.006 http://www.scopus.com/inward/record.url?eid=2-s2.0-69249212458&partnerID=40&md5=9c3b30e01d197b17605d65b953d255e8 http://cmuir.cmu.ac.th/handle/6653943832/6377 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Single-phase BaFe0.5Nb0.5O3 (BFN) ceramics were prepared by solid-state reaction method and were characterized by X-ray Diffraction (XRD) technique. Then, impedance spectroscopy measurements were conducted in a frequency range from 100 Hz to 1 MHz and in a temperature range from 293 to 600 K. Relaxation phenomena of non-Debye type have been observed in the BFN ceramics, as confirmed by the Cole-Cole plots. The higher values of ε′ at the lower frequencies are explained on the basis of the Maxwell-Wagner (MW) polarization model. Complex impedance analysis enables us to separate the contributions from grains and grain boundaries of our samples. We found that at higher temperatures grain boundary resistance is higher than grain resistance, irrespective of composition. Crown Copyright © 2009.
format Article
author Intatha U.
Eitssayeam S.
Wang J.
Tunkasiri T.
spellingShingle Intatha U.
Eitssayeam S.
Wang J.
Tunkasiri T.
Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
author_facet Intatha U.
Eitssayeam S.
Wang J.
Tunkasiri T.
author_sort Intatha U.
title Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
title_short Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
title_full Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
title_fullStr Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
title_full_unstemmed Impedance study of giant dielectric permittivity in BaFe0.5Nb0.5O3 perovskite ceramic
title_sort impedance study of giant dielectric permittivity in bafe0.5nb0.5o3 perovskite ceramic
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-69249212458&partnerID=40&md5=9c3b30e01d197b17605d65b953d255e8
http://cmuir.cmu.ac.th/handle/6653943832/6377
_version_ 1681420602444873728

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