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Method for enhancing yellow emission intensity of YAG: Ce fluorescent powder

A technology of emission intensity and fluorescent powder, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problem of low yellow light emission intensity of YAG:Ce phosphor, and achieve remarkable technological progress, excellent spectral properties, and strong yellow light emission intensity effect

Inactive Publication Date: 2017-07-18
SHANGHAI INST OF TECH
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Problems solved by technology

[0004] For the above-mentioned technical problems in the prior art, the invention provides a kind of method that strengthens YAG:Ce phosphor yellow light emission intensity, described this method of enhancing YAG:Ce phosphor yellow light emission intensity will solve existing The technical problem of YAG:Ce phosphor yellow light emission intensity is not high

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  • Method for enhancing yellow emission intensity of YAG: Ce fluorescent powder

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Embodiment 1

[0012] Weigh 0.3g of Al powder and 3g of YAG:Ce powder according to the mass ratio of Al powder to YAG:Ce powder of 0.1:1, place them in a crucible boat respectively, and place them in a tube furnace in parallel to the left and right (Al powder and YAG :Ce placed separately, always separated, without contact, and the distance between the mutual centers of the crucible boats does not exceed 10 cm), the whole system is evacuated to less than 0.1MPa, heat treatment at 1000°C, after reduction for 8 hours, naturally cool To room temperature, take out the treated YAG:Ce sample. Use a fluorescence spectrometer (HITACHIF-7000) to test its luminous intensity, under the same test conditions, the YAG prepared by the present invention: Ce powder is 5%H 2 -95%N 2 , CO reducing agent to prepare YAG:Ce powder can emit 1.5 times and 1.1 times the intensity (such as figure 1 shown).

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Abstract

The invention provides a method for enhancing yellow emission intensity of YAG: Ce fluorescent powder. The method comprises the following steps: by taking Al powder as a reducing agent, respectively filling the Al powder and YAG: Ce powder into a crucible boat, wherein the Al powder and the YAG: Ce powder are separately arranged, and a mass ratio of the reducing agent Al powder to the YAG: Ce powder is (0.03-1):1; and adding the powder into a vacuum tube furnace, and performing heating treatment at the temperature of 1000 DEG C for 6-10 hours. Compared with luminous intensity of YAG: Ce powder reduced at the temperature of 1000 DEG C for 8 hours by a 5% H2-95% N2 and CO reduction method, due to the same 460-nm blue light excitation, the YAG: Ce powder prepared by the method disclosed by the invention has high yellow emission intensity.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a fluorescent powder, in particular to a method for enhancing the yellow light emission intensity of YAG:Ce fluorescent powder. Background technique [0002] White light LED is a new type of solid-state lighting source. Compared with traditional incandescent lamps and fluorescent lamps, it has significant advantages such as low power consumption, high efficiency, green environmental protection, energy saving, long life, small size, fast response, and good color rendering. The new generation of green and environment-friendly lighting sources has broad market prospects and huge social and economic benefits, and has received widespread attention from the industry. [0003] At present, there are three main ways to produce white light emission based on LEDs: (1) Multi-color combination method, that is, white light is generated by mixing red, green, and blue colors, such as combining red,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7774
Inventor 房永征随大友侯京山刘玉峰赵国营张娜潘彩霞蒋广翔郑新峰丁艳花
Owner SHANGHAI INST OF TECH
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