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Lanthanum calcium gallate luminescent material and preparation method thereof

A luminescent material, the technology of lanthanum gallate, applied in the field of luminescent materials, can solve the problems of low luminous efficiency, uneven brightness, poor light color purity, etc., and achieve the effect of high quality, high color purity and brightness, and low cost

Active Publication Date: 2014-06-11
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

These phosphors, that is, luminescent materials, have poor light color purity and uneven brightness, and low luminous efficiency.

Method used

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  • Lanthanum calcium gallate luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: CaLa 0.9 Ga 3 o 7 : Dy 0.1 3+ @Pd 1×10-5 :

[0026] Preparation of Pd nanoparticle sol: Weigh 0.22 mg palladium chloride (PdCl 2 2H 2 O) Dissolved in 10mL of deionized water; when the palladium chloride was completely dissolved, weigh 11.0mg of sodium citrate and 4.0mg of sodium lauryl sulfate, and dissolve them in an aqueous palladium chloride solution under magnetic stirring; Weigh 0.38mg sodium borohydride and dissolve it in 100mL deionized water to obtain a concentration of 1×10 -4 mol / L sodium borohydride reducing solution; in the environment of magnetic stirring, quickly add 10mL 1×10 -4 mol / L sodium borohydride aqueous solution, and then continue to react for 20min to obtain 20mL Pd content of 5×10 -5 mol / L Pd nanoparticle sol;

[0027] Weigh 6.005g of glucose and dissolve it in absolute ethanol, then add 4mL of Pd nanoparticle sol to make the solution volume 40mL, then transfer the solution into a 50mL reaction kettle with a polytetrafluoroe...

Embodiment 2

[0030] Example 2: CaLa 0.999 Ga 3 o 7 : Dy 0.001 3+ @Au 1×10-2

[0031] Preparation of Au nanoparticle sol: Weigh 41.2 mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) Dissolve in 10mL of deionized water; when the chloroauric acid is completely dissolved, weigh 14mg of sodium citrate and 6mg of cetyltrimethylammonium bromide, and dissolve them into the chloroauric acid aqueous solution under magnetic stirring Medium; Weigh 3.8mg of sodium borohydride and 17.6mg of ascorbic acid and dissolve them in 10mL deionized water respectively to obtain 10mL concentration of 1×10 -2 mol / L sodium borohydride aqueous solution and 10mL concentration is 1×10 -2 mol / L ascorbic acid aqueous solution; in the environment of magnetic stirring, first add 5mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir and react for 5min, then add 5mL1×10 -2 mol / L ascorbic acid aqueous solution, and then continue to react for 30min to obtain 20mL Au content of 5×10 -3 mol / ...

Embodiment 3

[0035] Example 3: CaLa 0.8 Ga 3 o 7 : Dy 0.2 3+ @Pt 5×10-3 :

[0036] Preparation of Pt nanoparticle sol: Weigh 25.9 mg of chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) Dissolved in 17mL of deionized water; when the chloroplatinic acid was completely dissolved, weigh 400mg of sodium citrate and 600mg of sodium dodecylsulfonate, and dissolve them in the aqueous solution of chloroplatinic acid under magnetic stirring; weigh Dissolve 1.9 mg of sodium borohydride into 10 mL of deionized water to obtain a concentration of 5×10 in 10 mL -3 mol / L sodium borohydride aqueous solution, while preparing 10mL concentration of 5×10 -2 mol / L hydrazine hydrate solution; in the environment of magnetic stirring, first drop 0.4mL sodium borohydride aqueous solution into the chloroplatinic acid aqueous solution, stir for 5min, and then add 2.6mL 5×10 -2 mol / L hydrazine hydrate solution, and then continue to react for 40min to obtain 20mL Pt content of 2.5×10 -3 mol / L Pt nanoparticle sol.

...

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Abstract

The invention belongs to the field of luminescent materials and discloses a lanthanum calcium gallate luminescent material and a preparation method thereof. The lanthanum calcium gallate luminescent material has a general molecular formula of CaLa1-xGa3O7: Dy<3+>@My; and in the general molecular formula, M represents at least one of Ag, Au, Pt, Pd and Cu nanoparticles, @ represents coating, the M metal nanoparticle is used as a core, CaLa1-xGa3O7: Dy<3+> is used as a shell, x is >0 and <=0.2, and y is > 0 and <= 1*10<-2>. Through use of the M metal nanoparticles, the luminescence efficiency of the lanthanum calcium gallate luminescent material is greatly improved under the same excitation condition and emitted light wavelength is not changed. The lanthanum calcium gallate luminescent material has good luminescence performances and color purity and brightness of the excited emitted light are high.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a calcium lanthanum gallate luminescent material and a preparation method thereof. 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, high The color rendering field emission light source can be used in fields such as display, various indications, and general lighting. One of the key factors in the preparation of field emission devices with excellent performance is the preparation of high-performance phosphors. At present, the fluorescent materials used in field emission devices are mainly sulfide series, oxide series and sulfur oxide series phosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/87C09K11/80C09K11/02
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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