CN110698811B - Light conversion film capable of promoting plant growth and preparation method and application thereof - Google Patents
Light conversion film capable of promoting plant growth and preparation method and application thereof Download PDFInfo
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- CN110698811B CN110698811B CN201910833432.3A CN201910833432A CN110698811B CN 110698811 B CN110698811 B CN 110698811B CN 201910833432 A CN201910833432 A CN 201910833432A CN 110698811 B CN110698811 B CN 110698811B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 230000008635 plant growth Effects 0.000 title claims abstract description 23
- 230000001737 promoting effect Effects 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 67
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 39
- 239000000126 substance Substances 0.000 claims abstract description 39
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 239000011651 chromium Substances 0.000 claims description 82
- 229910052782 aluminium Inorganic materials 0.000 claims description 65
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 47
- 239000003292 glue Substances 0.000 claims description 39
- -1 aluminum compound Chemical class 0.000 claims description 29
- 229910052727 yttrium Inorganic materials 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910052684 Cerium Inorganic materials 0.000 claims description 15
- 229910019142 PO4 Inorganic materials 0.000 claims description 15
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 15
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 15
- 229910002651 NO3 Inorganic materials 0.000 claims description 13
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 13
- 239000010452 phosphate Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 11
- 229910052804 chromium Inorganic materials 0.000 claims description 11
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 150000001785 cerium compounds Chemical class 0.000 claims description 9
- 150000001845 chromium compounds Chemical class 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
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- 238000001816 cooling Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 5
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 5
- 238000007739 conversion coating Methods 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 3
- 239000006184 cosolvent Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 abstract description 10
- 238000000295 emission spectrum Methods 0.000 description 12
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- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 8
- 230000012010 growth Effects 0.000 description 8
- 239000004848 polyfunctional curative Substances 0.000 description 7
- OHVLMTFVQDZYHP-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CN1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O OHVLMTFVQDZYHP-UHFFFAOYSA-N 0.000 description 6
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 6
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- 239000002699 waste material Substances 0.000 description 3
- KZEVSDGEBAJOTK-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[5-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CC=1OC(=NN=1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O KZEVSDGEBAJOTK-UHFFFAOYSA-N 0.000 description 2
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920006266 Vinyl film Polymers 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 235000021466 carotenoid Nutrition 0.000 description 2
- 150000001747 carotenoids Chemical class 0.000 description 2
- 229930002875 chlorophyll Natural products 0.000 description 2
- 235000019804 chlorophyll Nutrition 0.000 description 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 150000002391 heterocyclic compounds Chemical class 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 230000002165 photosensitisation Effects 0.000 description 2
- 239000003504 photosensitizing agent Substances 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
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- 230000003595 spectral effect Effects 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
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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
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
- C09K11/68—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals containing chromium, molybdenum or tungsten
- C09K11/685—Aluminates; Silicates
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
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- 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
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Abstract
The invention discloses a light conversion film capable of promoting plant growth, and a preparation method and application thereof, wherein the light conversion film is Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film is made of Al 2 O 3 :Cr 3+ Phosphor powder, Y 3 Al 5 O 12 ：Ce 3+ The phosphor and polymer having a refractive index in the range of 1.45 to 1.65 are mixed in a ratio of 51: 9: 40-140, wherein Al is 2 O 3 :Cr 3+ Phosphor powder Al 1.98 O 3 :0.02Cr 3+ Preparation of the chemical formula (II) Y 3 Al 5 O 12 ：Ce 3+ Phosphor powder according to Y 2.94 Al 5 O 12 :0.06Ce 3+ The chemical expression of (1) is prepared. The invention has the advantages that: (1) the light conversion film can effectively convert white light in sunlight into deep red light, and the emission intensity of the deep red light is enhanced by 30% after the sunlight (visible light) irradiates; (2) the light conversion film is relatively low in price; (3) the light conversion film has stable chemical property and is not easy to decompose and oxidize under the condition of normal temperature.
Description
Technical Field
The invention relates to a light conversion film and a preparation method thereof, in particular to a light conversion film capable of promoting plant growth and a preparation method thereof, and belongs to the technical field of luminescent materials.
