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

Ganguli, Munia ; Rao, K. J. (1999) Studies on the Effect of Li2SO4 on the Structure of Lithium Borate Glasses The Journal of Physical Chemistry B, 103 (6). pp. 920-930. ISSN 1520-6106

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Official URL: http://doi.org/10.1021/jp982930z

Related URL: http://dx.doi.org/10.1021/jp982930z

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:Article
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ID Code:136733
Deposited On:25 Jun 2025 08:07
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