The vitrification region and the physicochemical properties of glasses based on components of AVBVICVII type
Vitrification regions have been determined for the mixed chalcoiodides of arsenic, antimony, and indium, and some physicochemical and optical properties have been examined. DTA curves have been recorded for the glasses, which reveal three effects: the first corresponds to the onset of softening at Tg, the second to recrystallization at Tr, and the third to melting at Tm. Measurements are reported for the specific resistance ρ, optical width of the forbidden band Eg, and also Tg for some compositions in the system InXI-AsXI-SbXI. Tests have been made on the effects of small deviations of the amount of iodine from stoichiometric in AsXI (X=Se, S) as regards the IR transmission spectra at different temperatures. The temperature results of the transmission spectra are discussed for various technological batches of AsXI glasses, which are due to differences in the position of the Fermi level in the pseudoband.