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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7495

Title: Study of diffuse phase transition in BaTiO(3)-LaAlO(3)
Authors: GULWADE, D
GOPALAN, P
Keywords: barium-titanate ceramics
dielectric-properties
la
batio3
al
Issue Date: 2009
Publisher: ELSEVIER SCIENCE SA
Citation: JOURNAL OF ALLOYS AND COMPOUNDS, 481(1-2), 316-319
Abstract: BaTiO(3)-LaAlO(3) systems of the type Ba(1-3x)La(2x)Ti(1-3x)Al(4x)O(3) and Ba(1-x)La(x)Ti(1-x)Al(x)O(3) have been investigated. The compositions in each of the systems have been prepared by solid-state reaction. The presence of a perovskite single phase is confirmed using X-ray diffraction (XRD). XRD data has been analyzed using a Rietveld refinement package and lattice parameters have been extracted. The microstructure of sintered pellets has been investigated using SEM. The compositions have been characterized by dielectric spectroscopy between room temperature and 250 degrees C. The resulting compounds exhibit a significant enhancement of the dielectric constant and diffuseness. The compositions with higher diffuseness have been characterized using high-temperature XRD to study the nature of the phase transition. On the basis of the high-temperature XRD data, core-shell structure is ruled out. (C) 2009
URI: http://dx.doi.org/10.1016/j.jallcom.2009.02.141
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7495
http://hdl.handle.net/10054/7495
ISSN: 0925-8388
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