CN111471458A - Composite fluorescent powder for exciting white light L ED and preparation and use method thereof - Google Patents
Composite fluorescent powder for exciting white light L ED and preparation and use method thereof Download PDFInfo
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- CN111471458A CN111471458A CN202010324977.4A CN202010324977A CN111471458A CN 111471458 A CN111471458 A CN 111471458A CN 202010324977 A CN202010324977 A CN 202010324977A CN 111471458 A CN111471458 A CN 111471458A
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- 239000000843 powder Substances 0.000 title claims abstract description 84
- 239000002131 composite material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 21
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 18
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 16
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 15
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 51
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 229910001940 europium oxide Inorganic materials 0.000 claims description 4
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010074 rubber mixing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7734—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/0883—Arsenides; Nitrides; Phosphides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0008—Processes
- H01L2933/0033—Processes relating to semiconductor body packages
- H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The invention provides a composite fluorescent powder for exciting white light L ED and a preparation and use method thereof, which comprises the steps of 101 weighing Al and europium, S102 tabletting Al and europium, S103 ammonia filling treatment of a pressed finished product, S104 nitrogen filling treatment of the pressed finished product, S105 cooling the fluorescent powder to obtain a finished product, S201 mixing nano amorphous silicon nitride powder and red fluorescent powder, S202 granulating the composite fluorescent powder, S203 mixing the composite fluorescent powder with rubber, and S204 gluing the composite fluorescent powder on a L ED chip.
Description
Technical Field
The invention belongs to the technical field of L ED lamp white light fluorescent powder, and particularly relates to composite fluorescent powder for exciting white light L ED and a preparation and use method thereof.
Background
In recent years, with the gradual increase of the light emitting efficiency and the gradual decrease of the cost of a light emitting diode (L ED), L ED is a novel blue environment-friendly solid-state illumination light source, which is a solid-state semiconductor material capable of converting electric energy into visible light, and compared with other light sources, L ED has the advantages of energy saving, safety, long service life, low energy consumption, less heat generation, high brightness, water resistance, shock resistance, easy dimming, light beam concentration, convenient maintenance and the like, and has become an inevitable trend in modern illumination development and the future, and white light L ED is called "21 st century blue light source.
The light emitting diode is composed of a PN junction as common diodes, and also has unidirectional conductivity. When a forward voltage is applied to the light emitting diode, holes injected from the P region to the N region and electrons injected from the N region to the P region recombine with the electrons in the N region and the holes in the P region within a few micrometers near the PN junction, respectively, and spontaneous emission fluorescence is generated. The energy states of electrons and holes are different in different semiconductor materials. The more energy is released, the shorter the wavelength of light emitted, the more energy is released when electrons and holes recombine. Diodes emitting red, green or yellow light are commonly used. The reverse breakdown voltage of the light emitting diode is greater than 5 volts. Its forward current-voltage characteristic is very steep and in use a current limiting resistor must be connected in series to control the current through the diode.
In the PN junction of some semiconductor materials, when injected minority carriers and majority carriers are combined, the excess energy is released in the form of light, so that the electric energy is directly converted into light energy.
In addition, the invention is a composite fluorescent powder for UV excited white light L ED, which is invented and invented by Chinese patent publication No. CN 107384383A. europium-doped aluminum nitride-based red fluorescent powder, terbium-doped aluminum nitride-based green fluorescent powder and dysprosium-doped aluminum nitride-based blue fluorescent powder are mixed according to a reasonable proportion, and are coated on the surface of a L ED chip to prepare white light L ED, and the white light is generated by ultraviolet excitation.
However, the existing composite phosphor for exciting white light L ED has the problems of uneven particle size distribution of phosphor particles and lower luminous efficiency.
Therefore, it is very necessary to invent a composite phosphor for exciting white light L ED and a preparation and use method thereof.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite phosphor for exciting white light L ED and a preparation and use method thereof, so as to solve the problems of uneven particle size distribution and lower luminous efficiency of the existing composite phosphor for exciting white light L ED and the preparation and use method thereof.
A composite fluorescent powder for exciting white light L ED is prepared from nano-class non-crystal silicon nitride powder and europium doped aluminium nitride-base red fluorescent powder.
Preferably, the preparation method of the europium-doped aluminum nitride-based red fluorescent powder specifically comprises the following steps:
s101: weighing Al and europium;
s102: performing tabletting treatment on Al and europium;
s103: filling ammonia gas into the tabletting finished product;
s104: filling nitrogen into the finished tablet;
s105: and cooling the fluorescent powder to obtain the fluorescent powder.
