CN101962547A - Yellow fluorescent powder for white LED and preparation method thereof - Google Patents

Yellow fluorescent powder for white LED and preparation method thereof Download PDF

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CN101962547A
CN101962547A CN2010105108705A CN201010510870A CN101962547A CN 101962547 A CN101962547 A CN 101962547A CN 2010105108705 A CN2010105108705 A CN 2010105108705A CN 201010510870 A CN201010510870 A CN 201010510870A CN 101962547 A CN101962547 A CN 101962547A
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salt
fluorescent powder
yellow fluorescent
weighing
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CN101962547B (en
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朱达川
马明星
赵聪
韩涛
张进
涂铭旌
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Sichuan University
Chongqing University of Arts and Sciences
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Chongqing University of Arts and Sciences
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Abstract

The invention relates to yellow fluorescent powder for a white LED, and belongs to preparation technology for a luminescent material. The structural formula of the fluorescent powder is YxREyMzCemAl5-nAnO12, wherein RE is at least one of Tb, Gd, Sm, Yb and La; M is at least one of Ba, Ca and Sr; A is at least one of Ga, Mg and Zn; x is more than 2 and less than 3; y is more than or equal to 0 and less than or equal to 0.5; z is more than or equal to 0 and less than or equal to 0.3; m is more than 0 and less than or equal to 0.1; the sum of x, y, z and m is more than 2.9 and less than 3.1; and n is more than or equal to 0 and less than or equal to 0.5. A preparation method comprises the following specific steps of: weighing Y salt, RE salt, M salt, Ce salt, Al salt and A salt in a stoichiometric ratio of each element in the structural formula and an appropriate amount of surfactant and fluxing agent; fully mixing reactants, the surfactant and an appropriate amount of ligand, performing ball milling and adding an appropriate amount of lubricant; filtering, washing and drying to obtain a precursor; and mixing the precursor and the fluxing agent and calcining in the reducing atmosphere to obtain the required fluorescent powder. The fluorescent powder prepared by the method has the advantages of high production efficiency, high repeatability, small particle size, narrow distribution, high luminescent performance, and capability of being effectively excited by a blue light chip.

Description

A kind of Yellow fluorescent powder used by white light LED and preparation method thereof
One, technical field
The invention belongs to the luminescent material technical field, be specifically related to a kind of Yellow fluorescent powder used by white light LED and preparation method thereof.
Two, background technology
Because white light LEDs has energy-saving and environmental protection, life-span length, water, shock, response speed is fast, operating voltage is low, be easy to advantage such as maintenance, now be applied in outdoor lighting, Landscape Lighting, stop-light, automobile with field such as portable lighter, billboard and display backlight in daytime, be considered to after incandescent light, luminescent lamp and HID lamp the 4th generation lighting source.
Commercially available white light LEDs mainly is that blue chip (GaN) and yellow fluorescent powder are packaged together, and utilizes the blue chip excitated fluorescent powder to send gold-tinted, again with the compound realization white-light illuminating of blue light.This white light LEDs simple structure, with low cost, dominate in White-light LED illumination.Commercially available yellow fluorescent powder is based on aluminate, and the most representative is the adulterated yttrium aluminum garnet (Y of cerium 3Al 5O 12: Ce 3+, YAG), owing to lack red composition, cause luminous efficiency and color developing relatively poor with the white light of the compound generation of blue chip, need improve its light efficiency and color developing by adjusting the composition of yellow fluorescent powder.At present, the method for preparing yellow fluorescent powder is more, as: high temperature solid-state method patent US 6614179 B1, CN 1482208A, CN 101126024A; Sol-gel method patent CN 1664063A, CN 101249978A; Precipitator method patent CN 101113333A, CN101012376A; Combustion method patent CN 1398817A; Microwave method patent CN 1052745C; Vapor phase process patent CN 1775904A, CN 1597841A.Because easy and simple to handle, the technology of high temperature solid-state method and preparation equipment is simple, cost is low, suitability for industrialized production is still based on this method.But high temperature solid-state method calcining temperature height, soaking time are long, cause particle thick, and follow-up Ball milling technology can change the surface properties of fluorescent material, causes the reduction in luminescent properties and work-ing life.
