Goel, Puja and Biradar, Ashok Manikrao (2013) Atypical dielectric behavior in sol-gel derived fine grain PZT/CeO2 nanocomposites. Journal of Physics and Chemistry of Solids, 74 (6). pp. 854-861. ISSN 0022-3697

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Abstract

We present here dielectric and electrical modulus studies of sol-gel derived fine grain (100-x) PZT/xCeO(2) nanocomposites. Dielectric response shows superimposed local maxima(s) in high frequency regimes, which, in low frequency regions seems to be overshadowed by high conductivity. Observed local maxima(s) were found to be in concurrence with the nadir(s) observed in the imaginary part of electrical modulus plotted on the temperature plane. In addition to this, calculated bulk and grain boundary capacitance exhibit maxima(s) in the measured temperature range displaying the existence of both bulk and grain boundary transition in nanocomposite formation. Therefore, a collective effect of these two processes has been thought to be a plausible mechanism for observed dielectric behavior of nanocomposites. Anomalous increase in bulk transition temperature of 2 wt% ceria substituted nanocomposite was also observed. Possibilities of increase in transition temperature have also been discussed taking in to account the extrinsic size effect

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Elsevier
Subjects:	Chemistry Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:41
Last Modified:	19 Aug 2026 10:41
URI:	https://npl.csircentral.net/id/eprint/3335

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