Composite ceramic fluophor for high-power laser illumination, preparation method of composite ceramic fluophor and light source device

A technology of composite ceramics and laser lighting, applied in the laser field, can solve immature problems, achieve stable color temperature, improve thermal conductivity and color rendering index, and excellent luminous efficiency

Pending Publication Date: 2019-06-18
SHANGHAI AVIATION ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Laser lighting has great application potential due to its advantages of high energy efficiency and small size. It has been successfully commercialized in laser lighting for car lights, but the key technology is not yet mature. In terms of efficiency, it is necessary to carry out systematic theoretical, numerical simulation and experimental research work to meet the needs of large-scale application and promotion of laser lighting.

Method used

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  • Composite ceramic fluophor for high-power laser illumination, preparation method of composite ceramic fluophor and light source device
  • Composite ceramic fluophor for high-power laser illumination, preparation method of composite ceramic fluophor and light source device
  • Composite ceramic fluophor for high-power laser illumination, preparation method of composite ceramic fluophor and light source device

Examples

Experimental program
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Effect test

Embodiment 1

[0033] to Y 2 o 3 、Gd 2 o 3 , CeO 2 and Al(NO 3 ) 3 •9H 2 O is used as a raw material to prepare a nitrate solution, respectively according to (Ce 0.008 Y 0.992 ) 3 Al 5 o 12 , (Ce 0.008 Gd 0.50 Y 0.492 ) 3 Al 5 o 12 The chemical ratio of the transparent ceramics is mixed with the corresponding nitrate solution, and the fluorescent powder with a particle size in the range of 50-200nm is synthesized by hydrothermal method and kept at 150°C for 10 hours. Ce:YAG powder, Ce,Gd:YAG powder were mixed with commercial nano-Al 2 o 3 The powder (particle size 50nm) is mixed according to the mass ratio of 50%:50%, 50%:50%, and then a certain amount of sintering aids, linking agents, plasticizers, and dispersants are added as additives. Ball milling in a ball mill prepares a uniformly mixed slurry. After the slurry is vacuum defoamed, it is sequentially poured into a tape casting machine for tape casting to obtain a double-layer composite cast sheet; the double-layer c...

Embodiment 2

[0036] Adjust Ce:YAG powder, Ce,Gd:YAG powder and commercial nano-Al 2 o 3 The powder (particle size is about 50nm) is mixed according to the mass ratio of 60%:40%, 40%:60%, and other conditions are the same as in Example 1. It can also be excited and recombined under the blue laser LD. The light emitting device can obtain the highest Irradiation power density up to 15W / mm 2 , high-quality white light with a color temperature of 4772K and a photoelectric efficiency of 147lm / W.

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Abstract

The invention discloses a composite ceramic fluophor for high-power laser illumination. The composite ceramic fluophor comprises a ceramic fluophor first layer and a ceramic fluophor second layer, wherein the ceramic fluophor first layer is a complex phase fluophor formed by (CexY<1-x>)3Al5O12 particles and Al2O3 particles through uniform and staggered construction, wherein the mass ratio of the (CexY<1-x>)3Al5O12 particles is 30 to 100 percent, and the mass ratio of the Al2O3 particles is 0 to 70 percent; the ceramic fluophor second layer is a complex phase fluophor formed by (CeyGdzY<1-y-z>)3Al5O12 particles and Al2O3 particles through uniform and staggered construction, wherein the mass ratio of the (CeyGdzY<1-y-z>)3Al5O12 particles is 30 to 100 percent, and the mass ratio of the Al2O3particles is 0 to 70 percent. The composite ceramic fluophor for high-power laser illumination has the advantages that the heat conductivity and the color rendering index are obviously improved; the color temperature is stable; the luminous efficiency is excellent.

Description

technical field [0001] The invention relates to the laser field, in particular to a composite ceramic phosphor for high-power laser illumination, a preparation method and a light source device. Background technique [0002] At present, the mainstream scheme of commercialized white light lighting is white LED lighting that uses blue light chips to excite phosphors of different colors to achieve white light output. However, as the driving power density increases, blue LEDs have a phenomenon of "sudden drop in efficiency" that has nothing to do with heat dissipation, that is, at high power densities, the light output efficiency rapidly decays. In recent years, scientists from various countries have proposed some improvement measures around the problem of "sudden drop in efficiency" of LEDs. Although the efficiency has been improved to a certain extent, the contradiction between power and efficiency has not been fundamentally overcome so far. In order to ensure a high conversio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/10C09K11/80
Inventor 王红叶勇朱宁李春晖曾庆兵
Owner SHANGHAI AVIATION ELECTRIC
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