Artificial graphite film heat conduction and heat dissipation material with composite structure and preparation method of artificial graphite film heat conduction and heat dissipation material with composite structure

Abstract

The invention discloses an artificial graphite film heat conduction and heat dissipation material with a composite structure and a preparation method of the artificial graphite film heat conduction and heat dissipation material with the composite structure. The artificial graphite film heat conduction and heat dissipation material with the composite structure comprises a heat conduction layer A and a single-sided or double-sided heat dissipation layer B, wherein the heat dissipation layer is directly combined with the heat conduction layer or is combined with the heat conduction layer through combining a transition layer C; the composite structure of the heat dissipation material is an AB type, an ACB type, an ABA type, an ACBCA type or an ACBA type; the heat conduction layer has a relatively high heat conduction coefficient and a point heat source subjected to heat dissipation is dispersed into a surface heat source; and the heat dissipation layer has a relatively high black-body radiation coefficient and has relatively high absorption capacity on heat of the heat source and relatively high outward thermal radiation capacity. The preparation method of the artificial graphite film heat conduction and heat dissipation material with the composite structure comprises the following steps of (1) obtaining the heat conduction layer or a heat conduction layer precursor; (2) uniformly coating a single side or double sides of the heat conduction layer or the heat conduction layer precursor with heat dissipation layer slurry and drying to form the heat dissipation layer; and (3) carrying out calendaring to obtain the artificial graphite film heat conduction and heat dissipation material with the composite structure.

Description

technical field

[0001] The invention relates to a heat conduction and heat dissipation composite material and a preparation method thereof, in particular to a composite structure artificial graphite film heat conduction heat dissipation material and a preparation method thereof, belonging to the field of electric conduction and heat conduction materials. Background technique

[0002] With the rapid development of microelectronics integration technology, the size and volume of electronic components are shrinking sharply. The resulting heat dissipation difficulties have seriously affected the accuracy and life of electronic devices, and have become the technical bottleneck of device miniaturization. This restricts the further development of integrated technology. Traditional heat-conducting materials are mainly metal materials, such as copper, aluminum, silver, etc. However, metal materials have high density and high expansion coefficient, which cannot meet the application req...

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