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The kinetics of crystallization of Ge30-xSe70Sbx (x = 15, 20, 25) chalcogenide glasses has been investigated using dierential scanning calorimetery at dierent heating rates under non-isothermal conditions. The kinetic analysis of crystallization has been discussed using dierent theoretical approaches such as Ozawa model, Augis and Bennet model, Matusita model and Gao-Wang model. It is evident from this study that the activation energy of crystallization Ec is composition dependent. The activation energy decreases with increasing Sb content due to the increasing of rate of crystallization. The minimum value of the frequency factor Ko, which is dened as the number of attempts made by the nuclei per second to overcome the energy barrier, conrms the fact that glass is more stable. It has been found that Ge15Se70Sb15 glass is more stable compared to the other compositions

Kinetics of crystallization of Ge30-xSe70Sbx (x=15, 20, 25) chalcogenide glasses