Viscosity of (GeSe 2) x (Sb 2Se 3) 1− x undercooled melts

Viscosity of (GeSe 2) x (Sb 2Se 3) 1− x undercooled melts ( x = 0.4–0.8) was measured using parallel-plate method and penetration method. By using these two techniques viscosity of the whole measurable region of undercooled melt and of the part of glass region can be measured. In this relatively bro...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2007-09, Vol.353 (29), p.2803-2806
Main Authors: KOSTAL, Petr, MALEK, Jiri
Format: Article
Language:English
Subjects:
Calorimetry
Chalcogenides
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Fragility
Glass transition
Glass transitions
Physics
Specific phase transitions
Viscosity
Viscosity and relaxation
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Summary:Viscosity of (GeSe 2) x (Sb 2Se 3) 1− x undercooled melts ( x = 0.4–0.8) was measured using parallel-plate method and penetration method. By using these two techniques viscosity of the whole measurable region of undercooled melt and of the part of glass region can be measured. In this relatively broad viscosity interval (seven orders of magnitude) all measured samples show Newtonian behavior and the dependence of their viscosity on temperature can be described by a simple Arrhenius equation. The kinetic fragilities calculated from these dependencies show similar compositional dependence as heat capacity changes at glass transition measured by DSC.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2007.06.009