Non-isothermal crystallization kinetics study on new amorphous Ga20Sb5S75 and Ga20Sb40S40 chalcogenide glasses

Abstract Bulk glasses of the system Ga 20 Sb x S 80− x ( x = 5 and 40) were prepared for the first time by the known melt quenching technique. Non-isothermal differential scanning calorimetric (DSC) measurements of as-quenched Ga 20 Sb x S 80− x ( x = 5 and 40) chalcogenide glasses reveal that the characteristic temperatures e.g. the glass transition temperature ( T g ), the temperature corresponding to the maximum crystallization rate ( T p ) recorded in the temperature range 400–650 K for x = 5 and 480–660 K for x = 40 are strongly dependent on heating rate and Sb content. Upon heating, these glasses show a single glass transition temperature ( T g ) and double crystallization temperatures ( T p1 and T p2 ) for x = 5 which overlapped and appear as a single crystallization peak ( T p ) for x = 40. The activation energies of crystallization E c were evaluated by three different methods. The crystallization data were examined in terms of recent analysis developed for non-isothermal conditions. The crystalline phases resulting from (DSC) have been identified using X-ray diffraction.