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Sheet alumina porous ceramic for anti-ultraviolet LED lamp heat dissipation and preparation method thereof

A flake alumina, LED lamp technology, applied in the field of porous heat-dissipating ceramics, can solve the problems such as inability to uniformly disperse alumina, uneven ceramic structure, poor compatibility, etc., achieve good UV protection performance, benefit human health, transition good effect

Inactive Publication Date: 2015-11-18
合肥凯士新材料贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot disperse the alumina uniformly, it is easy to agglomerate, and the ceramic structure is not uniform, and if the ceramic sheet is applied to the LED heat sink, it is necessary to improve the toughness, thermal conductivity, crack resistance, and heat resistance of the ceramic.
The compatibility between the ceramic sheet and metal is relatively poor and needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] A flaky alumina porous ceramic for heat dissipation of UV-resistant LED lamps, made of the following raw materials in parts by weight (kg): α-Al 2 o 3 (Particle size is 2-8μm) 35, deionized water 103, sodium polyacrylate 0.2, methyl cellulose 2.1, glycerol 1.7, K 2 O0.2, zirconium aluminosilicate 1, P 2 o 5 0.5, nano zinc oxide 1.4, nano aluminum hydroxide 4.5, nano copper 1.4, PVA binder 1.

[0016] The production method of the flaky aluminum oxide porous ceramics for heat dissipation of the ultraviolet-proof LED lamp is characterized in that:

[0017] (1) Add α-Al 2 o 3 , deionized water, and sodium polyacrylate were mixed to obtain a suspension, which was ball-milled for 5 hours, and zirconium aluminosilicate, P 2 o 5 , mix evenly, then add PVA binder, mix evenly, then add nano-aluminum hydroxide, nano-zinc oxide, ball mill for 0.7h, let stand for 50min, to obtain slurry;

[0018] (2) Add methyl cellulose and glycerol to the slurry obtained in step (1), conti...

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Abstract

The invention relates to a sheet alumina porous ceramic for anti-ultraviolet 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, 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, 0.2-0.3 part of K2O, 0.9-1.1 part of zirconia aluminosilicate, 0.4-0.6 part of P2O5, 1.3-1.5 part of nano-zinc oxide, 4-5 parts of nano-aluminium hydroxide, 1.2-1.5 parts of nano-copper and 0.9-1.1 parts of PVA adhesive. Porous channels among sheet alumina porous ceramic layers are communicated, the transition is good, and the thermal fatigue performance is good; and the abrasive resistance of the ceramic is improved by using the zirconia aluminosilicate, P2O5 and nano-zinc oxide, so that the ceramic has good anti-ultraviolet performance, the ceramic is beneficial for the health of people, and the service life of the chip is prolonged.

Description

technical field [0001] The invention relates to the field of porous heat dissipation ceramics, in particular to a sheet-shaped alumina porous ceramic used for heat dissipation of an ultraviolet-proof LED lamp and a preparation method thereof. Background technique [0002] Light-emitting diode (LED) is a type of light-emitting device that can directly convert electrical energy into visible light and radiant energy. It has strong market potential, and high-power LEDs are considered by the industry to be the main direction of the lighting source market1. At the current level, high-power LEDs can only convert 10% to 20% of the input power into light energy, and the remaining 80% to 90% are converted into heat energy. In order to ensure its normal operation, it is necessary to ensure that the operating temperature of the LED is within the allowable range through an effective heat dissipation design. Therefore, the heat dissipation problem of high-power LED chips has become an ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B38/00
Inventor 董照海
Owner 合肥凯士新材料贸易有限公司
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