US 7,252,795 B2 · High thermal conductivite element, method for manufacturing same, and heat radiating system

Abstract

It is an object of the present invention to provide a high thermal conductive element that has improved thermal conductivity in the layer direction while retaining the high thermal conductivity characteristics in the planar direction possessed by graphite. The present invention is a high thermal conductive element in which carbon particles are dispersed in a graphite-based matrix, wherein (1) the c axis of the graphene layers constituting the graphite are substantially parallel, (2) the thermal conductivity κ∥ in a direction perpendicular to the c axis is at least 400 W/m·k and no more than 1000 W/m·k, and (3) the thermal conductivity κ⊥ in a direction parallel to the c axis is at least 10 W/m·k and no more than 100 W/m·k.

Claims7

Dependent claims

A method for manufacturing a high thermal conductive element comprising a graphite-based matrix and carbon particles dispersed in the graphite-based matrix, the method comprising:

(1) a first step of preparing a mixture comprising a raw material capable of forming an organic polymer, and at least one type of dispersed particles selected from the group consisting of carbon particles and precursor particles thereof;
(2) a second step of forming a film in which the particles are dispersed in the organic polymer using the mixture;
and
(3) a third step of obtaining the high thermal conductive element by heat treating the film,
wherein the mixture is a mixture comprising a polyamic acid solution and at least one selected from the group consisting of carbon particles and precursor particles thereof.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/242,907Filed 5 Oct 2005 · continuation

Priority

JP 2003-30089226 Aug 2003

Published

US 2006/0035085 A116 Feb 2006

Granted

7 Aug 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification24 codes

C04B 35/63468
Obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyamides
B82Y 30/00
Nanotechnology for materials or surface science
C04B 35/522
Based on carbon, e.g. graphite: graphite
H10W 40/257
Characterised by their materials: having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh or porous structures

High thermal conductivite element, method for manufacturing same, and heat radiating system

Life of this patent

High thermal conductivite element, method for manufacturing same, and heat radiating system

Life of this patent

Abstract

Claims7