Heating rate and composition dependence of the glass transition temperature of a ternary chalcogenide glass

Differential scanning calorimetry measurements were made on the Se70Te30-xCdx system with values of x of 2, 4, 6, 8 and 10 and heating rates of 5, 10, 15 and 20 K/min. Variation of glass transition temperature with heating rate shows a power law behaviour. The glass transition temperature decreases...

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Bibliographic Details
Published in:Journal of materials science letters 1994-01, Vol.13 (2), p.77-79
Main Authors: JOSHI, S. R, ARUN PRATAP, SAXENA, N. S, SEKSENA, M. P
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Glass transitions
Physics
Specific phase transitions
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Summary:Differential scanning calorimetry measurements were made on the Se70Te30-xCdx system with values of x of 2, 4, 6, 8 and 10 and heating rates of 5, 10, 15 and 20 K/min. Variation of glass transition temperature with heating rate shows a power law behaviour. The glass transition temperature decreases linearly with increasing cadmium concentrations which may be explained in terms of the structural change due to introduction of the cadmium atoms. Attempts have been made to model theoretically the results obtained using the concepts of change in relaxation time with heating rate and structured changes by mixing impurity atom. 17 refs.
ISSN:0261-8028
1573-4811
DOI:10.1007/BF00416803