【摘要】 采用水热辅助固相法，以Al（NO₃）₃·9H₂O和Mg（NO₃）₂·6H₂O为原料，尿素为沉淀剂，制备了Tb³⁺、Eu³⁺共掺杂镁铝尖晶石荧光粉。用X射线衍射、扫描电子显微镜对所得产物的相结构和形貌予以表征，结合荧光激发、发射光谱和CIE色度图分析了荧光粉的光致发光性能。结果表明：在一定浓度范围内，掺杂Tb³⁺和Eu³⁺离子后基质MgAl₂O₄的晶体结构并未发生改变，而当引入沉淀剂后，获得了具有良好分散性的棒状颗粒，且Tb³⁺与Eu³⁺间的浓度变化对样品形貌的影响甚微。在此基础上，以377 nm近紫外光作为激发光源实现了可见光区由粉至红的多色可调谐发射。更多还原

【Abstract】 By using Al（NO₃）₃·9H₂O and Mg（NO₃）₂·6H₂O as raw materials, urea as precipitant, the Tb³⁺, Eu³⁺ single-doped and co-doped magnesium aluminate spinel powders were synthesized by hydrothermal assisted solid phase method. The structure and morphology of the prepared rare earth ions doped MgAl₂O₄ phase were investigated by X-ray diffraction（XRD） and scanning electron microscopy（SEM）. Furthermore, the photoluminescence properties of the phosphors were analyzed by fluorescence spectrum and CIE chromaticity diagram. The results show that the doping of a small amount of Tb³⁺/Eu³⁺ does not change the crystal structure of the MgAl₂O₄. The rod-like magnesia-alumina spinel powder with good dispersion can be obtained by introducing precipitant urea, and the change of Tb³⁺/Eu³⁺ concentration has little effect on the morphology of the sample. On this basis, a multi-color tunable emission from pink to red light in the visible light region is achieved using 377 nm near-ultraviolet light as the excitation light source.更多还原