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A kind of borophosphate white fluorescent powder and its preparation method and application

A borophosphate and phosphor technology, applied in the field of phosphors, can solve the problem of high cost of white LEDs, and achieve the effects of cost reduction, strong luminescence performance and low price

Active Publication Date: 2022-01-18
YUNNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a borophosphate white fluorescent powder and its preparation method and application. The fluorescent powder solves the problem of high cost of the existing white light LED, and can directly emit white light under the excitation of near ultraviolet light, which improves the fluorescence efficiency. powder luminous efficiency, and reduce production costs

Method used

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  • A kind of borophosphate white fluorescent powder and its preparation method and application
  • A kind of borophosphate white fluorescent powder and its preparation method and application
  • A kind of borophosphate white fluorescent powder and its preparation method and application

Examples

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preparation example Construction

[0034] A preparation method of borophosphate white fluorescent powder, the method comprising:

[0035] (1) Will Li 2 CO 3 , anhydrous Na 2 CO 3 、H 3 BO 3 , NH 4 h 2 PO 4 and Dy 2 o 3 The powder is sintered at 300-450°C and kept warm to eliminate the gas and impurities generated during the reaction;

[0036] (2) After the heat preservation is over, sinter at 550-650°C and heat preservation. During the heat preservation process, repeat the process of taking out the powder and grinding it for several times;

[0037] (3) After the heat preservation is completed, cool and grind to obtain borophosphate white fluorescent powder.

[0038] Further, the method also includes: weighing Li 2 CO 3 , anhydrous Na 2 CO 3 、H 3 BO 3 , NH 4 h 2 PO 4 and Dy 2 o 3 , and grind to obtain a powder with uniform particles.

[0039] Further, in step (1), Li 2 CO 3 , anhydrous Na 2 CO 3 、H 3 BO 3 , NH 4 h 2 PO 4 and Dy 2 o 3The weight ratio is 0.369:0.262:0.309:1.150:0.0...

Embodiment 1

[0045] The preparation method is as follows:

[0046] (1) Weigh 0.369g Li respectively 2 CO 3 , 0.262g Na 2 CO 3 , 0.309g H 3 BO 3 , 1.150g NH 4 h 2 PO 4 , 0.009g Dy 2 o 3 , put all the raw materials in an agate mortar and grind quickly to prevent the NH 4 h 2 PO 4 Moisture agglomerates, fully grind until a uniform phase is obtained, transfer the fully ground mixture into a corundum crucible, place it in a resistance furnace, pre-sinter at 400°C, and keep it warm for 5 hours;

[0047] (2) Take out the sample and grind it again, sinter it at 600°C for 7 days, and grind it several times in the middle;

[0048] (3) The final sample is cooled with the furnace and ground to obtain Phosphor powder, such as figure 1 Shown, is the embodiment 1 of the present invention The XRD diffraction pattern.

[0049] Such as figure 2 Shown, is the Li of the embodiment 1 of the present invention 2 Na 0.99 BP 2 o 8 : Dy 0.01 The excitation spectrum obtained under the mon...

Embodiment 2

[0053] The preparation method is basically the same as in Example 1, and the difference is that the amount of each raw material is different, and the specific amount of raw material is Li 2 CO 3 : 0.369g, Na 2 CO 3 : 0.264g, H 3 BO 3 : 0.309g, NH 4 h 2 PO 4 : 1.150g, Dy 2 o 3 : 0.005g.

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Abstract

The invention discloses a borophosphate white fluorescent powder and its preparation method and application. The chemical formula of the fluorescent powder is 0.005≤x≤0.05. The borophosphate white fluorescent powder of the present invention is a borophosphate white fluorescent powder that can be excited by near-ultraviolet light, can be excited by a near-ultraviolet LED chip to realize white light, and is used as a fluorescent powder that outputs white light.

Description

technical field [0001] The invention relates to a fluorescent powder, in particular to a borophosphate white fluorescent powder and a preparation method and application thereof. Background technique [0002] In recent years, with the acceleration of urbanization and the application of new-generation information technology such as the Internet, urban lighting has put forward higher requirements for artificial lighting technology. Intelligent lighting, healthy lighting and green lighting have become hot research directions. [0003] Due to its excellent controllability of light, color and electricity, LED has become a perfect choice for green lighting sources. As a new type of solid-state lighting source, white LEDs have replaced incandescent LEDs due to their advantages such as energy saving, environmental protection, high luminous efficiency, high stability, low voltage, extremely fast response speed, small size, long life and strong designability. Lamps, fluorescent lamps,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71H01L33/50
CPCY02B20/00
Inventor 朱静向继云车毅杨美华周杨张卓辉葛鑫晨
Owner YUNNAN UNIV
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