Abstract
We have prepared ternary Se80Te17Bi3 and Se80Te14Bi6 glasses using melt-quench technique and performed the non-isothermal kinetics by differential scanning calorimetry (DSC) at various heating rates (beta). X-ray diffraction and FESEM have been used to identify the transformed phases. The change in glass transition temperature (T-g) and crystallization temperature (T-c) with heating rates have been used to calculate different crystallization parameters in Se80Te20-xBix chalcogenide glasses. We found that both T-g and T-c becomes larger with increasing beta. Activation energies of glass transition (E-g) and crystallization (E-c), the crystallization enthalpy (H-c), thermal stability and glass forming ability (GFA) were determined from the dependency of T-g and T-c on heating rates. From our experimental data, the temperature difference (T-c - T-g) and H-c are largest and lowest, respectively, for Se80Te17Bi3 glass, which shows that Se80Te17Bi3 glass is more stable than Se80Te14Bi6 glass. (C) 2014 Elsevier Ltd. All rights reserved.