publication . Preprint . 1996

Strong to fragile transition in a model of liquid silica

Barrat, Jean-Louis; Badro, James; Gillet, Philippe;
Open Access English
  • Published: 17 Dec 1996
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")
free text keywords: Condensed Matter - Materials Science
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