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Crystallization and glass transition kinetics in Se80Te20-XCdX glasses by using non-isothermal measurement

Published online by Cambridge University Press:  13 June 2007

Anis Ahmad ,
Samshad A. Khan ,
K. Sinha ,
M. Zulfequar  and
M. Husain
Anis Ahmad
Affiliation:
Department of Physics, University of Lucknow, Lucknow, U.P. 226007, India
Samshad A. Khan
Affiliation:
Department of Physics, St. Andrew's College, Gorakhpur, U.P. 273001, India
K. Sinha
Affiliation:
Department of Physics, University of Lucknow, Lucknow, U.P. 226007, India
M. Zulfequar
Affiliation:
Department of Physics, Jamia Millia Islamia, New Delhi 110025, India
M. Husain*
Affiliation:
Department of Physics, Jamia Millia Islamia, New Delhi 110025, India
*
mush_reslab@rediffmail.com
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Abstract

Crystallization processes of Se80Te20-xCdx (x = 0, 4, 8, 10 and 12) alloys at different heating rates have been studied by differential scanning calorimeter (DSC) by using non-isothermal technique. The values of glass transition temperature (Tg) and crystallization temperature (Tc) are found to be composition and heating rate dependence. From the heating rate dependence of glass transition temperature and crystallization temperature, the activation energy of crystallization (ΔEc), the activation energy for structural relaxation (ΔEt) and the order parameter (n) have been calculated. It was observed that Se80Te16 Cd4 has a minimum value of activation energy of structural relaxation (ΔEt), which indicates that this particular glass has a larger probability to jump to a state of lower configurational energy and higher stability in the glassy region.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 38 , Issue 3 , June 2007 , pp. 211 - 216
Copyright
© EDP Sciences, 2007

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