Breakdown of the fractional Stokes-Einstein relation in silicate liquids

John C. Mauro, Adam J. Ellison

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The fractional Stokes-Einstein relation postulates a direct relationship between conductivity and shear flow. Like viscosity, the electrical resistivity of a glass-forming liquid exhibits a non-Arrhenius scaling with temperature. However, while both viscosity and resistivity are non-Arrhenius, here we show that these two properties follow distinct functional forms. Through analysis of 821 unique silicate liquids, we show that viscosity is best represented using the Mauro-Yue-Ellison-Gupta-Allan (MYEGA) model, whereas the resistivity of the same compositions more closely follows the Avramov-Milchev (AM) equation. Our results point to two fundamentally different mechanisms governing viscous flow and conductivity and therefore cast doubt on the general validity of the fractional Stokes-Einstein relation.

Original languageEnglish (US)
Pages (from-to)3924-3927
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume357
Issue number24
DOIs
StatePublished - Dec 1 2011

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Silicates
silicates
breakdown
Viscosity
viscosity
electrical resistivity
Liquids
liquids
conductivity
viscous flow
Viscous flow
Shear flow
axioms
shear flow
casts
scaling
Glass
glass
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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Breakdown of the fractional Stokes-Einstein relation in silicate liquids. / Mauro, John C.; Ellison, Adam J.

In: Journal of Non-Crystalline Solids, Vol. 357, No. 24, 01.12.2011, p. 3924-3927.

Research output: Contribution to journalArticle

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