STRUCTURAL STUDIES ON GALLIUM–BISMUTHATE GLASSES CONTAINING IRON

Abstract

Glasses belonging to x Fe2O3·(80-x) Bi2O3·20 Ga2O3system (0≤x≤20 mol %) were prepared using the melt quenching technique. Local order changes were investigated as a function of iron content using electron paramagnetic resonance and infrared spectroscopy results. The glass network mainly consist of [ BiO6] octahedral units. Iron ions enter the glass network by breaking up Bi - O - Bi bonds. Gallium ions also behave as glass network modifier.