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Structural and Electrical Properties of Lead-Free Perovskite Ba(Al(1/2)Nb(1/2))O(3)

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Title Structural and Electrical Properties of Lead-Free Perovskite Ba(Al(1/2)Nb(1/2))O(3)
 
Creator PRASAD, K
CHANDRA, KP
BHAGAT, S
CHOUDHARY, SN
KULKARNI, AR
 
Subject impedance spectroscopy
dielectric-relaxation
ceramics
bafe0.5nb0.5o3
 
Description Lead-free perovskite Ba(Al(1/2)Nb(1/2))O(3) was prepared by conventional ceramic fabrication technique at 1350 degrees C/5 h in air atmosphere. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software whereas crystallite size and lattice strain were estimated from Williamson-Hall approach. X-ray diffraction analysis of the compound indicated the formation of a single-phase monoclinic structure with the space group P2/m. EDAX and SEM studies were carried out in order to evaluate the quality and purity of the compound. Permittivity data showed low-temperature coefficient of capacitance (T(CC) = 14%) up to 100 degrees C. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using the impedance data. Complex impedance analyses suggested the dielectric relaxation to be of non-Debye type. The correlated barrier-hopping model was used to successfully explain the mechanism of charge transport in Ba(Al(1/2)Nb(1/2))O(3).
 
Publisher WILEY-BLACKWELL PUBLISHING, INC
 
Date 2011-09-01T12:41:48Z
2011-12-26T12:59:39Z
2011-12-27T05:52:13Z
2011-09-01T12:41:48Z
2011-12-26T12:59:39Z
2011-12-27T05:52:13Z
2010
 
Type Article
 
Identifier JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 93(1), 190-196
0002-7820
http://dx.doi.org/10.1111/j.1551-2916.2009.03394.x
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12780
http://hdl.handle.net/10054/12780
 
Language en