Determination of thermal parameters of glasses from the system Bix(As2S3)100−x based on DSC curves

Abstract Thermal properties of glasses from the system Bix(As2S3)100−x were studied by differential scanning calorimetry of a representative series of samples with x = 0.5, 2, 4, 6, 8, and 10 at.% Bi by determining the characteristic temperatures (Tg, Tonset, Tc, Tm) and enthalpies (Hc, Hm) of the processes taking place in the samples during their thermal treatment. Analysis of DSC recordings for the samples at the same heating rate allowed characterization of the phase transition temperature Tg as a function of the content of doping atoms in accordance with the criteria of chemical bonds formation in amorphous materials. Samples with 4 and 6 at.% Bi were thermally treated at different heating rates with the aim of determining, among the others, the parameters of their thermal stability. The assessment was done based on three different criteria. A higher tendency toward crystallization was observed with the glasses having a higher Bi content. Also, a trend of Tg shifting toward higher values, observed wit...