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A kind of mn4+ doped sodium hydrogen fluoride red light material and preparation method thereof

A technology of sodium hydrogen fluoride and red light, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of expensive raw materials and complicated synthesis methods, and achieve the effect of simple raw materials, pure red light and low cost

Active Publication Date: 2018-06-19
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese researchers synthesized a series of Mn 4+ Doped composite fluoride red light material and study its luminescent properties, but the synthesis method is more complicated, and the raw materials used are expensive (pure metal), and the concentration of the etching solution used is very high (40% HF aqueous solution), KMnO 4 High concentration (prone to non-luminescent by-products, such as MnO 2 )[S.Adachi,T.Takahashi,"A yellow phosphor K 2 SiF 6 activated by Mn 2+ ion", J.Appl.Phys.108(2010) 063506; R.Kasa, S.Adachi,"Mn‐activated K 2 ZrF 6 andNa 2 ZrF 6 Phosphors: Sharp red and oscillatory blue‐green emissions", J.Appl.Phys.112(2012) 013506.; S.Adachi, T.Takahashi, "Photoluminescence and Raman scattering spectroscopies of Ba SiF 6 :Mn 4+ red phosphor”, J.Appl.Phys.106(2009)013516.]

Method used

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  • A kind of mn4+ doped sodium hydrogen fluoride red light material and preparation method thereof
  • A kind of mn4+ doped sodium hydrogen fluoride red light material and preparation method thereof
  • A kind of mn4+ doped sodium hydrogen fluoride red light material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] In a plastic container, mix 0.1235g (5×10 ‐4 mol)K 2 MnF 6 Dissolve solid material in 20mL HF (concentration: wt40%), then add 2.1g (0.05mol) NaF as raw material, add deionized water to make the total volume 40mL, stir and react at room temperature for 1.5 hours, filter with suction, and dry naturally at room temperature , to obtain a white powder. The product glows red under a UV light. Its XRD (Bruker D8Advance X-ray diffractometer detection) such as figure 1 As shown, XRD shows that the product is pure NaHF 2 phase, slightly doped with Mn 4+ Did not significantly affect the phase. Such as figure 2 As shown, the energy spectrum analysis is measured on the Nova NanoSEM 200. Under the action of the electron beam, the energy spectrum analysis shows elements: Na, F and Mn, and H cannot be displayed because the mass is too small. It can be seen that the obtained product composition is NaHF 2 :Mn 4+ . Such as image 3 As shown, using Fluoromax‐4 fluorescence spe...

Embodiment 2

[0027] In a plastic container, mix 0.0988g (4×10 ‐4 mol)K 2 MnF 6 Dissolve the solid material in 30mL HF (concentration: wt40%), then add 0.42g (0.01mol) NaF as raw material, add deionized water to make the total volume 40mL, stir and react at room temperature for 0.5 hours, filter with suction, and dry naturally at room temperature , to obtain a white powder. The product glows red under a UV light. The XRD figure, scanning electron microscope picture and fluorescence spectrum of the white powder material and figure 1 ‐3 are basically the same.

Embodiment 3

[0029] In a plastic container, mix 0.1482g (6×10 ‐4 mol)K 2 MnF 6 Dissolve solid material in 15mL HF (concentration: wt40%), then add 3.36g (0.08mol) NaF as raw material, add deionized water to make the total volume 40mL, stir and react at room temperature for 1 hour, filter with suction, and dry naturally at room temperature , to obtain a white powder. The product glows red under a UV light. The XRD figure, scanning electron microscope picture and fluorescence spectrum of the white powder material and figure 1 ‐3 are basically the same.

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Abstract

The invention discloses a Mn4+ doped sodium hydrogen fluoride red light material and a preparation method thereof. The chemical composition of the material is NaHF2:Mn4+, with 15-30mL HF (concentration: wt 40%), 1×10‐4~9×10‐4mol K2MnF6 solid, 0.01~0.1mol NaF as raw materials, adding deionized water to make The total volume is 40 mL, stirred and reacted at room temperature for 0.5-2 hours, filtered with suction, and dried naturally at room temperature to obtain a white powder. The product emits bright red light under ultraviolet light, and its largest excitation band completely matches the blue light spectrum emitted by the white LED blue chip. Its emission spectrum consists of four red light emission peaks at 595-643nm. The material may be applied to dichroic white LEDs to improve their color rendering index. The product does not contain rare earth, has a simple preparation method and is suitable for industrial production.

Description

technical field [0001] The present invention relates to a luminescent material, in particular to a red light material which can be used in a white light LED and a preparation method thereof; in particular to a Mn material with an excitation wavelength in the blue light region and an emission wavelength in the red light region 4+ Doped sodium hydrogen fluoride luminescent material and its preparation method. Background technique [0002] White light LED is the fourth generation of light source after incandescent lamp and fluorescent lamp, and is recognized as a new light source in the 21st century. Because of its advantages of high efficiency, energy saving, environmental protection, long life and small size, it is widely used in various fields such as lighting, communication and display. It not only provides a perfect backlight solution for manufacturers, but also provides economical and high-quality light sources for general lighting. Today's market-leading white LED produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/61
CPCC09K11/616
Inventor 潘跃晓席陆青刘桂潘鑫张磊孔亦楠
Owner WENZHOU UNIV
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