Strong to fragile transition in a model of liquid silica
Materials Science
2008-02-03 v1
Abstract
The transport properties of an ionic model for liquid silica at high temperatures and pressure are investigated using molecular dynamics simulations. With increasing pressure, a clear change from "strong" to "fragile" behaviour (according to Angell's classification of glass-forming liquids) is observed, albeit only on the small viscosity range that can be explored in MD simulations.. This change is related to structural changes, from an almost perfect four-fold coordination to an imperfect five or six-fold coordination. (submitted to "Molecular Simulation")
Keywords
Cite
@article{arxiv.cond-mat/9612154,
title = {Strong to fragile transition in a model of liquid silica},
author = {Jean-Louis Barrat and James Badro and Philippe Gillet},
journal= {arXiv preprint arXiv:cond-mat/9612154},
year = {2008}
}
Comments
5 pages, latex, 6 postscript figures