Deep red fluorescent powder, and preparation method and application thereof

A phosphor, deep red technology, applied in the field of deep red phosphor and its preparation, can solve the problem of less research on the deep red light emission area, and achieve the effects of easy industrial production, easy availability of raw materials, and simple preparation method.

Active Publication Date: 2018-11-16
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the light-emitting area of ​​red phosphors used in LED plant growth lights is mainly concentrated at 620-700nm, and there are few studies on the deep red light emission area greater than 700nm

Method used

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  • Deep red fluorescent powder, and preparation method and application thereof
  • Deep red fluorescent powder, and preparation method and application thereof
  • Deep red fluorescent powder, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A deep red phosphor, the chemical formula of which is: Y 3-X La X al 5 o 12 : Mn, when x=0.1, that is, the chemical formula of the phosphor is Y 2.9 La 0.1 al 5 o 12 :Mn.

[0029] Follow Y 2.9 La 0.1 al 5 o 12 : Mn stoichiometric ratio Weigh yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, then weigh citric acid, wherein the mol ratio of yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, citric acid is 2.9:0.1:0.01: 4.99:9.6, add citric acid into water until it is completely dissolved to make an aqueous solution of citric acid; dissolve yttrium oxide and lanthanum oxide in concentrated nitric acid with a mass fraction of 68% until they are completely dissolved to make a rare earth nitrate solution; Manganese carbonate, rare earth nitrate solution and aluminum nitrate were dissolved in citric acid solution and the pH value was adjusted to neutral with ammonia water. Put it in an 80°C water bath and stir continuously u...

Embodiment 2

[0033] A deep red phosphor, the chemical formula of which is: Y 3-X La X al 5 o 12 : Mn, when x=0.15, that is, the chemical formula of the phosphor is Y 2.85 La 0.15 al 5 o 12 :Mn.

[0034] Follow Y 2.85 La 0.15 al 5 o 12 : Mn stoichiometric ratio Weigh yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, then weigh citric acid, wherein the mol ratio of yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, citric acid is 2.85:0.15:0.01: 4.99:9.6, add citric acid into water until it is completely dissolved to make an aqueous citric acid solution; dissolve yttrium oxide and lanthanum oxide in concentrated nitric acid with a mass fraction of 68% until they are completely dissolved to make a rare earth nitrate solution. Dissolve manganese carbonate, rare earth nitrate solution and aluminum nitrate in citric acid solution in turn and adjust the pH value to neutral with ammonia water. Put it in an 80°C water bath and stir continuously u...

Embodiment 3

[0038] A deep red phosphor, the chemical formula of which is: Y 3-X La X al 5 o 12 : Mn, when x=0.45, that is, the chemical formula of the phosphor is Y 2.55 La 0.45 al 5 o 12 :Mn.

[0039] Follow Y 2.55 La 0.45 al 5 o 12: Mn stoichiometric ratio Weigh yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, then weigh citric acid, wherein the mol ratio of yttrium oxide, lanthanum oxide, manganese carbonate, aluminum nitrate, citric acid is 2.55:0.45:0.01: 4.99:9.6. Add citric acid into water until it is completely dissolved to make an aqueous citric acid solution; dissolve yttrium oxide and lanthanum oxide in concentrated nitric acid with a mass fraction of 68% until they are completely dissolved to make a rare earth nitrate solution; Salt and aluminum nitrate were dissolved in aqueous citric acid and the pH was adjusted to neutral with ammonia. Put it in an 80°C water bath and stir continuously until a transparent gel is formed. The gel was dried ...

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Abstract

The invention discloses deep red fluorescent powder, and a preparation method and application thereof. The chemical formula of the fluorescent powder is Y<3-X>La<X>Al<5>O<12>:Mn, wherein the x is greater than 0 and less than 3. The preparation method of the deep red fluorescent powder provided by the invention is a sol-gel method, and the prepared fluorescent powder can be excited by an ultraviolet ray with a wavelength range of 280-400 nm, and emits red light with a wavelength of 630-750 nm. When the deep red fluorescent powder is applied to an LED plant growth light, the light loss of an existing LED plant growth light in the region of deep red light is covered, so that the growth of plants is promoted, and the growth period of the plants is effectively shortened. The preparation methodis simple, is easy to operate and has a high controllability degree, the obtained fluorescent powder is stable in performance, the raw materials are easy to obtain and are low in cost, and the red fluorescent powder is easy for industrial production.

Description

technical field [0001] The invention relates to the field of fluorescent powder for plant growth light source LED lamps and the preparation thereof, in particular to a deep red fluorescent powder and a preparation method and application thereof. Background technique [0002] Light environment is one of the important physical environmental factors indispensable to plant growth and development. Only about 5% of the solar radiation spectrum affects photosynthesis, and the blue light with a wavelength of 420-500nm and the red light with a wavelength of 620-750nm contribute the most to photosynthesis. Among them, red light can significantly accelerate the development of plants, promote the accumulation of dry matter, the formation of bulbs, roots, leaf balls and other plant organs, cause early flowering and fruiting of plants, and play a leading role in plant color enhancement. [0003] At present, the light-emitting area of ​​red phosphors used in LED plant growth lights is mai...

Claims

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Application Information

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IPC IPC(8): C09K11/80A01G7/04
CPCA01G7/045C09K11/7774Y02P60/14
Inventor 贺明睿王岩松肖林久
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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