Background
Light is indispensable in the growth and development process of plants, and the regulation of light is one of important means for regulating the growth of plants. Photosynthesis of plants is mainly affected by chlorophyll and carotenoids, and secondly also by photosensitizing pigments, wherein chlorophyll absorbs light in the blue region (400nm-500nm), carotenoids absorb light in the red region (600nm-700nm), photosensitizing pigments absorb red light and light in the deep red region (650nm-750nm), while light in the red region (600nm-700nm) is the most influential to plant growth, light outside the red region is rarely absorbed, and the utilization rate of sunlight by plants during growth is low. Therefore, the improvement of the light utilization rate of the plants has important influence on the growth of the plants, and the improvement of the light energy utilization rate of the plants can greatly promote the growth speed of the plants and improve the yield.
The plant growth fluorescent powder is specially synthesized according to the growth requirement of plants. The traditional plant growth fluorescent powder is generally applied to LED plant growth lamps. In order to better promote the growth of economic crops, the LED plant growth lamp mainly adopts high-cost red fluorescent powder. However, the spectral curve of the LED plant growth lamp on the market at present has a large difference from the spectral curve absorbed by plant photosynthesis, the energy utilization rate of a light source is not high, and the LED chip is high in price and needs electricity, so that the planting cost of economic crops is increased indirectly. Although the LED plant growth lamp can improve the yield of cash crops, the LED plant growth lamp is difficult to be widely applied due to the low cost of common cash crops.
In addition to the use of LED plant growth lamps, there is a method of converting sunlight into red light to promote plant growth by covering plants with an organic red light emitting material such as a vinyl film containing a heterocyclic compound, like a conventional plant vinyl house. However, these organic red light emitting materials are chemically unstable in sunlight, and the emitted red light is attenuated within 3 months. In addition, the method for covering the plants by the film has the advantage that half of red light emitted by the film is emitted to the outside of the plants, so that the waste of the light is caused.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a light conversion film which is low in price, stable in light emission and capable of effectively converting white light in sunlight into deep red light so as to promote plant growth, and a preparation method and application thereof.
In order to achieve the above object, the present invention adopts the following technical solutions:
a light conversion coating capable of promoting plant growth, characterized in that the light conversion coating is Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film is made of Al 2 O 3 :Cr 3+ Phosphor powder, Y 3 Al 5 O 12 ：Ce 3+ Phosphors and polymers having refractive indices in the range of 1.45-1.65 are mixed in a ratio of 51: 9: 40-140, wherein Al is 2 O 3 :Cr 3+ Phosphor powder Al 1.98 O 3 :0.02Cr 3+ Preparation of the chemical formula (II) Y 3 Al 5 O 12 ：Ce 3+ Phosphor powder according to Y 2.94 Al 5 O 12 :0.06Ce 3+ The chemical expression of (1) is prepared.
The light conversion film capable of promoting plant growth is characterized in that the polymer with the refractive index in the range of 1.45-1.65 is AB glue, polycarbonate, polyacrylic resin or polyvinyl butyral, wherein the component of the AB glue is epoxy resin.
The light conversion film capable of promoting plant growth is characterized in that the mass ratio of the AB glue to the hardener is 1: 3.
The preparation method of the light conversion film capable of promoting plant growth is characterized by comprising the following steps of:
(1) according to Al 1.98 O 3 :0.02Cr 3+ Preparation of Al by chemical expression of 2 O 3 :Cr 3+ Fluorescent powder;
(2) according to Y 2.94 Al 5 O 12 :0.06Ce 3+ Preparation of Y by chemical expression of 3 Al 5 O 12 ：Ce 3+ Fluorescent powder;
(3) mixing Al 2 O 3 :Cr 3+ Phosphor powder, Y 3 Al 5 O 12 ：Ce 3+ Phosphors and polymers with refractive indices in the range of 1.45-1.65 are mixed in a ratio of 51: 9: 40-140, and uniformly stirring;
(4) placing the uniformly stirred mixture in a centrifuge for centrifugation;
(5) and uniformly coating the centrifuged mixture in a mould, drying and taking out the film from the mould.
