Long afterglow luminescent material with compounded substrates and its preparation method

A method for manufacturing an ultra-long after-glow phosphorescent material, the phosphorescent material comprising a phosphor depicted by

• aMS.bM3(PO4)2.cMSiO3.dMO.fA12O3.xRO.yTR2O3.zMnO, where
• M is at least one of Ca, Mg, Ba, Sr, Zn;
• R is at least one of Eu, Sm, Yb, Pr, Nd;
• TR is at least one of La, Y, Nd, Dy, Er, Tu, Ce, Ho;
• and each of a, c, d, f x, y, z is a number of moles, wherein:
• 0.01≦a≦8;
• 0.01≦b≦6;
• 0.01≦c≦2;
• 0.01≦d≦7;
• 0.01≦f≦7;
• 0.0001≦x≦0.5;
• 0.0001≦y≦0.5;
• 0.001≦z≦0.2;
• wherein the method comprises the following steps:
• 1) using oxides, carbonates, oxalates, nitrates or hydroxides of M as a raw material of M;
• sulfur as a raw material of S;
• phosphorus pentoxide (P2O5), ammonium dihydrogen phosphate (NH4H2PO4) as a raw material of phosphorus;
• silicon dioxide as a raw material of silicon;
• alumina, aluminum hydroxide as a raw material of alumina;
• Oxides of R as a raw material of RO;
• Oxides of elements corresponding to TR as a raw material of TR2O3;
• provided that weight ratios of these raw materials satisfy the above relation of a, b, c, d, f, x, y, and z;
• and also using urea at a molar ratio of urea to M of 0.1-1:1 and LiCl at a molar ratio of LiCl to M of 0.0165-1:1;
• 2) Mixing the above raw materials thoroughly, filling NH3 or adding carbon granules into the mixture, and calcining at 1200-1450° C. for 1-4 h to provide the ultra-long after-glow phosphorescent material.