Abstract
Undoped and different concentration Nd3+ doped SrNb2O6 powders 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 SrNb2O6 phases found to be orthorhombic columbite single phase for undoped, 0.5 and 3mol% 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 3mol%, and then decreased due to concentration quenching effect. There is a sharp emission peak around 880nm associated with 4F5/2→4I9/2 transition in the Nd3+ ion between 300 and 1100nm. The broad emission band intensity was observed from 400 to 650nm where the peak intensities increased by increasing Nd3+ doping concentration. All the measurements were taken under the room temperature.
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