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A new type phosphor SrA12O4:Eu with long persistent aftergrow inthe system of SrO--Al.O.was reported in this paper.The phosphor was found inthe SrAI.O' monoelinio 6rystal structure as measured by X--ray powder didrietion.The luminescenoe of phosphor was the typieal d--f tranaition of Eu'+, according tothe excitation spectrum and emisaion spectrum. After excitation by the UVfluoreasn' lamp, the aftergrow luminescence of phoaphor could las' 10 h with ahyperbola aam decay, showing 'he Oharaeteris'ie of recombination Inmineseence.The measarements of thermolnminescence speetra showed that there were twothermoluminescence peaal iring at 333"K and 378'K, refleqting that the electrontraps existed in the Phosphor. furthermore,experiments edsbited that theimpurity component Mg formed the electron traps and made the phoBphor poBeessthe long aftergrow Inmineseence property.
【CateGory Index】: TM923.04
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