Preferably, in steps S101 and S102, the Al and the europium oxide are weighed according to the molar ratio of Al to europium of 1 (0.02-0.05), mixed uniformly, and tabletted.
Preferably, in steps S103 and S104, the tablets are placed into a reaction furnace which is vacuumized and filled with nitrogen, ammonia with the purity of 99% is introduced into the reaction furnace, the reaction furnace is heated to 800-.
Preferably, in step S105, the cooling is natural cooling, so as to obtain the red phosphor.
Preferably, the thickness of the pressed sheet is 0.5-1.5 mm.
Preferably, the flow rate of the introduced ammonia gas is 0.3-0.5L/min.
Preferably, the nitrogen is introduced at a rate of 0.2 to 0.8L/min.
Preferably, the preparation and use method of the composite phosphor for exciting white light L ED specifically comprises the following steps:
s201: mixing the nano amorphous silicon nitride powder and the red fluorescent powder;
s202: granulating the composite fluorescent powder;
s203: mixing the compound fluorescent powder with rubber;
and S204, gluing the composite fluorescent powder on an L ED chip.
Preferably, in steps S201 and S202, the nano amorphous silicon nitride powder and the phosphor powder are put into a high-speed pounder and stirred for granulation to obtain the composite phosphor powder.
Preferably, in step S203, the composite phosphor and the heat-conducting paste are added to a rubber mixing mill for mixing at a mixing temperature of 120-.
Preferably, in step S204, after fixing the L ED chip on the base, encapsulating and pouring fluorescent glue into the L ED bracket, so that the fluorescent glue covers the L ED chip, standing the bracket on a horizontal plane for 40-55 minutes, and attaching the composite phosphor to the surface of the L ED chip by gravity, a L ED lamp emitting white light by using the composite phosphor can be obtained.
Preferably, the weight percentage of the nano amorphous silicon nitride powder in the composite fluorescent powder is 35-45%.
Compared with the prior art, the preparation method has the advantages of simplicity, reasonableness, low preparation cost, high purity, low oxygen content, high activity, energy consumption reduction and high color purity of the fluorescent powder by taking the aluminum nitride as the fluorescent powder base material, preparing the fluorescent glue after the nano amorphous silicon nitride powder and the fluorescent powder are stirred and granulated to obtain the composite fluorescent powder, covering the fluorescent glue on an L ED chip, enabling the composite fluorescent powder to be attached to the surface of a L ED chip through gravity, achieving high refractive index and high light transmittance, protecting a L ED chip to increase the luminous flux of L ED, being low in viscosity, easy to bubble, suitable for encapsulation and compression molding, and enabling L ED to have better durability and reliability.
Drawings
FIG. 1 is a flow chart of the preparation method of the europium-doped aluminum nitride-based red fluorescent powder of the invention.
FIG. 2 is a flow chart of the preparation and application method of the composite phosphor for exciting white light L ED according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
the invention provides a raw material of composite fluorescent powder for exciting white light L ED, which comprises nano amorphous silicon nitride powder and fluorescent powder, wherein the fluorescent powder is europium-doped aluminum nitride-based red fluorescent powder.
As shown in fig. 1, in the above embodiment, specifically, the preparation method of the europium-doped aluminum nitride-based red phosphor specifically includes the following steps:
s101: weighing Al and europium;
s102: performing tabletting treatment on Al and europium;
s103: filling ammonia gas into the tabletting finished product;
s104: filling nitrogen into the finished tablet;
s105: and cooling the fluorescent powder to obtain the fluorescent powder.
In the above embodiment, specifically, in steps S101 and S102, the Al and the europium oxide are weighed according to the molar ratio of the Al to the europium of 1:0.02, mixed uniformly, and tabletted.
In the above embodiment, specifically, in steps S103 and S104, the tablet is placed into a reaction furnace that is vacuumized and filled with nitrogen, ammonia gas with a purity of 99% is introduced into the reaction furnace, the reaction furnace is heated to 800 ℃, heat preservation and nitridation are performed for 1 hour, a nitrided product is obtained, the ammonia gas in the reaction furnace is converted into 99% nitrogen gas, and the temperature is continuously raised to 1200 ℃ for solid solution and heat preservation for 1 hour.
In the above embodiment, specifically, in step S105, the cooling is natural cooling, so as to obtain the red phosphor.
