The structure, spectra and properties of Dy2O3 modified diamagentic lead-bismuth-germanium glasses

Dy2O3 is potential and attractive as scintillator, mid infrared laser and Faraday rotation materials in high energy physics, general radiation and magneto optical sensing systems. In this study, Dy3+ doped diamagnetic glasses with compositions of 10GeO(2) - 30PbO - 50Bi(2)O(3) - (10-x)B2O3 -xDy(2)O(3) (x = 0, 0.5, 1, 2, 3, 5 M %) were fabricated by a melt quenching technique. The modification of Dy3+ on glass forming, structure, UV-Vis, FT-IR, Raman and photoluminescence spectra and properties were investigated through XRD, Raman spectra, DSC, Vicker's hardness and Verdet constant measurements etc. Melt with Dy2O3 content beyond 5% prefer to crystallize, not to form glassy matrix. The UV visible absorption spectra showed three intense bands at 483 nm, 575 nm and 661 nm due to F-4(9/2) -> 6H(15/2) (blue), 4F(9/2) -> 6H(13/2) (yellow) and 4F(9/2) -> 6H(11/2) (red) transitions, respectively. Judd-Ofelt paramaters have been calculated to verify network connectivity of Dy2O3 doped glasses. FT-IR and Raman spectrum depicted the presence of PbO4, BiO3, GeO6, BO3 frame groups and Dy-O bonds from cubit Dy2O3. Glass doped with 1%Dy2O3 exhibited promising thermal stability (97 degrees C), microhardness (480 HV) and magneto-optical activity (0.1864 min/G.cm@532 nm) due to the high optical dispersion, high ion polarizability of Dy3+ ions