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Light color adjustable borate fluorescent powder and preparation method thereof

A fluorescent powder and borate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high price and toxicity of lemon salt, and achieve the effect of wide excitation bandwidth and mild preparation conditions

Active Publication Date: 2017-06-23
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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  • Light color adjustable borate fluorescent powder and preparation method thereof
  • Light color adjustable borate fluorescent powder and preparation method thereof
  • Light color adjustable borate fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to Zn 4.9 Si(BO 3 ) 2 o 4 : 0.1Mn 2+ Weigh ZnO, SiO 2 、H 3 BO 3 and MnCO 3 , the molar ratio between them is 4.9:1:2:0.1. After fully grinding and mixing evenly, place it in a crucible, then bake in a high-temperature furnace at 1050°C for 2 hours under a nitrogen atmosphere, and then cool to room temperature to obtain borate fluorescence. pink.

[0021] figure 1 It is the phosphor powder body excitation spectrogram prepared in embodiment 1, monitoring wavelength 515 nanometers, from figure 1 It can be seen from the figure that the excitation spectrum of the phosphor powder in this embodiment is a broad spectrum, covering the ultraviolet, violet and blue light regions. Effective stimulation. figure 2 It is the emission spectrum figure of the fluorescent powder prepared in embodiment 1, and the excitation wavelength is 365 nanometers. When the excitation wavelength of the emission spectrum is 365 nm, from figure 2 It can be seen from the figure th...

Embodiment 2

[0023] According to Zn 5 Si 0.99 (BO 3 ) 2 o 4 : 0.01Mn 4+ Weigh ZnO, SiO 2 、H 3 BO 3 and MnO 2 , the molar ratio between them is 5:0.99:2:0.01. After fully grinding and mixing, place it in a crucible, then bake it in a high-temperature furnace at 1050°C for 2 hours under an argon atmosphere, and then cool it to room temperature to obtain borate fluorescence. pink.

[0024] image 3 It is the phosphor powder excitation spectrogram prepared in embodiment 2, and the monitoring wavelength is 665 nanometers, from image 3 It can be seen from the figure that the excitation spectrum of the phosphor powder in this embodiment is a broad spectrum, covering the ultraviolet, violet and blue light regions. Effective stimulation. Figure 4 It is the phosphor powder body emission spectrogram prepared in embodiment 2, excitation wavelength 435 nanometers, when the excitation wavelength of emission spectrum is 435nm, from Figure 4 It can be seen from the figure that the emission...

Embodiment 3

[0026] According to Zn 4.999 Si 0.999 (BO 3 ) 2 o 4 : 0.001Mn 2+ , 0.001Mn 4+ Weigh ZnO, SiO 2 、H 3 BO 3 , MnCO 3 and MnO 2 , the molar ratio between them is 4.999:0.999:2:0.001:0.001. After fully grinding and mixing, place it in a crucible, and then bake it in a nitrogen atmosphere at 850°C for 7 hours in a high-temperature furnace, and then cool it to room temperature to obtain boric acid Salt phosphor.

[0027] Figure 5 It is the emission spectrum figure of the fluorescent powder prepared in embodiment 3, and the excitation wavelength is 380 nanometers. When the excitation wavelength of the emission spectrum is 380 nm, from Figure 5 It can be seen from the figure that the emission of the phosphor powder in this embodiment has two emission bands, which are distributed in the green light and red light regions, and the peaks are respectively located at 515nm and 665nm, and its color coordinate value is (0.2844, 0.5517). area, indicating that the fluorescent powd...

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Abstract

The invention relates to the technical field of luminescent materials. Light color adjustable borate fluorescent powder has the following chemical expression: Zn5-xAl-y(BO3)2O4:xMn<2+> and yMn<4+>, wherein A is one of Si, Ge, Ti, Zr and Sn, x is 0-0.1, and y is 0-0.01. The fluorescent powder has the advantages that a light color can be adjusted by adjusting the specific value of the strength of two emission bands, and the light color can be adjusted from green light to red light.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a borate fluorescent powder with adjustable light color 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 ...

Claims

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Application Information

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IPC IPC(8): C09K11/63C09K11/66C09K11/67
CPCC09K11/636C09K11/667C09K11/678
Inventor 邓德刚阮枫萍吴程潇徐时清张军杰李晨霞华有杰柴文祥
Owner CHINA JILIANG UNIV
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