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Gadolinium ion doped hollow-sphere-structural garnet system luminescent material and preparation method thereof

The technology of luminescent material and hollow sphere is applied in the field of luminescent material and preparation of hollow sphere structure garnet system doped with gadolinium ions, and can solve the problems of inferior luminous intensity of fluorescent powder, inconsistent powder particle size, high temperature reaction and high energy consumption, etc. , to achieve the effect of low cost, less harsh process conditions and fewer process steps

Inactive Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Most of the current luminescent materials are prepared by high-temperature solid-state method. The high-temperature reaction consumes a lot of energy, the particle distribution is uneven, and the particle shape is different. It is necessary to use the method of ball milling to obtain phosphors with a particle size of 2-8 microns, and The particle size of the powder is inconsistent and the shape is incomplete, resulting in uneven coating
People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not as high as high temperature solid phase synthesis

Method used

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  • Gadolinium ion doped hollow-sphere-structural garnet system luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of hollow sphere structure Y by precipitation method 2.55 Al 5 o 12 :Gd 0.45 3+ :

[0029] Weigh 4g of glucose and dissolve it in absolute ethanol to make the solution volume 40mL, then transfer the solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 120°C for 36h to prepare carbon The bead solution was washed several times with deionized water and absolute ethanol, centrifuged, and dried at 60°C to obtain carbon bead C coated with metal nanoparticles for use;

[0030] Weigh 11.2900g Y 2 o 3 Dissolved in nitric acid to obtain 100mL1mol / L of Y(NO 3 ) 3 solution; weigh 5.0980g Al 2 o 3 Dissolved in nitric acid to obtain 100mL1mol / L Al(NO 3 ) 3 Solution; Weigh 108.7500g Gd 2 o 3 Dissolved in nitric acid to obtain 100mL 3mol / L of Gd(NO 3 ) 3 solution.

[0031] Follow Y 2.55 Al 5 o 12 :Gd 0.45 Pipette 5.1mL1mol / L Y(NO 3 ) 3 , 10mL1mol / L Al(NO 3 ) 3 and 0.3mL3mol / L Gd(NO 3 ) 3 sol...

Embodiment 2

[0034] Preparation of hollow sphere structure Y by precipitation method 2.7 Ga 5 o 12 :Gd 0.3 3+ :

[0035] Weigh 0.003g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover and tighten it, and react at 150°C for 10h to prepare carbon The bead solution was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 70°C to obtain carbon bead C.

[0036] Follow Y 2.7 Ga 5 o 12 :Gd 0.3 The stoichiometric ratio pipette 10.8mL0.5mol / L Y(CH 3 COO) 3 solution, 20mL0.5mol / L Ga(CH 3 COO) 3 solution and 0.3mL2mol / L Gd(CH 3 COO) 3 Solution, placed in a 100mL beaker to form a mixed solution, then weighed carbon pellets C0.6mg into the mixed solution, and stirred evenly. Under magnetic stirring, add the above mixed solution dropwise to 15mL precipitant oxalic acid solution (2mol / L), and then adjust the pH...

Embodiment 3

[0039] Preparation of hollow sphere structure Y by precipitation method 2.85 (Al 0.8 Ga 0.2 ) 5 o 12 :Gd 0.15 3+ :

[0040] Weigh 5g of glucose and dissolve it in absolute ethanol to obtain 40mL of glucitol solution, transfer this solution into a 50mL reaction kettle with a polytetrafluoroethylene liner, cover it and tighten it, and react at 180°C for 24h to prepare carbon small The solution of the spheres was centrifuged to obtain a solid phase, washed twice with deionized water and absolute ethanol, and dried at 60°C to obtain carbon spheres C.

[0041] Follow Y 2.85 (Al 0.8 Ga 0.2 ) 5 o 12 :Gd 0.15 Pipette 5.7mL1mol / L Y(NO 3 ) 3 solution, 8mL1mol / L Al(NO 3 ) 3 solution, 2mL1mol / L Ga(NO 3 ) 3 solution and 6mL0.05mol / L Gd(NO 3 ) 3 solution, placed in a 100mL beaker to form a nitric acid mixture, then weighed 120mg of carbon pellets C and added to the mixture, and stirred evenly. Under magnetic stirring, add the above mixed solution dropwise to 30mL precip...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a gadolinium ion doped hollow-sphere-structural garnet system luminescent material and a preparation method thereof; the general chemical formula of the luminescent material is Y3-x(Al1-yGay)5O12:Gdx<3+>, wherein x is in the value range of 0 < x<=0.45, and y is in the value range of 0 <= y<=1. By use of dispersed carbon spheres C as templates, the prepared garnet system luminescent material is in a spherical hollow structure, is controllable in morphology, can effectively reduce the use amount of rare earth metals, reduces the product cost, and saves precious rare earth resources in large quantities.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a hollow sphere structure garnet system luminescent material doped with gadolinium ions and a preparation method thereof. Background technique [0002] Most of the current luminescent materials are prepared by high-temperature solid-state method. The high-temperature reaction consumes a lot of energy, the particle distribution is uneven, and the particle shape is different. It is necessary to use the method of ball milling to obtain phosphors with a particle size of 2-8 microns, and The particle size of the powder is inconsistent and the shape is incomplete, resulting in uneven coating. People prepare phosphors by using sol-gel method, hydrothermal synthesis method, complex gel method and other methods. These methods can make up for the deficiency of high-temperature solid-phase synthesis method, but the luminous intensity of phosphor powder obtained by these methods is not a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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