Designing the Network Former Speciation in Oxide Glasses using Statistical Mechanics

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Abstract

Predicting the compositional evolution of the atomic-scale structure, particularly the network former speciation, in oxide glasses is important for tailoring their macroscopic properties. Experimental and computational techniques such as nuclear magnetic resonance (NMR) spectroscopy and molecular dynamics (MD) simulations, respectively, have successfully been used to understand the local structural environment of typical network formers such as silicon, phosphorous, and boron in simple glass systems. However, prediction of the structural speciation in multicomponent glasses with mixed network formers remains challenging. Here, building on the NMR and MD results, we present a statistical description of the compositional evolution of short-range structural units in multicomponent oxide glasses. This is done by accounting for the relative enthalpic and entropic contributions to the bonding preferences in binary formermodifier systems. These parameters are then transferred to predict the structural evolution in more complex multicomponent glasses without additional free parameters or input from any experimental data.
Original languageEnglish
Publication date9 Sep 2019
Number of pages1
Publication statusPublished - 9 Sep 2019
Event4th International Workshop on Glass & Entropy - University of Jena, Jena, Germany
Duration: 9 Sep 201912 Sep 2019
http://glas.uni-jena.de/osc2019/

Conference

Conference4th International Workshop on Glass & Entropy
LocationUniversity of Jena
CountryGermany
CityJena
Period09/09/201912/09/2019
Internet address

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