Coondoo, Indrani and Agarwal, S. K. and Jha, A. K. (2009) Ferroelectric and piezoelectric properties of tungsten substituted SrBi2Ta2O9 ferroelectric ceramics. Materials Research Bulletin, 44 (6). pp. 1288-1292. ISSN 0025-5408

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Abstract

Tungsten substituted samples of compositions SrBi2(WxTa1−x)2O9 (x = 0.0, 0.025, 0.050, 0.075, 0.10 and 0.20) were synthesized by solid-state reaction method and studied for their microstructural, electrical conductivity, ferroelectric and piezoelectric properties. The X-ray diffractograms confirm the formation of single phase layered perovskite structure in the samples with x up to 0.05. The temperature dependence of dc conductivity vis-à-vis tungsten content shows a decrease in conductivity, which is attributed to the suppression of oxygen vacancies. The ferroelectric and piezoelectric studies of the W-substituted SBT ceramics show that the remanent polarization and d33 values increases with increasing concentration of tungsten up to x ≤ 0.05. Such compositions with low conductivity and high Pr values should be excellent materials for highly stable ferroelectric memory devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	A. Ceramics; C. X-ray diffraction; D. Ferroelectricity
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	29 Aug 2012 12:07
Last Modified:	29 Aug 2012 12:07
URI:	http://npl.csircentral.net/id/eprint/506

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