Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic

Single-phase cubic Ba(Fe,Nb)0.5O3 (BFN) powder was synthesized by solid-state reaction at 1443 K for 4 hour in air. X-ray diffraction indicated that the BFN oxide mixture calcined at 1200°C crystallizes to the pure cubic perovskite phase. BFN ceramics were produced from this powder by sintering at 1...

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Main Authors: Intatha U., Eitssayeam S., Tunkasiri T.
Format: Conference or Workshop Item
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-55949099278&partnerID=40&md5=c37aad3ff150b9fbbdc5d7f656a8e68e
http://cmuir.cmu.ac.th/handle/6653943832/5460
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-54602014-08-30T02:56:33Z Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic Intatha U. Eitssayeam S. Tunkasiri T. Single-phase cubic Ba(Fe,Nb)0.5O3 (BFN) powder was synthesized by solid-state reaction at 1443 K for 4 hour in air. X-ray diffraction indicated that the BFN oxide mixture calcined at 1200°C crystallizes to the pure cubic perovskite phase. BFN ceramics were produced from this powder by sintering at 1623-1673 K for 4 hrs in air. Samples prepared under these conditions achieved up to 94.7% of the theoretical density. The temperature dependence of their dielectric constant and loss tangent, measured at difference frequencies, shows an increase in the dielectric constant with temperature which is probably due to disorder on the B site ion of the perovskite. Non-Debye type of relaxation phenomena has been observed in the BFN ceramics as confirmed by Cole-Cole plots. The higher value of ε′ at the lower frequency is explained on the basis of the Maxwell-Wagner (MW) polarization model. © 2008 World Scientific Publishing Company. 2014-08-30T02:56:33Z 2014-08-30T02:56:33Z 2008 Conference Paper 02179792 IJPBE http://www.scopus.com/inward/record.url?eid=2-s2.0-55949099278&partnerID=40&md5=c37aad3ff150b9fbbdc5d7f656a8e68e http://cmuir.cmu.ac.th/handle/6653943832/5460 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Single-phase cubic Ba(Fe,Nb)0.5O3 (BFN) powder was synthesized by solid-state reaction at 1443 K for 4 hour in air. X-ray diffraction indicated that the BFN oxide mixture calcined at 1200°C crystallizes to the pure cubic perovskite phase. BFN ceramics were produced from this powder by sintering at 1623-1673 K for 4 hrs in air. Samples prepared under these conditions achieved up to 94.7% of the theoretical density. The temperature dependence of their dielectric constant and loss tangent, measured at difference frequencies, shows an increase in the dielectric constant with temperature which is probably due to disorder on the B site ion of the perovskite. Non-Debye type of relaxation phenomena has been observed in the BFN ceramics as confirmed by Cole-Cole plots. The higher value of ε′ at the lower frequency is explained on the basis of the Maxwell-Wagner (MW) polarization model. © 2008 World Scientific Publishing Company.
format Conference or Workshop Item
author Intatha U.
Eitssayeam S.
Tunkasiri T.
spellingShingle Intatha U.
Eitssayeam S.
Tunkasiri T.
Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
author_facet Intatha U.
Eitssayeam S.
Tunkasiri T.
author_sort Intatha U.
title Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
title_short Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
title_full Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
title_fullStr Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
title_full_unstemmed Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
title_sort giant dielectric behavior of bafe0.5nb0.5o 3 perovskite ceramic
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-55949099278&partnerID=40&md5=c37aad3ff150b9fbbdc5d7f656a8e68e
http://cmuir.cmu.ac.th/handle/6653943832/5460
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