Crystal structure and electrical properties of CaNaBi2Nb3O12 ceramics

Kumar, Sunil and Varma, KBR (2011) Crystal structure and electrical properties of CaNaBi2Nb3O12 ceramics. In: Journal of Materials Science , 46 (8). pp. 2606-2610.

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Abstract

Monophasic CaNaBi2Nb3O12 powders were synthesized via the conventional solid-state reaction route. Rietveld refinement of the X-ray powder diffraction (XRD) data and selected area electron diffraction (SAED) studies confirmed the phase to be a three-layer Aurivillius oxide associated with an orthorhombic B2cb space group. The dielectric properties of the ceramics have been studied in the 300-800 K temperature range at various frequencies (1 kHz to 1 MHz). A dielectric anomaly was observed at 676 K for all the frequencies corresponding to the ferroelectric to paraelectric phase transition as it was also corroborated by the high temperature X-ray diffraction studies. The incidence of the polarization-electric field (P vs. E) hysteresis loop demonstrated CaNaBi2Nb3O12 to be ferroelectric.

Item Type:	Journal Article
Publication:	Journal of Materials Science
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	07 Apr 2011 06:39
Last Modified:	07 Apr 2011 06:39
URI:	http://eprints.iisc.ac.in/id/eprint/36010

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