Metal nano particle-doped rare earth lanthanum aluminate light-emitting material and preparation method thereof

A technology of metal nanoparticles and luminescent materials, which is applied to the preparation of rare earth lanthanum aluminate luminescent materials and the field of rare earth lanthanum aluminate luminescent materials doped with metal nanoparticles, can solve the problem of low luminous efficiency and the like, and achieve simple process and luminescent performance. Good and stable effect

Inactive Publication Date: 2010-12-01
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the previously used rare earth doped lanthanum aluminate has high color purity, but the luminous efficiency is not high

Method used

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  • Metal nano particle-doped rare earth lanthanum aluminate light-emitting material and preparation method thereof
  • Metal nano particle-doped rare earth lanthanum aluminate light-emitting material and preparation method thereof

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preparation example Construction

[0016] The present invention also provides a preparation method of rare earth lanthanum aluminate luminescent material doped with metal nanoparticles, comprising the following steps:

[0017] S1. Add the solution of M to the solution dissolved in polyvinylpyrrolidone, treat the surface of M for 12-24h, and then add Al 3+ Stir the solution and surfactant, then slowly add the precipitant under stirring, react in a water bath at 0-100°C and stir for 1.5-5h, let it stand for aging, then filter to remove the precipitate, wash and dry, and dry the The precipitate of Al 2 o 3 @M powder; wherein, @ is coating, M is metal nanoparticles, at least one selected from Ag, Au, Pt, Pd, Cu;

[0018] S2, according to La 1-x AlO 3 :Ln x @M y The stoichiometric ratio of each element in the formula provides the raw material of La, the raw material of Ln and the above-mentioned Al 2 o 3 @M powder, grind and mix evenly, heat up to 1200 ℃ ~ 1500 ℃ for reduction reaction in reducing atmosphere...

Embodiment 1

[0023] La doped with platinum (Pt) nanoparticles prepared by a solid-state method 0.995 A1O 3 :Sm 0.005 @Pt 5×10 -3

[0024] At room temperature, weigh 0.30 g of polyvinylpyrrolidone (PVP) and dissolve it in 6 mL of deionized water, and add a concentration of 1 × 10 -2 mol / L platinum metal nanoparticle solution 4mL, and stirred for 18h, followed by adding 8mL of A1C1 with a concentration of 1mol / L while stirring 3 solution and 5mL isopropanol, stir well and slowly add 40mL NH with a concentration of 2mol / L dropwise 4 HCO 3 Solution, stirred and reacted for 5 hours, then aged for a certain period of time, repeated several times of filtration, washing, and then dried, and the dried precipitate was heat-treated at 500°C for 8 hours to obtain A1 2 o 3 @Pt 5×10 -3 of powder.

[0025] Weigh 1.1388g of La 2 (CO 3 ) 3 , 0.2549g of A1 2 o 3 @Pt 5×10 -3 and 0.0060g of Sm 2 (CO 3 ) 3 , placed in an agate mortar and ground until well mixed, then transferred the powder...

Embodiment 2

[0027] La doped with Au nanoparticles prepared by a solid-state method 0.97 A1O 3 :Tb 0.03 @Au 1×10 -2

[0028] At room temperature, weigh 0.15g of polyvinylpyrrolidone and dissolve it in 4mL of deionized water, dissolve it, and then add it at a concentration of 1×10 -2 mol / L Au metal nanoparticle solution 6mL, stirred for 12h, then added 6mL Al(NO 3 ) 3 solution and 5% (volume percent, V / V, the same below) polyethylene glycol 2000 (PEG2000) aqueous solution 10mL, and then slowly drop 20mL concentration of 2mol / L (NH 4 ) 2 CO 3 solution, stirred and reacted for 4 hours, then aged for a certain period of time, repeated several times of filtration, washing, and then dried, and heat-treated the dried precipitate at 1000°C for 1.5 hours to obtain Al 2 o 3 @Au 1×10 -2 of powder.

[0029] Then weigh 1.1895g of LaCl 3 , 0.2549g Al 2 o 3 @Au 1×10 -2 and 0.0398g of TbCl 3 , put it in an agate mortar and grind until it is evenly mixed, then transfer the powder to a co...

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Abstract

The invention discloses a metal nano particle-doped rare earth lanthanum aluminate light-emitting material, which belongs to the field of preparation of rare earth lanthanum aluminate light-emitting materials. The material has the chemical general formula of La1-x AlO3:Lnx@My, wherein @ is a cladding, and M is a metal nano particle and is selected from at least one of Ag, Au, Pt, Pd and Cu; and Ln is rare earth metal and is selected from one of Tm, Sm and Tb or a mixture of Sm and Tb, x is more than zero and smaller than or equal to 0.2, and y is a molar ratio of M and Al and is more than zero and smaller than or equal to 1*10<-2>. The invention also discloses a preparation method of the meal nano particle-doped rare earth lanthanum aluminate light-emitting material. The rare earth lanthanum aluminate light-emitting material prepared by doping the metal nano particle has the advantages of high stability and better light-emitting performance. The preparation method of the invention has simple process, low equipment requirement, no pollution and easy control and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a rare earth lanthanum aluminate luminescent material, in particular to a rare earth lanthanum aluminate luminescent material doped with metal nanoparticles. The invention also relates to a preparation method of a rare earth lanthanum aluminate luminescent material doped with metal nanoparticles. Background technique [0002] In recent years, field emission devices have attracted much attention due to their advantages such as low operating voltage, low power consumption, no need for deflection coils, no X-ray radiation, and resistance to radiation and magnetic field interference. The combination of field emission cathodes and luminescent materials can obtain high brightness, Field emission light source with high color rendering; therefore, the field emission light source is being used in instrument display, signal indication, general lighting and other fields. [0003] One of the key factors in the preparation of field emissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/87C09K11/80
Inventor 周明杰王荣马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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