CALORIMETRIC STUDY ON TELLURITE GLASSES

The differential scanning calorimetry (DSC) at different heating rates was used to gain some insight into the thermal stability and calorime tric behaviour of the three-component tellurite silver vanadate glasse s of the (TeO2)(50)-(V2O5)(50-x)-(Ag2O)(x), where x = 20, 22.5, 25, 27 .5 wt%. The glass transformation temperature T-g and glass crystalliza tion temperature T-c were recorded. From the variation of the heating rate the glass transition activation energy and the crystallization ac tivation energy were calculated by different methods.