Molecular-Dynamics Analysis of the Structural Properties of Silica during Cooling

Abstract:

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The structural properties of SiO2 liquid during cooling have been investigated by molecular dynamics simulations. The interatomic forces acting on the particles are calculated by the modified Tersoff potential parameters. The glass transition temperature and structural properties of the resulting SiO2 system at various temperatures have been investigated. The fivefold coordinations of Si and threefold coordinations of O atoms were observed, and the coordination defects of system decrease with decreasing temperature up to 17 % at 300 K. The self-diffusion coefficients for Si and O atoms drop to almost zero below 3000 K. The structures were distorted at high temperatures, but very stable atomic network persisted up to high temperature in the liquid state.

Info:

Periodical:

Solid State Phenomena (Volume 139)

Edited by:

Veena Tikare, Graeme E. Murch, Frédéric Soisson and Jeung Ku Kang

Pages:

101-106

DOI:

10.4028/www.scientific.net/SSP.139.101

Citation:

B. M. Lee et al., "Molecular-Dynamics Analysis of the Structural Properties of Silica during Cooling", Solid State Phenomena, Vol. 139, pp. 101-106, 2008

Online since:

April 2008

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Price:

$35.00

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