CN113061433A - Method for manufacturing phosphor material and lighting equipment - Google Patents
Method for manufacturing phosphor material and lighting equipment Download PDFInfo
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- CN113061433A CN113061433A CN202110287056.XA CN202110287056A CN113061433A CN 113061433 A CN113061433 A CN 113061433A CN 202110287056 A CN202110287056 A CN 202110287056A CN 113061433 A CN113061433 A CN 113061433A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 43
- 239000004005 microsphere Substances 0.000 claims abstract description 38
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 24
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 24
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000000725 suspension Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011241 protective layer Substances 0.000 claims abstract description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004381 surface treatment Methods 0.000 claims abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000002243 precursor Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 230000008020 evaporation Effects 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910052909 inorganic silicate Inorganic materials 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 4
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 claims description 4
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims description 2
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 claims description 2
- IWICDTXLJDCAMR-UHFFFAOYSA-N trihydroxy(propan-2-yloxy)silane Chemical compound CC(C)O[Si](O)(O)O IWICDTXLJDCAMR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 238000012742 biochemical analysis Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
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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
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—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
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- 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
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7795—Phosphates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
Abstract
The invention discloses a method for manufacturing a phosphor material and a lighting device, wherein the method comprises the following steps: selecting phosphor particles, and carrying out surface treatment on the phosphor particles; mixing ethanol, ammonia water and deionized water, adding the mixture into a precursor, stirring and reacting for 8-12h at the rotating speed of 400-600rpm, separating and washing to obtain the nano SiO2Micro-sphere particles, and then mixing the nano SiO2Dispersing the microsphere particles in 3-8 times of water to obtain nano SiO2A microsphere suspension; will be provided withPhosphor particles and nano SiO2The microsphere suspension is mixed and evenly stirred according to the mass ratio of 4:1-1:1.5, the moisture is removed through low-temperature evaporation drying at 40-60 ℃, and then the heat treatment at 500-550 ℃ is carried out in protective atmosphere, so as to obtain the phosphor material coated with the protective layer. The phosphor material adopts nano SiO2The microsphere particles are used as a coating protective layer, the protective layer is uniform and compact, the influence of hydrothermal environment on the phosphor material is obviously reduced on the premise of ensuring good light emitting and light transmitting performances, the brightness maintenance of the phosphor material is facilitated, and the service life of the phosphor material is prolonged.
Description
Technical Field
The invention relates to the technical field of fluorescent materials, in particular to a method for manufacturing a fluorescent material and lighting equipment.
Background
The fluorescent material is prepared by mixing metal (zinc, chromium) sulfide or rare earth oxide with trace amount of active agent and calcining. Colorless or light white, which can show visible light (400-800 nm) of various colors according to the types and contents of metals and activators in the pigment under the irradiation of ultraviolet light (200-400 nm). With the progress of science and technology, people have more and more researches on fluorescent materials, and the application range of fluorescent materials is wider and wider. Besides being used as dye, the fluorescent substance can be widely applied to the fields of organic pigment, optical brightening agent, photo-oxidant, paint, chemical and biochemical analysis, solar energy catcher, anti-counterfeiting mark, medicine tracing, laser and the like.
However, when the conventional phosphor material is used, the emission characteristics, such as luminance, are deteriorated when the phosphor material is exposed to water or a hot environment for a long period of time. The prior technical research shows that the ceramic microsphere particles (silicate and aluminosilicate) are adopted to coat and protect the phosphor material, so that the reduction trend of the luminescence property can be slowed down to a certain extent. However, the viscosity of the ceramic microsphere particles is too high, and the thickness is not uniform when a protective layer is formed; in addition, the ceramic microsphere particles have poor permeability, and the overall brightness level of the fluorescent material is reduced.
Disclosure of Invention
The invention aims to provide a method for manufacturing a fluorescent material and lighting equipment, which solve the problem that the existing fluorescent material is easily influenced by water and heat environment to cause the reduction of light-emitting characteristics when in use.
The invention realizes the purpose through the following technical scheme:
a method for preparing a phosphor material comprises the steps of
The method comprises the following steps: selecting phosphor particles, and carrying out surface treatment on the phosphor particles;
step two: mixing ethanol, ammonia water and deionized water, adding the mixture into a precursor, stirring and reacting for 8-12h at the rotating speed of 400-600rpm, separating and washing to obtain the nano SiO2The number of the microsphere particles is less than the number of the microsphere particles,then the nano SiO is put into2Dispersing the microsphere particles in 3-8 times of water to obtain nano SiO2A microsphere suspension;
step three: the phosphor particles obtained in the step one and the nano SiO obtained in the step two2The microsphere suspension is mixed and evenly stirred according to the mass ratio of 4:1-1:1.5, the moisture is removed through low-temperature evaporation drying at 40-60 ℃, and then the heat treatment at 500-550 ℃ is carried out in protective atmosphere, so as to obtain the phosphor material coated with the protective layer.
