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Red up-conversion material of oxyfluoride and preparation method thereof

A technology of oxyfluoride and conversion materials, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of inconvenient large-scale production, harsh preparation conditions, low color purity, etc., achieve good up-conversion performance, reduce calcination temperature, The effect of increasing the luminous intensity

Inactive Publication Date: 2013-12-18
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the development of up-conversion materials, the luminous efficiency of green up-conversion materials is relatively high, while red up-conversion materials not only have fewer varieties, but also have low efficiency and low color purity.
[0005] Chinese patent CN101195747A discloses a red up-conversion phosphor NaY prepared under hydrothermal conditions of 180-220°C 1-x-y-z (Yb x Ho y Ce z ) F 4 method, the hydrothermal method used has a long production cycle and high safety management requirements, so the production cost is high, and the red light emission is enhanced through the quenching effect of Ce, which will cause the overall luminous intensity to decrease
[0006] Chinese patent CN101457143A discloses a method for preparing red up-conversion phosphors by combustion method, which is not convenient for large-scale production and seriously pollutes the environment
[0007] To sum up, the existing preparation technology of red up-conversion luminescent materials, or the preparation conditions are relatively harsh, or the production cost is high, or the environmental pollution is serious, or it is not easy to produce on a large scale, and new formulations and process technologies are urgently needed way

Method used

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  • Red up-conversion material of oxyfluoride and preparation method thereof
  • Red up-conversion material of oxyfluoride and preparation method thereof
  • Red up-conversion material of oxyfluoride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 4.7309g of YCl 3 ·6H 2 O, 1.55gYbCl 3 ·6H 2 O, 0.1527gErCl 3 ·6H 2 O was dissolved in 50g of deionized water, stirred to make it fully dissolved, and a transparent mixed solution of Y, Yb and Er was obtained;

[0040] (2) Dissolve 2.3718g of ammonium bicarbonate solid in 30g of deionized water to obtain a transparent ammonium bicarbonate solution;

[0041] (3) Add the ammonium bicarbonate solution to the mixed solution of Y, Yb and Er under stirring conditions, age for 1 hour, and obtain a slurry after slow reaction;

[0042] (4) Filter the slurry obtained above, collect the precipitate, wash the precipitate with deionized water for 2 to 3 times, and dry at 80°C for 10 hours to obtain a white powder;

[0043] (5) Put the white powder in a muffle furnace for calcination, the calcination temperature is 1200°C, the calcination time is 3h, and a white solid is obtained;

[0044] (6) Mix and grind the white solid with 0.0415g of lithium fluoride and 1.1408g of...

Embodiment 2

[0049] (1) 2.9113g of YCl 3 ·6H 2 O, 3.8749gYbCl 3 ·6H 2 O, 0.1527gErCl 3 ·6H 2 O was dissolved in 50g of deionized water, stirred to make it fully dissolved, and a transparent mixed solution of Y, Yb and Er was obtained;

[0050] (2) Dissolve 2.8824g of ammonium carbonate solid in 30g of deionized water to obtain a transparent ammonium carbonate solution;

[0051] (3) Add the ammonium carbonate solution to the mixed solution of Y, Yb and Er under stirring conditions, age for 1 hour, and obtain a slurry after slow reaction;

[0052] (4) Filter the slurry obtained above, collect the precipitate, wash the precipitate with ethanol for 2 to 3 times, and dry at 80°C for 10 hours to obtain a white powder;

[0053] (5) Put the white powder in a muffle furnace for calcination, the calcination temperature is 1100°C, and the calcination time is 3 hours to obtain a white solid;

[0054] (6) Mix and grind the white solid with 0.0415g lithium fluoride and 1.4816g ammonium fluoride t...

Embodiment 3

[0058] (1) 5.398g of YCl 3 ·6H 2 O, 0.775gYbCl 3 ·6H 2 O, 0.0763gErCl 3 ·6H 2 O was dissolved in 50g of deionized water, stirred to make it fully dissolved, and a transparent mixed solution of Y, Yb and Er was obtained;

[0059] (2) Dissolve 2.3718g of ammonium bicarbonate solid in 30g of deionized water to obtain a transparent ammonium bicarbonate solution;

[0060] (3) Add the ammonium bicarbonate solution to the mixed solution of Y, Yb and Er under stirring conditions, age for 1 hour, and obtain a slurry after slow reaction;

[0061] (4) Filter the slurry obtained above, collect the precipitate, wash the precipitate with deionized water for 2 to 3 times, and dry at 100°C for 8 hours to obtain a white powder;

[0062] (5) Put the white powder in a muffle furnace for calcination, the calcination temperature is 1000°C, and the calcination time is 4h to obtain a white solid;

[0063] (6) Mix and grind the white solid with 0.0415g lithium fluoride and 0.5704g ammonium bif...

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Abstract

The invention relates to a red up-conversion material of oxyfluoride and a preparation method thereof. The molecular formula of the red up-conversion material of oxyfluoride is Y(5-x-y)YbxEryO4F7, wherein 0.5<=x<=2.5, and 0.05<=y<=0.25; lithium-containing compounds such as Li2CO3 and LiF are used as a fluxing agent and a spectrum regulator. The red up-conversion material of oxyfluoride provided by the invention has the advantages of stable performance, high strength, pure chroma and the like; under the 980nm laser excitation, the material can realize red up-conversion luminescence and make up for the shortcomings of few colors and varieties of the up-conversion luminous material, thereby having a good application prospect in the fields of three-dimensional display, anti-counterfeiting, medicine, high-density data storage and the like; moreover, the preparation process is finished in an air atmosphere without needing special atmosphere protection, thereby greatly reducing the production difficulty and cost and being suitable for large-scale production.

Description

technical field [0001] The invention relates to an oxyfluoride red up-conversion material and a preparation method thereof. Background technique [0002] Red up-conversion material is a fluorescent material that can convert near-infrared light into visible light. It is characterized by the fact that the emitted photon energy is greater than the absorbed photon energy, which is an anti-Stokes phenomenon. Red up-conversion materials are widely used, mainly in the fields of three-dimensional display, anti-counterfeiting, medicine and high-density data storage. [0003] Among the rare earth ions, Er 3+ Because it can be effectively excited by 808nm and 980nm infrared light, it is often used as a luminescent center in up-conversion luminescent materials. while Yb 3+ It can effectively increase the absorption area of ​​the up-conversion luminescent material to 980nm infrared light and improve the efficiency of the up-conversion, and is an ideal sensitizer. In the selection of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/86
Inventor 阳效良周碧遥向志锋刘小海文晴肖思国
Owner XIANGTAN UNIV
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