Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 357, Issue 3, Pages 858-863Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2010.11.103
Keywords
Optical band gap; Urbach energy; IR spectra; X-ray diffraction; Optical basicity
Funding
- DST, New Delhi [SR/WOS-A/PS-23/2009]
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SiO2-BaO-ZnO-xB(2)O(3)-(10-x)Y2O3 (0 <= x <= 10) glasses are synthesized. The effect of Y2O3 on the structural and optical properties of glasses has been investigated using different characterization techniques. The results are discussed in light of non-bridging oxygens (NBO), optical basicity and heat-treatment of glasses. The band gap has been calculated for as cast and heat-treated glasses. The band gap energy is found to decrease with the increasing content of Y2O3 in the glasses and heat-treatment. The presence of the crystalline phase in the glass matrix showed remarkable effect on band gap which decreases to semiconducting range. (C) 2010 Elsevier B.V. All rights reserved.
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