1. Viscosity and Structural Transition in As1-xSxGlass Forming Liquids
- Author
-
G. Chaussemy, Jean-Marie Mackowski, and Jean Fornazero
- Subjects
Arrhenius equation ,Chemistry ,Mineralogy ,Thermodynamics ,Activation energy ,Condensed Matter Physics ,Glass forming ,Electronic, Optical and Magnetic Materials ,symbols.namesake ,Viscosity ,Structural change ,Materials Chemistry ,symbols ,Structural transition ,Physical and Theoretical Chemistry - Abstract
The kinematic viscosity of As1-x Sx liquids exhibits a strong continuous change when x reaches a critical value xc s = 0.525. In the Arrhenius' representation the apparent activation energy changes abruptly at x = xc s this transition is attributed to a structural change from a dissociated to a polymeric associated liquid. The high viscosity range corresponds exactly to the easy glass forming compositions. La viscosite cinematique des liquides As1-x Sx presente une transition importante a x = xc s = 0.525. En representation d'Arrhenius, l'energie d'activation change brusquement pour x = xc s Cette transition indique une profonde modification de structure correspondant au passage d'une zone polymerique a forte association vers une zone fortement dissociee. Les compositions correspondant a la zone fortement associee a haute viscosite sont aussi celles qui permettent d'obtenir des verres homogenes par refroidissement lent du liquide.
- Published
- 1982
- Full Text
- View/download PDF