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Method for synthesizing fluorescent powder of yttrium aluminum garnet

A technology of yttrium aluminum garnet and synthesis method, which is applied in the field of phosphor powder preparation, can solve problems such as difficulty in obtaining uniformly dispersed particles, small powder, and hard agglomeration of phosphor particles, and achieve easy washing and filtering, easy control, and particle evenly distributed effect

Inactive Publication Date: 2012-09-26
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, experiments have found that the fluorescent powder particles prepared by the above method still have hard agglomeration phenomenon, and it is difficult to obtain powders with uniform dispersion and small particles.

Method used

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  • Method for synthesizing fluorescent powder of yttrium aluminum garnet
  • Method for synthesizing fluorescent powder of yttrium aluminum garnet
  • Method for synthesizing fluorescent powder of yttrium aluminum garnet

Examples

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Embodiment 1

[0035] Select the raw material, the raw material is selected from Y 2 o 3 , Ce(NO 3 ) 3 , Al(NO 3 ) 3 , its composition and content according to Y 3-x Al 5 o 12 : Ce 3+ x , where x = 0.06 mol / mol. First prepare the metal ion mixed solution; then prepare the composite precipitant, and then prepare the precursor by chemical co-precipitation method. The reaction process is carried out in the ultrasonic microwave synthesizer, the ultrasonic time is 5min, the microwave power is 100w, and the concentration of the reactant is controlled. 1mol / L, precipitant NH 4 HCO 3 The concentration of the solution is 1mol / L, the speed of adding the mixed solution of yttrium aluminum cerium metal salt ion is 2L / min, carry out strong magnetic stirring, after the addition is completed, the ammonia solution is slowly dropped into the mixed solution, the pH is controlled at 8, all drops Continue to stir for 0.5h after the addition, and age for 8h; after the aging, take the precursor out an...

Embodiment 2

[0038] Select the raw material, the raw material is selected from Y 2 o 3 , Gd 2 o 3 , Ce(HNO 3 ) 3 , Pr 2 o 3 , Al(HNO 3 ) 3 , Ga 2 o 3 , ScO 2 , its composition according to (Y 1-x Gd x ) 3 (Al 1-y-z Ga y sc z ) 5 o 12 : Ce m 3+ PR n 3+ , where x=0.1 mol / mol, y=0.1 mol / mol, z=0.2 mol / mol, m=0.06 mol / mol, n=0.1 mol / mol. First prepare the metal ion mixed solution; then prepare the composite precipitant, and then prepare the precursor by chemical co-precipitation method. The reaction process is carried out in the ultrasonic microwave synthesizer, the ultrasonic time is 5min, the microwave power is 100w, and the concentration of the reactant is controlled. is 1mol / L, the reaction temperature and aging temperature are both at room temperature, and the precipitant NH 4 HCO 3 The concentration of the metal salt ion solution is 1mol / L, the speed of adding the metal salt ion solution is 2L / min, and strong magnetic stirring is carried out. After the addition i...

Embodiment 3

[0041] Select the raw material, the raw material is selected from Y 2 o 3 , Ce(NO 3 ) 3 , Al(NO 3 ) 3 , Pr 2 o 3 , its composition and content according to Y 3-x-y Al 5 o 12 : Ce 3+ x , where x = 0.06 mol / mol. First prepare the metal ion mixed solution; then prepare the composite precipitant, and then prepare the precursor by chemical co-precipitation method. The reaction process is carried out in the ultrasonic microwave synthesizer, the ultrasonic time is 5min, the microwave power is 100w, and the concentration of the reactant is controlled. is 1mol / L, the reaction temperature and aging temperature are both at room temperature, and the precipitant NH 4 HCO 3 The concentration of the metal salt ion solution is 1mol / L, the speed of adding the metal salt ion solution is 2L / min, and strong magnetic stirring is carried out. After the addition is completed, the ammonia solution is slowly dropped into the mixed solution, and the pH is controlled at 8. After the additio...

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Abstract

The invention discloses a method for synthesizing fluorescent powder of yttrium aluminum garnet. The method comprises the following steps of: dropping ammonium bicarbonate solution into metal ion solution by using a composite precipitating agent, wherein the composite precipitating agent is ammonium bicarbonate and ammonia water; and adding ammonia water solution into mixed solution after dropping the ammonium bicarbonate solution. In the method, additives (a dispersing agent and a fluxing agent) are added during coprecipitation to promote the formation and growth of aluminate crystals and obviously reduce the sintering degree of the fluorescent powder. The method effectively controls the morphology of aluminate fluorescent powder particles and obtains regularly hexagonal flaky particles with small particle sizes.

Description

technical field [0001] The invention relates to the technical field of preparation of fluorescent powder for displays, fluorescent lamps, LEDs, light storage materials, etc., in particular to a synthesis method of yttrium aluminum garnet fluorescent powder. Background technique [0002] The aluminate fluorescent powder involved in the present invention is yttrium aluminum garnet structure (YAG). Yttrium aluminum garnet is a rare earth aluminate garnet synthesized by the reaction of yttrium oxide and aluminum oxide. It belongs to the cubic crystal system. It is a crystal with high hardness and high melting point. It has good mechanical strength and chemical stability. , Thermal conductivity, is a single crystal material with excellent performance. It is precisely because of these excellent properties of YAG that it shows excellent application prospects no matter it is used as a structural material or a functional material. In addition, YAG powder is doped with Ce 3+ , Tb ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C01F17/00
Inventor 关荣锋李帅谋李卫彬李勤勤
Owner HENAN POLYTECHNIC UNIV
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