LONG-AFTERGLOW LUMINESCENT MATERIAL AND ITS PREPARATION METHOD

摘要

Long-afterglow luminescent material is represented by the formula aMO.bM'(S<SUB>ß</SUB>Se<SUB>1-ß</SUB>).cAl<SUB>2</SUB>O<SUB>3</SUB>.dB<SUB>2</SUB>O<SUB>3</SUB>.eP<SUB>2</SUB>O<SUB>5</SUB>:xEu.yLn, wherein M is one or more elements selected from Sr, Ca, Ba, and Mg, M' is one or more elements selected from Sr, Ca, and Ba, Ln is one or more elements selected from Nd, Dy, Tm, La, Ce, and Pr, a, b, c, d, e, x, y is molar number respectively, 0.5<a<6.0, 0.0001=b=2.0, 0.5=c=9.0, 0=d =1.0, 0=e=1.0, 0.00001=x=0.25, 0.00001=y=0.3, 0=ß=1.0, wherein 0.5<(a+b) =6.0, 0=(d+e) =1.0. The preparation method is solid phase reaction at high temperature by firstly oxidation and then reduction.