EFFECT OF GADOLINIUM IONS ON STRUCTURAL AND OPTICAL PROPERTIES OF ZINC BOROTELLURITE GLASSES

Abstract

Glasses with composition {[(TeO2)0.7(B2O3)0.3]0.7(ZnO)0.3}1-x (Gd2O3)x ,where x = 0.01, 0.02, 0.03, 0.04 and 0.05 mol have been fabricated by using conventional melt quenching method. The structural properties of the prepared glass were determined via X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) analysis. It was confirmed that the prepared glasses are all in amorphous nature. The FTIR analysis shows structural change from TeO3 to TeO4 and BO4 to BO3. The optical absorption was recorded at room temperature in the wavelength ranging from 200 to 1000 nm. From the absorption edge data, the value of optical band gap Eopt and the Urbach energy ΔE were evaluated and were found to be dependent on the composition of the glass.