Kinetics of Phase Transformations and Thermal Stability of GexSe70Sb30-x x = 5, 10, 15, 20 Chalcogenide GlassesReport as inadecuate




Kinetics of Phase Transformations and Thermal Stability of GexSe70Sb30-x x = 5, 10, 15, 20 Chalcogenide Glasses - Download this document for free, or read online. Document in PDF available to download.

Kinetic studies oftwo-phase transformations i.e. glasstransition and crystallization for GexSe70Sb30-x x = 5, 10, 15, 20 glasses have been performed usingdifferential scanning calorimetry DSC at different heating rates under non-isothermalcondition. The glass transition and crystallization regions have been investigatedin terms of their characteristic temperatures i.e. glass transition temperature Tg and crystallization temperature Tc and activation energy. The activation energies ofglass transition and crystallization have been calculated by employing peak shiftmethod of Kissinger and isoconversional methods. Activation energies have beenfound to be dependent on the composition. The thermal stabili- ty isdetermined from the temperature difference ΔT = Tc — Tg where Tc and Tg are the onset crystallization and glass transitiontemperature respectively. It has been found that Ge15Se70Sb15 glass is thermally more stable as compared to the other members of the series.

KEYWORDS

Glass Transition Region; Differential Scanning Calorimetry; Activation Energy; Thermal Stability

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A. Kaswan, V. Kumari, D. Patidar, N. S. Saxena and K. Sharma -Kinetics of Phase Transformations and Thermal Stability of GexSe70Sb30-x x = 5, 10, 15, 20 Chalcogenide Glasses,- New Journal of Glass and Ceramics, Vol. 3 No. 4, 2013, pp. 99-103. doi: 10.4236-njgc.2013.34016.





Author: Anusaiya Kaswan, Vandana Kumari, Dinesh Patidar, Narendra S. Saxena, Kananbala Sharma

Source: http://www.scirp.org/



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