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Mn<4+>-doped hexafluoride red fluorescent powder and synthesis method thereof

A technology of red phosphor and synthesis method, applied in the field of hexafluoride-doped Mn4+ red phosphor and synthesis

Active Publication Date: 2020-01-21
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the fluoride phosphor matrix synthesized by organic and inorganic substances

Method used

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  • Mn&lt;4+&gt;-doped hexafluoride red fluorescent powder and synthesis method thereof
  • Mn&lt;4+&gt;-doped hexafluoride red fluorescent powder and synthesis method thereof
  • Mn&lt;4+&gt;-doped hexafluoride red fluorescent powder and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add hexafluorosilicic acid to 2.5mL hydrofluoric acid solution (40% wt), then add 0.03g potassium hexafluoromanganate and stir for 30 minutes, and finally add 1.86g tetramethylammonium fluoride and continue stirring for 8 hours; the obtained precipitate Wash each 3 times with glacial acetic acid and absolute ethanol, and finally place the product in a vacuum oven and dry it for 12 hours, and the orange-yellow powder obtained is the final product [(CH 3 ) 4 N] 2 Si 1-x f 6 :xMn 4+ .

[0025] attached figure 1 for [(CH 3 ) 4 N] 2 Si 1-x f 6 :xMn 4+ The XRD diffraction pattern of this sample shows that the powder diffraction peaks of this sample are a series of independent narrow peaks, indicating that the sample has good crystallinity.

[0026] attached figure 2Shown as [(CH 3 ) 4 N] 2 Si 1-x f 6 :xMn 4+ The scanning electron microscope picture of the sample particle size is 2-5 μm.

[0027] attached image 3 Shown are the room temperature excitation...

Embodiment 2

[0030] First add 0.13 g of germanium dioxide to 2.5 mL of hydrofluoric acid solution (40% wt), then add 0.03 g of potassium hexafluoromanganate and stir for 30 minutes, and finally add 1.86 g of tetramethylammonium fluoride and continue stirring for 8 hours; the resulting precipitate The product was washed 3 times with glacial acetic acid and absolute ethanol, and finally the product was placed in a vacuum drying oven for 12 hours, and the orange-yellow powder obtained was the final product [(CH 3 ) 4 N] 2 Ge 1-x f 6 :xMn 4+ .

[0031] attached Figure 5 for [(CH 3 ) 4 N] 2 Ge 1-x f 6 :xMn 4+ The XRD diffraction pattern of this sample shows that the powder diffraction peaks of this sample are a series of independent narrow peaks, indicating that the sample has good crystallinity.

[0032] attached Figure 6 Shown as [(CH 3 ) 4 N] 2 Ge 1-x f 6 :xMn 4+ The scanning electron microscope picture of the sample particle size is 5-10 μm.

[0033] attached Figure ...

Embodiment 3

[0036] First add 0.49mL hexafluorotitanic acid into 2.5mL hydrofluoric acid solution (40% wt), then add 0.03g potassium hexafluoromanganate and stir for 30 minutes, and finally add 0.93g tetramethylammonium fluoride and continue stirring for 8 hours; the obtained The precipitate was washed 3 times with glacial acetic acid and absolute ethanol, and finally the product was placed in a vacuum drying oven for 12 hours, and the orange-yellow powder obtained was the final product [(CH 3 ) 4 N] 2 Ti 1-x f 6 :xMn 4+ .

[0037] attached Figure 9 for [(CH 3 ) 4 N] 2 Ti 1-x f 6 :xMn 4+ The XRD diffraction pattern of this sample shows that the powder diffraction peaks of this sample are a series of independent narrow peaks, indicating that the sample has good crystallinity.

[0038] attached Figure 10 Shown as [(CH 3 ) 4 N] 2 Ti 1-x f 6 :xMn 4+ The scanning electron microscope picture of the sample particle size is 3-5 μm.

[0039] attached Figure 11 Shown are the ...

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Abstract

The invention relates to the field of inorganic functional materials, and discloses Mn<4+>-doped hexafluoride red fluorescent powder and a synthesis method thereof. The chemical composition of the Mn<4+>-doped hexafluoride red fluorescent powder is [(CH3)4N]2A<1-x>F6:xMn<4+>, wherein the x is the molar percentage coefficient of the correspondingly doped Mn<4+> ions relative to the A<4+> ions, andthe x is greater than 0 and less than or equal to 0.10; the A is one of Si, Ge and Ti. The red light-emitting material disclosed by the invention is mainly used for emitting red light of about 630 nmunder the excitation of blue light, and is high in light-emitting efficiency. The preparation method of the red light-emitting material is a liquid phase method, is carried out at normal temperature,is simple in synthesis process, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a Mn-doped 4+ The hexafluoride red phosphor powder and its synthesis method, specifically, a hexafluoride-doped Mn that can be excited by a blue-light GaN-based light-emitting diode 4+ The invention discloses a red fluorescent powder and a synthesis method thereof, belonging to the field of synthesis of inorganic functional materials. Background technique [0002] White light semiconductor solid-state lighting has been widely used in people's daily life due to its advantages of energy saving, environmental protection, and long service life. The traditional semiconductor lighting source is through the commercial yellow phosphor Y 3 Al 5 o 12 : Ce 3+ It is combined with a semiconductor chip that emits blue light. Due to the yellow phosphor Y 3 Al 5 o 12 : Ce 3+ The red light emission component is low, resulting in low color temperature and low color rendering index of this lighting source, which is not conducive to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/61C09K11/66C09K11/67
CPCC09K11/06C09K11/615C09K11/664C09K11/674
Inventor 汪正良陈宇周强王凯民唐怀军罗利军郭俊明
Owner YUNNAN MINZU UNIV
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