Studies on the Effect of Li2SO4 on the Structure of Lithium Borate Glasses

Ganguli, Munia and Rao, KJ (1999) Studies on the Effect of Li2SO4 on the Structure of Lithium Borate Glasses. In: Journal of Physical Chemistry B, The, 103 (6). 920-930 .

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Abstract

Thermal and spectroscopic investigations have been carried out on a number of glasses with a wide range of compositions in the pseudoternary glass system, Li2SO4-Li2O-B2O3, to understand the role of sulfate ions in modifying the borate glass structure. Both nuclear magnetic resonance (NMR) and infrared (IR) spectroscopic results indicate that four-coordinate boron atoms are retained in the glass structure to a greater extent in sulfate-containing glasses than in pure lithium borate glasses. There seems to be some evidence for the existence of sulfoborate-type units in Raman spectra in the region of 800-960 cm(-1). These conclusions are supported by the observed behavior of glass transition temperatures and molar volumes. The possibility of formation of sulfoborate-type units is discussed from bonding and thermodynamic points of view.

Item Type:	Journal Article
Publication:	Journal of Physical Chemistry B, The
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	30 Jun 2011 07:32
Last Modified:	30 Jun 2011 07:32
URI:	http://eprints.iisc.ac.in/id/eprint/38812

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