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Sheet alumina porous ceramic for LED lamp heat dissipation and preparation method thereof
The invention relates to a sheet alumina porous ceramic for LED lamp heat dissipation. The sheet alumina porous ceramic is prepared from the following raw materials in parts by weight: 34-36 parts of alpha-Al2O3 (with the grain size of 2-8 [mu]m), 100-105 parts of deionized water, 0.2-0.3 part of sodium polyacrylate, 2-2.3 parts of methylcellulose, 1.6-1.8 parts of glycerol, 3-4 parts of oxidized graphene, 2-3 part of titanium dioxide nanotubes, 0.4-0.6 part of yttrium oxide, 4-5 parts of nano-aluminum hydroxide, 1.2-1.5 parts of nano-copper and 0.9-1.1 parts of PVA binding agent. Porous channels among sheet alumina porous ceramic layers are communicated, the transition is good, and the thermal fatigue performance is good; the phenomenon that alumina particles are easily aggregated is improved by using the nano-aluminum hydroxide; and the tenacity, thermal conductivity and heat resistance of the ceramic are improved by using the oxidized graphene, titanium dioxide nanotubes and yttrium oxide. The porous ceramic is compounded with metals, and is suitable for high-power LED chip heat dissipation.
Sheet alumina porous ceramic for LED lamp heat dissipation and preparation method thereof
The invention relates to a sheet alumina porous ceramic for LED lamp heat dissipation. The sheet alumina porous ceramic is prepared from the following raw materials in parts by weight: 34-36 parts of alpha-Al2O3 (with the grain size of 2-8 [mu]m), 100-105 parts of deionized water, 0.2-0.3 part of sodium polyacrylate, 2-2.3 parts of methylcellulose, 1.6-1.8 parts of glycerol, 3-4 parts of oxidized graphene, 2-3 part of titanium dioxide nanotubes, 0.4-0.6 part of yttrium oxide, 4-5 parts of nano-aluminum hydroxide, 1.2-1.5 parts of nano-copper and 0.9-1.1 parts of PVA binding agent. Porous channels among sheet alumina porous ceramic layers are communicated, the transition is good, and the thermal fatigue performance is good; the phenomenon that alumina particles are easily aggregated is improved by using the nano-aluminum hydroxide; and the tenacity, thermal conductivity and heat resistance of the ceramic are improved by using the oxidized graphene, titanium dioxide nanotubes and yttrium oxide. The porous ceramic is compounded with metals, and is suitable for high-power LED chip heat dissipation.
Sheet alumina porous ceramic for LED lamp heat dissipation and preparation method thereof
DONG ZHAOHAI (author)
2015-11-18
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015
| European Patent Office | 2015
| European Patent Office | 2015
| European Patent Office | 2015
| European Patent Office | 2015