Three, summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of light efficiency height, Yellow fluorescent powder used by white light LED that color developing is good and preparation method thereof are provided.The present invention adopts mechanical force solid state reaction legal system to be equipped with Yellow fluorescent powder used by white light LED Y xRE yM zCe mAl 5-nA nO 12, make raw material reaction fully, mix, MODEL OF THE PHOSPHOR PARTICLE SIZE DISTRIBUTION is narrow, good luminous performance.
The present invention is achieved by the following technical solutions, and Yellow fluorescent powder used by white light LED of the present invention, its structural formula are Y xRE yM zCe mAl 5-nA nO 12, wherein RE is at least a among Tb, Gd, Sm, Yb, the La; M is at least a among Ba, Ca, the Sr; A is at least a among Ga, Mg, the Zn; 2＜x＜3; 0≤y≤0.5; 0≤z≤0.3; 0＜m≤0.1; 2.9＜x+y+z+m＜3.1; 0≤n≤0.5, concrete preparation method may further comprise the steps:
(1) according to structural formula Y xRE yM zCe mAl 5-nA nO 12, take by weighing Y salt, RE salt, M salt, Ce salt, Al salt and A salt in molar ratio respectively; Take by weighing tensio-active agent and the fusing assistant of above medicine total mass 0.1wt%～2.0wt% more respectively;
(2) with the Y salt, RE salt, M salt, Ce salt, Al salt, A salt, tensio-active agent and the appropriate amount of ligands thorough mixing that take by weighing, the mol ratio of reactant and part is 1: 2～6, carry out ball milling then, add lubricant during ball milling, the add-on of lubricant is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction;
(3) with above-mentioned product suction filtration, washing, oven dry obtains precursor powder;
(4) precursor powder and fusing assistant are mixed after, under reducing atmosphere, calcine, calcining temperature is 950～1550 ℃, calcination time is 2～8 hours, promptly gets target product.
Among the present invention, Y salt is Y (NO described in the step (1) 3) 36H 2O or YCl 3Described RE salt is Tb (NO 3) 36H 2O, TbCl 3, Gd (NO 3) 36H 2O, GdCl 3, Sm (NO 3) 36H 2O, SmCl 3, Yb (NO 3) 36H 2O, YbCl 3, La (NO 3) 36H 2O, LaCl 3In at least a; Described M salt is Ba (NO 3) 2, BaCl 22H 2O, Ca (NO 3) 24H 2O, CaCl 26H 2O, Sr (NO 3) 2, SrCl 26H 2At least a among the O; Described Ce salt is Ce (NO 3) 36H 2O or CeCl 3Described Al salt is Al (NO 3) 39H 2O or AlCl 3Described A salt is Ga (NO 3) 3H 2O, GaCl 3, Mg (NO 3) 26H 2O, MgCl 2, Zn (NO 3) 2, ZnCl 2In at least a; Described tensio-active agent is Sodium dodecylbenzene sulfonate or polyoxyethylene glycol; Described fusing assistant is H 3BO 3, NH 4F, Li 2CO 3In at least a.
Among the present invention, part is C described in the step (2) 2H 2O 4, NH 4HCO 3, (NH 4) 2CO 3In a kind of; Described lubricant is an acetone or alcohol.
Among the present invention, reducing atmosphere is provided by the activated carbon powder combustion method described in the step (4), or uses nitrogen/hydrogen mixed gas.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention prepares calcining process of fluorescent material employing, finishes doping simultaneously at the precursor pyrolysated, compares with traditional high temperature solid-state method, and calcining temperature is low, soaking time is short, the production efficiency height.
2, the fluorescent powder grain of the present invention's preparation is even, narrow particle size distribution, and crystallinity and coating property are good, and have good circulation ratio.
3, the fluorescent material excitation wavelength range of the present invention's preparation is wide, the luminous intensity height, and stability and color developing are good, can effectively be excited by blue-light LED chip (GaN).
Four, description of drawings
Fig. 1 is the process flow sheet of the synthetic method of a kind of Yellow fluorescent powder used by white light LED provided by the present invention;
Fig. 2 is yellow fluorescent powder Y 2.75Gd 0.1Ba 0.05Ce 0.06Al 5O 12Supervisory wavelength is the excitation spectrum of 535nm;
Fig. 3 is yellow fluorescent powder Y 2.75Gd 0.1Ba 0.05Ce 0.06Al 5O 12Excitation wavelength is the emmission spectrum of 450nm.
