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Preparation method of two-dimensional high-heat-conductivity graphite membrane/aluminum composite material

A technology of high thermal conductivity graphite and aluminum composite materials, which is applied in the field of preparation of two-dimensional high thermal conductivity graphite film/aluminum composite materials, can solve the problems of long preparation time, high reaction temperature, serious interface reaction between graphite film and aluminum matrix, etc., and achieve The effect of high preparation efficiency, high density and excellent thermophysical properties

Pending Publication Date: 2019-01-04
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a two-dimensional high thermal conductivity graphite film / aluminum composite material preparation method in order to solve the problems of high reaction temperature, long preparation time, and serious interface reaction between the graphite film and the aluminum matrix in the current graphite film / aluminum composite material furnace cavity

Method used

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  • Preparation method of two-dimensional high-heat-conductivity graphite membrane/aluminum composite material
  • Preparation method of two-dimensional high-heat-conductivity graphite membrane/aluminum composite material

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specific Embodiment approach 1

[0020] Embodiment 1: In this embodiment, a method for preparing a two-dimensional high thermal conductivity graphite film / aluminum composite material is carried out according to the following steps:

[0021] 1. Pretreatment graphite film and aluminum foil

[0022] Remove the residual organic matter on the surface of the graphite film, and then put it in an electric blast drying oven to dry for 5 to 10 minutes. After drying, wipe off the amorphous graphite powder on the surface of the graphite film to obtain a pretreated graphite film; remove the oxidation on the surface of the aluminum foil layer, and then put it into a vacuum drying oven to dry for 30-60 minutes to obtain a pretreated aluminum foil;

[0023] 2. Preparation of prefabricated body

[0024] Lay the pretreated graphite film and aluminum foil cross-stacked to obtain a prefabricated block, and then put it into a graphite mold to obtain a graphite film aluminum foil prefabricated body; wherein, the volume fraction o...

specific Embodiment approach 2

[0033] Specific embodiment two: this embodiment differs from specific embodiment one in that: the graphite film is a high crystallinity graphite film in step one, the thickness of the graphite film is 0.012~0.1mm, and the thermal conductivity is 600~1900W / (m· K). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum foil in step 1 is 1050, 1060, 1070, 1100, 1145, 1200, 1235, 2A11, 2A12, 3003, 3A21, 4A13, 5A02, 5052, 5082, 5083, 8006, 8011, 8011A or 8079 aluminum foil, the thickness of the aluminum foil is 0.016 ~ 0.2mm. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a two-dimensional high-heat-conductivity graphite membrane / aluminum composite material, and aims to solve the problems that a current graphite membrane / aluminum composite material is high in furnace chamber reaction temperature and long in preparation time, and interface reaction between a graphite membrane and an aluminum substrate is severe. The preparation method includes the steps: firstly, pretreating a graphite membrane and an aluminum foil; secondly, preparing a prefabricated body; thirdly, sintering the material by a spark plasma sintering method in an atmosphere protection manner. By the spark plasma sintering method, reaction time is short, so that generation of an Al4C3 phase cannot be detected, and the composite material is highin preparation efficiency, compactness and reliability and excellent in thermo-physical performance. The method is applied to the field of electronic packaging substrates.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional high thermal conductivity graphite film / aluminum composite material. Background technique [0002] The upgrading of semiconductor technology is changing with each passing day, and electronic equipment is increasingly developing in the direction of miniaturization, light weight, high performance, and multi-function. Due to the rapid increase in the integration of chips, the heat generated per unit area on integrated circuits is getting higher and higher. In order to dissipate the heat and ensure the safety and reliability of electronic equipment during use, there are higher requirements for the thermal conductivity of packaging materials. . [0003] Graphite film is a new type of high thermal conductivity material. It has a unique lamellar structure. This structure makes it have extremely high thermal conductivity in the plane of the graphite film. The thermal conductivity of the graphi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/02
CPCC04B37/021C04B2235/666C04B2237/52
Inventor 张强佟兴宇武高辉芶华松杨文澍姜龙涛陈国钦修子扬
Owner HARBIN INST OF TECH
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