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Light color adjustable valence alternation manganese ion doped aluminate luminescent material and preparation method thereof

A technology of luminescent materials and manganese ions, which is applied in luminescent materials, chemical instruments and methods, sustainable buildings, etc., can solve the problems of expensive raw materials, high cost, and unfavorable large-scale process production, and achieve low prices and ease the shortage of supply. The pressure, easy to operate the effect

Inactive Publication Date: 2015-05-27
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(C.K.Chang, T.M.Chena, "White light generation under violet-blue excitation from tunable green-to-red emitting Ca 2 MgSi 2 o 7 : Eu, Mnthrough energy transfer," Appl. Phys. Lett. 90, 2007, 161901; Y.H.Won, H.S.Jang, W.B.Im, D.Y.Jeong, and J.S.Lee," Tunable full-color-emitting La 0.827 Al 11.9 o 19.09 :Eu 2+ ,Mn 2+ for application to warm white-light-emitting diodes,"Appl.Phys.Lett.89(23), 2006, 231909(1-3); N.Guo, Y.J.Huang, M.Yang, Y.H.Song, Y.H.Zheng, and H.P.You, "A tunable single-component warm white-light Sr 3 Y(PO 4 ) 3 :Eu 2+ ,Mn 2+ Phosphor for white-light emitting diodes," Phys.Chem.Chem.Phys.13, 2011, 15077-15082.) Such materials require synthesis in a reducing atmosphere to obtain low-priced Mn 2+ with Eu 2+ , where Eu 2+ ingredients are very expensive
Make the cost very high, not conducive to large-scale process production

Method used

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  • Light color adjustable valence alternation manganese ion doped aluminate luminescent material and preparation method thereof
  • Light color adjustable valence alternation manganese ion doped aluminate luminescent material and preparation method thereof
  • Light color adjustable valence alternation manganese ion doped aluminate luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to CaCO 3 : Al 2 o 3 :MnO 2 : Bi(NO 3 ) 3 ·5H 2 O=0.99:12:0.5%:0.01 molar ratio, accurately weigh 0.9900g (0.0099mol) of solid calcium carbonate CaCO with an electronic balance 3 (analytical pure), 6.1176g (0.06mol) solid alumina Al 2 o 3 (analytically pure), 0.0043g (0.00005mol) solid manganese dioxide MnO 2 (analytically pure), and 0.0485g (0.0001mol) bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O (analytically pure), fully grind in an agate mortar for 40 minutes, and mix well to obtain a mixture. Under air conditions, put the mixture in a muffle furnace at 800°C for 5 hours, take it out after cooling, and grind it again for 10 minutes to obtain a precursor, put the precursor in the air at 1500°C for 3 hours, and take it out after cooling. Instant product. Using the Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.) to study its luminescence properties, it was observed that the product emitted Mn under the excitation of a 396nm xenon lamp 2+ T...

Embodiment 2

[0034] According to CaCO 3 : Al 2 o 3 :MnO 2 : Bi(NO 3 ) 3 ·5H 2 O=0.97:12:0.5%:0.03 molar ratio, accurately weigh 0.9700g (0.0097mol) solid calcium carbonate CaCO with an electronic balance 3 (analytical pure), 6.1176g (0.06mol) solid alumina Al 2 o 3 (analytically pure), 0.0043g (0.00005mol) solid manganese dioxide MnO 2 (analytical pure), and 0.1454g (0.0003mol) bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O (analytically pure), fully grind in an agate mortar for 30 minutes, and mix well to obtain a mixture. Under air conditions, put the mixture in a muffle furnace at 900°C for 5 hours, take it out after cooling, and grind it again for 10 minutes to obtain a precursor, put the precursor in the air at 1300°C for 3 hours, and take it out after cooling. Instant product. Using the Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.) to study its luminescence properties, it was observed that the product emitted Mn under the excitation of a 396nm xenon lamp 2+ The wa...

Embodiment 3

[0036] According to CaCO 3 : Al 2 o 3 :MnO 2 : Bi(NO 3 ) 3 ·5H 2 O=0.93:12:0.5%:0.07 molar ratio, accurately weigh 0.9300g (0.0093mol) solid calcium carbonate CaCO with an electronic balance 3 (analytical pure), 6.1176g (0.06mol) solid alumina Al 2 o 3 (analytically pure), 0.0043g (0.00005mol) solid manganese dioxide MnO 2 (analytically pure), and 0.33915g (0.0007mol) bismuth nitrate Bi(NO 3 ) 3 ·5H 2O (analytically pure), fully grind in an agate mortar for 10 minutes, and mix well to obtain a mixture. Under air conditions, put the mixture in a muffle furnace at 1000°C for 5 hours, take it out after cooling, and grind it again for 20 minutes to obtain a precursor, put the precursor in the air at 1300°C for 3 hours, and take it out after cooling. Instant product. Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.) was used to study its luminescent performance. Under the excitation of 396nm xenon lamp, the product emitted strong green light at 500-550nm a...

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Abstract

The invention discloses a light color adjustable valence alternation manganese ion doped aluminate luminescent material and a preparation method thereof. The chemical composition of the material is shown as Ca1-jAl12O19:iMnx+,jLn<3+>, wherein Ln is one of La<3+>, Bi<3+>, Sm<3+>, Nd<3+> and Tm<3+>; i is more than or equal to 0.01 percent and less than or equal to 1.0 percent, j is more than 1 percent and less than or equal to 7.0 percent, and x is equal to 2 or 4. A high-temperature solid phase method is adopted by the preparation method; and the preparation method comprises the following steps of: fully grinding the solid raw materials and uniformly mixing the ground raw materials according to a stoichiometric proportion; sintering by two steps by the high-temperature solid phase method; and cooling to obtain the product. Manganese ions are automatically reduced in air through charge compensation. The material can emit red light or green light and or red light and green light when exposed under ultraviolet rays. The light color of the material can be regulated by the concentration of trivalent doped ions and valance states of manganese ions, and the material is suitable for two-primary color and three-primary color white light-emitting diodes (LEDs).

Description

technical field [0001] The invention relates to a luminescent material, in particular to a variable-valence manganese ion-doped aluminate synthesized in air with adjustable light color and a preparation method. It specifically relates to a variable-valence manganese ion-doped aluminate luminescent material that can be effectively excited by near-ultraviolet and blue LED chips, and through the method of co-doping and charge compensation, regulates the valence state of manganese ions, and realizes the adjustable light color of the material and the material. Preparation. Background technique [0002] White light LEDs are highly valued by people because of their incomparable advantages such as energy saving, environmental protection, beauty and long life. At present, among the three main ways to realize the new white light LED light source, the earliest is to install the chips of three different colors of red, blue and green together, and use three driving power supplies to rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCY02B20/00
Inventor 潘跃晓卢静王稼国叶欣涵黄少铭
Owner WENZHOU UNIV
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