CN101885965A - Rare earth-doped nitrogen oxide fluorescent powder material and preparation method thereof - Google Patents
Rare earth-doped nitrogen oxide fluorescent powder material and preparation method thereof Download PDFInfo
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- CN101885965A CN101885965A CN2010102099704A CN201010209970A CN101885965A CN 101885965 A CN101885965 A CN 101885965A CN 2010102099704 A CN2010102099704 A CN 2010102099704A CN 201010209970 A CN201010209970 A CN 201010209970A CN 101885965 A CN101885965 A CN 101885965A
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Abstract
The invention discloses a rare earth-doped nitrogen oxide fluorescent powder material and a preparation method thereof. The preparation method comprises the following steps of: (1) weighing a solid compound which contains elements A, B, R and E according to the general chemical formula of A1-xByOzN2/3+4/3y-2/3z:xRE, and grinding, mixing and sintering the solid compound to obtain a compound A(1-x)2SiO4:2xRE2; (2) grinding and mixing the compound A(1-x)2SiO4:2xRE obtained in the step (1) and nitrogen oxide which contains the element B according to the mole ratio of A to B to RE in the general chemical formula of A1-xByOzN2/3+4/3y-2/3z:xRE to obtain a mixture; (3) adding a catalyst into the mixture obtained in the step (2) for sintering; and (4) cooling a sintered product obtained in the step (3), taking the product out, and grinding and washing the product to obtain nitrogen oxide fluorescent powder. In the method, the catalyst fully acts in the entire synthesis process and residues in synthesis are discharged fully, so that the nitrogen oxide fluorescent powder with high crystallization purity can be obtained finally and the optical performance of the nitrogen oxide fluorescent powder is improved. The method has the advantages of strong operability, low raw material cost, wide process window and suitability for large-scale industrial production.
Description
Technical field:
The present invention relates to a kind of preparation method of rear-earth-doped nitric oxide fluorescent powder, particularly a kind ofly utilize common cheap compound to be starting material, take the novel method of the synthetic rare earth doped nitric oxide fluorescent powder of two sections pressure control methods.
Background technology:
Utilize GaN base LED to realize that general white-light illuminating has become the main technical schemes that solid-state illumination is realized in the whole world.Target at realizing general illumination has blue-ray LED+Yttrium aluminum garnet YAG at present) fluorescent material and UV-LED+ three-color phosphor two lines.
The concrete principle of blue led+YAG fluorescent material is: the YAG:Ce fluorescent material that can produce gold-tinted is scattered in the transparent epoxy resin, and the light that produces with the blue led of being located in the bowl cup excites and converts white light to again.The white-light emitting mechanism of this mode is that the blue-light excited YAG fluorescent material of part that utilizes LED to produce produces gold-tinted, the gold-tinted colour mixture of rest parts blue light and generation and then become white light.Another route of the white actinic of LED is: the array mode of near ultraviolet LED+RGB fluor.This mode is more and more paid attention to recently, the feature of this mode is to convert the near-ultraviolet light that LED produces to red (R), green (G), blue (B) three kinds of color resynthesis white light respectively, the white light scope that it is contained is broader than the mode of blue LED+YAG fluorescent material, to convert the principle of R, G, B to identical with conventional fluorescent for UV-light in addition, therefore there is not the puzzlement of color inequality, and color rendering is very outstanding, and the green emitting phosphor that therefore develops excellent property is very necessary.
The Si-O-N system has stable physicochemical property, can effectively solve anti-ultraviolet of present fluorescent material and the relatively poor problem of heat aging performance after rear-earth-doped, is the good system of preparation green emitting phosphor.More than 90% and have higher quenching temperature, but the synthesis condition of ordinary method is comparatively harsh through the adulterated nitric oxide fluorescent powder transformation efficiency of Eu2+, and products therefrom crystalline phase purity is lower.
Summary of the invention:
The synthesis condition that the objective of the invention is to overcome ordinary method is comparatively harsh, and the shortcoming that products therefrom crystalline phase purity is lower, provide that a kind of to adopt common cheap compound be the synthetic physical chemistry stable in properties of starting material, the novel method of the oxynitride that luminescent properties is good, simple, the suitable large-scale industrial production of this method, and synthetic fluorescent material can excite the bluish-green-yellow-green light of emission down in ultraviolet-blue chip.
