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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6498

Title: Dielectric properties of A- and B-site doped BaTiO(3): Effect of La and Ga
Authors: GULWADE, D
GOPALAN, P
Keywords: barium-titanate ceramics
ferroelectric phase-transition
relaxor ferroelectrics
solid-solutions
state
pbtio3
origin
Issue Date: 2009
Publisher: ELSEVIER SCIENCE BV
Citation: PHYSICA B-CONDENSED MATTER, 404(41609), 1799-1805
Abstract: Extremely small amounts of La and Ga doping on the A- and B-site of BaTiO(3), respectively, resulting in a solid solution of the type Ba(1-3x)La(2x)Ti(1-3y)Ga(4y)O(3) have been investigated. The present work dwells on the influence of the individual dopants, namely La and Ga, on the dielectric properties of BaTiO(3). The compositions have been prepared by solid-state reaction. X-ray diffraction (XRD) reveals the presence of tetragonal (P4/mmm) phase. The XRD data has been analyzed using FULLPROF, a Rietveld refinement package. The microstructure have been studied by orientation imaging microscopy (OIM). The compositions have been characterized by dielectric spectroscopy between room temperature and 250 degrees C. Further, the nature of phase transition has been studied using high temperature XRD. The resulting Compounds exhibit high dielectric constant, enhanced diffuseness and low temperature coefficient of capacitance. (C) 2009
URI: http://dx.doi.org/10.1016/j.physb.2009.02.026
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6498
http://hdl.handle.net/10054/6498
ISSN: 0921-4526
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