作　　者： ; ; ; ;

机构地区： 暨南大学生命科学技术学院纳米化学研究所

出　　处： 《功能材料》 2010年第2期327-330,共4页

摘　　要： 采用水热-均匀沉淀法,以尿素为沉淀剂,在聚四氟乙烯低温反应釜中160℃水热,在较低的煅烧温度下制备了亚微米级长余辉发光材料Sr0.97Al2O4∶Eu0.01,Dy0.02。XRD结果表明,在1000℃煅烧4h能得到单相的SrAl2O4∶Eu,Dy,SEM测试显示SrAl2O4∶Eu2+,Dy3+发光材料为球状形貌,粒径大小约为200～500nm,激发和发射光谱结果表明,随着煅烧温度升高,SrAl2O4∶Eu2+,Dy3+的发光强度也随之增强,其激发光谱峰值位于360nm,发射光谱峰值位于513nm,SrAl2O4∶Eu2+,Dy3+在1100℃煅烧后的余辉衰减时间比1000℃煅烧后显著提高,其热释光谱峰值在80～90℃。 Green long-lasting phosphors SrAl2O4∶Eu^2＋,Dy^3＋ were synthesized by hydrothermal-homogeneous precipitation method.X-ray diffraction,emission scanning electron microscopy,photoluminescence,as well as thermo-stimulated luminescence were utilized to characterize the long-lasting phosphors.XRD analysis indicated the obtained SrAl2O4∶Eu2＋,Dy3＋ annealed at 1000℃ for 4h were monoclinic crystal phase.With the temperature increasing,their crystallinity would also enhanced.The obtained phosphors consist of well dispersed submicron spherical particles with a narrow size distribution of 200-500nm,and these phosphor particles show blue-purple emission corresponding to 5d-4f（513nm） of Eu^2＋ under the excitation of ultraviolet（360nm）.

关 键 词： 水热 均匀沉淀法 长余辉 荧光粉

领　　域： [理学] [理学]