The objective of the invention is to solve by the following technical programs:
A kind of rear-earth-doped nitrogen oxide fluorescent powder material, the chemical general formula of described nitrogen oxide fluorescent powder material are A
1-xB
yO
zN
2/3+4/3y-2/3z: xRE, wherein A is Ca, Ba, Sr; B is Si; RE is Eu.
A kind of preparation method of rear-earth-doped nitrogen oxide fluorescent powder material, according to following steps:
(1) according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the mol ratio of A, B, RE takes by weighing the solid chemical compound that contains A, B, RE element among the xRE, and its grinding, mixing are obtained once mixture, account for once mixture total amount 2-4wt% catalyzer in the once mixture adding, obtains compd A behind the sintering
(1-x) 2SiO
4: 2xRE, the solid chemical compound that wherein contains the B element is SiO
2
(2) according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the mol ratio of A, B, RE is with step (1) gained compd A among the xRE
(1-x) 2SiO
4: 2xRE grinds with the nitride that contains the B element, mix and obtain mixture;
(3) in step (2), add in the mixture and account for amount of the mixture 2-4wt% catalyzer, under the protective atmosphere condition, carry out sintering;
(4) grinding, washing are taken out in step (3) sintered product cooling back, promptly get nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y2/3z: xRE.
Sintering in the described step (1) is meant: at protective gas N
2, Ar, H
2, N
2/ H
2, NH
3In one or more the condition of combination under, sintering temperature is at 1000 ℃-1300 ℃, the sintering process of sintering time 〉=3 hour.
The sintering that carries out under the protective atmosphere condition in the described step (3) is meant: protective gas N
2, Ar, H
2, N
2/ H
2, NH
3In one or more the condition of combination under, sintering temperature 〉=1400 ℃, the sintering process of sintering time 〉=5 hour.
Catalyzer in the described step (3) is H
3BO
3, NH
4The fluorochemical of Cl or A element.
The present invention has avoided the starting material reaction generates under the condition of high temperature impurity or resistates to discharge, thereby has generated the relatively poor oxynitride of luminescent properties by two sections pressure control method synthetic nitrogen oxide fluorescent powders.
At first carry out the making of LED green emitting phosphor precursor, according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the stoichiometric ratio of each element takes by weighing solid chemical compound and the SiO that contains A, Re element among the xRe
2, after grinding, mixing, carry out high temperature sintering, obtain compd A
(1-x) 2SiO
4: 2xRe.
Take two sections pressure control method synthetic nitrogen oxide fluorescent powders below, according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the stoichiometric ratio of each element is with product A among the xRe
(1-x) 2SiO
4: 2xRe is with after the nitride that contains the B element fully grinds, mixes, add the catalyzer of 2%-5% again, place high temperature sintering furnace, because catalyzer begins fusing when 200 ℃ of left and right sides, in order to make catalyzer can fully act on this mixture, so need apply certain pressure; When high temperature, starting material react, if at this moment its reaction residue can't fully be volatilized, can make the inner grey black spot material that generates of nitric oxide fluorescent powder, and its surface generates the grey black duricrust, thereby influence the luminescent properties of oxynitride, and reduced output, the method that we take is at high temperature to reduce pressure, and oxynitride is under the normal pressure, so that reacted impurity of starting material and resistates are fully discharged, thereby obtain the nitric oxide fluorescent powder of luminescent properties excellence.These starting material carry out sintering under the atmosphere protection condition, cooling promptly gets nitric oxide fluorescent powder A after taking out and grind, washing
1-xB
yO
zN
2/3+4/3y-2/3z: xRe.
The preparation method of described nitric oxide fluorescent powder, experimentation takes two sections pressure control methods to carry out.
The preparation method of described nitric oxide fluorescent powder, the A element is introduced system by its carbonate, nitrate or its oxide compound, and the Re element is introduced by its metal oxide, takes by weighing solid chemical compound and the SiO that contains A, Re element according to stoichiometric ratio
2, after grinding, mixing, carry out high temperature sintering, obtain silicate compound, this is the precursor of nitric oxide fluorescent powder.
