Long-afterglow luminescent material and its preparation method

摘要

formula aMO bM'(SSe_1- ) cAl₂O₃ dB₂O₃ eP₂O₅:xEu yLn I provide a long-afterglow luminescent material is represented , and where M is Sr, Ca, and one or more elements selected from Ba, and Mg, M ' is at least one element selected from Sr, Ca, and Ba, Ln is Nd, Dy, Ho, Tm, La, Ce, Er, Pr, and at least one element selected from Bi and Sm, a, b, c, d, e, x, y are each a number of moles , 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 1.0 , where 0.5 & (a + b) 6.0, 0 & a (d + e) 1.0. The production process is a high temperature solid phase reaction comprising the reduction step following the oxidation step .