Structure of Ca–Sr–Ba Sodium–Borosilicate Glasses according to 11B and 29Si NMR Spectroscopy


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Abstract

The structure of borosilicate glasses is studied with 11B and 29Si NMR spectroscopy in order to investigate the influence of replacement of Na2O by oxides of alkali earth metals on their local structure. The quantitative data are analyzed with respect to their correspondence to the criterion of the average charge of the structural unit. The reasons for the deviation between the experimental results and this criterion are considered. It is shown that, in the case of glass devoid of borate structural units with nonbridging oxygen atoms, the corrected contents of these units are consistent with the predictions of thermodynamic modeling of the structure and properties of oxide glasses.

About the authors

A. A. Osipov

Institute of Mineralogy, Ural Branch

Author for correspondence.
Email: armik@mineralogy.ru
Russian Federation, Miass, 456317

V. E. Eremyashev

Institute of Mineralogy, Ural Branch; South Urals State University

Email: armik@mineralogy.ru
Russian Federation, Miass, 456317; Chelyabinsk, 454080

L. M. Osipova

Institute of Mineralogy, Ural Branch

Email: armik@mineralogy.ru
Russian Federation, Miass, 456317

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