The above production process is characterized in that, in the step (1), Al is added 1.98 O 3 :0.02Cr 3+ Preparation of Al by chemical expression of 2 O 3 :Cr 3+ The method of the fluorescent powder comprises the following steps:
(i) respectively weighing a first aluminum compound and a chromium compound according to the molar ratio of each chemical composition in a chemical expression, wherein the first aluminum compound is selected from aluminum oxide, aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing sulfate or aluminum-containing phosphate, and the chromium compound is selected from chromium oxide, chromium-containing hydroxide, chromium-containing nitrate, chromium-containing carbonate, chromium-containing sulfate or chromium-containing phosphate;
(ii) mixing the weighed first aluminum compound and chromium compound, and grinding to micron level;
(iii) calcining the ground powder at 1450 deg.C under nitrogen atmosphere, cooling to room temperature to obtain calcined substance, and grinding the calcined substance to obtain Al 2 O 3 :Cr 3+ And (3) powder.
The above production process, characterized in that, in the step (2), Y is added 2.94 Al 5 O 12 :0.06Ce 3+ Preparation of Y by chemical expression of 3 Al 5 O 12 ：Ce 3+ The method of the fluorescent powder comprises the following steps:
(i) respectively weighing a second aluminum compound, an yttrium compound and a cerium compound according to the molar ratio of each chemical composition in the chemical expression, wherein the second aluminum compound is selected from aluminum oxide, aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing carbonate, aluminum-containing sulfate or aluminum-containing phosphate, the yttrium compound is selected from yttrium oxide, yttrium-containing hydroxide, yttrium-containing nitrate, yttrium-containing carbonate, yttrium-containing sulfate or yttrium-containing phosphate, and the cerium compound is selected from cerium oxide, cerium-containing hydroxide, cerium-containing nitrate, cerium-containing carbonate, cerium-containing sulfate or cerium-containing phosphate;
(ii) mixing the weighed second aluminum compound, yttrium compound and cerium compound, and adding H 3 BO 3 Grinding to micron level as cosolvent;
(iii) calcining the ground powder at high temperature in the reducing atmosphere at 1480 ℃, cooling to room temperature along with the furnace to obtain a calcined substance, and grinding the calcined substance to obtain Y 3 Al 5 O 12 ：Ce 3+ And (3) powder.
The preparation method is characterized in that the reducing atmosphere is any one of the following three gases:
(a) ammonia gas;
(b) the mixed gas consists of hydrogen and nitrogen, and the volume percentage of the nitrogen is 75-95%;
(c) the mixed gas consists of carbon monoxide and nitrogen, and the volume percentage of the nitrogen is 75-95%.
The application of the light conversion film capable of promoting the growth of the plants is characterized in that the light conversion film is obliquely placed on two sides of the plants and is in an inverted 'splayed' shape.
The invention has the advantages that:
(1) by mixing Al 2 O 3 :Cr 3+ Phosphor and Y 3 Al 5 O 12 ：Ce 3+ The fluorescent powder is mixed, and the mixed powder can be excited in the widest visible region from light blue to dark orange under the sun, so thatStrong deep red emission is generated, so the Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film effectively converts white light in sunlight into deep red light, and the emission intensity of the deep red light is enhanced by 30% after the sunlight (visible light) is irradiated;
(2) the raw materials used for preparing the film are relatively low in price, and extra power supply is not needed in the planting process, so that the Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film is cheaper than the LED plant growth lamp;
(3) because of Al 2 O 3 :Cr 3+ And Y 3 Al 5 O 12 ：Ce 3+ The Al is chemically stable and is not easily decomposed and oxidized at normal temperature 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film has more stable luminescence and does not have the light attenuation condition like a vinyl film containing heterocyclic compounds;
(4) because of the whole Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion films are obliquely arranged on two sides of the plants and do not cover the plants, so that most of the deep red light generated by the light conversion films is emitted to the plants, and the waste of light is reduced;
(5) the Al provided by the invention 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The preparation method of the light conversion film adopts low-temperature calcination, and has the advantages of simple preparation method, no pollution and low cost.
