Method for producing composite copper powder for ultrathin heat pipe

A production method and technology of heat pipes, applied in the field of heat pipes, can solve the problems of difficulty in meeting the heat transfer requirements of ultra-thin heat pipes, slow water absorption rate, low porosity of liquid-absorbing cores, etc., and achieve irregular shape and bulk density. The effect of low and connected porosity improvement

Active Publication Date: 2015-02-25
湖南省天心博力科技有限公司
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  • Abstract
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Problems solved by technology

[0004] At present, the raw material of the liquid-absorbing core of the conventional sintered heat pipe is mainly water atomized pure copper powder, but the thickness of the ultra-thin heat pipe is less than 1.0mm, and the particle size of the pure copper powder is less than 150um. The manufactured liquid-absorbent core has low porosity and slow water absorption rate, which is difficult to meet the heat transfer requirements of ultra-thin heat pipes

Method used

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  • Method for producing composite copper powder for ultrathin heat pipe

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specific Embodiment 1

[0029] A production method of composite copper powder for ultra-thin heat pipes, said method comprising the steps of:

[0030] (1) Mixing powder: Mix the pure copper powder and electrolytic copper powder evenly with water atomized individual particles, wherein the electrolytic copper powder accounts for 60% of the weight of the mixing powder.

[0031] (2) Heat treatment: heat-treat the compounded powder obtained in the step (1) under a reducing atmosphere of hydrogen or nitrogen-hydrogen mixed gas, and the heat treatment temperature is 650°C.

[0032] (3) Crushing: using a hammer or jaw crusher to crush the powder obtained in the step (2) to obtain composite copper powder.

[0033] (4) Anti-oxidation treatment: Anti-oxidation treatment is carried out on the surface of the composite copper powder treated in the step (3) by using copper powder antioxidant.

[0034] (5) Sieving: sieve the composite copper powder after the treatment in the step (4), take the composite copper powd...

specific Embodiment 2

[0037] A production method of composite copper powder for ultra-thin heat pipes, said method comprising the steps of:

[0038] (1) Mixing powder: Mix the pure copper powder and the electrolytic copper powder evenly with water atomization, wherein the electrolytic copper powder accounts for 10% of the weight of the mixing powder.

[0039] (2) Heat treatment: heat-treat the compounded powder obtained in the step (1) under a reducing atmosphere of hydrogen or nitrogen-hydrogen mixed gas, and the heat treatment temperature is 500°C.

[0040] (3) Crushing: using a hammer or jaw crusher to crush the powder obtained in the step (2) to obtain composite copper powder.

[0041] (4) Anti-oxidation treatment: Anti-oxidation treatment is carried out on the surface of the composite copper powder treated in the step (3) by using copper powder antioxidant.

[0042] (5) Sieving: sieve the composite copper powder after the treatment in the step (4), take the composite copper powder with a part...

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Abstract

The invention provides a method for producing composite cooper powder for an ultrahigh heat pipe. The method for producing the composite copper powder for the ultrahigh heat pipe comprises the steps of powder blending, heat treatment, smashing, oxidant treatment and screening. The composite copper powder produced according to the method is formed in the mode that after electrolytic copper powder and water atomized copper powder are mixed, heat treatment, smashing, oxidant treatment and screening are conducted on the mixture. After compaction and sintering are conducted on the composite copper powder, a capillary structural layer with high communication porosity and high capillary water absorption rate can be obtained, and the heat conduction efficiency of the ultrathin heat pipe is improved.

Description

technical field [0001] The invention relates to the technical field of heat pipes, and more specifically, relates to a production method of composite copper powder for ultra-thin heat pipes. Background technique [0002] Heat pipe technology is a method of using phase change in heat pipes to absorb heat and conduct heat quickly, and its heat conduction capacity exceeds that of any known metal. The heat pipe is composed of a closed wall shell, a liquid-absorbing core, and a fluid. One end of the heat pipe is heated, and the fluid vaporizes, bringing the heat to the condensation end. The vaporized fluid condenses into a liquid at the condensation end and flows back to the At the heating end, the heat transfer is carried out continuously in such a cycle. [0003] The liquid-absorbing core is the driving force and channel for liquid circulation and heat transfer, and the porosity and water flow rate of the liquid-absorbing core have an important impact on the performance of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
Inventor 莫文剑易翠钟耀宗杨宏生张拥军
Owner 湖南省天心博力科技有限公司
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