Phase transformation kinetics of Ge₂₃Se₆₇Sb ₁₀ glass

Using differential scanning calorimetry (DSC) technique, crystallization kinetics of the Ge₂₃Se₆₇Sb₁₀ glass upon isochronal annealing has been studied, on the basis of an analytical phase transformation model. Kinetic analysis in terms of some recipes shows that the isochronal crystallization is governed by continuous nucleation with increasing nucleation rate upon transformation, three dimensional interface-controlled growth and impingement due to anisotropic growth. This is compatible with the fit using the analytical phase transformation model, i.e. the effective activation energy Q has been determined as 152.6 kJ/mol and the growth exponent n as 4.3.