Highly bulked long-afterglow luminous material

A long afterglow luminous, high-level technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of destroying the crystal form of luminescent materials, high sintering hardness, and reducing luminous brightness
CN1740268AInactive Publication Date: 2006-03-01INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
Publication Date
2006-03-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The highly bulked long-afterglow luminous material has the general expression of a[(SrCO3)1-X(CaCO3) X].bAl2O3.cSiO2.kMgO:(Eu2O3)yí». (Dy2O3)zí»pRO, where x, a, b, c, k, y, z and p are molar number, x is 0-1, a is 0.9-2, b is 0-4, c is 0-2, k is 0-1, y is 0.001-0.05, z is 0.001-0.05, and p is 0.01-0.1. The long-afterglow luminous material needs no grinding, and thus has greatly kept crystal grain structure. Compared with traditional long-afterglow luminous RE material of the same granularity, the present invention has 10 % raised light emitting brightness. In addition, the present invention has powder yield and lowered production cost.
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Description

technical field

[0001] The invention relates to an inorganic long afterglow luminescent material, in particular to a rare earth alkaline earth aluminate or silicate long afterglow luminescent material. Background technique

[0002] Long-lasting luminescent material is a widely used material, which is composed of matrix material, activator and flux. The matrix material is Al 2 o 3 , SiO 2 , CaCO 3 , MgCO 3 , SrCO 3 etc., the activator uses rare earth oxides, such as Eu 2 o 3 、Dy 2 o 3 , Tb 4 o 7 etc., the flux is H 3 BO 3 Wait.

[0003] The research on long-lasting luminescent materials has a long history. As early as the early 20th century, Lenard prepared fluorescent materials whose activators were Cu, Ag, Bi, Mn sulfides, and then synthesized a series of CaS: Bi, CaSrS : Bi long afterglow luminescent material. Due to the low luminous brightness and short afterglow time of sulfide long afterglow materials, and the problems of easy decomposition and black col...

Claims

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