Results of differential scanning calorimetric studies on the Mg0.10As0.34Se0.56 chalcogenide glass are reported. The heating rate dependence of the glass transition temperature (Tg), the crystallization onset temperature (Tc) and the crystallization peak temperature (Tp) were studied. These parameters were utilized in the determination of the activation energy of the glass transition (Eg), the activation energy of crystallization (Ec), the Avrami exponent (n) and the frequency factor K0. Eg was determined from the variation of Tg with the heating rate β and its average value <Eg>=197±5 kJ/mol. Ec was determined using several methods; it gives the average value <Ec>=116±16 kJ/mol. The present investigation indicates that both the glass transition and the crystallization processes occur in a single stage, since the thermograms exhibit a unique value for both Tg and Tp. The crystallization mechanisms for the Mg0.10 …
Research Abstract
Research Date
Research Department
Research Journal
Physica B: Condensed Matter
Research Member
Research Vol
311
Research Year
2002
Research Pages
356-365