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 ℃. They are SrAl₂O₄: Eu_x²⁺, Dy_y³⁺, (x:y=1:1, x:y=2:1), SrAl₂O₄: Eu_0.0125²⁺, RE_0.0125³⁺ (RE³⁺=Ce³⁺,Pr³⁺,Nd³⁺,Tb³⁺,Dy³⁺), SrAl₂O₄: Eu_0.0125²⁺, M_0.0125(M=Li⁺, Be²⁺, Cd²⁺,Mn²⁺, Cu²⁺, Ag⁺, Zn²⁺, Pb²⁺) Sr_xM_(1-x)Al₂O₄: Eu_0.0125²⁺, Dy_0.0125³⁺ (M=Li⁺, Be²⁺, Cd²⁺, Zn²⁺, Pb²⁺), SrAl₂O₄: Eu_0.0125²⁺,Dy_0.0125³⁺, M_0.0125 (M=Mn²⁺, Cu²⁺, Ag⁺, Zn²⁺, Pb²⁺) , SrAl₂O₄: Eu_0.0125²⁺, Dy_0.0125³⁺, RE_0.0125³⁺ (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 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: Eu_0.0125²⁺, Dy_0.0125³⁺ has good luminance and proper after-glowed...