Structural characterization of Te₉Se₇₂Ge_19-xSb_x (8<=x<=12) glass using far-infrared spectra

摘要

The chalcogenide alloy Te9Se72Ge19-xSbx (8≤x≤12) is investigated for its structure and glassy nature. The compositional variation of experimental and theoretical calculated value of glass transition temperature (Tg) has been studied and is supported by the theoretically calculated mean bond energy and cohesive energy. The bonding arrangement in the glass has been studied using far-infrared transmission spectroscopy. The results are interpreted using the chemical bond approach (CBA) and valence field force (VFF) model. All possible heteropolar bonds are observed in the material. A correlation between Tg and far IR results has also been predicted.