摘要
采用均相沉淀和燃烧合成相结合的方法合成了单分散球形核壳结构SiO2/CaMoO4:Eu3+,Li+荧光粉。用X射线衍射仪、扫描电子显微镜、透射电子显微镜和荧光光谱对样品的物相、结构、显微形貌和发光性能进行了表征。结果表明:产品物相由四方晶系CaMoO4和非晶态SiO2组成;CaMoO4:Eu3+,Li+荧光粉微粒在球形SiO2表面结晶良好,所形成的核壳结构微球粒径均匀;该荧光粉能在近紫外光(395nm)激发下,发出波长为617nm的红光。
The spherical core-shell structured SiO2/CaMoO4:Eu3+,Li+ phosphors were prepared by a combined approach of homogeneous precipitation and combustion synthesis. The structure, morphology and luminescence properties of the SiO2/CaMoO4:Eu^3+,Li^+ phosphors were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy and photoluminescence, respectively. The results show that the products are composed of tetragonal phase CaMoO4 and amorphous SiO2, the CaMoO4:Eu3+,Li+ particles are well-crystallized on the SiO2 spheres, and the obtained microspheres with the uniform size distribution have a core-shell structure. The SiO2/CaMoO4:Eu^3+ microspheres exhibited an intensive red emission of 617 nm under near ultraviolet (395 nm) excitation.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2013年第5期701-704,共4页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50962003
51102053)资助项目
关键词
二氧化硅微球
钼酸钙荧光粉
均相沉淀
燃烧合成
单分散
silica microsphere
calcium molybdate phosphors
homogeneous precipitation
combustion synthesis
monodisperse