Relaxation and shear viscosity in mixed ionic melts

A. Kisliuk, S. Loheider, A. Sokolov, M. Soltwisch, D. Quitmann, E. Shasha, A. Voronel

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

A linear dependence was found between the reorientational linewidth for alkali nitrate melts, obtained by Raman measurements, and the ratio of temperature divided by shear viscosity. An interpretation of this result in the framework of the Stokes-Einstein-Debye (SED) model leads to a volume for the NO3 anion which is very close to a literature value. Using this volume, a relaxation time could be derived from static shear viscosity over a wide temperature range, for the well-known glass forming substance Ca2K3(NO3)7. The calculated relaxation time compares favorably with relaxation times obtained by other methods. This agreement supports the validity of a simple SED model over a wide frequency range.

Original languageEnglish
Pages (from-to)R13083-R13086
JournalPhysical Review B
Volume52
Issue number18
DOIs
StatePublished - 1995
Externally publishedYes

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