Drawings
FIG. 1 shows Al obtained in example 1 2 O 3 :Cr 3+ XRD pattern of the phosphor;
FIG. 2 shows Al obtained in example 1 2 O 3 :Cr 3+ Excitation and emission spectrograms of the phosphor;
FIG. 3 is Y obtained in example 2 3 Al 5 O 12 ：Ce 3+ XRD pattern of the phosphor;
FIG. 4 is Y obtained in example 2 3 Al 5 O 12 ：Ce 3+ Excitation and emission spectrograms of the phosphor;
FIG. 5 shows Al obtained in example 1 2 O 3 :Cr 3+ Phosphor, Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A contrast graph of the emission intensity of the light conversion film excited at 400 nm;
FIG. 6 shows Al obtained in example 1 2 O 3 :Cr 3+ Phosphor, Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A comparison graph of the emission intensity of the light conversion film excited at 460 nm;
FIG. 7 shows Al obtained in example 1 2 O 3 :Cr 3+ Phosphor, Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Contrast graph of emission intensity of light conversion film excited at 550 nm;
FIG. 8 shows Al obtained in example 5 2 O 3 :Cr 3+ The emission patterns of the light conversion film excited at 400nm, 460nm and 550 nm;
FIG. 9 shows Al obtained in example 6 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The emission patterns of the light conversion film excited at 400nm, 460nm and 550 nm;
FIG. 10 shows the arrangement of Al according to the positional relationship between plants and the sun 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Schematic representation of a light conversion film.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
Example 1: preparation of Al 2 O 3 :Cr 3+ Fluorescent powder
According to Al 1.98 O 3 :0.02Cr 3+ Preparation of Al by chemical expression of 2 O 3 :Cr 3+ The fluorescent powder comprises the following specific components:
(1) respectively weighing a first aluminum compound and a chromium compound according to the molar ratio of each chemical composition in the chemical expression, wherein the first aluminum compound adopts aluminum oxide (Al) 2 O 3 ) Aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing sulfate or aluminum-containing phosphate, etc., and chromium oxide (C) as the chromium compound r2 O 3 ) Chromium-containing hydroxides, nitrates, carbonates, sulfates or phosphates;
(2) mixing the weighed first aluminum compound and chromium compound, and grinding to micron level;
(3) placing the ground powder in an alumina crucible, calcining at 1450 deg.C under nitrogen atmosphere for 6h, cooling to room temperature to obtain calcined substance, and grinding to obtain Al 2 O 3 :Cr 3+ And (3) powder.
In this example, we weighed 3.9396g of Al 2 O 3 And 0.0594g Cr 2 O 3 3.999g of Al was obtained 1.98 O 3 :0.02Cr 3+ And (3) powder.
The Al 1.98 O 3 :0.02Cr 3+ The XRD pattern of the powder is shown in figure 1. The peak shape and the peak position of each peak of the XRD spectrum are compared with a PDF card, and the following results are confirmed: the phase of the powder is Al 2 O 3 A single phase.
The Al 1.98 O 3 :0.02Cr 3+ The excitation and emission spectra of the powder are shown in figure 2. As can be seen from FIG. 2, the powder has two broad peaks in the excitation spectrum, the peak values of the excitation peaks are respectively located at 400nm and 550nm, and the emission spectrum has a narrow peak at 697 nm.
According to a spectrogram, the powder can be excited by light with the wavelength of 350-450 nm and 500-600nm, has a wide excitation area, and emits red light with the wavelength of about 697 nm.
Measuring the Al 1.98 O 3 :0.02Cr 3+ Emission spectra of the powder at 400nm, 460nm and 550nm for use.
