Abstract

The effect of compositional changes on the physical properties of 40PbO 10Bi2O3 (50-0.1)B2O3 xFeO glass system has been investigated. The physical properties include , density ,molar volume,optical electronegativity, optical energy gap, linear refractive index, molar refraction , electronic polorizability ,third order nonlinear susceptibility , have been studied theoretically for 40PbO 10Bi2O3 (50-0.1)B2O3 xFeO glass system where (x= 0.2,0.3,0.4,0.5). An analysis of physical parameters related to these compositions was compared with theoretical predictions. It was found that by increasing FeO content, the glass matrix becomes more dense, and the optical energy gap decrease, but the refractive index increase. The electronic polarizability of oxide ion increase with increasing the optical basicity. The value of optical basicity shows that the glass materials are more basic. It is suggested that the ability of oxide ion to donate electrons to surrounding cations increases. Also, It was found that the values of third order nonlinear susceptibility increase by increasing FeO content and are found to be larger than those of the silica based glasses. The high values of nonlinear refractive index for all the studied samples are advantageous for all optical signal processing and telecommunications. Also, it was found that the values of third order nonlinear susceptibility increase with decreasing the optical energy gap and increasing the refractive index for all the studied samples. Finally, new nonlinear optical materials were suggested.