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Influence of MnO Doped CuO Containing Sodium Zinc Phosphate Glass Matrix on Polaron Radius and Mean Spacing
Y.H. Elbashar and D.A. Rayan

A glass matrix with a chemical composition 40P2O5-38ZnO-1CuO-(21-x)Na2O-xMnO (where, x = 1, 2, 3, 4, and 5 mol%) was prepared using the conventional melt quenching technique. XRD analysis confirmed the non-crystalline nature of the prepared samples. The density and molar volume as a function of MnO concentration were determined and calculated respectively. The optical spectroscopic studies of the prepared samples were carried out over (190-2500 nm) spectral range. The glass samples has a UV cutoff wavelength and was shifted from 308 nm to 352 nm by increasing content of MnO which is very useful in the optical technology such as ultraviolet preventing applications. The optical band gap energy was decreased by increasing content of MnO. The decrease in optical band gap was proportional to the progressive increase in non-bridging oxygens (NBOs) concentration, and with the MnO increment. The refractive index was found to be enhanced with the increasing of MnO. However, the optical polarizability was found to be correlated to the chemical composition of the glass.

Keywords: Phosphate glass, Manganese, bandpass filter, Transition metals, Refractive index