Abstract
Bismuth based glasses containing ZnO, B 2O 3 and Li 2O are investigated by different physical, spectroscopic and transport techniques. Raman and IR studies reveal that these glasses are built up of [BiO 3] and [BiO 6] units. Zinc in tetrahedral form is also observed. Glass transition temperature varied nonlinearly with the composition. Also the variation in conductivity with composition is very small and non-linear. The nonlinear behaviour in these properties is attributed to mixed former effect. Molar polarizability is also estimated from optical and dielectric properties. The polarizability values show dependence on Bi 2O 3 content and varied nonlinearly.
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