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Narrow-band deep ultraviolet luminescent material and preparation method thereof

A luminescent material, deep ultraviolet technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of polluted environment, high production cost, lamp mercury poisoning, etc., and achieve good luminescent performance, high product quality, simple and reliable process. Effect

Active Publication Date: 2013-09-11
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a light-emitting lamp for the disadvantages of the prior art that the gas discharge lamp of mercury vapor will cause mercury poisoning and pollute the environment, but the LED that can emit 365nm ultraviolet light has low output power and high production cost. Narrow-band deep-ultraviolet luminescent material with good performance, mercury-free, and narrow spectral linewidth

Method used

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  • Narrow-band deep ultraviolet luminescent material and preparation method thereof

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Effect test

Embodiment 1

[0026] Embodiment 1: Sol-gel method prepares Y 2.99 al 5 o 12 :0.01Gd

[0027] At room temperature, 1.495mmolY 2 o 3 , 2.5mmol Al 2 o 3 and 0.005 mmol Gd 2 o 3 Dissolve in a container with 2ml of nitric acid and 2ml of deionized water. After cooling, add 30ml of a mixed solution of ethanol and water with a volume ratio of 3:1, add 1.68g of citric acid under stirring conditions, the molar ratio of citric acid and metal ions in the raw material is 2:1, and heat and stir in a water bath at 80°C After 2 hours, a uniform and transparent precursor sol can be obtained, and then the precursor sol is dried at 150° C. for 6 hours to obtain a xerogel. Grind the xerogel into powder, put the ground powder into a high-temperature box furnace to raise the temperature to 1200°C, and sinter at this temperature for 6h. Obtained UV-emitting phosphor Y 2.99 al 5 o 12 : 0.01Gd. The particle size distribution is uniform, and it emits ultraviolet light under the excitation of low-volta...

Embodiment 2

[0028] Embodiment 2: sol-gel method is prepared (Y 0.86 La 0.1 ) 3 al 5 o 12 :0.12Gd

[0029] At room temperature, 1.29mmol Y 2 o 3 , 0.15mmol La 2 o 3 , 2.5mmol Al 2 o 3 and 0.06 mmol Gd 2 o 3Dissolve in a container with 2ml of nitric acid and 2ml of deionized water. After cooling, add 30ml of a mixed solution of ethanol and water with a volume ratio of 2:1, add 1.68g of citric acid under stirring conditions, the molar ratio of citric acid and metal ions in the raw material is 2:1, and heat and stir in a water bath at 70°C After 6 hours, a uniform and transparent precursor sol can be obtained, and then the precursor sol is dried at 180° C. for 4 hours to obtain a xerogel. Grind the xerogel into powder, then put the ground powder into a high-temperature box furnace to raise the temperature to 1600°C, and sinter at this temperature for 4 hours to obtain an ultraviolet-emitting phosphor (Y 0.86 La 0.1 ) 3 al 5 o 12 : 0.12Gd. The particle size distribution is u...

Embodiment 3

[0030] Embodiment 3: sol-gel method is prepared (Y 0.86 Lu 0.04 ) 3 (Al 0.2 Ga 0.8 ) 5 o 12 :0.3Gd

[0031] At room temperature, 1.29mmol Y 2 o 3 , 0.06mmol Lu 2 o 3 , 0.5mmol Al 2 o 3 , 2.0mmolGa 2 o 3 and 0.15 mmol Gd 2 o 3 Dissolve in a container with 2ml of nitric acid and 2ml of deionized water. After cooling, add 30ml of a mixed solution of ethanol and water with a volume ratio of 6:1, add 2.52g of citric acid under stirring conditions, the molar ratio of citric acid and metal ions in the raw material is 3:1, and heat and stir in a water bath at 85°C After 5 hours, a uniform and transparent precursor sol can be obtained, and then the precursor sol is dried at 140° C. for 8 hours to obtain a xerogel. Grind the xerogel into powder, then put the ground powder into a high-temperature box furnace to raise the temperature to 1500°C, and sinter at this temperature for 8 hours to obtain an ultraviolet-emitting phosphor (Y 0.86 Lu 0.04 ) 3 (Al 0.2 Ga 0.8 ) ...

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Abstract

The invention discloses a narrow-band deep ultraviolet luminescent material and a preparation method thereof. The luminescent material is a substance with the following chemical formula: A3-x(Al1-mGam)5O12:xGd, wherein 0<x<=0.45, 0<=m<=1; and A is at least one of Y, La, Lu, Sm, Tb and Sc. In the preparation method, at least one of the oxides, carbonates, chlorides, nitrates, oxalates and acetates of Y<3+>, La<3+>, Lu<3+>, Sc<3+>, Sm<3+> and Tb<3+> and the oxides, carbonates, chlorides, nitrates, oxalates or acetates of Al<3+>, Gd<3+> and Ga<3+> are used as the raw materials to prepare the narrow-band deep ultraviolet luminescent material through the sol-gel method or the high-temperature solid-state method. The invention provides the narrow-band deep ultraviolet luminescent material with good luminescent properties, no mercury and narrow spectral line width.

Description

technical field [0001] The invention relates to a luminescent material and a preparation method thereof, in particular to a narrow-band deep ultraviolet luminescent material and a preparation method thereof. Background technique [0002] Gas discharge lamps using mercury vapor discharge to generate ultraviolet rays with a wavelength of 254nm are widely used in various industrial processes, such as photopolymerization and photolithography for large-area display panels and printed circuit boards, etc. . In addition, ultraviolet light can also be used for sterilization and medical treatment of skin diseases. However, since mercury is a poisonous element, the release of mercury vapor during the use of this gas discharge lamp will cause harm to human body and environment. [0003] Nitrogen-based semiconductor light-emitting diodes (LEDs) can emit light in the ultraviolet region, and LEDs that emit 365nm ultraviolet light have entered the market, with an output power of 250 mill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
Inventor 周明杰马文波时朝璞
Owner OCEANS KING LIGHTING SCI&TECH CO LTD