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Multi-phase Al2O3/YAG:Ce fluorescent ceramic with high thermal conductivity for laser illumination and preparation method of multi-phase Al2O3/YAG:Ce fluorescent ceramic

A fluorescent ceramic, al2o3 technology, applied in lighting and heating equipment, lighting devices, lighting device parts and other directions, to achieve the effect of low sintering temperature, promoting industrialization development, and short test period

Inactive Publication Date: 2019-04-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of sintering densification, only garnet series phosphors can obtain ceramic blocks, and the thermal conductivity of fluorescent ceramics is only (10W*m -1 *K -1 )

Method used

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  • Multi-phase Al2O3/YAG:Ce fluorescent ceramic with high thermal conductivity for laser illumination and preparation method of multi-phase Al2O3/YAG:Ce fluorescent ceramic
  • Multi-phase Al2O3/YAG:Ce fluorescent ceramic with high thermal conductivity for laser illumination and preparation method of multi-phase Al2O3/YAG:Ce fluorescent ceramic
  • Multi-phase Al2O3/YAG:Ce fluorescent ceramic with high thermal conductivity for laser illumination and preparation method of multi-phase Al2O3/YAG:Ce fluorescent ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Will homemade Y 2.94 Al 5 o 12 : Ce 0.06 Yellow phosphor (10g) and commercial Al 2 o 3 (90g, particle diameter is 200nm) is put into high-purity alumina ball mill jar, add the high-purity alumina ball (200g) that diameter is 5mm and dehydrated alcohol (125g) respectively, place on planetary ball mill after ball milling 12h, put slurry The material was fully dried in an oven at 80°C for 12 hours, then ground, passed through a 100-mesh nylon sieve, and placed in a reagent bottle for later use.

[0050] Use the discharge plasma rapid sintering technology to sinter the uniformly mixed raw material powder, weigh 2g of the raw material powder each time, and put it into a graphite mold with an inner diameter of 20mm. In order to protect the graphite mold, put a layer of graphite paper inside the graphite mold To isolate raw material powder and graphite mold. In order to prevent the spread of heat on the surface of the mold, a layer of heat-insulating carbon felt is coate...

Embodiment 2

[0055] Will homemade Y 2.94 Al 5 o 12 : Ce 0.06 Yellow phosphor (20g) and commercial Al 2 o 3 (80g) into a high-purity alumina ball mill jar, add high-purity alumina balls (200g) with a diameter of 5mm and absolute ethanol (125g) respectively, place the ball mill on a planetary ball mill for 12h, and place the slurry at 80°C Fully dry in an oven for 12 hours, then grind, pass through a 100-mesh nylon sieve, and place it in a reagent bottle for later use.

[0056] Use the discharge plasma rapid sintering technology to sinter the uniformly mixed raw material powder, weigh 2g of the raw material powder each time, and put it into a graphite mold with an inner diameter of 20mm. In order to protect the graphite mold, put a layer of graphite paper inside the graphite mold To isolate raw material powder and graphite mold. In order to prevent the spread of heat on the surface of the mold, a layer of heat-insulating carbon felt is coated on the outside of the graphite mold for hea...

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Abstract

The invention relates to multi-phase Al2O3 / YAG:Ce fluorescent ceramic with high thermal conductivity for laser illumination and a preparation method of the multi-phase Al2O3 / YAG:Ce fluorescent ceramic. The multi-phase fluorescent ceramic comprises an Al2O3 ceramic substrate and 10wt%-22wt% of Y2.94Al5O12:Ce0.06 phosphor dispersed in the Al2O3 ceramic substrate.

Description

technical field [0001] The invention relates to a high thermal conductivity Al 2 o 3 / YAG:Ce composite fluorescent ceramics and its preparation method, and its application in laser lighting. Background technique [0002] As a kind of solid-state lighting, laser white light lighting technology is considered to be a new generation of lighting energy due to its advantages of high brightness, long irradiation distance, and small size, and has attracted great attention from researchers. Nobel Prize winner in physics - Professor Shuji Nakamura predicted that laser lighting will replace LED lighting in the next ten years. There are mainly two ways to realize laser white light illumination: 1. Use ultraviolet or blue laser to excite fluorescent materials, convert part of the laser light into other visible light, and use the principle of light color complementarity to realize white light illumination; 2. Use red, yellow and blue three-color lasers to directly Composite to achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/622F21V9/32
CPCC04B35/117C04B35/622C04B2235/3222C04B2235/3225C04B2235/3229C04B2235/5436C04B2235/5454C04B2235/6562C04B2235/6567C04B2235/6583C04B2235/661C04B2235/666F21V9/32
Inventor 黄政仁刘泽华刘学建姚秀敏王晓洁黄毅华吴西士蔡平
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI