Qⁿ Distribution in Silicates: Alkali Silicate Glasses and Melts

Abstract:

Three-parameter statistical method of the calculation of Qn distribution in silicate melts and glasses has been developed. The method allows determining the concentrations of silicate structural units in wide compositions range at different temperatures when only the limited experimental data are available. The method is based on a destruction of the preassigned network as a model of the interaction of the modifier oxide with a silicon-oxygen framework. Qn distributions in binary alkali silicate glasses and melts were determined by this method. It was found that Qn distribution does not depend on a topology or dimension of the initial network. Moreover, a linear correlations were found to be exist between ln(1/wi) values (w1 and w2 are the first and second adjustment parameters) and 1/rM (rM is cation radius, M = Li, Na, K, Rb, Cs). These correlations allow using the concept of a “fictitious” cation radius in order to calculate of the Qn units at different temperatures.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 254-258
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.254
• Online since: August 2012
• Authors: Armenak A. Osipov, Leyla M. Osipova
• Keywords: Qⁿ Distribution, Silicate Glasses, Silicate Melts

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