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Method for improving cooling effect of pure aluminum cooling fin

A technology of heat dissipation effect and heat sink, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for material and surface science, can solve the problems of increasing production cost, increasing the size of the heat sink, and being small in size, and achieves an increase in size. The effect of heat dissipation capacity, enhanced heat dissipation capacity, and simplified production process

Inactive Publication Date: 2014-08-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing methods of improving the heat dissipation effect of pure aluminum heat sinks are realized by increasing the specific surface of the heat sink, and in order to increase its specific surface area, the heat sink is generally processed into a complex shape; on the one hand, the complexity of the processing technology is increased At the same time, the requirements for aluminum materials are high, which increases the production cost; on the other hand, increasing the specific surface of the heat sink in this way will also increase the volume of the heat sink, resulting in an increase in the volume of the heat sink, which cannot meet the requirements of the heat sink. More and more power, but the development trend of smaller and smaller volume

Method used

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  • Method for improving cooling effect of pure aluminum cooling fin
  • Method for improving cooling effect of pure aluminum cooling fin
  • Method for improving cooling effect of pure aluminum cooling fin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for improving the heat dissipation effect of a pure aluminum heat sink, the specific steps are as follows:

[0035] Step A: use deionized water (resistivity 10MΩ·cm) and oxalic acid to prepare a 0.3mol / L oxalic acid solution as an electrolyte, and place the electrolyte in an ice-water bath to control the temperature of the electrolyte at 5°C;

[0036] Step B: Clean the pure aluminum heat sink with ethanol (analytical grade), and dry it naturally;

[0037] Step C: use the pure aluminum heat sink treated in step B) as the anode, the graphite electrode as the cathode, and the oxalic acid solution in step A) as the electrolyte, and anodize under DC voltage for 40 minutes until the surface of the heat sink forms a pore size of 20-100nm , A porous alumina layer with a thickness of 7-12 μm.

Embodiment 2

[0039] A method for improving the heat dissipation effect of a pure aluminum heat sink, the specific steps are as follows:

[0040] Step A: use deionized water (resistivity 15MΩ·cm) and oxalic acid to prepare a 0.4mol / L oxalic acid solution as an electrolyte, and place the electrolyte in an ice-water bath to control the temperature of the electrolyte at 8°C;

[0041] Step B: Clean the pure aluminum heat sink with ethanol (analytical grade), and dry it naturally;

[0042] Step C: use the pure aluminum heat sink treated in step B) as the anode, the graphite electrode as the cathode, and the oxalic acid solution in step A) as the electrolyte, and anodize under DC voltage for 40 minutes until the surface of the heat sink forms a pore size of 20-100nm , A porous alumina layer with a thickness of 7-12 μm.

Embodiment 3

[0044] A method for improving the heat dissipation effect of a pure aluminum heat sink, the specific steps are as follows:

[0045] Step A: use deionized water (resistivity 20MΩ·cm) and phosphoric acid to prepare an oxalic acid solution with a concentration of 0.5mol / L as the electrolyte, and place the electrolyte in an ice-water bath to control the temperature of the electrolyte at 10°C;

[0046] Step B: Clean the pure aluminum heat sink with ethanol (analytical grade), and dry it naturally;

[0047] Step C: use the pure aluminum heat sink treated in step B) as the anode, the graphite electrode as the cathode, and the oxalic acid solution in step A) as the electrolyte, anodize under DC voltage for 50 minutes until the surface of the heat sink forms a pore size of 20-100nm , A porous alumina layer with a thickness of 7-12 μm.

[0048] figure 1 It is a surface electron microscope image of the heat sink processed by the method of the above-mentioned embodiment 2. It can be seen ...

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Abstract

The invention discloses a method for improving the cooling effect of a pure aluminum cooling fin. A porous aluminum oxide layer which is of a nano structure is formed on the surface of the pure aluminum cooling fin in an electrolyte through anode oxidization. By forming a layer of aluminum oxide nano holes in the surface of the pure aluminum cooling fin, the cooling capability of the cooling fin is improved without increasing the number of cooling fins.

Description

technical field [0001] The invention relates to the technical field of heat sink surface treatment, in particular to a method for improving the heat dissipation effect of a pure aluminum heat sink. Background technique [0002] With the development of science and technology, the problem of heat dissipation becomes more and more prominent. According to statistics, thermal energy is one of the main manifestations of energy in high energy consumption industries such as electric power, metallurgy, chemical industry, and building materials. It is estimated that 80% of the heat needs to be converted by heat exchangers to meet different requirements. Especially in terms of microelectronics technology, the quality of heat dissipation will seriously affect system stability and hardware life. Traditional heat dissipation technologies based on air cooling, water cooling and heat pipes have been weak, and relatively new heat dissipation technologies, such as micro-channel, thermoelectr...

Claims

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Application Information

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IPC IPC(8): C25D11/10B82Y40/00B82Y30/00
Inventor 楚盛张峻鸣
Owner SUN YAT SEN UNIV
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