Five, embodiment
Embodiment 1
According to structural formula Y 2.53Tb 0.45Ce 0.02Al 4.9Zn 0.1O 12Take by weighing Y (NO respectively 3) 36H 2O (A.R.) 2.53mol, Tb (NO 3) 36H 2O (A.R.) 0.45mol, Ce (NO 3) 36H 2O (A.R.) 0.02mol, Al (NO 3) 39H 2O (A.R.) 4.9mol and Zn (NO 3) 2(A.R.) 0.1mol takes by weighing tensio-active agent Sodium dodecylbenzene sulfonate and the fusing assistant H of above medicine total mass 0.1wt% more respectively 3BO 3With nitrate, tensio-active agent and the appropriate amount of ligands NH that takes by weighing 4HCO 3(reactant and part ratio are 1: 4) thorough mixing carries out ball milling then, adds lubricant acetone during ball milling, and the add-on of acetone is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, provide under the reducing atmosphere in the activated carbon powder burning and to calcine, calcining temperature is 950 ℃, and calcination time is 8 hours, promptly gets target product.
Embodiment 2
According to structural formula Y 2.5Sm 0.35Sr 0.1Ce 0.04Al 4.8Zn 0.2O 12Take by weighing Y (NO respectively 3) 36H 2O (A.R.) 2.5mol, Sm (NO 3) 36H 2O (A.R.) 0.35mol, Sr (NO 3) 2(A.R.) 0.1mol, Ce (NO 3) 36H 2O (A.R.) 0.04mol, Al (NO 3) 39H 2O (A.R.) 4.8mol and Zn (NO 3) 2(A.R.) 0.2mol takes by weighing tensio-active agent Sodium dodecylbenzene sulfonate and the fusing assistant NH of above medicine total mass 0.3wt% more respectively 4F; With nitrate, tensio-active agent and the appropriate amount of ligands (NH that takes by weighing 4) 2CO 3(reactant and part ratio are 1: 3) thorough mixing carries out ball milling then, adds lubricant acetone during ball milling, and the add-on of acetone is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, provide under the reducing atmosphere in the activated carbon powder burning and to calcine, calcining temperature is 1100 ℃, and calcination time is 6.5 hours, promptly gets target product.
Embodiment 3
According to structural formula Y 2.5Gd 0.25Ba 0.2Ce 0.06Al 4.7Ga 0.3O 12Take by weighing Y (NO respectively 3) 36H 2O (A.R.) 2.5mol, Gd (NO 3) 36H 2O (A.R.) 0.25mol, Ba (NO 3) 2(A.R.) 0.2mol, Ce (NO 3) 36H 2O (A.R.) 0.06mol, Al (NO 3) 39H 2O (A.R.) 4.7mol and Ga (NO 3) 3H 2O (A.R.) 0.3mol takes by weighing tensio-active agent Sodium dodecylbenzene sulfonate and the fusing assistant Li of above medicine total mass 0.5wt% more respectively 2CO 3With nitrate, tensio-active agent and the appropriate amount of ligands C that takes by weighing 2H 2O 4(reactant and part ratio are 1: 2) thorough mixing carries out ball milling then, adds lubricant acetone during ball milling, and the add-on of acetone is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, provide under the reducing atmosphere in the activated carbon powder burning and to calcine, calcining temperature is 1250 ℃, and calcination time is 5 hours, promptly gets target product.
Embodiment 4
According to structural formula Y 2.5Yb 0.15Ca 0.3Ce 0.08Al 4.6Ga 0.4O 12Take by weighing Y (NO respectively 3) 36H 2O (A.R.) 2.5mol, Yb (NO 3) 36H 2O (A.R.) 0.15mol, Ca (NO 3) 24H 2O (A.R.) 0.3mol, Ce (NO 3) 36H 2O (A.R.) 0.08mol, Al (NO 3) 39H 2O (A.R.) 4.6mol and Ga (NO 3) 3H 2O (A.R.) 0.4mol takes by weighing tensio-active agent Sodium dodecylbenzene sulfonate and the fusing assistant Li of above medicine total mass 0.8wt% more respectively 2CO 3With nitrate, tensio-active agent and the appropriate amount of ligands NH that takes by weighing 4HCO 3(reactant and part ratio are 1: 5) thorough mixing carries out ball milling then, adds lubricant ethanol during ball milling, and the alcoholic acid add-on is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, provide under the reducing atmosphere in the activated carbon powder burning and to calcine, calcining temperature is 1400 ℃, and calcination time is 3.5 hours, promptly gets target product.
