Title of article :
Variation of the activation energy of the glass transition in amorphous Se thin film: Isoconversional analysis
Author/Authors :
A.A Abu-Sehly، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2010
Abstract :
The activation energy (E) of the glass transition and the heating-rate dependence of the glass transition temperature (Tg) of amorphous Se thin film were determined using differential scanning calorimetry (DSC) technique. Non-isothermal measurements were performed at different heating rates (12–40 K/min). Variation of the activation energy was confirmed by the application of five isoconversional methods. These methods showed that the glass transition activation energy is not constant but varies with the degree of conversion (α) and hence with temperature (T). The observed temperature dependence of the activation energy is consistent with the free volume model of the glass transition.
Keywords :
DSC , Glass transition , Amorphous thin film , Activation energy , Isoconversional methods
Journal title :
Thermochimica Acta
Journal title :
Thermochimica Acta