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Blue fluorescent material and preparation method thereof

A technology of blue fluorescence and fluorescence emission, applied in the field of fluorescent materials, can solve the problems of insufficient spectrum, poor controllability of preparation methods, and low fluorescence quantum efficiency of gibbsite nano-luminescent materials, and achieves high efficiency, simple operation, Low energy consumption effect

Active Publication Date: 2017-04-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gibbsite ore nanoluminescent material prepared by the above method has disadvantages such as low fluorescence quantum efficiency, insufficient spectrum width, and poor controllability of the preparation method, which cannot meet the application requirements of UV LEDs.
In addition, there are still uncertainties in the luminescent mechanism of gibbsite ore luminescent materials.

Method used

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  • Blue fluorescent material and preparation method thereof
  • Blue fluorescent material and preparation method thereof
  • Blue fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Take an appropriate amount of organoaluminum salt precursor basic aluminum acetate (Al(OH)(Ac) 2 ), fully ground. Weigh 0.5000g-2.0000g of the ground basic aluminum acetate powder.

[0077] Put the weighed basic aluminum acetate powder into the quartz boat, put the quartz boat into the quartz tube, and then put the quartz tube into the heating area of ​​the tube furnace. Connect the exhaust system, check the airtightness of the system after sealing, and set the heating conditions after confirming that the airtightness is good.

[0078] Nitrogen gas was introduced into the quartz tube for 30 minutes to exhaust. After the exhaust was completed, nitrogen gas was continuously injected at a rate of 50 sccm, and the heating program of the tube furnace system was started. The starting temperature is room temperature, and the heating rate is 26°C / min. After the temperature was raised to 290°C, the system was kept at 290°C for 2 hours.

[0079] After the tube furnace system ...

Embodiment 2

[0085] Take an appropriate amount of organoaluminum salt precursor basic aluminum acetate (Al(OH)(Ac) 2 ), fully ground. Weigh 1.25 g of ground basic aluminum acetate powder.

[0086] Put the weighed basic aluminum acetate powder into the quartz boat, put the quartz boat into the quartz tube, and then put the quartz tube into the heating area of ​​the tube furnace. Connect the exhaust system, check the airtightness of the system after sealing, and set the heating conditions after confirming that the airtightness is good.

[0087] Nitrogen gas was introduced into the quartz tube for 30 minutes to exhaust. After the exhaust was completed, nitrogen gas was continuously injected at a rate of 50 sccm, and the heating program of the tube furnace system was started. The initial temperature is room temperature, and the heating rate is 30°C / min. After heating up to 300°C, the system was kept at 300°C for 2.5h.

[0088] After the tube furnace system is kept warm and automatically st...

Embodiment 3

[0093] Take an appropriate amount of organoaluminum salt precursor basic aluminum acetate (Al(OH)(Ac) 2 ), fully ground. Weigh 1.25 g of the ground basic aluminum acetate powder.

[0094] Put the weighed basic aluminum acetate powder into the quartz boat, put the quartz boat into the quartz tube, and then put the quartz tube into the heating area of ​​the tube furnace. Connect the exhaust system, check the airtightness of the system after sealing, and set the heating conditions after confirming that the airtightness is good.

[0095] Nitrogen gas was introduced into the quartz tube for 30 minutes to exhaust. After the exhaust was completed, nitrogen gas was continuously injected at a rate of 100 sccm, and the heating program of the tube furnace system was started. The starting temperature is room temperature, and the heating rate is 32°C / min. After the temperature was raised to 320°C, the system was kept at 320°C for 2.5 hours.

[0096] After the heat preservation of the t...

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Abstract

The invention provides a blue fluorescent material which comprises aluminum hydroxide with a chemical formula of Al2O3.nH2O, wherein n is 0.2, 1 or 3; and the material does not contain a rare-earth element. The invention further provides a preparation method for the blue fluorescent material. The blue fluorescent material provided by the invention has the characteristics of small toxicity, a high fluorescent quantum yield, a great light-emitting wavelength range and the like, and is wide in scope of application; and the preparation method for the blue fluorescent material is simple in process and is high in yield.

Description

technical field [0001] The invention relates to the technical field of fluorescent materials, in particular to a blue fluorescent material and a preparation method thereof. Background technique [0002] White light-emitting diode (LED) has the advantages of high efficiency, energy saving, environmental protection and long life, and is a new generation of solid-state lighting source. The blue-light-excited white-light LED device is a device prepared by using the blue-light chip to excite phosphor technology. It has the characteristics of low cost and easy processing, and is the mainstream technology for lighting applications. Due to the high intensity of blue light in the emission spectrum of this type of white light LED, it has a strong damage effect on the retina and cannot meet the application requirements of indoor "healthy" lighting. Compared with the current blue light-excited white light LED, the ultraviolet chip-excited white light LED (UV white light LED) device des...

Claims

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Application Information

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IPC IPC(8): C09K11/64C01F7/30
CPCC01F7/30C09K11/641
Inventor 陈冰昆许行健邹双阳钟海政邹炳锁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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