Table of Contents
Indian Journal of Materials Science
Volume 2015 (2015), Article ID 498254, 10 pages
http://dx.doi.org/10.1155/2015/498254
Research Article

Synthesis, Crystallization, and Dielectric Behaviour of Lead Bismuth Titanate Borosilicate Glasses with Addition of 1% La2O3

1Advanced Glass and Glass Ceramic Research Laboratory, Department of Physics, University of Lucknow, Lucknow 226007, India
2Department of Physics and Materials Science, Jaypee Institute of Information and Technology, Noida 201307, India

Received 9 May 2015; Accepted 16 June 2015

Academic Editor: Vladimir Privman

Copyright © 2015 C. R. Gautam et al. 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

Lead bismuth titanate borosilicate glasses were prepared in the glass system 65[()·TiO3]-34[2SiO2·B2O3]-1La2O3 () doped with one mole percent of via conventional melt quench method. The amorphous nature of glass samples in this glass system is confirmed by using X-ray diffraction (XRD) study. Differential thermal analysis (DTA) has been employed to determine the glass transition temperature, , as well as crystallization temperature, . DTA measurements were recorded in temperature range from 30 to 1200°C. The prepared glasses were crystallized by regulated controlled heat treatment process on the basis of their DTA results. These samples are carried out for XRD measurements in the 2 range from 20 to 80° to study the crystallization behaviour and phase formation of the glass ceramic samples. The scanning electron microscopy (SEM) of these glass ceramic samples has been carried out to explore the morphology through nucleation and growth of the crystallites in the glassy matrix. The values of dielectric constant as well as dielectric loss were increased with increasing the temperature within the frequency range from 20 Hz to 100 Hz. The addition of 1 mol% of to the lead bismuth titanate glasses enhances the crystallization and acts as donor dopant for this glass system.