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Molecular structure, configurational entropy and viscosity of silicate melts: Link through the Adam and Gibbs theory of viscous flow

Le Losq, Charles; Neuville, Daniel R.


The Adam and Gibbs theory depicts the viscous flow of silicate melts as governed by the cooperative re-arrangement of molecular sub-systems. Considering that such subsystems involve the silicate Qn units (n = number of bridging oxygens), this study presents a model that links the Qn unit fractions to the melt configurational entropy at the glass transition temperature Tg, Sconf(Tg), and finally, to its viscosity η. With 13 adjustable parameters, the model reproduces η and Tg of melts in the...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: Journal of Non-crystalline Solids
DOI: 10.1016/j.jnoncrysol.2017.02.010


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