SrAl_2O_4∶Eu^(2+),Dy^(3+)荧光粉的合成及表征

Synthesis and characterization of SrAl_2O_4∶Eu^(2+),Dy^(3+) fluorescent powder

为了提高SrAl_2O_4∶Eu^(2+),Dy^(3+)荧光材料的发光强度和余辉时间,采用高温固相法合成了SrAl_2O_4∶Eu^(2+),Dy^(3+)荧光粉.利用X射线衍射仪、扫描电子显微镜和荧光光谱仪对产物的化学成份、结构、微观形貌和发光特性进行了分析.结果表明,SrAl_2O_4∶Eu^(2+),Dy^(3+)荧光粉的最佳煅烧温度为1 500℃,最佳煅烧时间为3 h.当Eu_2O_3的质量分数为2%时,Sr Al2O4∶Eu2+荧光粉的发光强度最大;当Eu_2O_3的质量分数为1.5%时,SrAl_2O_4∶Eu^(2+)荧光粉的余辉性能最好;当Eu_2O_3的质量分数为2%、Dy_2O_3的质量分数为4%时,SrAl_2O_4∶Eu^(2+),Dy^(3+)荧光粉的发光强度和余辉性能最好.

In order to improve the luminescence intensity and afterglow time of SrA1204： Eu2＋, Dy3＋ fluorescent material, the SrA1204： Eu2＋, Dy3＋ fluorescent powder was synthesized with high temperature solid state method. The chemical composition, structure, microscopic morphology and luminescent properties of products were analyzed with X ray diffractometer （XRD）, scanning electron microscope （SEM） and fluorescence spectrometer. The results show that the optimum calcination temperature of SrA12Oa：EU2＋ , Dy3＋ fluorescent powder is 1500 ℃, and the optimum calcination time is 3 h. When the mass fraction of Eu203 is 2% , the SrA1204 ： Eu2＋ fluorescent powder has the maximum luminescence intensity. When the mass fraction of Eu203 is 1.5% , the SrA1204： Eu2＋ fluorescent powder has the best afterglow performance. When the mass fraction of Eu203 is 2% and the mass fraction of Dy203 is 4%, the SrA1204： Eu2＋ , Dy3＋ luorescent powder has the best luminescence intensity and afterglow performance.