Mixed alkali effect in  Li2O-Na2O-WO3-TeO2 glasses : Optical Parameters

Authors

  • Kalsani Venkateshwarlu  Department of Physical Sciences, Kakatiya Institute of Technology & Science, Warangal, India

Keywords:

Mixed Alkali Effect, Tungsten Based Glasses, Density, Glass Transition Temperature, Optical Absorption.

Abstract

Glasses with composition xLi2O-(30-x)Na2O-20WO3-50TeO2 (where x= 0, 5, 10, 15, 20, 25 and 30 mol%) have been prepared using the melt quenching technique. In the present work, the mixed alkali effect (MAE) has been investigated in the above glass system through density and modulated DSC studies. The density and glass transition temperature of the present gasses varies non-linearly, the exhibiting the mixed alkali effect. From the optical absorption studies, the values of direct optical band gap, indirect optical band gap energy (Eo) and Urbach energy(ΔE) have been evaluated. The values of Eo and ΔE vary non-linearly with composition parameter, showing the mixed alkali effect.

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International Journal of Scientific Research in Science, Engineering and Technology

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Published

2017-10-31

Issue

Volume 3, Issue 6, September-October-2017

Section

Research Articles

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How to Cite

[1]
Kalsani Venkateshwarlu, " Mixed alkali effect in  Li2O-Na2O-WO3-TeO2 glasses : Optical Parameters, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 6, pp.672-675, September-October-2017.