Table of Contents
ISRN Ceramics
Volume 2013 (2013), Article ID 419183, 11 pages
http://dx.doi.org/10.1155/2013/419183
Research Article

Physical, Optical, and Spectroscopic Studies on MgO-BaO-B2O3 Glasses

1Department of Physics, Muffakham Jah College of Engineering & Technology, Hyderabad 500034, India
2Department of Physics, Osmania University, Hyderbad, Andhra Pradesh 500007, India
3Department of Physics, Vasavi College of Engineering, Ibrahimbagh, Hyderabad 500031, India
4Department of Physics, Bhawan’s New Science College, Narayanaguda, Hyderbad, Andhra Pradesh 500029, India

Received 8 September 2013; Accepted 3 November 2013

Academic Editors: K. L. Bing, D. Jia, and O. P. Thakur

Copyright © 2013 Samdani 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 mixed alkaline effect in double alkaline borate glasses MgO-BaO-B2O3 containing small proportions of copper oxide (CuO) has been studied. The glass samples are characterized by optical absorption, electron paramagnetic resonance (EPR), and Fourier transform infrared spectroscopy (FTIR). A red shift in optical absorption peaks with increasing MgO (decreasing BaO) concentration has been observed. The values of “” tensor and hyperfine “” tensor have shown inflections with glass composition. The number of spins and paramagnetic susceptibility () also exhibited mixed alkaline effect. The broadening of glass network with increase in MgO concentration is found from the FTIR spectra. Interestingly both density and molar volume have shown decreasing trend with glass composition. The optical band gaps exhibited a nonlinear compositional dependence. As expected, the glass samples possessed higher values of optical basicity (Λ), molar electronic polarizability (), and Urbach energy ().