Spectral and Luminescence Properties of Manganese Doped Sodium Lead Alumino Borosilicate Glass System

Abstract

Na2O-PbO-Al2O3-B2O3-SiO2 glasses mixed with different concentrations of MnO (ranging from 0.3 to 0.9 mol %) was prepared by melt quenching technique. The samples were characterized by X-ray diffraction technique, Optical absorption and Photo luminescence technique. A prepared glass sample is confirmed by X-ray diffraction spectra. The optical absorption spectra of these glasses exhibited a predominant broad band peak at 21,052 cm 1 (475 nm) is identified due to 6 A1g (S)  4 T1g (G) octahedral transition of Mn 2+ ion. From the spectral analysis the optical band gap (Eopt) and Urbach energy (ΔE) are evaluated. The emission spectra of Mn 2+ doped titled glasses have shown single and broad emission band at about 600 nm assigned to electronic transition 4 T1g (G)  6 A1g (S) displaying red emission upon excitation at 413 nm. Various principle physical properties were also evaluated .

A Sustainable Solution to Obtain P-K-Mn Glass Fertilizers from Cheap and Readily Available Wastes

“…The color changed from colorless for the first two samples to different shades of pink characteristic to the Mn 3+ ion. The presence of this ion in the glass matrix is confirmed by the broad asymmetric band centered at about 480 nm [41,42] on the UV-VIS spectra presented in Figure 2. The double peak around 415 nm corresponds to the Mn 2+ [43,44] ion that appears in glass according to the redox reaction: Mn 2+ ↔ Mn 3+ + e − .…”