Method for manufacturing high heat conducting foam material of graphite with even apertures

A technology of high thermal conductivity graphite and foam materials, applied in the field of manufacturing high thermal conductivity graphite foam materials, can solve the problems of uneven surface tension, non-uniform pore size of foam carbon, affecting material strength and thermal conductivity, etc. The effect of uniformity, controllable density and porosity, and low manufacturing cost
CN101049928AInactive Publication Date: 2007-10-10CHINA UNIV OF MINING & TECH (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH (BEIJING)
Publication Date
2007-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses a method for preparing graphite foam material with uniform pore sizes and high heat conductivity. The method comprises: (1) placing mesophase pitch into a high-pressure reactor, adding surfactant, mixing uniformly, vacuumizing, heating to 260-350 deg.C, pressurizing to 2-6.0 MPa, heating to 450-650 deg.C, keeping for 15 min-2 h, cooling, and exhausting to obtain pitch foam; (2) heating the pitch foam at a heating rate not higher than 1 deg.C / min to 950-1100 deg.C, and carbonizing under nitrogen protection to obtain carbonized pitch foam; (3) heating the carbonized pitch foam at a heating rate not higher than 1 deg.C / min to 2500-3000 deg.C under Ar protection, and cooling naturally to obtain graphite foam material with high heat conductivity. The obtained graphite foam material can be widely used in radiators, heat exchangers, brake pads of automobiles and planes, catalyst carriers, and gas adsorbents.
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Description

technical field

[0001] The invention relates to a manufacturing method of a high thermal conductivity graphite foam material, in particular to a manufacturing method of a high thermal conductivity graphite foam material with uniform pore diameter. Background of the invention

[0002] Foamed carbon has been used in high-tech fields, including as heat / insulation materials, conductive fillers for polymers or plastics, electrodes and structural materials, etc. Carbon foam with large specific surface area and high porosity has great potential for application in these fields.

[0003] Foamed charcoal can be manufactured by using high-pressure nitriding and foaming of coal or asphalt, or using coal, asphalt, polyethylene and other raw materials with the aid of foaming agents, etc., and then solidifying the porous form at high temperature to obtain foamed charcoal.

[0004] The above foamed carbon and the foamed carbon obtained by the preparation method have poor thermal conductivi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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