Chalcogenide glasses based on the Ge-Sb-Se system have drawn a great deal of attention because of their use in preparing optical lenses and fibers transparent in the range of 3-12 μm. In this study, amorphous Ge-Sb-Se chalcogenide for an application in infrared optical product design and manufacture was prepared by a standard melt-quenching technique. Results of the structural analysis and differential scanning calorimetry of high purity Ge-Sb-Se chalcogenide glasses are reported during various annealing processes. An anomaly of crystallization was observed in the DSC result of the chalcogenide glass and the activation energy of Ge18Sb22Se60 calculated by the Ozawa method was approximately 3.2 eV.

Keywords: Chalcogenide glass, Ge-Sb-Se, Amorphous, Crystallization, Activation energy, Infrared lens.