Structure-topology-property correlations of sodium phosphosilicate glasses

Christian Hermansen, Xiaoju Guo, Randall E. Youngman, John C. Mauro, Morten M. Smedskjaer, Yuanzheng Yue

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Abstract

In this work, we investigate the correlations among structure, topology, and properties in a series of sodium phosphosilicate glasses with [SiO2]/[SiO2 + P2O5] ranging from 0 to 1. The network structure is characterized by 29Si and 31P magic-angle spinning nuclear magnetic resonance and Raman spectroscopy. The results show the formation of six-fold coordinated silicon species in phosphorous-rich glasses. Based on the structural data, we propose a formation mechanism of the six-fold coordinated silicon, which is used to develop a quantitative structural model for predicting the speciation of the network forming units as a function of chemical composition. The structural model is then used to establish a temperature-dependent constraint description of phosphosilicate glass topology that enables prediction of glass transition temperature, liquid fragility, and indentation hardness. The topological constraint model provides insight into structural origin of the mixed network former effect in phosphosilicate glasses.

Original languageEnglish (US)
Article number064510
JournalJournal of Chemical Physics
Volume143
Issue number6
DOIs
StatePublished - Aug 14 2015

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Hermansen, C., Guo, X., Youngman, R. E., Mauro, J. C., Smedskjaer, M. M., & Yue, Y. (2015). Structure-topology-property correlations of sodium phosphosilicate glasses. Journal of Chemical Physics, 143(6), [064510]. https://doi.org/10.1063/1.4928330