Abstract
The purpose of this investigation is to study the physical, structural and optical characteristics of a newly fabricated SrO2 doped lithium bismuth borate glass system. The current glass system was fabricated according to the chemical formula 50B(2)O(3) + 25Bi(2)O(3) + (25-x) Li2O + xSrO(2), utilizing the solid state- conventional method. It was noticed that The glass density increased from 4.821 to 5.952 g cm(-3) whilst the molar volume was decreasing in the range from 32.93 to 30.44 cm(3) mol(-1) with increase the SrO2 insertion from 0 (BBLSr0 glasses) to 25 (BBLSr25) respectively. The structure of the fabricated glasses was inspected utilizing X-ray diffraction method which clarified that the insertion of SrO2 didn't affect the amorphous nature of the tested samples. Furthermore, the UV-vis absorption spectrum was utilized to study the UV absorption characteristics for the fabricated glasses. The UV-vis absorption spectrum showed that the absorption and transition bands increase with insertion of the SrO2 contents. Based on the UV/Vis data, several important optical features were calculated like the energy gap (E-g), Urbach energy (E-u), oscillator energy (E-o) and energy of distribution (E-d). Increasing the SrO2 substitution ratio led to increase the optical properties where the refractive index was found to increase from 3.056 to 5.710.