2007 · 13 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ThermodynamicsPhase TransformationsThermal AnalysisChalcogenide GlassesCrystallization AnalysisCrystallization ProcessesGlass MaterialsPhase ChangePhase TransitionsActivation EnergyActivation Energy DeterminationCrystallizationCrystallization In GlassEnthalpy Of CrystallizationGlass TransitionGlass Transition TemperatureNon-isothermal Crystallization
Chalcogenide glasses based on Ge-Te-Sb are used in the technology of phase change optical memories. Non-isothermal crystallization for Ge15.5-xTe84.5Sbx (0.5 <x< 1.5) investigated by differential scanning calorimetry (DSC) shows two glass transition temperatures followed by two crystallization peaks and melting point at 385°C . The activation energy of crystallization has been calculated in the frame of three models: Matusita, Kissinger and Ozawa. The particularity of every model is analysed.