In a further improvement, the phosphor particles are selected from Y3Al5O12:Ce3+Yellow phosphor, BaMgAl10O17Eu blue phosphor, (Ba, Ca, Sr)2SiO4Eu green phosphor and YPVO4One kind of Eu red phosphor.
The further improvement is that the surface treatment method is electromagnetic stirring, mechanical stirring or ultrasonic cleaning.
In a further improvement, the precursor is selected from one of methyl orthosilicate, tetraethyl orthosilicate, isopropyl orthosilicate or butyl orthosilicate.
The further improvement is that in the second step, ultrasonic dispersion is carried out for 20min every 1-3h in the stirring reaction process.
The further improvement is that, preferably, the phosphor particles are mixed with nano SiO2And mixing the microsphere suspension according to the mass ratio of 2:1 and uniformly stirring.
In a further improvement, the protective atmosphere is a nitrogen atmosphere or an argon atmosphere.
An illumination apparatus comprising an excitation light source and a phosphor material, wherein the phosphor material is produced by the above production method.
The invention has the beneficial effects that: the phosphor material adopts nano SiO2The microsphere particles are used as a coating protective layer, the protective layer is uniform and compact, the influence of hydrothermal environment on the phosphor material is obviously reduced on the premise of ensuring good light emitting and light transmitting performances, the brightness maintenance of the phosphor material is facilitated, and the service life of the phosphor material is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a phosphor material;
FIG. 2 is a Scanning Electron Microscope (SEM) photograph of a phosphor material obtained in example 2;
FIG. 3 is a Scanning Electron Microscope (SEM) photograph of a phosphor material obtained in comparative example 1;
in the figure: 100. a phosphor material; 200. and a protective layer.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
A method for preparing a phosphor material comprises the steps of
The method comprises the following steps: selecting Y3Al5O12:Ce3+Phosphor particles of a yellow phosphor, the phosphor particles being subjected to surface treatment by electromagnetic stirring;
step two: mixing ethanol, ammonia water and deionized water, adding methyl orthosilicate, stirring and reacting for 12h at the rotating speed of 400rpm, performing ultrasonic dispersion for 20min every 1h in the stirring and reacting process, and separating and washing to obtain nano SiO2Micro-sphere particles, and then mixing the nano SiO2Dispersing the microsphere particles in 3 times of water to obtain the nano SiO2A microsphere suspension;
step three: the phosphor particles obtained in the step one and the nano SiO obtained in the step two2The microsphere suspension was mixed and stirred uniformly at a mass ratio of 4:1, evaporated and dried at a low temperature of 40 ℃ to remove moisture, and then heat-treated at 500 ℃ in a nitrogen atmosphere, thereby obtaining a phosphor material 100 coated with a protective layer 200 (see fig. 1).
Example 2
A method for preparing a phosphor material comprises the steps of
Step (ii) ofFirstly, the method comprises the following steps: selecting (Ba, Ca, Sr)2SiO4Phosphor particles of a Eu green phosphor, the phosphor particles being subjected to surface treatment by mechanical stirring;
step two: mixing ethanol, ammonia water and deionized water, adding tetraethyl orthosilicate, stirring and reacting for 10h at the rotating speed of 500rpm, performing ultrasonic dispersion for 20min every 2h in the stirring reaction process, and separating and washing to obtain nano SiO2Micro-sphere particles, and then mixing the nano SiO2Dispersing the microsphere particles in 6 times of water to obtain the nano SiO2A microsphere suspension;
step three: the phosphor particles obtained in the step one and the nano SiO obtained in the step two2And mixing the microsphere suspension according to the mass ratio of 2:1, uniformly stirring, evaporating and drying at the low temperature of 50 ℃ to remove water, and performing heat treatment at the temperature of 520 ℃ in an argon atmosphere to obtain the phosphor material coated with the protective layer.
Example 3
A method for preparing a phosphor material comprises the steps of
The method comprises the following steps: selecting Y3Al5O12:Ce3+Carrying out surface treatment on phosphor particles of a yellow phosphor by adopting ultrasonic cleaning;
step two: mixing ethanol, ammonia water and deionized water, adding n-butyl silicate, stirring at 600rpm for 8h, performing ultrasonic dispersion every 3h for 20min during stirring reaction, separating, and washing to obtain nanometer SiO2Micro-sphere particles, and then mixing the nano SiO2Dispersing the microsphere particles in 8 times of water to obtain the nano SiO2A microsphere suspension;
step three: the phosphor particles obtained in the step one and the nano SiO obtained in the step two2And mixing the microsphere suspension according to the mass ratio of 1:1.5, uniformly stirring, evaporating and drying at the low temperature of 60 ℃ to remove water, and performing heat treatment at the temperature of 550 ℃ in a nitrogen atmosphere to obtain the phosphor material coated with the protective layer.
