EFFECT OF CdO ON PHYSICAL AND OPTICAL PROPERTIES OF BINARY PHOSPHATE GLASSES

Abstract

Binary cadmium phosphate glasses were synthesized by fusing CdO and P₂O₅ with composition x% CdO-(100-x) % P₂O_5, where x lies in 30-60 mole% range. In this exercise the physical and optical properties of these glasses were studied, which are reported as mass density r, oxygen packing density, molar volume, modulus of rigidity h, coefficient of linear expansion a, transition temperature T_g, softening temperature T_s, refractive index n and optical band gap E_opt. The mass density, oxygen packing density, refractive index and band tailing decrease with increasing concentration of CdO up to 40 mole% while molar volume and optical band gap increase in this range. In these glasses modulus of rigidity, transition temperature, softening temperature, refractive index and band tailing show an increasing trend with increasing concentration of cadmium oxide from 40 to 60 mole%, whereas, in this composition range molar volume, coefficient of linear expansion and optical band gap indicate a decreasing behavior with increasing concentration of cadmium oxide. It show that the results of cadmium phosphate glass system are divided into compositional regions, i.e. in first region CdO interstices in the glass network and do structural modification, where in second region it dominates its intermediate behavior and become the part of the glass structure