在600 ℃下用自蔓延高温法制备了SrAl2O4∶Eu2+0.012 5, RE3+0.012 5 (RE3+=Ce3+, Pr3+, Nd3+, Tb3+, Dy3+), SrAl2O4∶Eu2+0.012 5, M0.012 5(M=Li+, Be2+, Cd2+, Mn2+, Cu2+, Ag+, Zn2+, Pb2+), SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5, M0.012 5(M=Mn2+, Cu2+, Ag+, Zn2+)及SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5, RE3+0. 012 5 (RE3+=Ce3+, Pr3+, Nd3+, Tb3+)四个系列21种掺杂的铝酸锶(SrAl2O4)稀土长余辉发光粉。 反应得到的产物疏松多孔, 有很强发射峰位于514 nm附近, 激发光谱为290～360 nm 的宽带激发峰, Dy3+对余辉时间影响最明显, Tb3+对发光强度影响最大, 组成为SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5的发光粉的发光强度及余辉时间较好, 掺入锌离子后形成SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5, Zn2+0.012 5可显著提高初始余辉亮度。

Twenty one doped SrAl2O4 long after-glowed phosphors with 4 series were synthesized by self-propagating high-temperature synthesis method (SHS) with urea-nitrate solution which served as media at 600 ℃. They are SrAl2O4∶Eu2+0.012 5, RE3+0.012 5(RE3+=Ce3+, Pr3+, Nd3+, Tb3+, Dy3+), SrAl2O4∶Eu2+0.012 5, M0.012 5(M=Li+, Be2+, Cd2+, Mn2+, Cu2+, Ag+, Zn2+, Pb2+), SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5, M0.012 5(M=Mn2+, Cu2+, Ag+, Zn2+), and SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5, RE3+0.012 5(RE3+=Ce3+, Pr3+, Nd3+, Tb3+), of which luminescence and after-glowing features were tested. The morphology of all these samples presents a state of porosity and laxity. The samples show an intense emission peak at 514 nm and broad peaks of the excitation spectra at 290～360 nm, Tb3+ and Dy3+ had most effects on luminance and after-glowed time respectively. The SrAl2O4∶Eu2+0.012 5, Dy3+0.012 5 had good luminance and proper after-glowed time as well.