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ISRN Materials Science
Volume 2013 (2013), Article ID 126805, 9 pages
http://dx.doi.org/10.1155/2013/126805
Research Article

Role of ZnO in Dc Electrical Conductivity of Lithium Bismuthate Glasses

Department of Physics, Osmania University, Hyderabad 500 007, India

Received 18 June 2013; Accepted 7 August 2013

Academic Editors: T. Pasinszki, M. Sliwa, and A. Vergara

Copyright © 2013 Shashidhar Bale and Syed Rahman. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Glasses of various compositions belonging to the Bi2O3-B2O3-ZnO-Li2O quaternary system were prepared using melt quench technique. Dc electric measurements were done on the samples, and activation energies are determined. Arrhenius plots showed straight line behaviour. It is observed that the conductivity of the samples increased with temperature and also with Li2O content, whereas the activation energy decreased with Li2O content. The isothermal plots for constant ZnO and constant Bi2O3 glasses revealed that the conduction in these glasses is due to lithium ions only. The isothermal plots for constant lithium containing glasses varied nonlinearly with two maxima, which is attributed to mixed former effect. The variation is explained based on Anderson-Stuart model.