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Study On Self-Propagating Synthesis Of The Doped SrAl2O4 Rare-Earth Long After-Glowed Phosphors

Posted on:2007-11-02Degree:MasterType:Thesis
Country:ChinaCandidate:Y G LiuFull Text:PDF
GTID:2121360185481929Subject:Inorganic Chemistry
Abstract/Summary:PDF Full Text Request
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: 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 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...
Keywords/Search Tags:Long afterglow, aluminates, self-propagating high-temperature synthesis(SHS), long duration phosphor
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