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Graphite block material and preparation method thereof

A graphite block and graphite technology, applied in the direction of graphite, can solve the problems of low energy utilization efficiency and limited heating energy, and achieve remarkable heat transfer effect, improve heat dissipation efficiency, and improve heat utilization efficiency

Active Publication Date: 2012-11-28
深圳石墨烯创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a heating element, it is often placed on one side of the heated component. When the existing graphite material is used as a heating element, the heat propagates in all directions, and the energy that can be transferred to the heated component for heating is limited, and the energy utilization efficiency is low.

Method used

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  • Graphite block material and preparation method thereof
  • Graphite block material and preparation method thereof
  • Graphite block material and preparation method thereof

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specific Embodiment approach 2

[0024] The difference between this specific embodiment and the first embodiment is that: in this specific embodiment, the thickness of one layer of graphite layer structure A is controlled to be 0.01-1 mm.

[0025] In this specific embodiment, because the thickness of the graphite layer structure A of the first layer is controlled at 0.01 to 1 mm, the thickness is relatively thin, and the thinner graphite layer has better elasticity, so the graphite block material can maintain performance during use, avoiding Occurrence of cracking etc. In this solution, it is required to control the thickness of the graphite layer structure to be relatively thin, and it is applicable to applications where the thickness is required to be relatively thin.

[0026]The following is a specific example: prepare an ordinary graphite layer, use it as the second layer of graphite layer structure B, coat a thin layer of ethanol solution of epoxy resin glue or phenolic resin on its surface, and then bon...

specific Embodiment approach 3

[0027] The difference between this specific embodiment and the second embodiment is: in this specific embodiment, the first layer of graphite layer structure A is prepared by isotropic and anisotropic graphite powder, and the thickness of the first layer of graphite layer structure A is It can be made thicker, ranging from 0.01 to 10 mm. In this specific embodiment, the thickness of the first layer of graphite layer structure A is 10 mm.

[0028] In this specific embodiment, since the first layer of graphite layer structure A contains isotropic and anisotropic graphite powders, the degree of thermal anisotropy of the graphite layer is compared to that made solely of anisotropic graphite powders. The degree of anisotropy of the graphite layer is low, so that the difference with the structure B of the second layer of graphite layer is reduced, so cracking during use of the graphite block material can also be avoided. At the same time, because the degree of anisotropy is reduced...

specific Embodiment approach 4

[0030] The difference between this specific embodiment and Embodiment 1 is that in this specific embodiment, the structure A of the first graphite layer is controlled to consist of multiple graphite layers with different degrees of anisotropy. Specifically, the graphite layer structure A of the first layer is obtained by stacking multiple graphite layers in sequence according to the order of the degree of anisotropy, and then carbonizing and graphitizing. When setting, the graphite layer with lower degree of anisotropy in the first layer of graphite layer structure A is in contact with the second layer of graphite layer structure B.

[0031] In this specific embodiment, in the graphite block material, its cross-sectional exploded schematic diagram is as follows Figure 4 As shown, the four graphite layers A1, A2, A3 and A4 with different degrees of anisotropy together form the first layer of graphite layer structure A, and the topmost layer is the graphite layer A1 with the hi...

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Abstract

The invention discloses a graphite block material and a preparation method thereof. The graphite block material comprises two layers of graphite layer structures, wherein the first layer of graphite layer structure is anisotropic and arranged on the second layer of graphite layer structure; the relative high thermal conductive direction of the first layer of graphite layer structure is parallel to the surface of the second layer of graphite layer structure; and the two layers of graphite layer structures are carbonized to form a whole. The graphite block material is composed of two layers of graphite layer structures, the relative high thermal conductive direction of the first layer of the graphite layer structure is parallel to the surface of the second layer of the graphite layer structure, and the two layers of graphite layer structures are carbonized to form a whole, so that the two structures are almost in 'seamless' contact, the interface thermal resistance is very low, and the heat transfer effect is remarkable. According to the graphite block material, the two structures are arranged and burnt into a whole, so that the internal heat transfer effect of the graphite block material is good, and heat dispersing or heating performance is remarkable.

Description

technical field [0001] The invention relates to a graphite material and a preparation method of the graphite material. Background technique [0002] Graphite has good thermal and electrical properties and has a wide range of applications. In terms of microstructure, graphite crystal has a layered structure and is characterized by anisotropy, and its mechanical, electrical, and thermal properties are all anisotropic. Thermal conductivity is no exception. Anisotropic graphite materials have a high thermal conductivity direction and a low thermal conductivity direction perpendicular to it. The relatively high thermal conductivity direction is the main thermal conductivity direction of the graphite material. The grains of naturally formed graphite materials are relatively small, and there are no reports of macro-sized graphite single crystals in artificial graphite. Therefore, the graphite materials used in the macro are all graphite polycrystals, and there are always some part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/22
Inventor 杜鸿达康飞宇李宝华许金造李佳贺艳兵
Owner 深圳石墨烯创新中心有限公司
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