Mn <4+> activated aluminophosphate red fluorescent powder, preparation method thereof and application of preparation method in plant growth light emitting diode

A technology of red fluorescent powder and aluminum phosphate, applied in the direction of botanical equipment and methods, applications, luminescent materials, etc., can solve the problems of low luminous efficiency and poor thermal stability

Active Publication Date: 2020-11-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome in above-mentioned prior art, transition metal ion Mn 4+ The doped red phosphor has the disadvantages of low luminous efficiency and poor thermal stability, providing a Mn 4+ Activated aluminophosphate red phosphor, preparation method thereof and application in plant growth light-emitting diodes

Method used

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  • Mn &lt;4+&gt; activated aluminophosphate red fluorescent powder, preparation method thereof and application of preparation method in plant growth light emitting diode
  • Mn &lt;4+&gt; activated aluminophosphate red fluorescent powder, preparation method thereof and application of preparation method in plant growth light emitting diode
  • Mn &lt;4+&gt; activated aluminophosphate red fluorescent powder, preparation method thereof and application of preparation method in plant growth light emitting diode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to CaAl 12-0.75x (PO 4 ) m o 19-1.5m :xMn 4+ (0.001≤x≤0.15, 0.01≤m≤1.0) in the stoichiometric ratio of Mn, Al, Ca, P, weigh manganese carbonate 0.0012g, aluminum hydroxide 0.9354g, calcium carbonate 0.1000g and ammonium dihydrogen phosphate 0.0063g, the raw materials were mixed and placed in an agate mortar, 1ml of absolute ethanol was added and ground, and the obtained mixture was placed in a muffle furnace for calcination under an air atmosphere at a calcination temperature of 1450°C and a calcination time of 3h. After the calcination is finished, wait for it to cool naturally to room temperature, take out the sample and grind it finely, and seal it up for later use to obtain a kind of Mn 4+ Activated aluminophosphate red phosphor.

[0035] Taking the aluminophosphate red fluorescent powder of Example 1 as an example for experimental verification, the results are as follows:

[0036] The aluminophosphate red fluorescent powder prepared in embodiment 1 ...

Embodiment 2

[0042] According to CaAl 12-0.75x (PO 4 ) m o 19-1.5m :xMn 4+ For the stoichiometric ratio of Mn, Al, Ca, and P in (0.001≤x≤0.15, 0.01≤m≤1.0), respectively weigh 0.003g of manganese acetate, 1.227g of aluminum oxide, 0.120g of calcium carbonate, and 0.0071g of phosphoric acid. Mix the weighed medicines in an agate mortar, add 2ml of absolute ethanol and grind them. The obtained mixture is calcined in an air atmosphere in a muffle furnace. The calcining temperature is 1400° C. and the calcining time is 4 hours. After the calcination, it is naturally cooled to room temperature and ground evenly to obtain a Mn 4+ Activated aluminophosphate red phosphor.

Embodiment 3

[0044] According to CaAl 12-0.75x (PO 4 ) m o 19-1.5m :xMn 4+ The stoichiometric ratio of Mn, Al, Ca, P in (0.001≤x≤0.15, 0.01≤m≤1.0), weighed manganese dioxide MnO 2 0.0015g, aluminum nitrate 4.4920g, calcium oxide 0.056g, ammonium dihydrogen phosphate 0.0076g. Mix the weighed medicines in an agate mortar, add 3ml of absolute ethanol and then grind. The obtained mixture is calcined in an air atmosphere in a muffle furnace. The calcining temperature is 1300° C. and the calcining time is 6 hours. After the calcination, it is naturally cooled to room temperature and ground evenly to obtain a Mn 4+ Activated aluminophosphate red phosphor.

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Abstract

The invention discloses Mn <4+> activated aluminophosphate red fluorescent powder and application of a preparation method of the Mn <4+> activated aluminophosphate red fluorescent powder in a plant growth light-emitting diode, and belongs to the technical field of light-emitting materials. A compound containing Al <3+>, a compound containing Ca <2+> and a compound containing P <5+> are used as rawmaterials, a compound containing Mn <4+> is used as an activator, and the Mn <4+> activated aluminophosphate red fluorescent powder is prepared by an improved high-temperature solid-phase method. Thepreparation method has the advantages of easily available raw materials, simple process, convenient operation, low preparation cost and environmental protection; and a prepared sample has the advantages of excellent luminescence property, high color purity and good stability. The Mn <4+> activated aluminophosphate red fluorescent powder can be widely applied to lighting and display devices and plant growth light-emitting diodes, is especially suitable for white light LEDs based on Mn <4+> ions, and is a promising red light-emitting material.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials and relates to a Mn 4+ Activated aluminophosphate red phosphor, preparation method thereof and application in plant growth light emitting diodes. Background technique [0002] White light-emitting diodes (WLEDs), as a new generation of solid-state lighting sources, have been widely used in different lighting systems worldwide due to their advantages of high brightness, low energy consumption, small size, high durability, and environmental friendliness. Currently, commercial WLEDs combine blue LED chips with yellow-emitting (Y,Gd) 3 (Al,Ga) 5 o 12 : Ce 3+ (YAG:Ce) phosphor, but due to insufficient red light, WLEDs have low color rendering index (CRI) and high color temperature (CCT), which limits its practical application. Therefore, in order to improve the color rendering index of the device and reduce the color temperature, it is necessary to enrich the red region of the spectr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71A01G7/04H01L33/50
CPCC09K11/717A01G7/04H01L33/502Y02B20/00Y02P60/14
Inventor 樊国栋张晗李楠苏肖彦
Owner SHAANXI UNIV OF SCI & TECH
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