In the above embodiment, specifically, the thickness of the tablet is 0.8 mm.
In the above embodiment, specifically, the flow rate of the ammonia gas introduced is 0.4L/min.
In the above embodiment, specifically, the nitrogen gas is introduced at a rate of 0.5L/min.
In the above embodiment, as shown in fig. 2, in particular, the preparation and use method of the composite phosphor for exciting white light L ED specifically includes the following steps:
s201: mixing the nano amorphous silicon nitride powder and the red fluorescent powder;
s202: granulating the composite fluorescent powder;
s203: mixing the compound fluorescent powder with rubber;
and S204, gluing the composite fluorescent powder on an L ED chip.
In the above embodiment, specifically, in steps S201 and S202, the nano amorphous silicon nitride powder and the phosphor powder are put into a high-speed pounder and stirred for granulation to obtain the composite phosphor powder.
In the above embodiment, specifically, in step S203, the composite phosphor and the thermally conductive paste are added to a mixing mill at a weight ratio of 1: 3.5 for mixing at 125 ℃ for 25 minutes, and the mixture is uniformly mixed and then vacuumed until no bubbles are visible, thereby obtaining the phosphor paste.
In the above embodiment, specifically, in step S204, after fixing the L ED chip on the base, encapsulating the fluorescent glue into the L ED bracket, so that the fluorescent glue covers the L ED chip, standing the bracket for 45 minutes on a horizontal plane, and attaching the composite phosphor to the surface of the L ED chip by gravity, a L ED lamp emitting white light by using the composite phosphor can be obtained.
In the above embodiment, specifically, the weight percentage of the nano amorphous silicon nitride powder in the composite phosphor is 35%.
Example 2:
the invention provides a raw material of composite fluorescent powder for exciting white light L ED, which comprises nano amorphous silicon nitride powder and fluorescent powder, wherein the fluorescent powder is europium-doped aluminum nitride-based red fluorescent powder.
As shown in fig. 1, in the above embodiment, specifically, the preparation method of the europium-doped aluminum nitride-based red phosphor specifically includes the following steps:
s101: weighing Al and europium;
s102: performing tabletting treatment on Al and europium;
s103: filling ammonia gas into the tabletting finished product;
s104: filling nitrogen into the finished tablet;
s105: and cooling the fluorescent powder to obtain the fluorescent powder.
In the above embodiment, specifically, in steps S101 and S102, the Al and the europium oxide are weighed according to the molar ratio of Al to europium of 1:0.03, and are uniformly mixed and tabletted.
In the above embodiment, specifically, in steps S103 and S104, the tablet is placed into a reaction furnace that is vacuumized and filled with nitrogen, ammonia gas with a purity of 99% is introduced into the reaction furnace, the reaction furnace is heated to 900 ℃, and is subjected to heat preservation and nitridation for 1.5 hours to obtain a nitrided product, the ammonia gas in the reaction furnace is converted into 99% nitrogen gas, and the temperature is continuously raised to 1300 ℃ to perform solid solution and heat preservation for 1.5 hours.
In the above embodiment, specifically, in step S105, the cooling is natural cooling, so as to obtain the red phosphor.
In the above embodiment, specifically, the thickness of the tablet is 1 mm.
In the above embodiment, specifically, the flow rate of the ammonia gas introduced is 0.5L/min.
In the above embodiment, specifically, the nitrogen gas is introduced at a rate of 0.5L/min.
In the above embodiment, as shown in fig. 2, in particular, the preparation and use method of the composite phosphor for exciting white light L ED specifically includes the following steps:
s201: mixing the nano amorphous silicon nitride powder and the red fluorescent powder;
s202: granulating the composite fluorescent powder;
s203: mixing the compound fluorescent powder with rubber;
and S204, gluing the composite fluorescent powder on an L ED chip.
In the above embodiment, specifically, in steps S201 and S202, the nano amorphous silicon nitride powder and the phosphor powder are put into a high-speed pounder and stirred for granulation to obtain the composite phosphor powder.
In the above embodiment, specifically, in step S203, the composite phosphor and the thermally conductive paste are added to a mixing mill at a weight ratio of 1: 3.5 for mixing at 120 ℃ for 30 minutes, and the mixture is uniformly mixed and then vacuumed until no bubbles are visible, thereby obtaining the phosphor paste.
