| 초록 |
Chalcogenide glasses, primarily composed of chalcogen elements (S, Se, Te), have been interesting objects for studying in optical system due to their unique properties like good transmittance in infrared region, high refractive index and non-linearity. Also, it has advantage for manufacturing lens because of its moldable property. And the utilization of chalcogenide glasses is increasing, so the study of thermal of thermo-mechanical properties is needed. In this study, some physical properties of Ge-Sb-Se chalcogenide glasses were investigated. The chalcogenide glasses were synthesized by melt-quenching method. Synthesized samples were confirmed amorphous phase using X-Ray Diffraction (XRD). And next, averaged transmittance of un-coated glasses measured by FT-IR was about 62% in 8~12μm. This means the glasses maded by this work have good transmittance enough to be used for infrared optics. Thermal properties like characteristic temperature, for example, glass transition temperature(Tg), crystallization onset temperature(Tc), were measured by Differential Scanning Calorimetry (DSC). From those results, we discussed about properties with variation of composition in aspects of bonding structure and bonding energy. And also, study for activation energies at regions of glass transition and crystallization were carried by Kissinger’s equation and Ozawa’s equation. As one of the results, we confirmed that glass transition temperature has increased with increase of averaged bonding energy. |
