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Graphite coated aluminum radiator and manufacturing process thereof

A manufacturing process and radiator technology, applied in the cooling/heating device of lighting device, lighting and heating equipment, lighting device and other directions, can solve the problems of LED lighting lamps lifespan can not be greatly improved, low thermal conductivity, severe light decay, etc. Achieve the effect of light weight, good heat transfer effect and low cost

Inactive Publication Date: 2013-05-01
SHANXI SHANDI XINYUAN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper is used as the heat sink of LED lighting fixtures. Although the heat conduction is high, the cost is high. Few heat sinks use copper materials, and most heat sinks use aluminum materials.
Due to the limitations of the production process of the existing aluminum radiators, the actual thermal conductivity of the finished radiators produced is lower than 200W / m*K, so that the life of LED lighting lamps cannot be greatly improved (the theoretical life of LED light-emitting chips is 100,000 hours) , and the light fades very badly

Method used

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  • Graphite coated aluminum radiator and manufacturing process thereof
  • Graphite coated aluminum radiator and manufacturing process thereof

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Embodiment Construction

[0021] Such as figure 1 , figure 2 As shown, a graphite-coated aluminum radiator, the graphite-coated aluminum radiator is composed of WT70% graphite powder, WT5% copper powder, WT5% aluminum powder, WT14% silane coupling agent, WT6% titanate coupling agent is sintered at a high temperature of 1000°C-1200°C to obtain a graphite composition, and the graphite composition is made into a graphite block with high thermal conductivity through a molding production equipment, and the graphite block is cut into graphite of a specified size as required The graphite sheet is used as a heat-conducting base material and coated in an aluminum heat dissipation substrate, that is, a graphite-coated aluminum heat sink is made.

[0022] A kind of manufacturing process of the aluminum heat sink coated with graphite of the present invention, this process mainly comprises the following steps:

[0023] 1), acid treatment: put the finely ground graphite powder (particle diameter≤0.9mm) with a car...

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Abstract

The invention discloses a graphite coated aluminum radiator and a manufacturing process thereof. The graphite coated aluminum radiator is manufactured by the following steps of: sintering 7 percent by weight of graphite powder, 5 percent by weight of copper powder, 5 percent by weight of aluminum powder, 14 percent by weight of silane coupling agent and 6 percent by weight of titanate coupling agent under a high-temperature condition to obtain a graphite composition; manufacturing the graphite composition into a high-thermal-conductivity graphite block through molding production equipment; cutting the graphite block into graphite flakes of a specification size as required; and coating the graphite flake serving as a heat-conducting substrate in an aluminum radiating substrate to manufacture the graphite coated aluminum radiator. Compared with aluminum and copper, the graphite has the advantages of quicker radiation, light weight and convenience in attachment and assembly with other radiators. Meanwhile, the graphite has an anisotropic heat transfer characteristic, can realize directional heat transfer, has a better heat transfer effect to other components and is low in cost.

Description

technical field [0001] The invention relates to the field of LED lamps, in particular to a graphite-coated aluminum radiator suitable for LED high-power lighting lamps and a manufacturing process thereof. Background technique [0002] At present, the heat dissipation materials of LED high-power lighting fixtures generally use aluminum heat sinks or copper heat sinks for heat dissipation of light fixtures. This aluminum radiator or copper radiator is actually a temperature chamber, which evenly dissipates the heat. The thermal conductivity of copper is about 1.8 times that of aluminum (AL thermal conductivity: 200W / m*K, Cu thermal conductivity: 380W / m*K), and the density is about 3 times (AL density: 2.7g / cm 3 , Cu density: 8.9g / cm 3 ), in other words, for a heat sink with the same volume and area, the weight of copper is three times that of aluminum. Copper is used as a heat sink for LED lighting fixtures. Although the heat conduction is high, the cost is high. Few heat s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V29/00F21Y101/02F21V29/508F21V29/71F21V29/89
Inventor 杨诗毅刘荣
Owner SHANXI SHANDI XINYUAN TECH
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