title: Microstructural and Radioluminescence Characteristics of Nd3+Doped Columbite-Type SrNb2O6Phosphor.
abstract: Undoped and different concentration Nd3+doped SrNb2O6powders with columbite structure were synthesized by molten salt process using a mixture of strontium nitrate and niobium (V) oxide and NaCl-KCl salt mixture as a flux under relatively low calcining temperature. X-ray diffraction analysis results indicated that SrNb2O6phases found to be orthorhombic columbite single phase for undoped, 0.5 and 3 mol% Nd3+doping concentrations. Phase composition of the powders was examined by SEM-EDS analyses. Radioluminescence properties of Nd3+doped samples from UV to near-IR spectral region were studied. The emissions increased with the doping concentration of up to 3 mol%, and then decreased due to concentration quenching effect. There is a sharp emission peak around 880 nm associated with4F5/2→4I9/2transition in the Nd3+ion between 300 and 1100 nm. The broad emission band intensity was observed from 400 to 650 nm where the peak intensities increased by increasing Nd3+doping concentration. All the measurements were taken under the room temperature.
authors.affiliation: Department of Chemistry, Marmara University, Kadıkoy, 34777, Istanbul, Turkey. mekmekci@marmara.edu.tr.
authors.forename: Mete Kaan
authors.initials: MK
authors.lastname: Ekmekçi
authors.affiliation: Department of Materials Science and Engineering, Marmara University, Kadıkoy, 34777, Istanbul, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: İlhan
authors.affiliation: Department of Physics, Celal Bayar University, 45140, Manisa, Turkey.
authors.forename: Arzu
authors.initials: A
authors.lastname: Ege
authors.affiliation: Department of Physics, Celal Bayar University, 45140, Manisa, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Ayvacıklı
keywords: Molten salt synthesis; Radioluminescence; Strontium metaniobate