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Optical band gap, glass transition temperature and structural studies of (100−2x)TeO2–xAg2O–xWO3 glass system

“…Hence, from DSC results, it is concluded that the strength of the present glass system decreases with WO 3 -Ag 2 O content. The T g of present glasses are lower than T g of the glasses in TeO 2 -WO 3 system [29] and higher than T g of the glasses in TeO 2 -Ag 2 O system [30], TeO 2 -Ag 2 O-V 2 O 5 system [31] and comparable to T g of those found in [17].…”

IR absorption spectra of lithium and silver vanadium–tellurite based glasses

“…Simultaneously, the band centered at 653 cm À1 moves to 622 cm À1 and becomes sharper, indicating the continuous increase in the proportion of TeO 4 groups present in the structure of the glasses [6,7].…”

“…IR spectra for 0.7Ag2 O 0.3[(1 À Y)0.5V 2 O 5 -Y0.5MoO 3 ] AE 2TeO 2 systems.modifiers. The inverse effect was observed by Dimitriev et al when pure TeO 2 samples were mixed with increasing amounts of the former oxides[6].…”

“…For several decades the structures and properties of crystalline forms of TeO 2 and binary and ternary tellurite glasses have been investigated using the IR and Raman spectroscopic techniques as central or complementary tools (see [6,7]-and references cited therein). For these glasses, the complex spectra are dominated by the strong bands produced by vibrations of the TeO 4 or TeO 3 basic structural units and by the polyhedra of several modifiers like MoO 3 and V 2 O 5 [6,8,9].…”

“…For these glasses, the complex spectra are dominated by the strong bands produced by vibrations of the TeO 4 or TeO 3 basic structural units and by the polyhedra of several modifiers like MoO 3 and V 2 O 5 [6,8,9]. In Figs.…”