Ekmekçi Mete Kaan, İlhan Mustafa, Ege Arzu, Ayvacıklı Mehmet
Department of Chemistry, Marmara University, Kadıkoy, 34777, Istanbul, Turkey.
Department of Materials Science and Engineering, Marmara University, Kadıkoy, 34777, Istanbul, Turkey.
J Fluoresc. 2017 May;27(3):973-979. doi: 10.1007/s10895-017-2032-3. Epub 2017 Jan 13.
Undoped and different concentration Nd doped SrNbO 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 SrNbO phases found to be orthorhombic columbite single phase for undoped, 0.5 and 3 mol% Nd doping concentrations. Phase composition of the powders was examined by SEM-EDS analyses. Radioluminescence properties of Nd 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 with F → I transition in the Nd 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 Nd doping concentration. All the measurements were taken under the room temperature.
采用熔盐法，以硝酸锶和五氧化二铌的混合物以及氯化钠 - 氯化钾盐混合物为助熔剂，在相对较低的煅烧温度下合成了具有铌铁矿结构的未掺杂及不同浓度钕掺杂的SrNbO粉末。X射线衍射分析结果表明，对于未掺杂、0.5和3 mol%钕掺杂浓度的样品，SrNbO相为正交铌铁矿单相。通过扫描电子显微镜 - 能谱分析（SEM - EDS）研究了粉末的相组成。研究了钕掺杂样品从紫外到近红外光谱区域的辐射发光特性。发射强度随着掺杂浓度增加到3 mol%而增强，随后由于浓度猝灭效应而降低。在300至1100 nm之间，钕离子中与F→I跃迁相关的880 nm附近有一个尖锐的发射峰。在400至650 nm处观察到宽发射带强度，其峰值强度随着钕掺杂浓度的增加而增加。所有测量均在室温下进行。