Example 2: preparation of Y 3 Al 5 O 12 ：Ce 3+ Fluorescent powder
According to Y 2.94 Al 5 O 12 :0.06Ce 3+ Preparation of Y by chemical expression of 3 Al 5 O 12 ：Ce 3+ The fluorescent powder comprises the following specific components:
(1) respectively weighing a second aluminum compound, an yttrium compound and a cerium compound according to the molar ratio of each chemical composition in the chemical expression, wherein the second aluminum compound adopts aluminum oxide (Al) 2 O 3 ) Aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing carbonate, aluminum-containing sulfate or aluminum-containing phosphate, etc., and yttrium compound is yttrium oxide (Y) 2 O 3 ) Yttrium-containing hydroxide, yttrium-containing nitrate, yttrium-containing carbonate, yttrium-containing sulfate, yttrium-containing phosphate, etc., and cerium oxide (CeO) is used as the cerium compound 2 ) Cerium-containing hydroxides, cerium-containing nitrates, cerium-containing carbonates, cerium-containing sulfates, cerium-containing phosphates, or the like;
(2) mixing the weighed second aluminum compound, yttrium compound and cerium compound, and adding H 3 BO 3 Grinding to micron level as cosolvent;
(3) placing the ground powder in an alumina crucible, calcining at 1480 deg.C in reducing atmosphere (ammonia gas, 75-95% by volume of nitrogen gas, 75-95% by volume of carbon monoxide and nitrogen gas), cooling to room temperature to obtain calcined substance, and grinding to obtain Y 3 Al 5 O 12 ：Ce 3+ And (3) powder.
In this example, we have weighed 1.1117g Y 2 O 3 、0.0346g CeO 2 、0.8535g Al 2 O 3 、0.1g H 3 BO 3 (5 wt%) reduction atmosphere consisting of 95% by volume of nitrogen and 5% by volume of hydrogen, to obtain 2.0998g Y 2.94 Al 5 O 12 :0.06Ce 3+ And (3) powder.
The Y is 2.94 Al 5 O 12 :0.06Ce 3+ The XRD pattern of the powder is shown in FIG. 3. As can be seen from FIG. 3, the peak shape and position of each peak of the powder correspond to PDF card one by one, and no miscellaneous peak exists, thus proving that the phase of the powder is Y 3 Al 5 O 12 ：Ce 3+ Single phase (i.e. YAG: Ce) 3+ Single phase).
The Y is 2.94 Al 5 O 12 :0.06Ce 3+ The excitation and emission spectra of the powder are shown in figure 4. As can be seen from FIG. 4, the powder excitation spectrum has two peaks, the peaks are respectively at 323nm and 455nm, and under 455nm excitation, the emission spectrum has yellow light emission at 530 nm.
From the spectrogram we can find that Y is 2.94 Al 5 O 12 :0.06Ce 3+ The powder can absorb blue-green light and emit yellow light.
Example 3: preparation of Al 2 O 3 :Cr 3+ Light conversion film (AB glue content 54 wt%)
AB glue: the AB glue used in the invention is a mixture of two liquids, namely the glue, one liquid is a hardening agent, the two liquids can be hardened after mixing, the glue can be hardened without being hardened and cured by temperature, the glue is one of normal-temperature hardening glue, and the glue (A glue) comprises acrylic acid, epoxy, polyurethane and other components sold in the market.
Manufacturing a mold: two aluminum plates with flat, smooth and identical surfaces and sizes are prepared, a cavity, namely a rectangular groove, is formed in the surface of one aluminum plate, the size of the groove is the size of the light conversion film, and the depth of the groove is the thickness of the light conversion film.
0.25g of 0.25g A gum (stock gum) was weighed, and 0.85g of Al was added thereto 1.98 O 3 :0.02Cr 3+ Phosphor (prepared in example 1), then 0.75g of glue B (hardener) was added, the mixture was placed in a centrifuge and centrifuged at 16000rpm for 10minThe fluorescent powder and the AB glue are mixed evenly. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ A light conversion film.
Measuring the Al 2 O 3 :Cr 3+ And the light conversion film has the excited emission spectra at 400nm, 460nm and 550nm for standby.
Example 4: preparation of Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Light conversion film (AB glue content 50 wt%)
The mold prepared in example 3 was used.
0.25g of 0.25g A gum (stock gum) was weighed, and 0.85g of Al was added thereto 1.98 O 3 :0.02Cr 3+ Phosphor (from example 1) and 0.15g Y 2.94 Al 5 O 12 :0.06Ce 3+ Phosphor (prepared in example 2), then 0.75g of glue B (hardener) was added, the mixture was placed in a centrifuge and centrifuged at 16000rpm for 10min to mix the phosphor with glue AB. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A light conversion film.
Measuring the Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ And the light conversion film has the excited emission spectra at 400nm, 460nm and 550nm for later use.