The preparation method of described nitric oxide fluorescent powder, compd A
(1-x) 2SiO
4: can in shielding gas, carry out sintering as required in the building-up process of 2xRe.
The preparation method of described nitric oxide fluorescent powder, compd A
(1-x) 2SiO
4: 2xRe can add the catalyzer of 2%-5%, to promote the synthetic of this precursor.
The preparation method of described nitric oxide fluorescent powder, compd A
(1-x) 2SiO
4: sintering temperature is at 1000 ℃-1300 ℃ in the 2xRe building-up process.
The preparation method of described nitric oxide fluorescent powder is characterized in that: compd A
(1-x) 2SiO
4: sintering time in the building-up process of 2xRe 〉=3 hour.
The preparation method of described nitric oxide fluorescent powder, nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: carry out under protective atmosphere in the sintering process of xRe, shielding gas can be selected N as required
2, Ar, H
2, N
2/ H
2, NH
3In one or more combination.
The preparation method of described nitric oxide fluorescent powder, nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: the sintering temperature of xRe 〉=1400 ℃.
The preparation method of described nitric oxide fluorescent powder, nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: the sintering time of xRe 〉=5 hour.
The preparation method of described nitric oxide fluorescent powder, nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: xRe can add the catalyzer of 2%-5%, and is synthetic at a lower temperature to promote this fluorescent material, the brightness that improves fluorescent material.
The preparation method of described nitric oxide fluorescent powder, nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: the sintering process of xRe has been taked two sections pressure control methods, promptly before the starting material reaction, apply the pressure of 0.05-0.08MPa, impel catalyzer fully to act on the starting material step of reaction, reduce its volatilization, and starting material fully react finish after, reduce pressure to 0-0.01MPa, make synthetic nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y-2/3z: xRe the resistates inner and surface is fully discharged.
The preparation method of described nitric oxide fluorescent powder according to concrete experiment, can add Li, Na metal ion as the charge compensation agent in the nitric oxide fluorescent powder building-up process.
The preparation method of described nitric oxide fluorescent powder, described A
(1-x) 2SiO
4: 2xRe and A
1-xB
yO
zN
2/3+4/3y-2/3z: the catalyzer in the xRe building-up process mainly plays the effect of fluxing, for example H
3BO
3, NH
4Cl and AF
2(fluorochemical of A element) auxiliary agent.
Two sections pressure control methods are divided according to temperature and air bubble flow rate, the present invention utilizes temperature to be used as the criteria for classifying emphatically, 1000 ℃-1300 ℃ when beginning with building-up reactions is criteria, because reaction is violent when building-up reactions is carried out, can detect by observing bubble (one of detection means of high temperature sintering furnace reaction), during speed before the bubble flow is tending towards reacting, think that reaction finishes, one reaction times is 〉=3 hours.
Advantage of the present invention and effect:
1, the present invention is workable, and cost of material is cheap, and process window is wide, is suitable for large-scale industrial production.
2, the present invention adopts two sections pressure control methods, both can make catalyzer fully act on entire synthesis process, and the abundant discharge of the resistates in helping synthesizing, finally can obtain the higher nitric oxide fluorescent powder of crystallization purity, promoted the optical property of nitric oxide fluorescent powder.
Description of drawings:
Fig. 1 is the emmission spectrum comparison diagram of synthetic sample under normal pressure according to two sections pressure control styles of embodiments of the invention 1 gained product and its correspondence, and excitation wavelength is 460nm;
Fig. 2 is the emmission spectrum comparison diagram of synthetic sample under normal pressure according to two sections pressure control styles of embodiments of the invention 2 gained product and its correspondence, and excitation wavelength is 460nm;
Fig. 3 is the emmission spectrum comparison diagram of synthetic sample under normal pressure according to two sections pressure control styles of embodiments of the invention 3 gained product and its correspondence, and excitation wavelength is 460nm;
Fig. 4 is the emmission spectrum comparison diagram of synthetic sample under normal pressure according to two sections pressure control styles of embodiments of the invention 1 gained product and its correspondence, and excitation wavelength is 460nm;
Fig. 5 is the X ray diffracting spectrum (XRD) according to two sections pressure control styles of embodiments of the invention 4 gained product;
Wherein, curve 1 is a synthetic sample under the normal pressure among Fig. 1-Fig. 4, and curve 2 is according to two sections pressure control styles of embodiments of the invention gained product.
