CRYSTALLIZATION AND SPECIFIC-HEAT STUDIES OF SE100-XSBX (X=0, 2 AND 4) GLASS

Bulk glasses of compositions Se100-xSbx (x = 0, 2 and 4) are prepared by melt quenching technique. Differential scanning calorimetry (DSC) i s employed to study the crystallization mechanism as well as specific heat of these glasses. Samples are subjected to thermal scanning in th e DSC at various heating rates. All the compositions have shown well d efined exothermic peaks of crystallization. The crystallization data a re examined in terms of modified Kisinger's equation for the activatio n energy of crystallization. Also the results were analysed using the method suggested specifically for nonisothermal crystallization by Mat usita et al. and the activation energy for crystallization and the dim ensionality of crystal growth are indicated for all the compositions. It has also been found that the thermal stability of the system is enh anced by the alloying of Se with small atomic percentages of antimony. Specific heat, C-p, of all the compositions were also evaluated and d iscussed. (C) 1997 Elsevier Science Ltd.