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Aluminate light conversion agent, preparation method thereof, and light conversion film containing the aluminate light conversion agent

A light-converting agent and aluminate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of easy hydrolysis and photolysis, rapid intensity decay, and reduced luminous intensity, and achieve simple preparation methods and light transmittance. Small, the effect of increasing the luminous intensity

Active Publication Date: 2018-11-13
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth light conversion agents with organic ligands have good light conversion performance, but their fluorescence lifetime is short, their intensity decays quickly, and their luminous intensity decreases significantly after long-term use. Dye-based light-transforming agents have good compatibility with resins, but most of them are prone to oxidation and decomposition, and their service life is not long. The absorption and conversion efficiency of sunlight is not high, which affects the light transmittance of agricultural film; The chemical properties of the light agent are unstable, easy to hydrolyze and photolyze

Method used

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  • Aluminate light conversion agent, preparation method thereof, and light conversion film containing the aluminate light conversion agent
  • Aluminate light conversion agent, preparation method thereof, and light conversion film containing the aluminate light conversion agent
  • Aluminate light conversion agent, preparation method thereof, and light conversion film containing the aluminate light conversion agent

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preparation example Construction

[0034] The preparation method of the above-mentioned aluminate light-changing agent includes the following steps: fully grind and mix metal oxides, nano-metal oxides, alkaline earth salts, activators and fluxes evenly, add them into a crucible, and then place them in a high-temperature furnace to carry out the procedure Heating and cooling: 1) Heat up to 250-350°C at a heating rate of 5-10°C / min, and react at a constant temperature for 20-40 minutes; 2) Heat up to 1500-1600°C at a heating rate of 5-10°C / min, React for 2-4 hours; 3) Cool down to 500-600° C. at a cooling rate of 3-8° C. / min, then cool naturally to room temperature, and take out the furnace to obtain an aluminate light converting agent.

[0035] Preferably, the mass ratio of the metal oxide and the nanometer metal oxide is 1:(0.25-4).

[0036] Preferably, the ratio of the amount of alkaline earth salts to the total amount of metal oxides and nano metal oxides is 1: (0.25-4).

[0037] Preferably, the mass of the ...

Embodiment 1

[0061] Embodiment 1: Aluminate light conversion agent CaAl 12 o 19 :Mn 4+

[0062] 1) Raw materials for production:

[0063] The production raw materials of samples 1 to 7 are shown in Table 1:

[0064] Table 1 Production raw material composition table of samples 1 to 7

[0065]

[0066]

[0067] 2) Production process:

[0068] Will Al 2 o 3 , Nano Al 2 o 3 , CaCO 3 , MnCO 3 , MgF 2 Weigh it with KF according to the ratio in Table 1, grind it thoroughly and mix it evenly, put it into a crucible, put it in a high-temperature furnace, and carry out program heating and cooling: 1) raise the temperature to 300°C at a heating rate of 5°C / min, and react at a constant temperature for 30 minutes; 2) Raise the temperature to 1550°C at a heating rate of 10°C / min, and react at a constant temperature for 3 hours; 3) Cool down to 550°C at a cooling rate of 8°C / min, then cool naturally to room temperature, and take out the furnace to obtain an aluminate light-changing agen...

Embodiment 2

[0074] The excitation spectrum and emission spectrum of the aluminate light conversion agent sample 4 prepared in this embodiment are as follows figure 1 As shown, the SEM image is shown in figure 2 shown. Depend on figure 1 Known: aluminate light conversion agent CaAl 12 o 19 :Mn 4+ The absorption peaks of sample 4 are located at 382nm and 468nm, and the aluminate light conversion agent CaAl is excited by light with wavelengths of 382nm and 468nm 12 o 19 :Mn 4+ For sample 4, the strongest emission peaks are located at 655nm. Embodiment 2: Aluminate light conversion agent CaAl 12 o 19 :Mn 4+

[0075] 1) Raw materials for production

[0076] The production raw materials of samples 1 to 7 are shown in Table 3:

[0077] Table 3 Production raw material composition table of samples 1 to 7

[0078]

[0079] 2) Production process

[0080] Will Al 2 o 3 , Nano Al 2 o 3 , CaCO 3 , Mn 3 o 4 , MgF 2 Weigh it with KF according to the ratio in Table 3, grind it t...

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Abstract

The invention discloses an aluminate light conversion agent and a preparation method thereof as well as a light conversion film containing the aluminate light conversion agent. The general formula of the aluminate light conversion agent is A1-xZnxAl12O19: Mn<4+>, wherein A is at least one of Ca<2+>, Sr<2+> and Ba<2+> and x is more than or equal to 0 and less than 1. The preparation method comprises the following steps: sufficiently grinding metal oxide, nano metal oxide, alkaline-earth salt, an activating agent and a fluxing agent, and uniformly mixing; adding a mixture into a crucible; putting the crucible into a high-temperature furnace; and carrying out program temperature rising and cooling to obtain the aluminate light conversion agent. The light conversion film containing the aluminate light conversion agent is prepared from the following raw materials in parts by mass: 100 parts of a thin film matrix, 8-45 parts of a master batch matrix, 0.5-10 parts of the aluminate light conversion agent, 0.15-0.3 part of a lubricating agent, 0.5-1.5 parts of a light stabilizer and 0.3-1.5 parts of an antioxygen. The aluminate light conversion agent disclosed by the invention has the advantages of high light emitting strength, high light conversion efficiency, good stability, long service life and simple preparation method; the adding amount in an agricultural thin film is small, and the aluminate light conversion agent has good compatibility with the thin film matrix and has less influences on light transmittance of the thin film.

Description

technical field [0001] The invention relates to an aluminate light converting agent, a preparation method thereof and a light converting film containing the aluminate light converting agent, belonging to the technical field of functional materials. Background technique [0002] Photosynthesis is the basis for the survival of plants, and more than 90% of the dry matter weight of crops comes from photosynthesis. However, not all wavelengths of light in sunlight can be used by plants. Generally, only light with a wavelength of 400-480nm (blue light zone) and 600-680nm (red-orange zone) can be absorbed by chlorophyll in plants for photosynthesis. The light conversion agent can convert the ultraviolet light and green light that plants cannot use in sunlight into blue-violet light and red-orange light that plants need for growth, which can effectively improve the light conditions of crops, make full use of solar energy, and reduce the use of pesticides and chemical fertilizers , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/24C08L23/06C08L23/12C08L29/04C08L27/06C08L25/06C08L69/00C08L23/08C08L33/12C08K13/02C08K5/20C08K5/098C08K5/09C09K11/64
CPCC08J5/18C08K3/24C08L23/06C08L23/08C08L23/12C08L25/06C08L27/06C08L29/04C08L33/12C08L69/00C08L2203/16C09K11/64C08L23/0853C08K13/02C08K5/20C08K5/098C08K5/09
Inventor 刘晓瑭刘华鼐胡广齐刘应亮
Owner SOUTH CHINA AGRI UNIV
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