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Mn<4+>doped novel fluoride red fluorescent material and preparation method thereof

A technology of red fluorescence and fluoride, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of large particles, irregular shapes, and difficult to control the shape, and achieve the effect of uniform particle distribution, regular shape, and uniform distribution

Inactive Publication Date: 2018-06-22
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this type of phosphor (A 2 BF 6 :Mn 4+ ) are ubiquitous problems with difficult control of morphology, agglomeration, large particles (30 microns) and extremely irregularities, making it difficult to actually apply to devices. Only a very small number of phosphors undergo complicated post-processing or secondary modification improved appearance

Method used

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  • Mn&lt;4+&gt;doped novel fluoride red fluorescent material and preparation method thereof
  • Mn&lt;4+&gt;doped novel fluoride red fluorescent material and preparation method thereof
  • Mn&lt;4+&gt;doped novel fluoride red fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 40.5g KF powder and dissolve it in 100ml HF (40%) aqueous solution and stir well to form solution A; weigh 2.7g KMnO 4 Dissolve the powder in 100ml HF (40%) aqueous solution and stir well to form solution B; after mixing A and B solutions evenly, start adding H dropwise at a speed of 2ml / min 2 o 2 (17ml), let the solution stand still for 3min after the solution turns brownish yellow, and the obtained yellow precipitate is vacuum filtered, washed with acetone (99.9%) for 4 times, and dried at 75°C for 2 hours to obtain K 2 MnF 6 powder.

Embodiment 2

[0042] Weigh 24.0g KHF 2 Dissolve the powder in 75ml HF (40%) aqueous solution and stir well to form solution A; weigh 2.4g KMnO 4 Dissolve the powder in 75ml HF (40%) aqueous solution and stir well to form solution B; after mixing and stirring A and B solutions evenly, start adding H dropwise at a speed of 3ml / min 2 o 2 (8.5ml), let the solution stand still for 5min after the solution turned brownish yellow, and the obtained yellow precipitate was vacuum filtered, washed with acetone (99.9%) for 3 times, and dried at 100°C for 2 hours to obtain K 2 MnF 6 powder.

Embodiment 3

[0044] Weigh 31.2g KF and 24.8g KHF 2 Dissolve the powder in 150ml HF (40%) aqueous solution and stir well to form solution A; weigh 5.6g KMnO 4 Dissolve the powder in 150ml HF (40%) aqueous solution and stir well to form solution B; after mixing A and B solutions evenly, start to add H dropwise at a speed of 7.5ml / min 2 o 2 (23ml), let the solution stand still for 5min after the solution turned brownish yellow, and the obtained yellow precipitate was vacuum filtered, washed 5 times with acetone (99.9%), and dried at 85°C for 2 hours to obtain K 2 MnF 6 powder.

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Abstract

The invention discloses a Mn<4+>doped novel fluoride red fluorescent material and a preparation method thereof. The chemical formula of the material is AxB(y-z)F(x+3y):Mn<4+>z, wherein A represents one or two of Li, Rb and Cs; B represents one or two of Sc, Y, Gd, Al and Ga. The preparation method comprises the following steps: S1, dissolving one of fluoride and bifluoride of K in an HF aqueous solution to prepare a solution A, dissolving KMnO4 powder in an HF aqueous solution to prepare a solution B, mixing the solutions A and B, dropwise adding a H2O2 aqueous solution for precipitation, andperforming aging and drying to obtain a K2MnF6 precursor; S2, dissolving the K2MnF6 precursor in an HF aqueous solution to prepare a solution C; S3, dissolving one of fluoride, sulfate and hydroxide of A in an HF aqueous solution to prepare a solution D; S4, dissolving oxide powder of B in an HF aqueous solution to prepare a solution E; S5, uniformly stirring and mixing the solutions C and D, slowly adding a solution E, performing stirring until precipitate is produced, and performing aging and drying to obtain the Mn<4+>doped novel fluoride red fluorescent material.

Description

technical field [0001] The invention relates to the field of inorganic functional materials, in particular to a Mn 4+ Doped novel fluoride red fluorescent material and preparation method thereof. Background technique [0002] Since its inception, white light emitting diodes (White light emitting diodes) have entered the high-tech field at a rapid pace in recent years because of their advantages of high efficiency, environmental protection, energy saving, pollution-free and long life. They are known as incandescent lamps, fluorescent lamps, energy-saving A new generation of lighting sources after lamps. Currently, commercial "blue LED+YAG:Ce 3+ "White light, color rendition and color temperature produced by combined packaged WLEDs are all limited by the lack of red phosphor for further development. But this problem can be overcome by adding red phosphor to compensate for the red light component. Therefore a lot of research activities to New red phosphors were developed to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/62
CPCC09K11/628C09K11/7733C09K11/7773
Inventor 叶信宇明红吴迪潘锡翔刘丽丽彭家庆杜甫游维雄杨幼明
Owner JIANGXI UNIV OF SCI & TECH