Molecular-dynamics analysis of the structural properties of silica during cooling

Byoung Min Lee, Shinji Munetoh, Teruaki Motooka, Yeo Wan Yun, Kyu Mann Lee

Research output: Contribution to journalConference article

Abstract

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.

Original languageEnglish
Pages (from-to)101-106
Number of pages6
JournalSolid State Phenomena
Volume139
DOIs
Publication statusPublished - Jan 1 2008
EventTheory, Modeling and Numerical Simulation of Multi-Physics Materials Behavior - Boston, MA, United States
Duration: Nov 26 2007Nov 30 2007

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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