Optical and Ultrasonic Properties of Chromium ...

Sodium zinc Phosphate glasses (NZP) containing different concentrations of chromium oxide have been synthesized by melt quenching technique. Characterization of these glassy materials was carried out by X-ray diffraction, FT-IR spectroscopy. Transmission, absorption and fluorescence as optical properties were also investigated. The optical band gaps (Eo) and energy tail (ΔE) were determined and it was found that, the optical band gap increased with increasing of Cr2O3 Keywords- Phosphate Glass; Transition Metals; Optical Properties; Ultrasonic concentration and vice versa for energy tail. The ultrasonic compression and shear wave velocity measurements were made by pulse-echo technique at a frequency of 5 MHz. The elastic constants of the studied glasses were calculated. The density, molar volume, the ultrasonic wave velocities (longitudinal and shear), the elastic moduli, Poisson's ratio, Debye temperature, mean ultrasonic velocity and the ultrasonic attenuation are found to be sensitive to the glass composition. The compositional dependence of the glass hardness was also examined.