| Autor: |
Shakra, A. M., Fadel, M., Kalila, A. E. |
| Zdroj: |
Indian Journal of Physics; Apr2021, Vol. 95 Issue 4, p595-606, 12p |
| Abstrakt: |
The effect of doping glassy Se98Te2 alloy with Cd and Zn impurities on the thermally crystallization behavior is investigated using differential thermal analysis (DTA) at different heating rates. In this study, the glass transition activation energy (Eg), the crystallization activation energy (Ec), Avrami exponent (n), and the frequency factor (ko) are calculated to understand the mechanism of crystal growth using various theoretical models. All these models depend on the characteristic temperatures obtained from the DTA curves of the investigated samples. The obtained values of n indicate that nucleation process occurs at two-dimensional growth for both Se98Te2 and Se96Te2Zn2 while for Se96Te2Cd2 the nucleation process occurs at three-dimensional growth. Differential thermal stability parameters are calculated for the studied system and found to decrease in the sequence (SeTe) > (SeTeZn) > (SeTeCd). The effect of Cd and Zn on different kinetic parameters of the investigated glassy Se98Te2 alloy is also studied. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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