Long afterglow luminescent material with compounded substrates and its preparation method
AssigneeSichuan Sunfor Light Co., Ltd.
InventorsMing Zhang, Li Zhang, Xiaolei Zhang, Qiang Zhang
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Abstract
The present invention provides a new ultra-long after-glow phosphorescent material and manufacturing method for the same. The said materials include a phosphor including aMS.bM3(PO4)2.cMSiO2.dMO.fAl2O3.xRO.yTR2O3.zMnO, where the M is Ca, Mg, Ba, Sr, Zn or combinations thereof, The R is Eu, Sm, Yb, Pr and Nd or combinations thereof; the TR is La, Y, Nd, Dy, Er, Tu, Ce, Ho or combinations thereof; and a, b, c, d, f x, y, z is the number of mol. The phosphorescent material has superior water resistance and temperature resistance.
Claims12
An ultra-long after-glow phosphorescent material, comprising a phosphor depicted by the formula
- 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 and Nd;
- TR is at least one of La, Y, Nd, Dy, Er, Tu, Ce, and Ho;
- and each of a, b, 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;
- and
- 0.001≦z≦0.2.
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.
Dependencies are inferred from the claim text.