Al obtained in example 1 2 O 3 :Cr 3+ Phosphor (abbreviated as powder), Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film (abbreviated as Al film) and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Light conversion film (abbreviated as Al (YAG) film)A comparison of the emission intensity of the excitation at 400nm is shown in FIG. 5.
Al obtained in example 1 2 O 3 :Cr 3+ Phosphor (abbreviated as powder), Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film (abbreviated as Al film) and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A comparison of the emission intensity of the light conversion film (abbreviated as Al (YAG) film) excited at 460nm is shown in FIG. 6.
Al obtained in example 1 2 O 3 :Cr 3+ Phosphor (abbreviated as powder), Al obtained in example 3 2 O 3 :Cr 3+ Light conversion film (abbreviated as Al film) and Al obtained in example 4 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A comparison of the emission intensity of the light conversion film (abbreviated as Al (YAG) film) excited at 550nm is shown in FIG. 7.
As can be seen from fig. 5, 6 and 7, the luminous intensity is significantly improved after the powder is mixed with the AB glue to form the light conversion film. This is related to the total reflection of light. After the fluorescent powder is excited, the emitted light is totally reflected with probability when entering air from the fluorescent powder, and Al 1.98 O 3 :0.02Cr 3+ Refractive index n of phosphor 2 About 1.58, refractive index n of air 1 About 1, when the incident angle of the emitted light is larger than arcsin (1/1.58), i.e. 39 ° 15', the emitted light will be totally reflected in the powder and cannot enter the air, so the emission intensity of the phosphor is low. In the light conversion film, Al is contained 1.98 O 3 :0.02Cr 3+ The phosphor powder is wrapped by AB glue, and the refractive index n of the AB glue 3 About 1.55 (higher), so total reflection only occurs when the angle of incidence of the emitted light is greater than arcsin (1.55/1.58), i.e., 78 deg. 49'. And when the emitted light enters the air from the AB glue, the reflectivity of the vertical and interface light is R ═ 1.55-1)/(1.55+1)) 2 The transmittance of light emitted from the light conversion film is higher than that of the phosphor, and thus the light emission intensity in the light conversion film is higher than that in the phosphor. In Al 2 O 3 :Cr 3+ Mixing Y into fluorescent powder 3 Al 5 O 12 ：Ce 3+ After the fluorescent powder and the AB glue are prepared into a film, the peak value of an emission spectrum excited at 550nm is improved, so that the absorption of the light conversion film to visible light is increased, and the growth of plants is facilitated.
Based on the above analysis, other polymers having refractive indices in the range of 1.45-1.65, such as: polycarbonate, polyacrylic resin, polyvinyl butyral, etc., may be substituted for the AB glue.
Example 5: preparation of Al 2 O 3 :Cr 3+ Light conversion film (AB glue content 73 wt%)
The mold prepared in example 3 was used.
0.35g A gum (stock gum) was weighed, and 0.51g of Al was added thereto 1.98 O 3 :0.02Cr 3+ Phosphor (prepared in example 1), then 1.05g of glue B (hardener) was added, the mixture was placed in a centrifuge and centrifuged at 16000rpm for 10min to mix the phosphor with glue AB. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ A light conversion film.
The Al 2 O 3 :Cr 3+ The emission spectra of the light conversion film at 400nm, 460nm and 550nm are shown in FIG. 8.
Example 6: preparation of Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Light conversion film (AB glue content 70 wt%)
The mold prepared in example 3 was used.
0.35g A gum (stock gum) was weighed, and 0.51g of Al was added thereto 1.98 O 3 :0.02Cr 3+ Phosphor (from example 1) and 0.09g Y 2.94 Al 5 O 12 :0.06Ce 3+ Phosphor (from example 2) was added with 1.05g of glue B (hardener), the mixture was centrifuged at 16000rpm for 10min to mix the phosphor with glue ABAnd (4) uniformity. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A light conversion film.
The Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The emission spectra of the light conversion film at 400nm, 460nm and 550nm are shown in FIG. 9.
