| 1 | Synthesis and characterization of lithium niobium borate glasses containing neodymium显示文摘A series of(90–x)Li_2B_4O_7-10Nb_2O_5-xNd_2O_3 glass samples(x=0, 5 mol.%, 10 mol.%, 15 mol.%, 20 mol.% and 25 mol.%) were synthesized using melt quenching technique. X-ray diffraction(XRD), differential thermal analyzer(DTA), Fourier transformed infrared(FTIR), ultraviolet-visible-near-infrared(UV-Vis-NIR) spectrometer and photoluminescence(PL) spectroscopic characterizations were made to examine the influence of Nd3+ concentration on the physical, structural and optical properties. Various physical properties such as glasses density, molar volume, thermal stability, ion concentration, polar on radius, inter-nuclear distance, field strength, cut-off wavelength, energy band gap and Urbach energy were calculated. The samples were amorphous in nature and confirmed from XRD pattern. The FTIR spectra revealed the presence of BO_3 and BO_4 functional groups. UV-Vis-NIR spectra exhibited nine prominent bands centered at 353, 430, 475, 524, 583, 681, 745, 803, 875 nm corresponding to the transitions from the ground state to ~4D_(3/2), ~2P_(1/2), ~2G_(9/2), ~4G_(7/2), ~4G_(5/2), ~4F_(9/2), ~4F_(7/2), ~4F_(5/2), ~4F_(3/2) excited states, respectively. Moreover, the emission spectra at 355 nm excitation displayed three peaks centered at 903 nm(~4F_(3/2)→~4I_(9/2)), 1059 nm(~4F_(3/2)→~4I_(11/2)) and 1333 nm(~4F_(3/2)→~4I_(13/2)), respectively. Fluorescence lifetime was recorded between 53.69 to 28.43 μs. It was found that varying concentration of Nd^(3+) ions strongly affected the physical, structural and optical properties of the glass samples. | W.H.A.Kamaruddin M.S.Rohani M.R.Sahar LIU Hong SANG Yuanhua | 2016 | Journal of Rare Earths2016，34，12： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员