elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

The Dynamics of Silica Melts under High Pressure: Mode-Coupling Theory Results

Voigtmann, Thomas and Horbach, Jürgen (2008) The Dynamics of Silica Melts under High Pressure: Mode-Coupling Theory Results. Journal of Physics - Condensed Matter, 20, 244117/1-244117/7. DOI: 10.1088/0953-8984/20/24/244117.

Full text not available from this repository.

Abstract

The high-pressure dynamics of a computer-modeled silica melt is studied in the framework of the mode-coupling theory of the glass transition (MCT) using static-structure input from molecular-dynamics (MD) computer simulation. The theory reproduces the experimentally known viscosity minimum (diffusivity maximum) as a function of density or pressure and explains it in terms of a corresponding minimum in its critical temperature. This minimum arises from a gradual change in the equilibrium static structure which shifts from being dominated by tetrahedral ordering to showing the cageing known from high-density liquids. The theory is in qualitative agreement with computer simulation results.

Document Type:Article
Title:The Dynamics of Silica Melts under High Pressure: Mode-Coupling Theory Results
Authors:
AuthorsInstitution or Email of Authors
Voigtmann, ThomasUNSPECIFIED
Horbach, JürgenUNSPECIFIED
Date:2008
Journal or Publication Title:Journal of Physics - Condensed Matter
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:20
DOI:10.1088/0953-8984/20/24/244117
Page Range:244117/1-244117/7
Status:Published
Keywords:mode coupling theory, silica at high pressure, molecular dynamics computer simulation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dr.rer.nat. Jürgen Horbach
Deposited On:21 Oct 2008
Last Modified:27 Apr 2009 14:57

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.