STRUCTURE AND OPTICAL STUDY OF VANADIUM TELLURITE GLASSES CONTAINING POTASSIUM OXIDE

Vanadium Tellurite Glasses samples were successfully fabricated by TeO2, V2O5 and K2CO3 precursor. TeO2-V2O5 glasses were melted at 750 oC to determine the optical and structural study. The optical absorption spectra of glassy have been recorded in the wavelength range 300-900 nm by UV-Visible spectrophotometer. In addition the temperature glass transition (Tg,) of glasses has been determined by Differential Scanning Calorimetry (DSC), con?rming the amorphous nature of samples. The amorphous phase was characterized by X-ray diffraction analysis. The SEM results showed that the particle size of the samples was decreased with increasing annealing temperature from 3.4 µm to 117 nm. The optical absorption spectra showed that there is not sharply defined in the glass samples, in accord with their amorphous nature. DSC data showed that Tg shifts to higher temperatures with increasing heating rate.