Embodiment:
Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with embodiment, the preparation method of a kind of rare earth doped nitric oxide fluorescent powder that foundation the present invention is proposed is elaborated.
Embodiment 1:
According to Ca
2SiO
4Take by weighing CaCO
3198.17g, SiO
260.1g, Eu
2O
33.52g, the catalyzer CaF of 3wt%
2Be put in the alumina crucible after mixing, fully grinding, crucible is placed tube furnace, 3 hours postcooling of 1000 ℃ of sintering obtain Ca in air
2SiO
4According to Ca
1.98Si
2O
2N
2: the stoichiometric ratio of 0.02Eu element is with gained Ca
2SiO
4After grinding is sieved again with α-Si
3N
4(mass ratio α-Si
3N
4/ Ca
2SiO
4=0.9) and the catalyzer CaF of 3wt%
2Put into molybdenum crucible behind the mixed grinding, crucible is moved in the high temperature process furnances, at N
2The following 1500 ℃ of sintering of atmosphere 5 hours, wherein starting material react at 1200 ℃, for the atmosphere that makes catalyzer fully acts on starting material, the pressure that before reaction is finished, should keep 0.05MPa, to avoid the catalyzer volatilization, after treating that the starting material reaction finishes, promptly in 1200 ℃ of-1500 ℃ of temperature raising periods, reduce pressure to 0, help the rapid discharge of reaction residue, guarantee the optical property of nitric oxide fluorescent powder, be cooled to room temperature taking-up grinding afterwards and sieve after promptly obtain green emitting phosphor Ca after the ethylene glycol washing drying
1.98Si
2O
2N
2: 0.02Eu.
Embodiment 2:
According to Ba
2SiO
4Take by weighing BaCO
3386.78g, SiO
260.1g, Eu
2O
37.04g and the catalyst n H of 3wt%
4Cl is put in the alumina crucible after mixing, fully grinding, and crucible is placed tube furnace, at N
2: H
23 hours postcooling of the following 1000 ℃ of sintering of=9: 1 reducing atmosphere obtain Ba
2SiO
4According to Ba
1.96Si
2O
2N
2O
4: the stoichiometric ratio of each element of 0.04Eu is with gained Ba
2SiO
4After grinding is sieved again with α-Si
3N
4(mass ratio α-Si
3N
4/ Ba
1.96SiO
4: 0.04Eu=0.9) and the catalyst n H of 3wt%
4Put into molybdenum crucible behind the Cl mixed grinding, crucible is moved in the high temperature process furnances, at N
2The following 1500 ℃ of sintering of atmosphere 5 hours, wherein starting material react at 1200 ℃, for the atmosphere that makes catalyzer fully acts on starting material, the pressure that before reaction is finished, should keep 0.05MPa, to avoid the catalyzer volatilization, after treating that the starting material reaction finishes, promptly in 1200 ℃ of-1500 ℃ of temperature raising periods, reduce pressure to 0, help the rapid discharge of reaction residue, guarantee the optical property of nitric oxide fluorescent powder, be cooled to room temperature taking-up grinding afterwards and sieve after promptly obtain green emitting phosphor Ba after the ethylene glycol washing drying
1.96Si
2O
2N
2: 0.04Eu.
