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A preparation method of fluorapatite composite fluorescent ceramic material for LED/LD lighting with high light efficiency

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 achieve the goal of ensuring the optical quality and luminescent performance of ceramics, good uniformity, and reducing production costs. Effect

Active Publication Date: 2022-03-18
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation method of Ce:YAG transparent ceramic material that satisfies high transmittance and high light efficiency at the same time has not been developed in this field.

Method used

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  • A preparation method of fluorapatite composite fluorescent ceramic material for LED/LD lighting with high light efficiency
  • A preparation method of fluorapatite composite fluorescent ceramic material for LED/LD lighting with high light efficiency
  • A preparation method of fluorapatite composite fluorescent ceramic material for LED/LD lighting with high light efficiency

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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 method for preparing a fluoroapatite composite fluorescent ceramic material for LED / LD lighting with high light efficiency. According to a certain ratio, fluoroapatite powder and Ce 3+ :Y 3 Al 5 o 12 After the powders are mixed, they are placed in a ball mill tank together, and a certain amount of dispersant is added to prepare a slurry with a solid content of 35-60vol.%. Fluorapatite‑Ce was obtained by calcination in atmosphere 3+ :Y 3 Al 5 o 12 Mix the powder, place the obtained mixed powder in a graphite mold, and then place them together in a spark plasma sintering furnace for SPS sintering to obtain a fluorapatite composite fluorescent ceramic material in which fluorapatite enters the interior of the ceramic grain . The method enables the prepared composite fluorescent ceramic material to have high transmittance performance and improve its 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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Patent Type & Authority Patents(China)
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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