Izvorni znanstveni članak

Non-isothermal crystallization kinetics of Sb10Ge10Se80 chalcogenide glass

H. A. Hashem ; Physics Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
S. Abouelhassan ; Physics Department, Faculty of Science, Benha University, Benha, Egypt

Sažetak

A differential scanning calorimetry technique was used to study the crystallization kinetics of Sb10Ge10Se80 chalcogenide glass under non-isothermal conditions. The crystallization parameters such as the order parameter (n), the frequency factor (k0), the activation energy of crystallization (Ec), the activation energy of glass transition (Eg) and the activation energy of nucleation (En) were determined. The value of Ec was deduced by means of six methods and the average value was found to be equal to (76.10±1.10) kJmol−1 . The most suitable method for crystallization kinetic studies was the Augis–Bennett approximated method at different heating rates, while the method of Coats–Redfern–Sestak was the most suitable one at constant heating rate. The results have been discussed on the basis of theoretical principles.

Ključne riječi

chalcogenide glass; crystallization; DSC; glass transitions

Hrčak ID:

302179

URI

https://hrcak.srce.hr/302179

Datum izdavanja:

1.10.2006.

Podaci na drugim jezicima: hrvatski

Posjeta: 589 *