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A kind of zincate green fluorescent powder and preparation method thereof

A green phosphor, zincate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high price and toxicity of citron salt, and achieve the effect of wide excitation bandwidth and mild preparation conditions

Active Publication Date: 2019-08-20
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional phosphor materials mostly rely on activators or co-activators to emit light, and activators usually use rare earth elements, which are expensive and their oxides, chlorides, and citric salts are toxic. In addition, the preparation of phosphor materials often requires Harsh conditions such as high temperature reducing atmosphere

Method used

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  • A kind of zincate green fluorescent powder and preparation method thereof
  • A kind of zincate green fluorescent powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] According to Si 3 Zn 1.999 o 8 : 0.001Mn 2+ Weigh SiO 2 , ZnO and MnCO 3 , the molar ratio between them is 3:1.999:0.001, after fully grinding and mixing, place in a crucible, then bake in a high-temperature furnace at 950°C for 7 hours in a CO atmosphere, and then cool to room temperature to obtain zincate green phosphor .

[0017] figure 1 The excitation wavelength is 365 nm, figure 2 The monitoring wavelength is 536 nm. Such as figure 2 As shown, the excitation spectrum of the phosphor powder in this embodiment is a broad spectrum, covering the ultraviolet, violet and blue light regions, the excitation peak is located near 365nm, and the spectral peak is high, indicating that the phosphor powder of this embodiment can be effectively excited by the ultraviolet and violet light chips . When the excitation wavelength of the emission spectrum is 365nm, such as figure 1 As shown, the emission of the phosphor powder in this embodiment is broadband green light ...

Embodiment 2

[0019] According to Si 3 Zn 1.995 o 8 : 0.005Mn 2+ Weigh SiO 2 , ZnO and MnCO 3 , the molar ratio between them is 3:1.995:0.005, after fully grinding and mixing, place in a crucible, then bake in a high-temperature furnace at 1000°C for 5 hours in a CO atmosphere, and then cool to room temperature to obtain zincate green phosphor .

[0020] The excitation spectrum of the phosphor powder in this embodiment is a broad spectrum, covering the ultraviolet, violet and blue light regions. The excitation peak is located near 365nm, and the spectral peak is high, indicating that the phosphor powder of this embodiment can be effectively excited by the ultraviolet and violet light chips. When the excitation wavelength of the emission spectrum is 536nm, the emission of the phosphor powder in this embodiment is broadband green light emission, and the emission peak is located near 365nm, indicating that the phosphor powder of this embodiment is suitable for green phosphor excited by ul...

Embodiment 3

[0022] According to Si 3 Zn 1.99 o 8 : 0.01Mn 2+ Weigh SiO 2 , ZnO and MnCO 3 , the molar ratio between them is 3:1.99:0.01, after fully grinding and mixing, place it in a crucible, and put it in a high temperature furnace at 5% H 2 +95%N 2 (volume ratio) nitrogen-hydrogen mixed atmosphere, calcined at 1050° C. for 4 hours, and then cooled to room temperature to obtain zincate green phosphor.

[0023] The excitation spectrum of the phosphor powder in this embodiment is a broad spectrum, covering the ultraviolet, violet and blue light regions. The excitation peak is located near 365nm, and the spectral peak is high, indicating that the phosphor powder of this embodiment can be effectively excited by the ultraviolet and violet light chips. When the excitation wavelength of the emission spectrum is 536nm, the emission of the phosphor powder in this embodiment is broadband green light emission, and the emission peak is located near 365nm, indicating that the phosphor powder ...

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Abstract

The invention relates to the technical field of luminescent materials. A green zincate fluorescent powder has a chemical formula as follows M3Zn2-XO8: xMn2+, M is any one of Si, Ge, Ti, Zr, Sn and Te, and x is 0.001-0.1. The green zincate fluorescent powder has the advantage that more expensive rare earth elements are not contained, the powder has a wide excitation bandwidth having ultraviolet, violet light and blue light zones, emission peak overlapping with an ultraviolet chip is good, and the powder can be effectively excited.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to zincate green fluorescent powder and a preparation method thereof. Background technique [0002] White LED is a solid-state semiconductor device that converts electrical energy into white light, also known as semiconductor lighting. It has many advantages such as high efficiency, small size, long life, safety, low voltage, energy saving, and environmental protection. , Fluorescent lamps, and high-pressure gas discharge lamps are the fourth generation of lighting sources, which will be the mainstream products in the future lighting market. [0003] At present, there are various white light LED preparation methods, among which the combination of blue LED chip and yellow fluorescent material, combination of blue LED chip and red and green fluorescent material, and combination of purple LED chip and trichromatic fluorescent material are the three methods with low price....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59C09K11/66C09K11/67C09K11/88
Inventor 周柳艳邓德刚吴程潇阮枫萍俆时清王焕平华有杰柴文祥
Owner CHINA JILIANG UNIV
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