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Surface treatment method of aluminate phosphor powder based on atomic layer deposition technology and phosphor powder prepared therefrom

An atomic layer deposition and surface treatment technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of thermal degradation of phosphors, affecting product performance and service life, etc., to reduce defects, improve luminous intensity and thermal stability. , the effect of convenient operation

Active Publication Date: 2016-06-22
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical scheme successfully prepared the blue-green phosphor SrMgAl 10 o 17 : Eu 2+ ,Mn 2+ , but in the process of use, the phosphor will be seriously deteriorated due to high temperature, which will affect the performance and service life of the product

Method used

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  • Surface treatment method of aluminate phosphor powder based on atomic layer deposition technology and phosphor powder prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Preparation of SrMgAl 10 o 17 : Eu 2+ SiO 2 Phosphor powder, wherein the doping concentration of europium is 1%, and the number of atomic layer deposition surface coating cycles is 100 times.

[0026] The first step, preparation of SrMgAl by combustion method 10 o 17 : Eu 2+ Core, the specific process is as follows: Accurately weigh 0.0035gEu 2 o 3 , 0.4190gSr(NO 3 ) 2 , 0.5128gMg(NO 3 ) 2 ·6H 2 O, 7.5027gAl(NO 3 ) 3 9H 2 O, put 0.006g of boric acid and 6g of urea in a mortar, grind them thoroughly, mix the reagents evenly, and obtain a viscous paste; transfer the viscous paste into a crucible, and then place it in a muffle furnace at 600°C for combustion reaction for 1.5min , take it out after holding for 5min, cool and grind to get SrMgAl 10 o 17 : Eu 2+ core.

[0027] The second step is to coat and form SiO by atomic layer deposition 2 film, the specific process is as follows: (1) the above-mentioned SrMgAl 10 o 17 : Eu 2+ The cor...

Embodiment 2

[0029] Embodiment 2: prepare SrMgAl 10 o 17 : Eu 2+ SiO 2 Phosphor powder, wherein the doping concentration of europium is 3%, and the number of atomic layer deposition surface coating cycles is 200 times.

[0030] The first step, preparation of SrMgAl by combustion method 10 o 17 : Eu 2+ Core, the specific process is as follows: Accurately weigh 0.0106gEu 2 o 3 , 0.4106gSr(NO 3 ) 2 , 0.5128gMg(NO 3 ) 2 ·6H 2 O, 7.5027gAl(NO 3 ) 3 9H 2 O, put 0.006g of boric acid and 6g of urea in a mortar, grind them thoroughly, mix the reagents evenly, and obtain a viscous paste; transfer the viscous paste into a crucible, and then place it in a muffle furnace at 600°C for combustion reaction for 1min. Take it out after 5 minutes of heat preservation, cool and grind to get SrMgAl 10 o 17 : Eu 2+ core.

[0031] The second step is to coat and form SiO by atomic layer deposition 2 film, the specific process is as follows: (1) the above-mentioned SrMgAl 10 o 17 : Eu 2+ The...

Embodiment 3

[0032] Embodiment 3: prepare SrMgAl 10 o 17 : Eu 2+ SiO 2 Phosphor powder, wherein the doping concentration of europium is 7%, and the number of atomic layer deposition surface coating cycles is 400 times.

[0033] The first step, preparation of SrMgAl by combustion method 10 o 17 : Eu 2+ Core, the specific process is as follows: Accurately weigh 0.0246gEu 2 o 3 , 0.3936gSr(NO 3 ) 2 , 0.5128gMg(NO 3 ) 2 ·6H 2 O, 7.5027gAl(NO 3 ) 3 9H 2 O, 0.006g of boric acid and 6g of urea were placed in a mortar, fully ground, and the reagents were mixed evenly to obtain a viscous paste; the viscous paste was transferred into a crucible, and then placed in a muffle furnace at 600°C for a combustion reaction for 2 minutes. Take it out after 5 minutes of heat preservation, cool and grind to get SrMgAl 10 o 17 : Eu 2+ core.

[0034] The second step is to coat and form SiO by atomic layer deposition 2 film, the specific process is as follows: (1) the above-mentioned SrMgAl 1...

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Abstract

The invention belongs to the field of fluorescent powder preparation, and discloses a surface treatment method of aluminate fluorescent powder based on atomic layer deposition technology and the prepared SiO2-coated aluminate fluorescent powder. The method adopts atomic layer deposition technology, and coats SiO2 film on the surface of fluorescent powder prepared by combustion method to improve the luminous performance of fluorescent powder. Prepare SrMgAl10O17 by combustion method: Mn2+, Eu2+, Eu2+, Mn2+, Eu2+, Er3+ core, rare earth ion doping is 1%-11%, surface coating is carried out by atomic layer deposition method, and the number of coating cycles is 100-600 times. Under the excitation of ultraviolet light, compared with the uncoated phosphor, the phosphor powder coated with SiO2 film has greatly improved luminous intensity and thermal stability, and has the advantages of high coating precision, simple process, no pollution, It has the advantages of less energy consumption and high efficiency, and is easy to realize industrialization.

Description

technical field [0001] The invention relates to the field of aluminate phosphor and its preparation, in particular to a method for coating the surface of aluminate phosphor by atomic layer deposition technology and SiO prepared therefrom 2 Encapsulated aluminate phosphor. Background technique [0002] SrMgAl 10 o 17 :Mn 2+ / Eu 2+ ,Mn 2+ / Eu 2+ ,Er 3+ Because of its high quenching temperature and stable chemical properties, it has attracted the attention of researchers. In the fields of PDP display devices and white light LEDs, this type of phosphor has certain potential, but during use, due to high temperature, the phosphor will undergo serious thermal degradation, which affects the performance and service life of the product. Surface coating of the phosphor powder can improve the thermal stability of the phosphor powder, because the coating makes the surface activity more stable, and the surface modification also improves the luminescence performance of the phosphor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/64
Inventor 王乐李旸晖陈如标张宏刘丹沈晔罗东徐国堂
Owner CHINA JILIANG UNIV