Optical Spectroscopic Analysis of Neodymium Oxide Doped Phosphate Glass Matrix for Solar Energy Applications
Yahia. H. Elbashar, D. A. Rayan, Hedra Emad R. Saleh and Roshdy A. Abdel Rassoul
The conventional glass melt quenching method was used to prepare the samples of the phosphate glass system of chemical composition 40P2O5-35ZnO-4MgO-(21-x) Na2O-xNd2O; where [x = 0, 0.2, 0.4, 0.6, 0.8 mol %]. The nature of glass that prepared was measured by x-ray diffraction which shows no crystal content. Archimedes method has been employed to measure the density of the prepared glass samples, and hence, the molar volume was calculated. The effect of Neodymium content on density and molar volume was investigated. It was found that the density of the glass decreases by increasing the Neodymium content, and the molar volume VM follows the same trend. Optical absorption and transmission spectra were measured in the range from 190 to 1100 nm, and two broad bands are observed in both UV and IR regions. Analysis of the obtained results was used for the determination of the optical bandgap energy and different physical properties, such as permittivity, polarizability, refractive index and dielectric constant.
Keywords: solar glass conversion applications, optical spectroscopic analysis, phosphate glass, neodymium doped glass