, Volume 27, Issue 15, pp 4208-4210

Thermally induced transformations in Ge x AsyTe100−xy glasses

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Abstract

Chalcogenide glasses with compositions Ge7.5As y Te92.5y (y=20, 40, 45, 47.5, 50, 52.5, 55) and Ge10As y Te90−y (y=15, 20, 22.5, 35, 40, 45, 50) have been prepared by the melt-quenching technique. The amorphous nature of these glasses has been confirmed by X-ray powder diffractometry. The thermal stability of these glasses has been studied using differential scanning calorimetry (DSC). The compositional dependence of the glass transition temperature,T g, the crystallization temperatures,T c1 andT c2, and the melting temperature,T m, are reported. The glass-forming tendency,K gl, and the activation energy of crystallization,E, are calculated. The activation energy decreases with increasing tellurium content for both sets of glasses.