Structural and Spectral Analysis Host Bi2O3-B2O3-LiF and RE3+(Ho3+ or Pr3+): Bi2O3- B2O3-LiF Glasses

Bismuth borate glasses in the composition of 20Bi2O3-50B2O3-30LiF (BiBLF) have been prepared by using conventional melt quenching method. Thermal analysis (Tg-DTA) structural (XRD, FTIR and Raman), SEM micro graph and elemental (EDAX) analysis have been carried to the host glass matrix. TG-DTA profiles exhibit weight loss and glass transition temperature (Tg) at 125οC and also the glass melting temperature (Tm) at 570οC. XRD profile confirms the amorphous nature while the bands in FTIR and Raman spectra are assigned appropriately to their corresponding vibrations. Elemental analysis confirms presence of the host elements with regard to SEM micrograph shows no grains confirming amorphous nature. Absorption spectrum of Pr3+or Ho3+: BiBLF glasses have revealed a group of absorption bands assigned to their related transitions originating from 3H4 and 5I8ground state. The emission spectrum of Pr3+: BiBLF glass has revealed three emission bands at 532 nm (3P1→3H5), 617 nm (1D2 →3H4) and 647 nm (3P0→3F2) upon excitation at 470 nm. The florescence spectrum of Ho3+: BiBLF glass excited at 454 nm has displayed two emission bands at 547 nm (5S2, 5F4 → 5I8) and 660 nm (5F5 → 5I8)