As can be seen from FIGS. 8 and 9, Al produced in example 6 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Emission intensities excited at 460nm and 550nm of the light conversion film relative to Al obtained in example 5 2 O 3 :Cr 3+ The light conversion film is greatly improved. This is due to Y 3 Al 5 O 12 ：Ce 3+ The fluorescent powder has strong excitation in blue region and can emit strong green light, yellow light or orange light, and its emission peak is in contact with Al 2 O 3 :Cr 3+ The strong and wide excitation peaks of the fluorescent powder at the wavelength of 500-600nm are overlapped to generate energy transfer, so that Al is enabled to be 2 O 3 :Cr 3+ The intensity of the deep red light emission produced by the phosphor increases.
Example 7: preparation of Al 2 O 3 :Cr 3+ A mold prepared in example 3 was used as a light conversion film (AB glue content: 44 wt%).
0.20g of 0.20g A gum (stock gum) was weighed, and 1.02g of Al was added thereto 1.98 O 3 :0.02Cr 3+ Phosphor (from example 1) was added with 0.60g of glue B (hardener), and the mixture was centrifuged at 16000rpm for 10min to mix the phosphor with the glue AB. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ A light conversion film.
In comparison with example 5, in example 7, when a light conversion film was produced, the same raw materials as those used in example 5 were used except that the proportions of the raw materials were different from each other, and this did not affect the light emission properties of the finished light conversion film. The emission spectra of the light conversion film obtained in example 7 at 400nm, 460nm and 550nm were detected to be consistent with those of FIG. 8.
EXAMPLE 8 preparation of Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ Light conversion film (AB glue content 40 wt%)
The mold prepared in example 3 was used.
Weigh 0.20A gum (stock gum) and add 1.02 to it 1.98 O 3 :0.02Cr 3+ Phosphor (from example 1) and 0.18Y 2.94 Al 5 O 12 :0.06Ce 3+ Phosphor (prepared in example 2), then 0.60g of glue B (hardener) was added, the mixture was placed in a centrifuge and centrifuged at 16000rpm for 10min to mix the phosphor with glue AB. Uniformly coating the centrifuged mixture in the grooves of an aluminum plate, covering and pressing the aluminum plate with another aluminum plate after the grooves are filled and leveled, putting the mold into an oven, baking at 50 ℃ for 6 hours, and taking out the dried film from the mold to obtain Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ A light conversion film.
In comparison with example 6, in example 8, when a light conversion film was produced, the same raw materials as those used in example 6 were used except that the proportions of the raw materials were different from each other, and this did not affect the light emission properties of the finished light conversion film. The emission spectra of the light conversion film obtained in example 8 at 400nm, 460nm, and 550nm were detected to be consistent with those of FIG. 9.
Al prepared by the method provided by the invention 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film was used in the method shown in FIG. 10. Whole Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film is obliquely arranged on two sides of the plant, is in an inverted splayed shape and is not covered on the plantOn the plants, most of the deep red light generated by the plants is emitted to the plants, so that the waste of light is reduced, and the growth of the plants is accelerated.
It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the protection scope of the present invention.
