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Preparing method for aluminum alloy radiator micro-arc oxidation coating for high-heat-conduction and large-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: 2019-11-29
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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  • Preparing method for aluminum alloy radiator micro-arc oxidation coating for high-heat-conduction and large-power LED lamp
  • Preparing method for aluminum alloy radiator micro-arc oxidation coating for high-heat-conduction and large-power LED lamp
  • Preparing method for aluminum alloy radiator micro-arc oxidation coating for high-heat-conduction and large-power LED lamp

Examples

Experimental program
Comparison scheme
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 preparing method for an aluminum alloy radiator micro-arc oxidation coating for a high-heat-conduction and large-power LED lamp. According to the method, micro-arc oxidationis used for in-situ generation of a ceramic film with high hardness, corrosion resistance and good heat dissipation performance on the surface of an aluminum alloy; through the ceramic film, the surface area of a radiator can be increased, the microzone chimney effect can be generated through a porous structure, and convection of heat in the heat dissipation process can be better enhanced; reducing type oxidized graphene with electronegativity is added in a micro-arc oxidation electrolyte and can participate in the micro-arc oxidation anode reaction, the reducing type oxidized graphene has excellent heat conduction performance, and after adding, the heat dissipation performance of the radiator can be obviously improved, the heat dissipation effect of the LED lamp is improved, and the service life of the LED lamp is prolonged.

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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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
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