Embodiment 5
According to structural formula Y 2.6La 0.05Sr 0.2Ce 0.1Al 4.5Mg 0.5O 12Take by weighing Y (NO respectively 3) 36H 2O (A.R.) 2.6mol, La (NO 3) 36H 2O (A.R.) 0.05mol, Sr (NO 3) 2(A.R.) 0.2mol, Ce (NO 3) 36H 2O (A.R.) 0.1mol, Al (NO 3) 39H 2O (A.R.) 4.5mol and Mg (NO 3) 26H 2O (A.R.) 0.5mol takes by weighing tensio-active agent Sodium dodecylbenzene sulfonate and the fusing assistant NH of above medicine total mass 1wt% more respectively 4F; With nitrate, tensio-active agent and the appropriate amount of ligands (NH that takes by weighing 4) 2CO 3(reactant and part ratio are 1: 4) thorough mixing carries out ball milling then, adds lubricant ethanol during ball milling, the alcoholic acid add-on is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction: suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, provide under the reducing atmosphere in the activated carbon powder burning and to calcine, calcining temperature is 1550 ℃, and calcination time is 2 hours, promptly gets target product.
Embodiment 6
According to structural formula Y 2.88Ba 0.1Ce 0.02Al 4.75Mg 0.25O 12Take by weighing YCl respectively 3(A.R.) 2.88mol, BaCl 22H 2O (A.R.) 0.1mol, CeCl 3(A.R.) 0.02mol, AlCl 3(A.R.) 4.75mol and MgCl 2(A.R.) 0.25mol takes by weighing surfactant polyethylene and the fusing assistant H of above medicine total mass 1.1wt% more respectively 3BO 3With muriate, tensio-active agent and the appropriate amount of ligands C that takes by weighing 2H 2O 4(reactant and part ratio are 1: 3) thorough mixing carries out ball milling then, adds lubricant acetone during ball milling, and the add-on of acetone is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, calcine under nitrogen/hydrogen mixed gas provides reducing atmosphere, calcining temperature is 950 ℃, and calcination time is 8 hours, promptly gets target product.
Embodiment 7
According to structural formula Y 2.96Ce 0.04Al 4.8Ga 0.1Mg 0.1O 12Take by weighing YCl respectively 3(A.R.) 2.96mol, CeCl 3(A.R.) 0.04mol, AlCl 3(A.R.) 4.8mol, GaCl 3(A.R.) 0.1mol and MgCl 2(A.R.) 0.1mol takes by weighing surfactant polyethylene and the mixed flux H of above medicine total mass 1.3wt% more respectively 3BO 3And NH 4F (the mixing quality ratio is 1: 1); With muriate, tensio-active agent and the appropriate amount of ligands (NH that takes by weighing 4) 2CO 3(reactant and part ratio are 1: 5) thorough mixing carries out ball milling then, adds lubricant acetone during ball milling, and the add-on of acetone is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, calcine under nitrogen/hydrogen mixed gas provides reducing atmosphere, calcining temperature is 1100 ℃, and calcination time is 6.5 hours, promptly gets target product.
Embodiment 8
According to structural formula Y 2.75Gd 0.1Ba 0.05Ce 0.06Al 5O 12Take by weighing YCl respectively 3(A.R.) 2.75mol, GdCl 3(A.R.) 0.1mol, BaCl 22H 2O (A.R.) 0.05mol, CeCl 3(A.R.) 0.06mol and AlCl 3(A.R.) 5mol takes by weighing surfactant polyethylene and the mixed flux H of above medicine total mass 1.5wt% more respectively 3BO 3And Li 2CO 3(the mixing quality ratio is 1: 1); With muriate, tensio-active agent and the appropriate amount of ligands C that takes by weighing 2H 2O 4(reactant and part ratio are 1: 3) thorough mixing carries out ball milling then, adds lubricant ethanol during ball milling, and the alcoholic acid add-on is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, calcine under nitrogen/hydrogen mixed gas provides reducing atmosphere, calcining temperature is 1250 ℃, and calcination time is 5 hours, promptly gets target product.
