Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/60728
Title: Giant dielectric behavior of BaFe0.5Nb0.5O 3 perovskite ceramic
Authors: Uraiwan Intatha
Sukum Eitssayeam
Tawee Tunkasiri
Keywords: Physics and Astronomy
Issue Date: 20-Oct-2008
Abstract: 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.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=55949099278&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/60728
ISSN: 02179792
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.


Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.