Study on Self-Propagating Synthesis of the Doped SrAl2O4 Rare-Earth Long After-Glowed Phosphors

Study on Self-Propagating Synthesis of the Doped SrAl2O4 Rare-Earth Long After-Glowed Phosphors
　　62 codoped SrAl2O4 long after-glowed phosphors with 6 series are synthesized by SHS method using urea-nitrate solution as media at 600 ℃. rare earth magnets They are SrAl2O4: Eux2+, Dyy3+, (x:y=1:1, x:y=2:1), SrAl2O4: Eu0.01252+, RE0.01253+ (RE3+=Ce3+、Pr3+、Nd3+、Tb3+、Dy3+), SrAl2O4: Eu0.01252+, M0.0125(M=Li+, Be2+, Cd2+,Mn2+, Cu2+, Ag+, Zn2+, Pb2+) SrxM(1-x)Al2O4: Eu0.01252+, Dy0.01253+ (M=Li+, Be2+, Cd2+, Zn2+, Pb2+), SrAl2O4: Eu0.01252+,Dy0.01253+, M0.0125 (M=Mn2+, Cu2+, Ag+, Zn2+, Pb2+) , SrAl2O4: Eu0.01252+, Dy0.01253+, RE0.01253+ (RE3+=Ce3+、Pr3+、Nd3+、Tb3+), luminescent and after-glowing features are tested . Morphology of the sample presents a state of laxity and porous . The sample exhibits an intensity emission peak at 514 nm and the excitation http://www.chinamagnets.biz/ spectra consists of 290-360nm broad peaks .Among the five RE3+ ions with +4 valence discussed in this paper, Tb3+ and Dy3+ lay the most effect on luminance and after-glowed time respectively . The material with SrAl2O4: Eu0.01252+, Dy0.01253+ has good luminance and proper after-glowed