Abstract
Abstract X-ray diffraction (XRD), differential scanning calorimeter (DSC), density ( d ) and dc conductivity ( σ ) of the glasses in Fe 2 O 3 –CaO–P 2 O 5 system were reported. The dc conductivity in the temperature range 303–453 K was measured. The overall features of these XRD curves confirm the amorphous nature of the present samples. The density of glasses increases from 2.750 to 2.892 g/cm 3 with increasing Fe 2 O 3 content as a result of a strengthening of cross-linking within glass network. The glass temperature values ( T g ) of the present glasses were larger than those of tellurite glasses. This indicates a higher thermal stability of the glass in the present system. The glasses had conductivities ranging from 10 −9 to 10 −5 Sm −1 at temperatures from 303 to 453 K. Electrical conduction of the glasses was confirmed to be due to non-adiabatic small polaron hopping and the conduction was primarily determined by hopping carrier mobility.
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