Claims (1)
1. A light conversion coating capable of promoting plant growth, characterized in that the light conversion coating is Al 2 O 3 :Cr 3+ Mixed Y 3 Al 5 O 12 ：Ce 3+ The light conversion film is made of Al 2 O 3 :Cr 3+ Phosphor powder, Y 3 Al 5 O 12 ：Ce 3+ Phosphor and polymer with refractive index 1.55 were mixed at 51: 9: 40-140, wherein Al is 2 O 3 :Cr 3+ Phosphor powder Al 1.98 O 3 :0.02Cr 3+ Preparation of the chemical formula (II) Y 3 Al 5 O 12 ：Ce 3+ Phosphor powder according to Y 2.94 Al 5 O 12 :0.06Ce 3+ Preparing the chemical expression of (1);
the polymer with the refractive index of 1.55 is AB glue, and the components of the AB glue are epoxy resin:
the mass ratio of the main glue to the hardening agent of the AB glue is 1: 3;
the preparation method of the light conversion film comprises the following steps:
(1) according to Al 1.98 O 3 :0.02Cr 3+ Preparation of Al by chemical expression of 2 O 3 :Cr 3+ Fluorescent powder;
(2) according to Y 2.94 Al 5 O 12 :0.06Ce 3+ Preparation of Y by chemical expression of 3 Al 5 O 12 ：Ce 3+ Fluorescent powder;
(3) mixing Al 2 O 3 :Cr 3+ Phosphor powder, Y 3 Al 5 O 12 ：Ce 3+ Phosphor and polymer with refractive index 1.55 were mixed in a 51: 9: 40-140 mass ratioAdding the components together;
(4) placing the mixture in a centrifuge for centrifuging to uniformly mix the fluorescent powder and the polymer;
(5) uniformly coating the centrifuged mixture in a mould, drying and taking out the film from the mould;
in step (1), as Al 1.98 O 3 :0.02Cr 3+ Preparation of Al by chemical expression of 2 O 3 :Cr 3+ The method of the fluorescent powder comprises the following steps:
(i) respectively weighing a first aluminum compound and a chromium compound according to the molar ratio of each chemical composition in a chemical expression, wherein the first aluminum compound is selected from aluminum oxide, aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing sulfate or aluminum-containing phosphate, and the chromium compound is selected from chromium oxide, chromium-containing hydroxide, chromium-containing nitrate, chromium-containing carbonate, chromium-containing sulfate or chromium-containing phosphate;
(ii) mixing the weighed first aluminum compound and chromium compound, and grinding to micron level;
(iii) calcining the ground powder at 1450 deg.C under nitrogen atmosphere, cooling to room temperature to obtain calcined substance, and grinding the calcined substance to obtain Al 2 O 3 :Cr 3+ Powder;
in step (2), according to Y 2.94 Al 5 O 12 :0.06Ce 3+ Preparation of Y by chemical expression of 3 Al 5 O 12 ：Ce 3+ The method of the fluorescent powder comprises the following steps:
(i) respectively weighing a second aluminum compound, an yttrium compound and a cerium compound according to the molar ratio of each chemical composition in the chemical expression, wherein the second aluminum compound is selected from aluminum oxide, aluminum-containing hydroxide, aluminum-containing nitrate, aluminum-containing carbonate, aluminum-containing sulfate or aluminum-containing phosphate, the yttrium compound is selected from yttrium oxide, yttrium-containing hydroxide, yttrium-containing nitrate, yttrium-containing carbonate, yttrium-containing sulfate or yttrium-containing phosphate, and the cerium compound is selected from cerium oxide, cerium-containing hydroxide, cerium-containing nitrate, cerium-containing carbonate, cerium-containing sulfate or cerium-containing phosphate;
(ii) will callMixing the second aluminum compound, yttrium compound and cerium compound with H 3 BO 3 Grinding to micron level as cosolvent;
(iii) calcining the ground powder at high temperature in the reducing atmosphere at 1480 ℃, cooling to room temperature along with the furnace to obtain a calcined substance, and grinding the calcined substance to obtain Y 3 Al 5 O 12 ：Ce 3+ Powder;
the reducing atmosphere is any one of the following three gases:
(a) ammonia gas;
(b) the mixed gas consists of hydrogen and nitrogen, and the volume percentage of the nitrogen is 75-95%;
(c) the mixed gas consists of carbon monoxide and nitrogen, and the volume percentage of the nitrogen is 75-95%;
the light conversion film is obliquely placed on two sides of the plant and is in an inverted 'splayed' shape.
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| CN112538257B (en) * | 2020-12-28 | 2022-06-03 | 甘肃颐年聚光科技有限责任公司 | Light conversion film for glass greenhouse capable of promoting plant growth and preparation method thereof |
| CN112542538B (en) * | 2020-12-28 | 2022-07-05 | 甘肃颐年聚光科技有限责任公司 | Fluorescent powder composition capable of promoting rapid growth of algae and application thereof |
| CN113402744B (en) * | 2021-05-06 | 2022-11-08 | 甘肃颐年聚光科技有限责任公司 | Light conversion film capable of promoting plant growth and preparation method and application thereof |
| CN113248926B (en) * | 2021-05-06 | 2023-11-24 | 甘肃颐年商贸有限责任公司 | Red light conversion film capable of promoting plant growth and preparation method thereof |
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