Comparative example 1
It is essentially the same as the procedure of example 2, with the only difference thatIn the following steps: mixing nano SiO2The microsphere suspension is replaced by ceramic microsphere suspension with equal mass concentration, the ceramic microsphere suspension is prepared by dispersing ceramic microspheres in 6 times of water, and the ceramic microspheres and nano SiO2The particle size of the microsphere particles is equal.
Comparative example 2
Selecting (Ba, Ca, Sr)2SiO4Phosphor particles of the Eu green phosphor are not coated and are used as a phosphor material.
The phosphor material obtained in example 2 was subjected to electron microscope scanning, and the scanning result is shown in fig. 2, and the phosphor material obtained in comparative example 1 was subjected to electron microscope scanning, and the scanning result is shown in fig. 3. It can be seen that the protective layer particles of the phosphor material prepared in example 2 are significantly more uniformly and densely distributed, and the corresponding overall protection effect is better.
The phosphor materials obtained in the above examples 1 to 3 and comparative examples 1 and 2 were subjected to performance tests, which included initial relative luminance, relative luminance after 80% humidity environment (3000h), and relative luminance after 200 ℃ environment (2000 h). Here, the relative brightness refers to a relative value when the initial brightness of comparative example 3 is set to 100%.
The test results are statistically as follows:
as can be seen from the above table, the initial luminance of the phosphor materials prepared in examples 1 to 3 of the present invention is consistent with that of the phosphor materials without the protective layer, indicating that the protective layer has excellent light transmittance, so that the overall luminance level of the phosphor materials is not reduced, while that of comparative example 1 is reduced to some extent; in addition, in terms of brightness performance after an 80% humidity environment (3000h) and after a 200 ℃ environment (2000h), examples 1 to 3 were able to maintain a higher brightness level, with a significantly smaller decrease compared to comparative examples 1 and 2. Therefore, the invention can obviously reduce the influence of hydrothermal environment on the phosphor material, is beneficial to maintaining the brightness of the phosphor material and prolongs the service life of the phosphor material.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A method for producing a phosphor material, characterized by comprising: comprises the steps of
The method comprises the following steps: selecting phosphor particles, and carrying out surface treatment on the phosphor particles;
step two: mixing ethanol, ammonia water and deionized water, adding the mixture into a precursor, stirring and reacting for 8-12h at the rotating speed of 400-600rpm, separating and washing to obtain the nano SiO2Micro-sphere particles, and then mixing the nano SiO2Dispersing the microsphere particles in 3-8 times of water to obtain nano SiO2A microsphere suspension;
step three: the phosphor particles obtained in the step one and the nano SiO obtained in the step two2The microsphere suspension is mixed and evenly stirred according to the mass ratio of 4:1-1:1.5, the moisture is removed through low-temperature evaporation drying at 40-60 ℃, and then the heat treatment at 500-550 ℃ is carried out in protective atmosphere, so as to obtain the phosphor material coated with the protective layer.
2. The method for producing a phosphor material according to claim 1, wherein: the phosphor particles are selected from Y3Al5O12:Ce3+Yellow phosphor, BaMgAl10O17Eu blue phosphor, (Ba, Ca, Sr)2SiO4Eu green phosphor and YPVO4One kind of Eu red phosphor.
3. The method for producing a phosphor material according to claim 1, wherein: the surface treatment method is electromagnetic stirring, mechanical stirring or ultrasonic cleaning.
4. The method for producing a phosphor material according to claim 1, wherein: the precursor is selected from one of methyl orthosilicate, tetraethyl orthosilicate, isopropyl orthosilicate or butyl orthosilicate.
5. The method for producing a phosphor material according to claim 1, wherein: and in the second step, ultrasonic dispersion is carried out for 20min every 1-3h in the stirring reaction process.
6. The method for producing a phosphor material according to claim 1, wherein: preferably, the phosphor particles are mixed with nano SiO2And mixing the microsphere suspension according to the mass ratio of 2:1 and uniformly stirring.
7. The method for producing a phosphor material according to claim 1, wherein: the protective atmosphere is a nitrogen atmosphere or an argon atmosphere.
8. An illumination device, characterized by: comprising an excitation light source and a phosphor material, wherein the phosphor material is produced by the method of any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116836698A (en) * | 2023-05-11 | 2023-10-03 | 安徽工业大学 | Silicon dioxide long afterglow luminescent material, preparation method, anti-counterfeiting coating and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116836698A (en) * | 2023-05-11 | 2023-10-03 | 安徽工业大学 | Silicon dioxide long afterglow luminescent material, preparation method, anti-counterfeiting coating and application |
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