Study on some physical and optical properties of alkaline alumino borate glasses doped with Mn2+ ions

Mohamad Raheem Ahmed¹ , Md Shareefuddin²

Section:Research Paper, Product Type: Isroset-Journal
Vol.6 , Issue.6 , pp.26-33, Dec-2018

CrossRef-DOI:   https://doi.org/10.26438/ijsrpas/v6i6.2633

Online published on Dec 31, 2018

Copyright © Mohamad Raheem Ahmed, Md Shareefuddin . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Alkaline alumino borate glasses have composition (30-x) MO-xAl2O3-69.5B2O3-0.5MnO2 (0 ≤ x≤ 15 mol %) ( where MO=SrO, BaO). These glasses were prepared by melt quenching process. For these glasses, density was calculated using Archimedes principle. Variation in the density and molar volume was explained on the base of the bond length of Al-O and B-O. The values of polaron radius increases and field strength (F) decreases are attributed to the open structure. From optical absorption spectra, it was observed that broad absorption peak at 470 nm is due to the transition of Mn3+ ions from 5Eg → 5T2g in the octahedral site. Optical band gap (Eg) and Urbach energy (ΔE) were calculated. It results in the creation of non-bridging oxygens (NBO’s) in the present glass system

Key-Words / Index Term :
Alkaline alumino glasses, Borate glasses, Physical properties, Optical properties

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