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Preparation method of europium-activated aluminate blue fluorescent powder

A technology of blue fluorescent powder and aluminate, which is applied in chemical instruments and methods, luminescent materials, sustainable manufacturing/processing, etc., can solve the problems of complex process, inability to obtain particle size, small distribution, etc., and achieve particle size Uniform distribution, good for screen coating and short sintering time

Inactive Publication Date: 2014-01-01
JIANGMEN KANHOO IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to eliminate the light decay caused by the grain degradation caused by ball milling, people have explored some new europium-activated aluminate blue phosphor synthesis methods, such as sol-gel method (such as CN1197831, CN1334309, CN1903977A, etc.), coprecipitation method etc. Although these methods can reduce the synthesis temperature, the process is more complicated, and the same uniform spherical particles with small particle size cannot be obtained.

Method used

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  • Preparation method of europium-activated aluminate blue fluorescent powder
  • Preparation method of europium-activated aluminate blue fluorescent powder
  • Preparation method of europium-activated aluminate blue fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Ba 0.9 MgAl 10 o 17 :Eu 0.1

[0023] 1) Take Ba(NO 3 ) 2 Solution (0.4mol / L) 90ml, Al(NO 3 ) 3 Solution (1mol / L) 400ml, Mg(NO 3 ) 2 Solution (0.4mol / L) 100ml, Eu(N0 3 ) 3 20ml of the solution (0.2mol / L) was mixed evenly to obtain a mixed solution;

[0024] 2) Using ammonia water to adjust the pH of the mixed solution to 2 to obtain a precursor solution;

[0025] 3) Import the precursor mixed solution into the ultrasonic nebulizer, send it into the reaction furnace through the carrier gas, control the temperature of the reaction furnace to 800°C, and react for 5 minutes to obtain the precursor;

[0026] 4) Place the precursor in a microwave reaction furnace, the temperature of the microwave reaction furnace is 1000°C, and place it in a reducing atmosphere in the microwave reaction furnace (N 2 :H 2 =9:1) for 25 minutes;

[0027] 5) Reduce to room temperature in a reducing atmosphere, the obtained powder is naturally dissolved in deionized water,...

Embodiment 2

[0028] Example 2: Ba 0.88 MgAl 10 o 17 :Eu 0.12

[0029] 1) Take Ba(NO 3 ) 2 Solution (0.4mol / L) 88ml, Al(NO 3 ) 3 Solution (1mol / L) 400ml, Mg(NO 3 ) 2 Solution (0.4mol / L) 100ml, Eu(NO 3 ) 3 Solution (0.2mol / L) 24ml was mixed evenly to obtain a mixed solution;

[0030] 2) Using a urea solution to adjust the pH of the mixed solution to 1 to obtain a precursor solution;

[0031] 3) Introduce the precursor mixed solution into the ultrasonic nebulizer, send it into the reaction furnace through the carrier gas, control the temperature of the reaction furnace at 900°C, and react for 4 minutes to obtain the precursor;

[0032] 4) Place the precursor in a microwave reaction furnace, the temperature of the microwave reaction furnace is 1200°C, and the reducing atmosphere (N 2 :H 2 =1:1) for 15 minutes;

[0033] 5) Reduce to room temperature in a reducing atmosphere, the obtained powder is naturally dissolved in deionized water, washed with nitric acid solution, finally w...

Embodiment 3

[0034] Example 3: Ba 0.9 Mg 1.1 Al 10 o 17 :Eu 0.1

[0035] 1) Take Ba(NO 3 ) 2 Solution (0.4mol / L) 90ml, Al(NO 3 ) 3 Solution (1mol / L) 400ml, Mg(NO 3 ) 2 Solution (0.4mol / L) 110ml, Eu(NO 3 ) 3 20ml of the solution (0.2mol / L) was mixed evenly to obtain a mixed solution;

[0036] 2) Using ammonia water to adjust the pH of the mixed solution to 3 to obtain a precursor solution;

[0037] 3) Introduce the precursor mixed solution into the ultrasonic nebulizer, send it into the reaction furnace through the carrier gas, control the temperature of the reaction furnace to 1100°C, and react for 2 minutes to obtain the precursor;

[0038] 4) Put the precursor in a microwave reaction furnace, the temperature of the microwave reaction furnace is 1100°C, and place it in a reducing atmosphere in the microwave reaction furnace (N 2 :H 2 =1:3) for 20 minutes;

[0039] 5) Reduce to room temperature in a reducing atmosphere, the obtained powder is naturally dissolved in deionize...

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Abstract

The invention discloses a preparation method of europium-activated aluminate blue fluorescent powder. The preparation method comprises the following steps of: weighing soluble salts of corresponding elements according to compositions of the fluorescent powder, and preparing into a mixed solution; adjusting the pH value of the mixed solution into 1 to 3 by using an alkaline solution, obtaining a precursor mixed solution, introducing into an ultrasonic sprayer, conveying into a reaction furnace by carrier gas, controlling the temperature of the reaction furnace to be 800-1100 DEG C, and reacting for 2-5min to obtain a precursor; putting the precursor into a microwave reaction furnace, reacting for 15-30min in the reducing atmosphere of 800-1200 DEG C, then reducing the temperature to room temperature in the reducing atmosphere, washing and drying to obtain a finished product. The method has simple steps, easy control of reaction conditions, short sintering time, low reaction temperature, less energy consumption, energy saving, environmental protection and prolonging of the service life of a device; and the prepared fluorescent powder is beneficial to coating, and has loose powder body, approximately spherical granules, even grain diameter distribution, no grinding, good brightness and heat stability.

Description

technical field [0001] The invention relates to a preparation method of blue fluorescent powder, in particular to a preparation method of europium-activated aluminate blue fluorescent powder. Background technique [0002] Plasma flat-panel display PDP has the advantages of ultra-thin, high-definition, large picture, etc., and is recognized by the world as the preferred technology for wall-mounted high-definition television HDTV, and phosphor plays a decisive role in the performance of PDP. [0003] The general formula of europium-activated aluminate blue phosphor is (Ba 1-x-z ,Sr z )Mg y Al 10 o 17 :Eu x (where: 0.05≤x≤0.15; 0≤z≤0.25; 1.0≤y≤1.4), this kind has high quantum efficiency and good color purity under vacuum ultraviolet excitation, and is an excellent high-efficiency blue fluorescent material for plasma displays. [0004] At present, this kind of blue fluorescent powder produced at home and abroad is mostly synthesized by high-temperature solid-phase method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCY02P20/10
Inventor 陈伟万国江
Owner JIANGMEN KANHOO IND
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