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Aluminate long afterglow luminescent material and preparing method thereof

A long afterglow luminescence, aluminate technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as limitations

Inactive Publication Date: 2010-06-02
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the surface composed of large particles is limited when activated to emit light.

Method used

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  • Aluminate long afterglow luminescent material and preparing method thereof
  • Aluminate long afterglow luminescent material and preparing method thereof
  • Aluminate long afterglow luminescent material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the general formula M (1-x-y) al 2 o 4 :Eu x , Dy y First weigh ①Sr(NO 3 ) 2 20.845g, ②Al(NO 3 ) 3 9H 2 O 75.022g, ③Eu(NO 3 ) 3 ·6H 2 O 0.139g ④Dy(NO 3 ) 3 ·6H 2 O0.273g, dissolve respectively with deionized water; Wherein the solid-liquid ratio is 1: 1~2; After mixing each solution again, add to 600ml (NH 2 ) 2 CO solution, the (NH 2 ) 2 The concentration of the CO solution is 0.4mol / L, the molar ratio of the added amount of the urea solution to the soluble material is 5-8:1, then heated to 96°C and stirred to form a precipitate, and the precipitate is separated from the liquid; Wash 1-2 times with deionized water, and then dry the washed product in a vacuum drying oven at a drying temperature of 90°C to obtain composite precursor fractions with fine and uniform particle sizes. Then at 90% N 2 ~10%H 2 Under a mixed atmosphere, keep it in a sintering furnace at 1300°C for 4 hours to obtain SrAl 2 o 4 :Eu 2+ , Dy 3+ The long-lasting l...

Embodiment 2

[0028] According to the general formula M (1-x-y) al 2 o 4 :Eu x , Dy y First weigh ①Ca(NO 3 ) 2 23.260g, ②Al(NO 3 ) 3 9H 2 O 75.022g, ③Eu(NO 3 ) 3 ·6H 2 O 0.139g ④Dy(NO 3 ) 3 ·6H 2 O0.273g was dissolved in deionized water respectively, wherein the solid-to-liquid ratio was 1:1-2; after the solutions were mixed, they were added to 800ml (NH 2 ) 2 CO solution, the (NH 2 ) 2 The concentration of the CO solution is 0.6mol / L, the molar ratio of the added amount of the urea solution to the soluble material is 5-8:1, then heated to 99°C and stirred to form a precipitate, and the precipitate is separated from the liquid; Wash with deionized water for 1-3 times, and then dry the washed product in a vacuum drying oven at a drying temperature of 120° C. to obtain a precursor powder. Then at 90% N 2 -10%H 2 Under a mixed atmosphere, keep it in a sintering furnace at 1400°C for 3 hours to obtain CaAl 2 o 4 :Eu 2+ , Dy 3+ The long-lasting luminescent material is gro...

Embodiment 3

[0030] According to the general formula M (1-x-y) al 2 o 4 :Eu x , Dy y First weigh ①Ba(NO 3 ) 2 25.741g, ②Al(NO 3 ) 3 9H 2 O 75.022g, ③Eu(NO 3 ) 3 ·6H 2 O 0.139g ④Dy(NO 3 ) 3 ·6H 2O0.273g was dissolved in deionized water respectively, wherein the solid-to-liquid ratio was 1:1-2; after the solutions were mixed, they were added to 800ml (NH 2 ) 2 CO solution, the (NH 2 ) 2 The concentration of the CO solution is 1mol / L, the molar ratio of the amount of the urea solution added to the soluble material is 5-8:1, then heated to 80°C and stirred to form a precipitate, and the precipitate is separated from the liquid; Washing with deionized water for 1-3 times, and then drying the washed product in a vacuum drying oven to obtain the precursor powder. Then at 90% N 2 -10%H 2 Under a mixed atmosphere, keep it in a sintering furnace at 1600°C for 5 hours to obtain CaAl 2 o 4 :Eu 2+ , Dy 3+ The long-lasting luminescent material is ground and sieved to obtain the ...

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Abstract

The invention relates to an aluminate long afterglow luminescent material and a preparing method thereof. The method comprises the following steps of: a). adopting deionized water to dissolve soluble materials of M, Al, Eu and Dy according to a general formula of M (1-x-y) Al2O4: Eux, Dyy to prepare solution, performing precipitation by using carbamide as precipitating agent, preparing Eu+3 nitrate and Dy+3 nitrate into solution to be added into the solution, heating and stirring the solution to obtain precursor mixed precipitate, and separating the precipitate from liquid; b). cleaning the precipitate with deionized water, and then drying the precipitate to obtain composite precursor powder with fine and uniform particle diameter; and c). performing sintering in a high-temperature furnace under the mixed atmosphere of N2-H2 to obtain M (1-x-y) Al2O4: Eux, Dyy long afterglow luminescent material, and grinding and sieving the M (1-x-y) Al2O4: Eux, Dyy long afterglow luminescent material to obtain powder with the required particle diameter. The precursor mixed precipitate prepared by carbamide (NH2) 2CO) as precipitating agent through a coprecipitation method prevents production particles from forming conglobation, ensures that the production particles keep fine and uniform, and obviously improves the luminescent performance, therefore, prefect luminescent material is obtained.

Description

technical field [0001] The invention relates to a luminescent material, in particular to an aluminate long afterglow luminescent material and a preparation method thereof. Background technique [0002] At present, the application of luminescent materials has been very extensive, and the alkaline earth metal aluminate luminescent materials activated by rare earth ions have become a research hotspot of long afterglow luminescent materials. Because its performance is far stronger than the previous sulfide-based long-lasting luminescent materials, it has the advantages of high brightness, long afterglow time, safety and reliability, etc., and has been adopted more and more. This material emits visible light in a dark place after being irradiated by sunlight, fluorescent lamps and other light sources for a short time, and its luminous duration can reach more than ten hours at most. [0003] Due to its excellent performance, it can be widely used in various aspects, such as lumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 王少卿
Owner IRICO
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