燃烧法合成超细SrAl_2O_4:Eu^(2+),Dy^(3+)长余辉发光材料

Study on Long Persistence Phosphors SrAl_2O_4:Eu^(2+),Dy^(3+) Synthesized by Combustion Synthesis Method

利用氧化还原反应燃烧过程合成SrAl2O4:Eu2+,Dy3+长余辉发光材料,采用荧光光谱、X射线衍射、扫描电镜、余辉测试等多种测试手段研究产物的性质,并从多方面与高温固相法合进行对比。结果表明:燃烧法合成的产物为单斜晶系的SrAl2O4,结晶干净完整,晶粒尺寸在0.3～1μm之间;光谱分析显示燃烧法合成材料发射波长为514 nm。相比高温固相法,燃烧法在工艺上具有低温、快速、节能的优点,所得产物易于粉碎,晶粒大大减小。

SrAl2O4： Eu^2＋, Dy^3＋ long persistence phosphors were synthesized by combustion synthesis. The phosphors were characterized by X ray diffractometer（XRD）, scanning electron microscope （SEM）, fluorescence spectra and afterglow property test. The contrast of the high temperature solid method and combustion synthesis method was studied for the processing technology and product＇s performances. The results showed that the as-prepared SrAl2O4 belonged to monoclinic system and their grain size was between 0.3 - 1 μm along with fine crystal integrity, which was smaller than that of samples synthesized by high temperature solid method. The spectral analysis revealed that the samples synthesized by combustion synthesis exhibited the broadband peaks in both excitation and emission spectra in which the main excitation peak located at around 368 nm and the main emission peak was around 514 nm.