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Metal nanoparticle-doped columbate luminescent material and preparation method thereof

A technology of metal nanoparticles and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of reducing the luminous efficiency of phosphors, shortening the service life, low luminous efficiency, etc., and achieving the process conditions are not harsh, easy to achieve, high quality effects

Inactive Publication Date: 2014-09-24
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For sulfide phosphors, the luminous brightness is high and has certain conductivity, but the stability is poor, and it is easy to decompose and produce under the bombardment of low-voltage and high-current electron beams. The sulfur produced by the decomposition has a "poison" effect on the cathode emitter. The generated precipitate covers the surface of the phosphor powder, which reduces the luminous efficiency of the phosphor powder and shortens the service life of the FED
Oxide phosphors have good stability, but the luminous efficiency is relatively low, and the performance of both needs to be improved and improved

Method used

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  • Metal nanoparticle-doped columbate luminescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Gd by sol-gel method 1.98 CaNbO 7 :Eu 0.02 ,Pd 1×10 -5

[0030] Preparation of Pd-containing nanoparticle sol: Weigh 0.22 mg palladium chloride (PdCl 2 2H 2 O) be dissolved in the deionized water of 10mL; Under the condition of magnetic stirring, 11.0mg sodium citrate and 4.0mg sodium lauryl sulfate are dissolved in the above-mentioned palladium chloride solution; Weigh 0.38mg sodium borohydride and dissolve in 100mL deionized water to obtain a concentration of 1×10 -4 mol / L sodium borohydride solution; under the condition of magnetic stirring, quickly add 10mL of the above-mentioned sodium borohydride solution to the above-mentioned palladium chloride solution, react for 20min, and obtain 20mL of Pd nanoparticles with a concentration of 5×10 -5 mol / L of sol.

[0031] Weigh 33.2263gNb 2 o 5 And 14.0275g KOH uniform mixing, calcined at 350 ℃ for 2h to obtain soluble potassium niobate. Dissolve potassium niobate in distilled water, add nitric acid...

Embodiment 2

[0035] Preparation of Gd by sol-gel method 1.9 CaNbO 7 :Eu 0.1 , Ag 2.5×10 -4:

[0036] Preparation of Ag nanoparticles sol: weigh 3.4 mg silver nitrate (AgNO 3 ) was dissolved in 18.4mL of deionized water; under the condition of magnetic stirring, 42mg of sodium citrate was dissolved in the above silver nitrate solution; 5.7mg of sodium borohydride was weighed and dissolved in 10mL of deionized water to obtain a concentration of 1.5×10 -2 mol / L sodium borohydride solution; under the condition of magnetic stirring, add 1.6mL of the above-mentioned sodium borohydride solution to the above-mentioned silver nitrate solution at one time, and continue to react for 10min to obtain 20mL of Ag nanoparticles with a concentration of 1×10 -3 mol / L of sol.

[0037] Nb 5+ The preparation of oxalic acid solution is identical with embodiment 1.

[0038] Weigh 2.6088g Gd(NO 3 ) 3 , 0.9238g Sc (NO 3 ) 3 , 0.1352g Eu(NO 3 ) 3 and 4mL1mol / L prepared Nb 5+ Put the oxalic acid soluti...

Embodiment 3

[0043] Preparation of Gd by sol-gel method 1.5 CaNbO 7 :Eu 0.5 ,Pt 5×10 -3

[0044] Containing the preparation of Pt nanoparticle sol: take by weighing 25.9mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in 17mL of deionized water; under the condition of magnetic stirring, 400mg sodium citrate and 600mg sodium dodecylsulfonate are dissolved in the above-mentioned chloroplatinic acid solution; 1.9mg sodium borohydride is weighed and dissolved in 10mL deionized water to obtain a concentration of 5 x 10 -3 mol / L sodium borohydride solution; at the same time prepare 10mL concentration of 5×10 -2 mol / L hydrazine hydrate solution; under the condition of magnetic stirring, first add 0.4mL of the above-mentioned sodium borohydride solution dropwise to the above-mentioned chloroplatinic acid solution, after reacting for 5min, then add 2.6mL of the above-mentioned hydrazine hydrate solution to the above-mentioned chloroplatinic acid solution Hydrazine solution, continue...

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Abstract

The invention discloses a metal nanoparticle-doped columbate luminescent material and a preparation method thereof, belonging to the field of luminescent materials. The general chemical formula of the luminescent material is Gd2-xScNbO7:Eux,My, wherein M is at least one selected from metal nanoparticles consisting of Ag, Au, Pt, Pd and Cu, x is more than 0 and no more than 1.5, and y is the mol ratio of M to Gd2-xScNbO7:Eux and is more than 0 and no more than 1 * 10<-2>. In the metal nanoparticle-doped columbate luminescent material, the M metal particle is introduced, so the columbate luminescent material has greatly improved luminous efficiency under same excitation conditions, the wavelength of emitted light is not changed, color purity and luminance of light emitted under excitation are high, and the columbate luminescent material can be applied to field emission devices.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a niobate luminescent material doped with metal nanoparticles and a preparation method. Background technique [0002] A field emission display is a new type of flat panel display, and its working principle is similar to that of a CRT. One of the key factors to prepare FED with good performance is the preparation of phosphor powder. At present, most of the phosphors used in FED are based on the traditional phosphors used in CRT and improved. The phosphors used are mainly sulfides and oxides. For sulfide phosphors, the luminous brightness is high and has certain conductivity, but the stability is poor, and it is easy to decompose and produce under the bombardment of low-voltage and high-current electron beams. The sulfur produced by the decomposition has a "poison" effect on the cathode emitter. The generated precipitate covers the surface of the phosphor powder, reduces the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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