Table of Contents
ISRN Spectroscopy
Volume 2012, Article ID 639041, 6 pages
Research Article

Effect of Annealing on Optical Properties of Glasses

1Department of Physics, Maharshi Dayanand University, Rohtak 124 001, India
2Electronic Science Department, Kurukshetra University, Kurukshetra 136119, India

Received 9 August 2012; Accepted 17 September 2012

Academic Editors: J. Casado, J.-H. Choi, and A. Polimeni

Copyright © 2012 Susheel Arora 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.


The Melt-quench method is used to synthesize zinc fluoroborate glasses with compositions (, 5, 10, 15, and 20). Optical characterization was carried out to examine the variation of optical bandgap energy () and urbach energy () with respect to the concentration for the samples annealed at different temperatures (, and ). Annealing shows its effect on the samples with the variations in the values of and . These variations are explained on the basis of formation of different molecular species like units, boroxol rings, and the change in the number of nonbridging oxygen atoms.