Table of Contents
SRX Physics
Volume 2010, Article ID 927056, 6 pages
http://dx.doi.org/10.3814/2010/927056
Research Article

Infrared Spectroscopic Characterization of Tellurite Glasses Containing Heavy Metal Oxides

1Glassy Materials Research Laboratory (GMRL), Department of Physics, Osmania University, Hyderabad 500 007, India
2Pulla Reddy Institute of Technology, Vargal, Madak, A.P., India

Received 13 July 2009; Revised 28 October 2009; Accepted 15 November 2009

Copyright © 2010 G. Upender 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

The infrared (IR) spectra of (100-x)TeO2–xWO3 glasses reveal that the glass network consists of [TeO3]/[TeO3+1], [TeO4], [WO4], and [WO6] groups as basic structural units. Addition of WO3 oxide to the binary TeO2–WO3 glasses increases the amount of lower coordination of [TeO3]/[TeO3+1] units and decreases the higher coordination of [TeO4] units and also the formation of Te–O–W linkages at the expense of Te–O–Te linkages. The IR spectra of 60TeO2–(40-x)WO3–xPbO glasses reveal that the glass network consists of [TeO3], [TeO4], [WO4], [WO6], and [PbO4] units. Changes in the coordination state of tellurium and tungsten ions occur when the PbO and WO3 concentrations are varied. The dual role of the lead ions is confirmed in 60TeO2–(40-x)WO3–xPbO glass system. The W ion coordination state changes from 4 to 6 when WO3 concentration increases beyond 30 mol% in both (100-x)TeO2–xWO3 and 60TeO2–(40-x)WO3–xPbO glass systems. The IR spectra of 60B2O3–10TeO2–(30-x)ZnO–xPbO glasses reveal that the glass network consists of [TeO3], [BO3], and [BO4] groups.