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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

Inactive Publication Date: 2008-02-13
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the particle size range required for the application of rare earth long afterglow materials is between 20 and 200 μm. All of the above materials have high sintering hardness, and long afterglow luminescent materials with a particle size of 20 to 200 μm can only be obtained by grinding. The material is bound to destroy the crystal form of the luminescent material and reduce the luminous brightness

Method used

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Experimental program
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Embodiment Construction

[0012] will analyze pure SrCO 3 , CaCO 3 , MgO, 99~99.99%Al 2 o 3 , 99~99.99% SiO 2 And 99.5~99.99%Eu 2 o 3 、Dy 2 o 3 , mixed according to the ratio in Table 1, mixed in a closed container for 8 hours, and then put the mixture in N 2 +H 2 Under the atmosphere, keep warm in a high-temperature furnace at 1300-1500°C for 5 hours to obtain a quicksand-like rare earth long-lasting luminescent material. Without grinding, rare earth long-lasting luminescent materials with particle sizes ranging from 30 to 200 μm can be obtained. Fig. 1, 2, 3, 4 are respectively the particle size distribution diagram of embodiment 1, 2, 6, 7.

[0013] Table 1

[0014]

serial number

Raw material composition (molar ratio)

The type and proportion of RO co-solvent

the peak

nm

granularity

μm

relative brightness

60s

Example 1

1SrCO 3 .1Al 2 o 3 .0.001MgO:

0.005Eu 2 o 3 .0.005Dy...

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PUM

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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)y'. (Dy2O3)z'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.

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 and other long afterglow luminescent materials. Due to the low luminous brightness and short afterglow time of sulfide long afterglow materials, and the problems of easy decomposition and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 倪海勇周绍辉李许波黄朝辉肖方明
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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