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By adjusting the matrix component proportion£¬research the phosphor crystal structure of SrAl2xO3x+1:Eu2+,Dy3+£¨x=1~2£©, luminance and persistence characteristic.Select strontium nitrate and aluminium nitrate as stroma materials, use AmmoniumBorate and aluminium fluoride as latent solvent, synthesis series of long-lasting phosphor by the stepwise synthesis and  co-precipitates of oxalates ,wet-mixing. the long-lasting phosphor in the paper having the qualities of High brightness,long afterglow, Good particle size distribution.
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The Xs and emission spectrum results showed that SrAl2xO3x+1: Eu2+,Dy3+ have good crystallizationcan , with the x increasing he excited from 520nm to 470nm.
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