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Channel Diffusion in Sodium Silcate Melts

Meyer, Andreas and Kargl, Florian and Horbach, Jürgen (2012) Channel Diffusion in Sodium Silcate Melts. Neutron News, 23 (3), pp. 35-37. Taylor & Francis, London. DOI: 10.1080/10448632.2012.695716.

Full text not available from this repository.

Official URL: http://www.tandfonline.com/loi/gnnw20

Abstract

We used quasielastic neutron scattering and molecular dynamics simulations in order to study the interplay of intermediate range order, atomic dynamics and properties of mass transport in sodium silicate melts. Our results show that the sodium ions align in sodium rich channels that disrupt the Si-O structure and that form a percolation network. The sodium ions diffuse along these channels in a relatively immobile Si-O network. The diffusion via these channels results in a decoupling of incoherent from coherent correlations of the sodium relaxation, as evidenced by simulation and experiment. A characteristic length scale for this channel structure is marked by prepeaks in the elastic structure factors at about q = 0.9 Å-1, corresponding to length scales of the order of 7 Å.

Document Type:Article
Title:Channel Diffusion in Sodium Silcate Melts
Authors:
AuthorsInstitution or Email of Authors
Meyer, AndreasDLR Institut für Materialphysik im Weltraum
Kargl, FlorianDLR Institut für Materialphysik im Weltraum
Horbach, JürgenHeinrich-Heine-Universität, Düsseldorf
Date:13 August 2012
Journal or Publication Title:Neutron News
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:23
DOI:10.1080/10448632.2012.695716
Page Range:pp. 35-37
Publisher:Taylor & Francis, London
Series Name:Neutron News
Status:Published
Keywords:quasi-elastic neutron scattering, molecular dynamics simulation, sodium silicate melts, melt structure - atomic diffusion relation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Prof.Dr. Andreas Meyer
Deposited On:05 Oct 2012 09:04
Last Modified:04 Apr 2013 16:38

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