6533b835fe1ef96bd129f68d
RESEARCH PRODUCT
Channel Formation and Intermediate Range Order in Sodium Silicate Melts and Glasses
H. R. SchoberWalter KobJürgen HorbachFlorian KarglAndreas Meyersubject
Models MolecularSiliconSodiumNeutron diffractionFOS: Physical sciencesGeneral Physics and Astronomychemistry.chemical_elementSodium silicateInelastic scatteringInelastic neutron scatteringIonDiffusionchemistry.chemical_compoundIonic conductivityIonsModels StatisticalPhysicsSilicatesSodiumTemperatureDisordered Systems and Neural Networks (cond-mat.dis-nn)Condensed Matter - Disordered Systems and Neural NetworksOxygenchemistryChemical physicsGlassGlass transitiondescription
We use inelastic neutron scattering and molecular dynamics simulation to investigate the interplay between the structure and the fast sodium ion diffusion in various sodium silicates. With increasing temperature and decreasing density the structure factors exhibit an emerging prepeak around 0.9 A^-1. We show, that this prepeak has its origin in the formation of sodium rich channels in the static structure. The channels serve as preferential ion conducting pathways in the relative immobile Si-O matrix. On cooling below the glass transition this intermediate range order is frozen in.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-07-07 | Physical Review Letters |