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Preparation method of micro-arc oxidation coating on aluminum alloy radiator for high thermal conductivity and high power LED lamp

A technology of micro-arc oxidation and LED lamp, which is applied in the direction of coating, anodic oxidation, surface reaction electrolytic coating, etc., can solve the problems of low thermal conductivity of aluminum alloy, LED light decay, poor thermal conductivity, etc., and achieve good heat dissipation performance, The effect of improving the thermal conductivity and improving the heat dissipation performance

Active Publication Date: 2021-10-01
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LED lamp radiators are usually made of aluminum alloy, but due to the low thermal conductivity of aluminum alloy, the thermal conductivity is poor
When the heat dissipation of the LED lamp is not good, it will cause strong light decay and even damage

Method used

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  • Preparation method of micro-arc oxidation coating on aluminum alloy radiator for high thermal conductivity and high power LED lamp
  • Preparation method of micro-arc oxidation coating on aluminum alloy radiator for high thermal conductivity and high power LED lamp
  • Preparation method of micro-arc oxidation coating on aluminum alloy radiator for high thermal conductivity and high power LED lamp

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Effect test

Embodiment 1

[0031] A method for preparing a micro-arc oxidation coating on an aluminum alloy radiator for high thermal conductivity and high-power LED lamps, comprising the following steps:

[0032] Step 1, preparing the basic solution of micro-arc oxidation: uniformly mix zirconium hydroxide, sodium phosphate, nitrilotriacetic acid and deionized water to obtain the product. Wherein, the concentration of zirconium hydroxide is 40g / L, the concentration of sodium phosphate is 30g / L, and the concentration of nitrilotriacetic acid is 35g / L. The service life of the micro-arc oxidation basic solution obtained in the present invention is as high as more than 12 months, the solution does not contain high-valent chromium and other metal ions that seriously pollute the environment, and the solution has the advantages of long-term effect and environmental protection.

[0033] Preparation of reduced graphene oxide dispersion solution: Add 4g of reduced graphene oxide (1.5 nm in diameter) into 1L of d...

Embodiment 2

[0037] A method for preparing a micro-arc oxidation coating on an aluminum alloy radiator for high thermal conductivity and high-power LED lamps, comprising the following steps:

[0038] Step 1, preparing the basic solution of micro-arc oxidation: uniformly mix zirconium hydroxide, sodium phosphate, nitrilotriacetic acid and deionized water to obtain the product. Wherein, the concentration of zirconium hydroxide is 45g / L, the concentration of sodium phosphate is 30g / L, and the concentration of nitrilotriacetic acid is 40g / L.

[0039] Preparation of reduced graphene oxide dispersion solution: add 2 g of reduced graphene oxide to 1 L of deionized water, use a high-speed shear centrifugal disperser to disperse, and disperse for 30 minutes at a speed of 23000 r / min.

[0040] Step 2, mixing the micro-arc oxidation basic solution and the reduced graphene oxide dispersion solution with a volume ratio of 1:1, using a magnetic stirrer to stir at a speed of 100r / min for 60 minutes, and ...

Embodiment 3

[0043] A method for preparing a micro-arc oxidation coating on an aluminum alloy radiator for high thermal conductivity and high-power LED lamps, comprising the following steps:

[0044] Step 1, preparing the basic solution of micro-arc oxidation: uniformly mix zirconium hydroxide, sodium phosphate, nitrilotriacetic acid and deionized water to obtain the product. Wherein, the concentration of zirconium hydroxide is 30g / L, the concentration of sodium phosphate is 28g / L, and the concentration of nitrilotriacetic acid is 50g / L.

[0045] Preparation of reduced graphene oxide dispersion solution: add 10 g of reduced graphene oxide to 1 L of deionized water, use a high-speed shear centrifugal disperser to disperse, and disperse for 120 minutes at a speed of 12000 r / min.

[0046] Step 2, mixing the micro-arc oxidation basic solution and the reduced graphene oxide dispersion solution with a volume ratio of 1:1, using a magnetic stirrer to stir at a speed of 150r / min for 60 minutes, and ...

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Abstract

The invention discloses a method for preparing a micro-arc oxidation coating of an aluminum alloy radiator for a high-thermal-conductivity high-power LED lamp. The method forms in-situ micro-arc oxidation on the surface of an aluminum alloy with high hardness, corrosion resistance, and good heat dissipation performance. Ceramic membrane, ceramic membrane can not only increase the surface area of ​​the radiator, but also the porous structure can produce micro-zone chimney effect, which is beneficial to strengthen the convection of heat in the heat dissipation process; add negatively charged reduced graphite oxide to the electrolyte of micro-arc oxidation Graphene can participate in the micro-arc oxidation anode reaction. The reduced graphene oxide has excellent thermal conductivity. After adding it, it can significantly improve the heat dissipation performance of the radiator, improve the heat dissipation effect of the LED lamp, and prolong the service life of the LED lamp.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal materials, in particular to a method for preparing a micro-arc oxidation coating of an aluminum alloy radiator for high thermal conductivity and high-power LED lamps. Background technique [0002] LED lights conform to the concept of environmental protection and energy saving advocated by today's society, and are more and more widely used in home lighting and traffic lights. However, the existing traditional high-power LED lamps involve the problems of fast temperature rise and slow heat dissipation. Long-term use will cause the LED lamp to be in a high-temperature state for a long time, which will shorten the service life of internal electronic components. Therefore, in order to improve the heat dissipation performance of LED lamps, many high-power LED lamps are equipped with radiators to operate within the normal operating temperature range, so as to avoid the problems of LED ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/10C25D15/00
CPCC25D11/026C25D11/08C25D11/10C25D15/00
Inventor 陈宏郝建民王成成陈永楠
Owner CHANGAN UNIV