The effect of addition of gallium on the thermal stability and crystallization kinetic parameters of GaxSe100−x glass system

摘要: Abstract Differential scanning calorimetry (DSC) technique was used to study the kinetics of amorphous crystalline transformation for Ga x Se 100− glass system ( =0, 2.5 and 5 at%). The kinetic parameters under non-isothermal conditions are analyzed by model-free model-fitting models at different constant heating rates (5–50 K/min). A strong rate dependence effective activation energy crystallization observed. analysis present data shows that is not but varies with degree temperature as well. mechanisms examined using local Avrami exponents indicate one mechanism (volume nucleation one-dimensional growth) responsible process 5–50 K/min two two- working simultaneously during amorphous–crystalline 97.5 5 95 glasses reaction model may describe all compositions Avrami–Erofeev g α ) = [−ln(1 −α )] 1/ n =2 glass. While glasses, values equal 3 2 5–20 35–50 K/min, respectively. good agreement between experimental reconstructed – T curves has been achieved. from phase in demonstrates complex multi-step involving several processes.