In the above embodiment, specifically, in step S204, after fixing the L ED chip on the base, encapsulating the fluorescent glue into the L ED bracket, so that the fluorescent glue covers the L ED chip, standing the bracket on a horizontal plane for 40 minutes, and attaching the composite phosphor to the surface of the L ED chip by gravity, a L ED lamp emitting white light by using the composite phosphor can be obtained.
In the above embodiment, specifically, the weight percentage of the nano amorphous silicon nitride powder in the composite phosphor is 25%.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The composite phosphor powder for exciting white light L ED is characterized in that raw materials of the composite phosphor powder for exciting white light L ED comprise nano amorphous silicon nitride powder and phosphor powder, wherein the phosphor powder is europium-doped aluminum nitride-based red phosphor powder.
2. The composite phosphor for exciting white light L ED according to claim 1, wherein the preparation method of said europium-doped aluminum nitride-based red phosphor specifically comprises the steps of:
s101: weighing Al and europium;
s102: performing tabletting treatment on Al and europium;
s103: filling ammonia gas into the tabletting finished product;
s104: filling nitrogen into the finished tablet;
s105: and cooling the fluorescent powder to obtain the fluorescent powder.
3. The method of claim 2, wherein in steps S101 and S102, Al and europium oxide are weighed according to a molar ratio of Al to europium of 1 (0.02-0.05), mixed uniformly, and pressed into tablets.
4. The method of claim 2, wherein in steps S103 and S104, the pressed sheet is placed into a reaction furnace which is evacuated and filled with nitrogen, ammonia with a purity of 99% is introduced into the reaction furnace, the reaction furnace is heated to 800-.
5. The composite phosphor for exciting white light L ED and the preparation and use method thereof according to claim 1, wherein the thickness of the pressed sheet is 0.5-1.5 mm.
6. The composite phosphor for exciting white light L ED as claimed in claim 1, wherein the flow rate of ammonia gas is 0.3-0.5L/min.
7. The composite phosphor for exciting white light L ED and the preparation and use method thereof according to claim 1, wherein the method comprises the following steps:
s201: mixing the nano amorphous silicon nitride powder and the red fluorescent powder;
s202: granulating the composite fluorescent powder;
s203: mixing the compound fluorescent powder with rubber;
and S204, gluing the composite fluorescent powder on an L ED chip.
8. The compound phosphor of L ED excited by white light as claimed in claim 7, and the preparing and using method thereof, wherein in steps S201 and S202, the nano amorphous silicon nitride powder and the phosphor are put into a high speed pounder to be stirred and granulated to obtain the compound phosphor.
9. The composite phosphor of L ED exciting white light as claimed in claim 7, and the preparation and use method thereof, wherein in step S203, the composite phosphor and the heat conductive adhesive are added to a mixing mill for mixing at a weight ratio of 1: 3.5, the mixing temperature is 120-130 ℃, the mixing time is 20-35 minutes, and the phosphor is obtained after uniform mixing and vacuum till no bubbles are seen.
10. The phosphor and method of claim 7, wherein in step S204, after L ED chips are fixed on the substrate, fluorescent glue is encapsulated into L ED frame, so that L ED chips are covered by fluorescent glue, and left standing for 40-55 minutes in horizontal plane, and the phosphor is attached to L ED chips by gravity, so as to obtain L ED lamp source emitting white light.
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| CN202010324977.4A CN111471458A (en) | 2020-04-23 | 2020-04-23 | Composite fluorescent powder for exciting white light L ED and preparation and use method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517017A (en) * | 2011-12-09 | 2012-06-27 | 苏州晶能科技有限公司 | Phosphor and its preparation method and white LED plane light source containing phosphor |
| CN105932142A (en) * | 2016-06-02 | 2016-09-07 | 安徽众博新材料有限公司 | White LED (Light-Emitting Diode) nano-phosphor powder |
| CN107384383A (en) * | 2017-08-18 | 2017-11-24 | 苏州轻光材料科技有限公司 | A kind of compound fluorescent material of UV excited white lights LED |
-
2020
- 2020-04-23 CN CN202010324977.4A patent/CN111471458A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517017A (en) * | 2011-12-09 | 2012-06-27 | 苏州晶能科技有限公司 | Phosphor and its preparation method and white LED plane light source containing phosphor |
| CN105932142A (en) * | 2016-06-02 | 2016-09-07 | 安徽众博新材料有限公司 | White LED (Light-Emitting Diode) nano-phosphor powder |
| CN107384383A (en) * | 2017-08-18 | 2017-11-24 | 苏州轻光材料科技有限公司 | A kind of compound fluorescent material of UV excited white lights LED |
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