Pre-exponential factor for non-isothermal crystallization of glassy Se_85−xTe₁₅Sb_x (0 ≤x≤ 10) alloys

Abstract

We report observations of the Meyer–Neldel rule for the non-isothermal crystallization of glassy Se_{85− x} Te₁₅Sb _x (x  = 0, 2, 4, 6, 8, 10) alloys. We found a strong co-relation between the pre-exponential factor K ₀ of the rate constant K(T) for crystallization and the activation energy of crystallization E _c. This indicates the presence of a compensation effect for the non-isothermal crystallization process in this glassy system. The composition dependence of the crystallization temperature T _c and the activation energy for crystallization E _c is discussed.

Keywords:

• chalcogenide glasses
• differential scanning calorimetry
• activation energy of crystallization

Acknowledgement

KS thanks the Council of Scientific and Industrial Research (CSIR), New Delhi, India for financial support.