Preparation method of high-luminous-efficiency fluorapatite complex-phase fluorescent ceramic material for LED/LD illumination

A technology using fluorapatite and fluorescent ceramics, applied in the directions of luminescent materials, chemical instruments and methods, can solve the problems that have not yet been developed, and can ensure the optical quality and luminescent performance of ceramics, short preparation period and good uniformity. Effect

Active Publication Date: 2020-04-17
XUZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the preparation method of Ce:YAG transparent ceramic material that satisfies hi...

Method used

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  • Preparation method of high-luminous-efficiency fluorapatite complex-phase fluorescent ceramic material for LED/LD illumination
  • Preparation method of high-luminous-efficiency fluorapatite complex-phase fluorescent ceramic material for LED/LD illumination
  • Preparation method of high-luminous-efficiency fluorapatite complex-phase fluorescent ceramic material for LED/LD illumination

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Experimental program
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Embodiment 1

[0038] A preparation method of fluoroapatite composite fluorescent ceramic material for LED / LD lighting with high light efficiency, the specific steps are as follows:

[0039] (1) According to molecular formula (Ce 0.001 Y 0.999 ) 3 al 5 o 12 The stoichiometric ratios of the corresponding elements were accurately weighed for Y with a purity of 99.999%. 2 o 3 Powder, 99.999% Al 2 o 3 Powder and 99.99% CeO 2 Powder, all three powder materials are dissolved in analytically pure nitric acid with a concentration of 14mol / L to form a powder containing Y 3+ 、Al 3+ 、Ce 3+ mother solution of ions, Y 3+ 、Al 3+ 、Ce 3+ The total molar weight of the three ions is the standard, and the mother liquor is diluted to 0.12mol / L; the analytically pure ammonium sulfate is added to the mother liquor as a dispersant, and its addition amount is Y 3+ 4mol% of the molar weight;

[0040] (2) Preparation of precipitant mixed solution: according to the molar ratio of 1:3, analytically pure ...

Embodiment 2

[0052] A preparation method of fluoroapatite composite fluorescent ceramic material for LED / LD lighting with high light efficiency, the specific steps are as follows:

[0053] (1) According to molecular formula (Ce 0.0005 Y 0.9995 ) 3 al 5 o 12 The stoichiometric ratios of the corresponding elements were accurately weighed for Y with a purity of 99.999%. 2 o 3 Powder, 99.999% Al 2 o 3 Powder and 99.99% CeO 2 Powder, all three powder materials are dissolved in analytically pure nitric acid with a concentration of 12mol / L to form a powder containing Y 3+ 、Al 3+ 、Ce 3+ mother solution of ions, Y 3+ 、Al 3+ 、Ce 3+ The total molar weight of the three ions is taken as the standard, and the mother liquor is diluted to 0.18mol / L; the analytically pure ammonium sulfate is added to the mother liquor as a dispersant, and its addition amount is Y 3+ 3mol% of the molar weight;

[0054] (2) Preparation of precipitant mixed solution: According to the molar ratio of 1:2.5, analy...

Embodiment 3

[0063] (1) According to molecular formula (Ce 0.006 Y 0.994 ) 3 al 5 o 12 The stoichiometric ratios of the corresponding elements were accurately weighed Y with a purity of 99.99%. 2 o 3 Powder, 99.999% Al 2 o 3 Powder and 99.999% CeO 2 Powder, all three powder materials are dissolved in analytically pure nitric acid with a concentration of 10mol / L to form a powder containing Y 3+ 、Al 3+ 、Ce 3+ mother solution of ions, Y 3+ 、Al 3+ 、Ce 3+ The total molar weight of the three ions is taken as the standard, and the mother liquor is diluted to 0.06mol / L; the analytically pure ammonium sulfate is added to the mother liquor as a dispersant, and its addition amount is Y 3+ 2mol% of molar weight;

[0064] (2) Preparation of precipitant mixed solution: According to the molar ratio of 1:4, analytically pure ammonia water and ammonium bicarbonate are evenly prepared by magnetic stirring, wherein the mass fraction of ammonia water is 25-28%, and the concentration of ammonium ...

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Abstract

The invention discloses a preparation method of a high-luminous-efficiency fluorapatite complex-phase fluorescent ceramic material for LED/LD illumination. The preparation method comprises the following steps: mixing fluoroapatite powder and Ce<3+>: Y3Al5O12 powder according to a certain ratio, and then putting the formed mixture into a ball milling tank together; adding a certain amount of a dispersing agent to prepare slurry with a solid content of 35-60 vol.%; drying, grinding and sieving the slurry in sequence; carrying out calcining in an air atmosphere to obtain fluorapatite-Ce<3+>: Y3Al5O12 mixed powder; putting the obtained mixed powder into a graphite mold; and putting the graphite mold and the mixed powder into a spark plasma sintering furnace for SPS sintering to obtain the fluorapatite complex-phase fluorescent ceramic material with fluorapatite entering ceramic crystal grains. According to the method, the prepared complex-phase fluorescent ceramic material has high transmittance performance, and is improved in luminous efficiency.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a method for preparing a fluoroapatite composite fluorescent ceramic material for LED / LD lighting with high light efficiency. Background technique [0002] Compared with fluorescent lamps and incandescent lamps, white LED as a lighting source has the characteristics of high luminous efficiency, low energy consumption, long service life, environmental protection and no pollution. Therefore, it has been vigorously promoted by governments of various countries and has gradually become the main lighting. One of the light sources. Currently, white LEDs mainly use the combination of blue LED chips and yellow phosphor powder. This packaging method requires phosphor powder to be dispersed in organic resin or silica gel. With the continuous improvement of people's lighting needs, this method of organically encapsulated phosphors can no longer meet the needs of white LEDs with hi...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/50C04B35/622C04B35/626C09K11/77
CPCC04B35/44C04B35/50C04B35/622C04B35/62605C09K11/7774C04B2235/3217C04B2235/3225C04B2235/3229C04B2235/3212C04B2235/5454C04B2235/5445C04B2235/5409C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/658C04B2235/666
Inventor 周天元邵岑康健陈东顺郗晓倩黄国灿李明陈浩
Owner XUZHOU NORMAL UNIVERSITY
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