Dielectric Relaxation in CaO-Bi2O3-B2O3 Glasses

Majhi, Koushik and Varma, Kalidhindi BR (2010) Dielectric Relaxation in CaO-Bi2O3-B2O3 Glasses. In: International Journal of Applied Ceramic Technology, 7 (Sp. Is). E89-E97.

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Abstract

Glasses in the system CaO-Bi2O3-B2O3 (in molar ratio) have been prepared using melt-quenching route. Ion transport characteristics were investigated for this glass using electric modulus, ac conductivity and impedance measurements. The ac conductivity was rationalized using Almond-West power law. Dielectric relaxation has been analyzed based on the behavior of electric modulus behavior. The activation energy associated with the electrical relaxation determined from the electric modulus spectra was found to be 1.76 eV, close to that the activation energy for dc conductivity (1.71 eV) indicating that the same species took part in both the processes. The stretched exponent beta (0.5-0.6) is invariant with temperature for the present glasses.

Item Type:	Journal Article
Publication:	International Journal of Applied Ceramic Technology
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	04 Jul 2011 08:20
Last Modified:	04 Jul 2011 08:20
URI:	http://eprints.iisc.ac.in/id/eprint/38885

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