Embodiment 3:
According to Sr
2SiO
4Take by weighing SrCO
3173.6g, SiO
236.05g, Eu
2O
34.22g and the catalyst n H of 3wt%
4Cl is put in the alumina crucible after mixing, fully grinding, and crucible is placed tube furnace, at N
2: H
23 hours postcooling of the following 1000 ℃ of sintering of=9: 1 reducing atmosphere obtain Sr
2SiO
4According to Sr
1.96Si
2O
2N
2O
4: the stoichiometric ratio of each element of 0.04Eu is with gained Sr
2SiO
4After grinding is sieved again with α-Si
3N
4(mass ratio α-Si
3N
4/ Si
1.96SiO
4: 0.04Eu=0.9) and the catalyst n H of 3wt%
4Put into molybdenum crucible behind the Cl mixed grinding, crucible is moved in the high temperature process furnances, at N
2The following 1500 ℃ of sintering of atmosphere 5 hours, wherein starting material react at 1200 ℃, for the atmosphere that makes catalyzer fully acts on starting material, the pressure that before reaction is finished, should keep 0.05MPa, to avoid the catalyzer volatilization, after treating that the starting material reaction finishes, promptly in 1200 ℃ of-1500 ℃ of temperature raising periods, reduce pressure to 0, help the rapid discharge of reaction residue, guarantee the optical property of nitric oxide fluorescent powder, be cooled to room temperature taking-up grinding afterwards and sieve after promptly obtain green emitting phosphor Sr after the ethylene glycol washing drying
1.96Si
2O
2N
2: 0.04Eu.
Embodiment 4:
According to Sr
2SiO
4Take by weighing SrCO
3292.3gg, SiO
260.1g, Eu
2O
33.52g and the catalyst n H of 3wt%
4Cl is put in the alumina crucible after mixing, fully grinding, and crucible is placed tube furnace, at N
2: H
23 hours postcooling of the following 1000 ℃ of sintering of=9: 1 reducing atmosphere obtain Sr
2SiO
4According to Sr
1.98Si
2O
2N
2O
4: the stoichiometric ratio of each element of 0.02Eu is with gained Sr
2SiO
4After grinding is sieved again with α-Si
3N
4(mass ratio α-Si
3N
4/ Si
1.98SiO
4: 0.02Eu=0.9) and the catalyst n H of 3wt%
4Put into molybdenum crucible behind the Cl mixed grinding, crucible is moved in the high temperature process furnances, at N
2The following 1500 ℃ of sintering of atmosphere 5 hours, wherein starting material react at 1200 ℃, for the atmosphere that makes catalyzer fully acts on starting material, the pressure that before reaction is finished, should keep 0.07MPa, to avoid the catalyzer volatilization, after treating that the starting material reaction finishes, promptly in 1200 ℃ of-1500 ℃ of temperature raising periods, reduce pressure to 0, help the rapid discharge of reaction residue, guarantee the optical property of nitric oxide fluorescent powder, be cooled to room temperature taking-up grinding afterwards and sieve after promptly obtain green emitting phosphor Sr after the ethylene glycol washing drying
1.98Si
2O
2N
2: 0.02Eu.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (5)
1. rear-earth-doped nitrogen oxide fluorescent powder material, it is characterized in that: the chemical general formula of described nitrogen oxide fluorescent powder material is A
1-xB
yO
zN
2/3+4/3y-2/3z: xRE, wherein A is Ca, Ba, Sr; B is Si; RE is Eu.
2. a kind of according to claim 1 preparation method of rear-earth-doped nitrogen oxide fluorescent powder material is characterized in that, according to following steps:
(1) according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the mol ratio of A, B, RE takes by weighing the solid chemical compound that contains A, B, RE element among the xRE, and its grinding, mixing are obtained once mixture, account for once mixture total amount 2-4wt% catalyzer in the once mixture adding, obtains compd A behind the sintering
(1-x) 2SiO
4: 2xRE, the solid chemical compound that wherein contains the B element is SiO
2
(2) according to chemical general formula A
1-xB
yO
zN
2/3+4/3y-2/3z: the mol ratio of A, B, RE is with step (1) gained compd A among the xRE
(1-x) 2SiO
4: 2xRE grinds with the nitride that contains the B element, mix and obtain mixture;
(3) in step (2), add in the mixture and account for amount of the mixture 2-4wt% catalyzer, under the protective atmosphere condition, carry out sintering;
(4) grinding, washing are taken out in step (3) sintered product cooling back, promptly get nitric oxide fluorescent powder A
1-xB
yO
zN
2/3+4/3y2/3z: xRE.
3. as the preparation method of a kind of rear-earth-doped nitrogen oxide fluorescent powder material as described in the claim 2, it is characterized in that the sintering in the described step (1) is meant: at protective gas N
2, Ar, H
2, N
2/ H
2, NH
3In one or more the condition of combination under, sintering temperature is at 1000 ℃-1300 ℃, the sintering process of sintering time 〉=3 hour.
