Rapidly synthesized aluminate long-afterglow luminescent material and preparation method thereof

A technology of long afterglow luminescence and long afterglow materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc. It can solve the problems of long heating time, energy waste, and coarse product particles, and achieve the improvement of crystal phase purity, increase luminous intensity, and precipitation fine and uniform effect

Inactive Publication Date: 2012-02-01
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the current method of preparing long-lasting luminescent materials, the product particles prepared by the traditional method are relatively coarse, and the luminous efficiency is not very high.
The conventional sintering method is obtained by heating and sintering in a resistance furnace. This kind of heating is to heat the material through heat radiation conduction, which makes it difficult for the material to be heated uniformly, and the crystal purity and luminescence performance are limited to a certain extent. A lot of heat loss, resulting in a waste of energy

Method used

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  • Rapidly synthesized aluminate long-afterglow luminescent material and preparation method thereof
  • Rapidly synthesized aluminate long-afterglow luminescent material and preparation method thereof
  • Rapidly synthesized aluminate long-afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the general formula Sr (1-x-y) Al 2 o 4 :Eu x , Dy y , where x=0.001, y=0.01, 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 O 0.273g, respectively dissolved with deionized water, wherein the solid-to-liquid ratio is 1:1~2; after mixing the solutions, add to 800ml (NH 2 ) 2 CO solution, the (NH 2 ) 2 The concentration of the CO solution is 0.8mol / L, the molar ratio of the added amount of the urea solution to the soluble material is 8:1, then heated to 96°C and stirred to form a precipitate, and the precipitate is separated from the liquid; Washed twice with deionized water, then dried the washed product by microwave drying, and dried at 600W for 30min to obtain composite precursor fractions with fine and uniform particle size. Then at 90% N 2 ~10%H 2 Under a mixed atmosphere, sinter in a microwave sintering furnace at 3000W for 15min to obtain Sr 0.989 Eu 0.001 Dy 0.01 Al...

Embodiment 2

[0019] According to the general formula Sr (1-x-y) Al 2 o 4 :Eu x , Dy y , where x=0.015, y=0.1, first weigh ①Sr(NO 3 ) 2 216.697g, ②Al(NO 3 ) 3 9H 2 O 75.022g, ③Eu(NO 3 ) 3 ·6H 2 O 0.07g, ④Dy(NO 3 ) 3 ·6H 2 O0.137g, 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 amount of the urea solution added to the soluble material is 5:1, then heated to 96°C and stirred to form a precipitate, and the precipitate is separated from the liquid; then the precipitate is used Washed twice with deionized water, then dried the washed product by microwave drying, and dried at 600W for 30min to obtain composite precursor fractions with fine and uniform particle size. Then at 90% N 2 ~10%H 2 Under a mixed atmosphere, sinter in a microwave sintering furnace at 2500W for 20min to obtain S...

Embodiment 3

[0021] According to the general formula Sr (1-x-y) Al 2 o 4 :Eu x , Dy y , where x=0.03, y=0.2, first weigh ①Sr(NO 3 ) 2 18.411g, ②Al(NO 3 ) 3 9H 2 O 75.022g, ③Eu(NO 3 ) 3 ·6H 2 O 0.105g ④Dy(NO 3 ) 3 ·6H 2 O0.206g, 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 0.6mol / L, the molar ratio of the added amount of the urea solution to the soluble material is 6:1, then heated to 96°C and stirred to form a precipitate, and the precipitate is separated from the liquid; Washed twice with deionized water, then dried the washed product by microwave drying, and dried at 600W for 30min to obtain composite precursor fractions with fine and uniform particle size. Then at 90% N 2 ~10%H 2 Under a mixed atmosphere, sinter in a microwave sintering furnace at 2000W for 25min to obtain Sr 0.77 Eu 0.03 Dy 0.2 Al 2 ...

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Abstract

The invention provides a rapidly synthesized aluminate long-afterglow luminescent material and a preparation method thereof. The preparation method comprises the following steps: dissolving weighed soluble raw materials Sr, Al, Eu and Dy according to a general formula Sr(1-x-y) Al2O4:Eux, Dyy into deionized water for preparing a mixed solution; then, adding a urea solution in the mixed solution, heating and mixing so as to form a precipitate, separating the precipitate from the liquid, and then drying the washed precipitate through microwave drying for 30 minutes at the power of 600W so as to obtain a composite precursor powder with fine and uniform particle diameter; subsequently, carrying out microwave sintering on the powder for 15-25 minutes under the mixed protective atmosphere formed by hydrogen and nitrogen at the power of 2000-3000W; and finally, grinding and screening.

Description

technical field [0001] The invention relates to a preparation method of an aluminate long afterglow luminescent material, in particular to a rapid synthesis of 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 excelle...

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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