Embodiment 9
According to structural formula Y 2.6Tb 0.1Ba 0.05Sr 0.05Ce 0.08Al 5O 12Take by weighing YCl respectively 3(A.R.) 2.6mol, TbCl 3(A.R.) 0.1mol, BaCl 22H 2O (A.R.) 0.05mol, SrCl 26H 2O (A.R.) 0.05mol, CeCl 3(A.R.) 0.08mol and AlCl 3(A.R.) 5mol takes by weighing surfactant polyethylene and the mixed flux NH of above medicine total mass 1.8wt% more respectively 4F and Li 2CO 3(the mixing quality ratio is 1: 1); With muriate, tensio-active agent and the appropriate amount of ligands NH that takes by weighing 4HCO 3(reactant and part ratio are 1: 6) thorough mixing carries out ball milling then, adds lubricant ethanol during ball milling, and the alcoholic acid add-on is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, calcine under nitrogen/hydrogen mixed gas provides reducing atmosphere, calcining temperature is 1400 ℃, and calcination time is 3.5 hours, promptly gets target product.
Embodiment 10
According to structural formula Y 2.65Tb 0.05Gd 0.05Ca 0.15Ce 0.1Al 5O 12Take by weighing YCl respectively 3(A.R.) 2.65mol, TbCl 3(A.R.) 0.05mol, GdCl 3(A.R.) 0.05mol, CaCl 26H 2O (A.R.) 0.15mol, CeCl 3(A.R.) 0.1mol and AlCl 3(A.R.) 5mol takes by weighing surfactant polyethylene and the fusing assistant H of above medicine total mass 1.8wt% more respectively 3BO 3With muriate, tensio-active agent and the appropriate amount of ligands C that takes by weighing 2H 2O 4(reactant and part ratio are 1: 4) thorough mixing carries out ball milling then, adds lubricant ethanol during ball milling, and the alcoholic acid add-on is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction; Suction filtration, washing, oven dry obtains precursor powder; After precursor powder and fusing assistant mixed, calcine under nitrogen/hydrogen mixed gas provides reducing atmosphere, calcining temperature is 1550 ℃, and calcination time is 2 hours, promptly gets target product.

Claims (5)

1. a Yellow fluorescent powder used by white light LED is characterized in that LED with the structural formula of yellow fluorescent powder is: Y xRE yM zCe mAl 5-nA nO 12, wherein RE is at least a among Tb, Gd, Sm, Yb, the La; M is at least a among Ba, Ca, the Sr; A is at least a among Ga, Mg, the Zn; 2＜x＜3; 0≤y≤0.5; 0≤z≤0.3; 0＜m≤0.1; 2.9＜x+y+z+m＜3.1; 0≤n≤0.5.
2. the preparation method of fluorescent material according to claim 1 is characterized in that this method is to use mechanical force solid state reaction method prepared Yellow fluorescent powder used by white light LED, and concrete steps are as follows:
(1) according to structural formula Y xRE yM zCe mAl 5-nA nO 12, take by weighing Y salt, RE salt, M salt, Ce salt, Al salt and A salt in molar ratio respectively; Take by weighing tensio-active agent and the fusing assistant of above medicine total mass 0.1wt%～2.0wt% more respectively;
(2) with the Y salt, RE salt, M salt, Ce salt, Al salt, A salt, tensio-active agent and the appropriate amount of ligands thorough mixing that take by weighing, the mol ratio of reactant and part is 1: 2～6, carry out ball milling then, add lubricant during ball milling, the add-on of lubricant is to be kept dispersion to exceed by the ball milling system, till reactant and part complete reaction;
(3) with above-mentioned product suction filtration, washing, oven dry obtains precursor powder;
(4) precursor powder and fusing assistant are mixed after, under reducing atmosphere, calcine, calcining temperature is 950～1550 ℃, calcination time is 2～8 hours, promptly gets target product.
