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Fluorophosphate-based blue fluorescent powder and preparation method and application thereof

A technology of blue phosphors and fluorophosphates, applied in the field of fluorescent materials, can solve problems such as waste of energy production process, and achieve the effects of remarkable luminous efficiency, good crystalline properties, and rich sources of raw materials

Inactive Publication Date: 2015-04-08
宿迁研美生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The current industrially produced blue phosphor is BaMgAl 10 O 17 :Eu 2+ (referred to as BAM), mainly adopts high-temperature solid-phase synthesis method, and the synthesis temperature is above 1500°C, which wastes energy and requires a high production process.

Method used

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  • Fluorophosphate-based blue fluorescent powder and preparation method and application thereof
  • Fluorophosphate-based blue fluorescent powder and preparation method and application thereof
  • Fluorophosphate-based blue fluorescent powder and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: prepare Na 5 Al(PO 4 ) 2 F 2 :0.0001Eu 2+ ；

[0039] According to the chemical formula Na 5 Al(PO 4 ) 2 F 2 :0.0001Eu 2+ , respectively weighed sodium carbonate Na 2 CO 3 : 1.59 g, aluminum oxide Al 2 O 3 : 0.51 g, ammonium dihydrogen phosphate NH 4 H 2 PO 4 : 2.26 g, europium oxide Eu 2 O 3 : 0.0018 grams, sodium fluoride NaF: 0.84 grams, after grinding and mixing in an agate mortar, select the air atmosphere for pre-calcination, the calcination temperature is 400 ° C, the calcination time is 7 hours, then cooled to room temperature, and the sample is taken out; The raw materials calcined for the first time were fully mixed and ground evenly again, and then calcined for the second time in an air atmosphere, the calcining temperature was 550°C, and the calcining time was 12 hours, then cooled to room temperature, and the sample was taken out; fully ground again and placed in a muf...

Embodiment 2

[0044] Embodiment 2: prepare Na 5 Al(PO 4 ) 2 F 2 :0.05Eu 2+ ；

[0045] According to the chemical formula Na 5 Al(PO 4 ) 2 F 2 :0.05Eu 2+ , respectively weighed sodium sulfate Na 2 SO 4 : 1.9534 g, aluminum hydroxide Al(OH) 3 : 0.78 g, phosphorus pentoxide P 2 O 5 : 1.4194 g, europium sulfate Eu 2 (SO 4 ) 3 - H 2 O: 0.7402 grams, sodium fluoride NaF: 2.52 grams, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for pre-calcination, the calcination temperature is 425 ° C, the calcination time is 8 hours, then cool to room temperature, and take out the sample; The raw materials calcined for the first time were thoroughly mixed and ground evenly, and then calcined for the second time in an air atmosphere, the calcining temperature was 500°C, and the calcining time was 11 hours, then cooled to room temperature, the sample was taken out, fully ground again and placed in a muffle furnac...

Embodiment 3

[0046] Embodiment 3: prepare Li 5 Al(PO 4 ) 2 F 2 :0.1Eu 2+ ；

[0047] According to the chemical formula Li 5 Al(PO 4 ) 2 F 2 :0.1Eu 2+ , Weigh lithium carbonate Li respectively 2 CO 3 : 0.9237 g, aluminum oxide Al 2 O 3 : 0.51 g, ammonium dihydrogen phosphate NH 4 H 2 PO 4 : 2.26 g, europium nitrate Eu (NO 3 ) 3 -6 H 2 O: 2.2303 grams, lithium fluoride LiF: 1.5564 grams, after grinding and mixing uniformly in an agate mortar, select the air atmosphere for pre-calcination, the calcination temperature is 450 ° C, the calcination time is 8 hours, then cool to room temperature, and take out the sample; Fully grind again and place in a muffle furnace, calcining in a carbon powder reducing atmosphere, the calcining temperature is 800°C, and the calcining time is 12 hours, and the powdery fluorophosphate-based blue phosphor is obtained. Its main structural properties, excitation spectrum, luminescence spectrum and...

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Abstract

The invention discloses fluorophosphate-based blue fluorescent powder which is characterized by emitting blue fluorescence with wavelength of 420-470nm under the excitation of 300-360nm ultraviolet light, wherein the chemical formula is R5Al(PO4)2F2:xEu<2+>; R is one of Li, Na and K; x is the mole percent coefficient of Eu<2+> replacing R<+> and 0.0001<=x<=0.15. The fluorophosphate-based blue fluorescent powder disclosed by the invention has the advantages that the degree of crystallinity is high, the luminous efficiency is remarkable, and the preparation method is simple and environment-friendly; and meanwhile, the fluorophosphate-based blue fluorescent powder also can be applied to various kinds of illumination display taking ultraviolet light as an excitation source, as well as photoluminescence chrominance adjustment.

Description

technical field [0001] The invention relates to a fluorescent material, in particular to a fluorophosphate-based blue fluorescent powder, a preparation method and an application. Background technique [0002] As we all know, white light LED (Light Emitting Diode, LED) has the advantages of low power consumption, long life, environmental protection, fast response and so on. With the improvement of luminous efficiency and the reduction of production cost, LED is recognized as a new light source in the 21st century, and it is the fourth generation of light source after incandescent lamps, fluorescent lamps, and high-intensity gas discharge lamps. At present, there are three main ways to realize white light LED lighting: light conversion type, multi-color combination type and multi-quantum type. Among them, the light conversion method of using LED to excite phosphor to emit light to form mixed white light LED is the current mainstream technology, which has been reported The hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/72H01L33/50
Inventor 黄彦林秦琳关莹陶正旭魏东磊
Owner 宿迁研美生物科技有限公司