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A kind of strontium aluminate luminescent material and preparation method thereof

A luminescent material, strontium aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of limiting the application of field emission light sources and low luminous efficiency of cathode rays, and achieve improved luminous efficiency, less harsh process conditions, and high quality high effect

Active Publication Date: 2016-07-13
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

[0003] Strontium aluminate has very good chemical stability and thermal stability, and has potential application value in the application field of luminescent materials, but its low efficiency in cathode ray luminescence limits its application in field emission light sources

Method used

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  • A kind of strontium aluminate luminescent material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Preparation of Sr by sol-gel method 3.9 (Al 0.8 In 0.2 ) 12 o 25 :Eu 0.1 ,Pd 1×10ˉ5 :

[0031] 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 solution of palladium chloride under a magnetic stirring environment; 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 10mL1×10 -4 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.

[0032] Weigh 0.8021gSr(CH 3 COO) 2 , 1.9590gAl(CH 3 COO) 3 , 0.7007gIn(CH 3 COO) 3 and 0.0329gEu(CH 3 COO) 3 Put it in a container, then add 50mL of a mixed soluti...

Embodiment 2

[0035] Preparation of Sr by sol-gel method 3.8 (Al 0.9 In 0.1 ) 12 o 25 :Eu 0.2 ,Au 1×10ˉ2 :

[0036] Preparation of Au nanoparticle sol: Weigh 82.4 mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) Dissolve in 20mL of deionized water; when the chloroauric acid is completely dissolved, weigh 28mg of sodium citrate and 12mg of cetyltrimethylammonium bromide, and dissolve them into the aqueous solution of chloroauric acid under magnetic stirring Medium; Weigh 7.6mg of sodium borohydride and 35.2mg of ascorbic acid and dissolve them in 20mL of deionized water respectively to obtain a 20mL concentration of 1×10 -2 mol / L sodium borohydride aqueous solution and 20mL concentration is 1×10 -2 mol / L ascorbic acid aqueous solution; in the environment of magnetic stirring, first add 10mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir and react for 5 minutes, then add 10mL1×10 -2 mol / L ascorbic acid aqueous solution, and then continue to react for 3...

Embodiment 3

[0040] Preparation of Sr by sol-gel method 3.95 (Al 0.95 In 0.05 ) 12 o 25 :Eu 0.05 , Ag 2.5×10ˉ4 :

[0041] Preparation of Ag nanoparticles sol: weigh 3.4 mg silver nitrate (AgNO 3 ) into 18.4mL of deionized water; when the silver nitrate is completely dissolved, weigh 42mg of sodium citrate and dissolve it in the silver nitrate aqueous solution under magnetic stirring; weigh 5.7mg of sodium borohydride and dissolve it in 10mL of deionized water, Obtain 10mL concentration as 1.5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, add 1.6mL1.5×10 -2 mol / L sodium borohydride aqueous solution, and then continue to react for 10min to obtain 20mL of Ag content of 1×10 -3 mol / L of Ag nanoparticles sol.

[0042] Weigh 0.8359gSr(NO 3 ) 2 , 2.4281gAl(NO 3 ) 3 , 0.1805gIn(NO 3 ) 3 and 0.0169gEu(NO 3 ) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 8:1, add 7.6848g of citri...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a strontium aluminate luminescent material and a preparation method thereof. The general chemical formula of the luminescent material is Sr 4-x (Al 1-y In y ) 12 o 25 :Eu x , M z , wherein, M is at least one of Ag, Au, Pt, Pd, Cu metal nanoparticles, the value range of x is 0<x≤0.2, the value range of y is 0<y≤0.2, and the value range of z is 0<z≤1×10 -2 . The strontium aluminate luminescent material of the present invention, due to the introduction of In and M metal particles, enhances the luminescence of phosphor powder by doping In and doping metal nanoparticles, so that the luminous efficiency of the strontium aluminate luminescent material under the same excitation conditions is greatly improved. Big improvement.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a strontium aluminate luminescent material and a preparation method thereof. Background technique [0002] Field Emission Display (FED) is a flat panel display technology with great development potential. The working voltage of the field emission display device is lower than that of the cathode ray tube (CRT), usually less than 5kV, but the working current density is relatively large, generally in the range of 10-100μA·cm -2 . Therefore, the requirements for luminescent powders used in field emission displays are higher, such as better chromaticity, higher luminous efficiency at low voltages, and no brightness saturation at high current densities. At present, the research on luminescent powder for field emission display mainly focuses on two aspects: one is to use and improve the existing luminescent powder for cathode ray tube; the other is to search for new luminescent materials. Th...

Claims

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Application Information

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