3. the preparation method of a kind of Yellow fluorescent powder used by white light LED as claimed in claim 2 is characterized in that Y salt is Y (NO described in the step (1) 3) 36H 2O or YCl 3Described RE salt is Tb (NO 3) 36H 2O, TbCl 3, Gd (NO 3) 36H 2O, GdCl 3, Sm (NO 3) 36H 2O, SmCl 3, Yb (NO 3) 36H 2O, YbCl 3, La (NO 3) 36H 2O, LaCl 3In kind at least; Described M salt is Ba (NO 3) 2, BaCl 22H 2O, Ca (NO 3) 24H 2O, CaCl 26H 2O, Sr (NO 3) 2, SrCl 26H 2At least a among the O; Described Ce salt is Ce (NO 3) 36H 2O or CeCl 3Described Al salt is Al (NO 3) 39H 2O or AlCl 3Described A salt is Ga (NO 3) 3H 2O, GaCl 3, Mg (NO 3) 26H 2O, MgCl 2, Zn (NO 3) 2, ZnCl 2In at least a; Described tensio-active agent is Sodium dodecylbenzene sulfonate or polyoxyethylene glycol; Described fusing assistant is H 3BO 3, NH 4F, Li 2CO 3In at least a.
4. the preparation method of a kind of Yellow fluorescent powder used by white light LED as claimed in claim 2 is characterized in that part is C described in the step (2) 2H 2O 4, NH 4HCO 3, (NH 4) 2CO 3In a kind of; Described lubricant is an acetone or alcohol.
5. the preparation method of a kind of Yellow fluorescent powder used by white light LED as claimed in claim 2 is characterized in that reducing atmosphere is provided by the activated carbon powder combustion method described in the step (4), or uses nitrogen/hydrogen mixed gas.
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CN102220131A (en) * 2011-04-02 2011-10-19 重庆文理学院 Ball-shaped red-enhanced phosphor used in white light LED, and preparation method thereof
CN102925975A (en) * 2011-08-09 2013-02-13 上海祥羚光电科技发展有限公司 Making method for YAG single crystal for white light LED
TWI472596B (en) * 2014-01-16 2015-02-11 中原大學 Phosphors, fabricating method thereof, and light emitting device employing the same
WO2015099145A1 (en) * 2013-12-27 2015-07-02 国立大学法人京都大学 Phosphor and method for producing phosphor
CN105238403A (en) * 2012-06-25 2016-01-13 重庆文理学院 Fluorescent powder and preparation method therefor
CN106459758A (en) * 2014-05-01 2017-02-22 东北泰克诺亚奇股份有限公司 Illuminant and radiation detector
CN109504382A (en) * 2018-12-20 2019-03-22 五邑大学 A kind of deep trap long-afterglow material, its optical storage method, preparation method and CD
CN115305087A (en) * 2022-08-15 2022-11-08 烟台布莱特光电材料有限公司 A small particle YAG: preparation method of Ce spherical fluorescent powder

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CN101760196A (en) * 2009-12-29 2010-06-30 四川大学 Method for combining yellow fluorescent powder used for white light LED

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CN102220131A (en) * 2011-04-02 2011-10-19 重庆文理学院 Ball-shaped red-enhanced phosphor used in white light LED, and preparation method thereof
CN102925975A (en) * 2011-08-09 2013-02-13 上海祥羚光电科技发展有限公司 Making method for YAG single crystal for white light LED
CN105238403A (en) * 2012-06-25 2016-01-13 重庆文理学院 Fluorescent powder and preparation method therefor
WO2015099145A1 (en) * 2013-12-27 2015-07-02 国立大学法人京都大学 Phosphor and method for producing phosphor
TWI472596B (en) * 2014-01-16 2015-02-11 中原大學 Phosphors, fabricating method thereof, and light emitting device employing the same
CN106459758A (en) * 2014-05-01 2017-02-22 东北泰克诺亚奇股份有限公司 Illuminant and radiation detector
US10174247B2 (en) 2014-05-01 2019-01-08 Tohoku Techno Arch Co., Ltd. Illuminant and radiation detector
CN109504382A (en) * 2018-12-20 2019-03-22 五邑大学 A kind of deep trap long-afterglow material, its optical storage method, preparation method and CD
CN115305087A (en) * 2022-08-15 2022-11-08 烟台布莱特光电材料有限公司 A small particle YAG: preparation method of Ce spherical fluorescent powder
CN115305087B (en) * 2022-08-15 2023-11-21 烟台布莱特光电材料有限公司 Small particle YAG: preparation method of Ce spherical fluorescent powder

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