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

• Published in: Journal of non-crystalline solids 2005-01, Vol.351 (2), p.130-135
• Main Authors: OTHMAN, A. A, AMER, H. H, OSMAN, M. A, DAHSHAN, A
• Format: Article
• Language: English
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from solid phases (including multiphase diffusion and recrystallization); Materials science; Methods of crystal growth; physics of crystal growth; Physics
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2004.09.029

Bulk glasses of the system Ga20SbxS80--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 Ga20SbxS80--x (x=5 and 40) chalcogenide glasses reveal that the characteristic temperatures e.g. the glass transition temperature (Tg), the temperature corresponding to the maximum crystallization rate (Tp) recorded in the temperature range 400--650K for x=5 and 480--660K for x=40 are strongly dependent on heating rate and Sb content. Upon heating, these glasses show a single glass transition temperature (Tg) and double crystallization temperatures (Tp1 and Tp2) for x=5 which overlapped and appear as a single crystallization peak (Tp) for x=40. The activation energies of crystallization Ec 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.