4. as the preparation method of a kind of rear-earth-doped nitrogen oxide fluorescent powder material as described in the claim 2, it is characterized in that the sintering that carries out in the described step (3) is meant: protective gas N under the protective atmosphere condition
2, Ar, H
2, N
2/ H
2, NH
3In one or more the condition of combination under, sintering temperature 〉=1400 ℃, the sintering process of sintering time 〉=5 hour.
5. as the preparation method of a kind of rear-earth-doped nitrogen oxide fluorescent powder material as described in the claim 2, it is characterized in that the catalyzer in the described step (3) is H
3BO
3, NH
4The fluorochemical of Cl or A element.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321478A (en) * | 2011-06-13 | 2012-01-18 | 中国科学院长春光学精密机械与物理研究所 | Nitrogen oxide fluorescent powder and preparation method as well as application thereof |
| CN102533260A (en) * | 2011-12-29 | 2012-07-04 | 彩虹集团公司 | nitrogen oxide yellowgreen fluorescent powder for LED and preparation method for nitrogen oxide yellowgreen fluorescent powder |
| CN102807858A (en) * | 2012-07-25 | 2012-12-05 | 彩虹集团公司 | Method for preparing orange nitrogen oxide phosphor material |
| CN103589425A (en) * | 2013-09-24 | 2014-02-19 | 厦门通士达新材料有限公司 | Silicon-based nitric oxide green luminescent material for LEDs (Light Emitting Diode) and preparation method thereof |
| CN106463586A (en) * | 2014-05-30 | 2017-02-22 | Lg伊诺特有限公司 | Light-emitting device package containing oxynitride-based phosphor and lighting apparatus containing same |
| CN114621765A (en) * | 2022-03-31 | 2022-06-14 | 陕西师范大学 | Ce3+Nitrogen oxide doped single-matrix white fluorescent powder |
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| CN101775292A (en) * | 2010-02-23 | 2010-07-14 | 厦门大学 | Method for preparation of Eu-doped nitrogen oxide phosphor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321478A (en) * | 2011-06-13 | 2012-01-18 | 中国科学院长春光学精密机械与物理研究所 | Nitrogen oxide fluorescent powder and preparation method as well as application thereof |
| CN102533260A (en) * | 2011-12-29 | 2012-07-04 | 彩虹集团公司 | nitrogen oxide yellowgreen fluorescent powder for LED and preparation method for nitrogen oxide yellowgreen fluorescent powder |
| CN102807858A (en) * | 2012-07-25 | 2012-12-05 | 彩虹集团公司 | Method for preparing orange nitrogen oxide phosphor material |
| CN102807858B (en) * | 2012-07-25 | 2014-10-08 | 彩虹集团公司 | Method for preparing orange nitrogen oxide phosphor material |
| CN103589425A (en) * | 2013-09-24 | 2014-02-19 | 厦门通士达新材料有限公司 | Silicon-based nitric oxide green luminescent material for LEDs (Light Emitting Diode) and preparation method thereof |
| CN103589425B (en) * | 2013-09-24 | 2015-09-09 | 厦门通士达新材料有限公司 | A kind of LED silica-based oxynitride green luminescent material and preparation method thereof |
| CN106463586A (en) * | 2014-05-30 | 2017-02-22 | Lg伊诺特有限公司 | Light-emitting device package containing oxynitride-based phosphor and lighting apparatus containing same |
| CN106463586B (en) * | 2014-05-30 | 2019-05-03 | Lg伊诺特有限公司 | Light emitting device package comprising the fluorophor based on nitrogen oxides and the lighting device comprising it |
| CN114621765A (en) * | 2022-03-31 | 2022-06-14 | 陕西师范大学 | Ce3+Nitrogen oxide doped single-matrix white fluorescent powder |
| CN114621765B (en) * | 2022-03-31 | 2023-11-14 | 陕西师范大学 | Ce (cerium) 3+ Nitrogen oxide doped single-matrix white light fluorescent powder |
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Application publication date: 20101117 |