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Super-fine electric heating material composite processing technique

A technology of electric heating materials and composite processing, applied in the direction of heating element materials, etc., can solve the problems of difficult acquisition and expensive diamonds, and achieve the effect of improving thermal conductivity and simple process

Inactive Publication Date: 2014-05-21
于洪洲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a heat dissipation material with a thermal conductivity higher than copper's thermal conductivity of 380W / mK and aluminum's thermal conductivity of 240W / mK, diamond is a crystal form composed of carbon. The highest thermal conductivity of diamond is 2000W / mK, but diamonds are expensive and expensive. Difficulty in obtaining is the most important problem that cannot replace copper and aluminum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 40% expanded (acidified) graphite with 92% carbon content, 30% carbon content with 95% nano-scale (scale) graphite powder and 30% nano-scale mesophase carbon powder, and gradually put them into the high-temperature reaction furnace in proportion to the inert gas. Under protection, gradually increase the temperature at 350°C-500°C and mix for 3 hours to obtain a thick carbon mixed liquid, then carry out hot compression molding, the molding temperature is 450°C, and the pressure is 150MPa. 2 hours, graphitization at 3000°C for 1 hour, the thermal conductivity of the obtained material is 517W / mK, and the density is 1.81g / cm3.

Embodiment 2

[0015] Put 80% expanded (acidified) graphite with 92% carbon content, 10% carbon content with 93% nano-scale (scale) graphite powder and 10% nano-scale mesophase carbon powder, and gradually put them into the high-temperature reaction furnace in an inert gas according to the proportion. Under protection, gradually increase the temperature at 350°C-500°C and mix for 3 hours to obtain a thick carbon mixed liquid, then carry out hot compression molding, the molding temperature is 450°C, and the pressure is 180MPa. 2 hours, graphitization at 3000°C for 1 hour, the thermal conductivity of the obtained material is 563W / mK, and the density is 1.89g / cm3.

Embodiment 3

[0017] Put 60% expanded (acidified) graphite with 92% carbon content, 20% nano-scale (flake) graphite powder with 93% carbon content and 20% nano-scale mesophase carbon powder into the high-temperature reaction furnace in proportion to the inert Under the protection of gas, gradually increase the temperature at 350°C-500°C and mix for 3 hours to obtain a thick carbon mixed liquid, and then carry out hot pressing molding. The molding temperature is 450°C and the pressure is 230MPa. Stay for 2 hours, graphitize at 3000°C for 1 hour, the thermal conductivity of the obtained material is 610W / mK, and the density is 1.93g / cm3.

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PUM

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Abstract

The invention relates to preparation of high-thermal-conductivity carbonaceous heat exchanging materials, particularly to a super-fine electric heating material composite processing technique. The technique comprises, firstly, selecting raw materials, by weight percentage, 40-80% exfoliated / acidized graphite with a carbon content of more than 90%, 10-30% of nanoscale flake graphite powder with a carbon content of more than 90%, and 10-30% of nanoscale intermediate-phase carbon powder to put into a high-temperature reactor gradually in proportion, controlling the temperature to be 350-500 DEG C, increasing the temperature gradually and mixing the raw materials for 2-5 hours to obtain thick carbon-mixed liquid; secondly, performing mould pressing, rolling or ejection on the thick carbon-mixed liquid in at a temperature of 350-500 DEG C and a pressure of more than 120 MPa for shaping; lastly, performing carbonization and graphitization to obtain nanoscale ultrahigh-thermal-conductivity composite materials in various shapes. The super-fine electric heating material composite processing technique is simple in process, can produce materials with high thermal conductivity and can be widely applied to manufacturing heat exchange equipment in heat management places.

Description

Technical field: [0001] The invention relates to a preparation process of a heat exchange material with high thermal conductivity of a carbonaceous electric heating material, in particular to a composite processing technology of an ultrafine electric heating material. technical background: [0002] With the development of increasingly complex electronic devices, including those capable of increased processing speeds and higher frequencies, with smaller size and more complex power requirements, and exhibiting other technological advantages, such as electronic and electrical components and There are also other components in the system, such as microprocessors and integrated circuits in high-power optics, that can generate relatively extreme temperatures. However, microprocessors, integrated circuits, and other complex electronic components typically only operate efficiently within certain critical temperature ranges. Excessive heat generated during the operation of these remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/14
Inventor 于洪洲
Owner 于洪洲