Longitudinal high thermal conductivity graphite structure

Abstract

The utility model relates to a kind of longitudinal high thermal conductivity graphite structure in graphite technical field, including the carbonization of multilayer stacked base layer, the base layer is POD film coated with coating one, and the base layer of multilayer stacked is inserted with catalytic layer, and the catalytic layer is base layer coated with coating two. The coating one is the coating that carbon nanotube and hexagonal boron nitride mixed dispersion liquid spray forms. The coating two is the coating that boron carbide ethanol suspension liquid spray forms. The layer number of the base layer is 1000-10000. The layer number of base layer between adjacent two catalytic layers is 10-15. The longitudinal thermal conductivity coefficient and thermal expansion coefficient of the utility model keep excellent and uniform level, and production cost is low, and performance fluctuation between batches is small, can satisfy the efficient heat dissipation demand of high-end equipment, can provide stable heat dissipation guarantee for downstream product.

Description

Technical Field

[0001] This utility model belongs to the field of graphite technology, specifically relating to a longitudinal high thermal conductivity graphite structure. Background Technology

[0002] Graphite, due to its excellent thermal conductivity, lightweight, and chemical stability, has become an indispensable key thermal conductive material in fields such as heat dissipation for electronic devices and thermal management of new energy sources. Existing graphite thermal conductive materials exhibit strong lateral (along the plane of the graphite sheets) thermal conductivity, meeting the basic requirements of some planar heat dissipation scenarios. However, its longitudinal (perpendicular to the plane of the graphite sheets) thermal conductivity remains significantly insufficient, making it difficult to meet the high-efficiency heat dissipation requirements of high-end devices. Therefore, a graphite structure with high longitudinal thermal conductivity is needed to solve the aforementioned technical problems. Summary of the Invention

[0003] To address the aforementioned deficiencies in existing technologies, this invention provides a longitudinally high thermal conductivity graphite structure, comprising multiple stacked carbonized base layers. Each base layer is a POD film coated with a first coating. Carbonized catalyst layers are interspersed within the stacked base layers. Each catalyst layer is a base layer coated with a second coating. The POD film is an aromatic polyoxadiazepine film. In other words, a longitudinally high thermal conductivity graphite structure is formed by hot pressing and carbonizing a stacked base layer and catalyst layer.

[0004] Preferably, the coating is formed by spraying a dispersion of carbon nanotubes and hexagonal boron nitride.

[0005] Preferably, the second coating is a coating formed by spraying a boron carbide ethanol suspension.

[0006] Preferably, the number of layers in the base layer is 1000-10000.

[0007] Preferably, the number of base layers between two adjacent catalyst layers is 10-15.

[0008] This invention discloses a longitudinally high thermal conductivity graphite structure formed by sintering alternating layers of base and catalyst layers. This results in excellent and uniform longitudinal thermal conductivity and thermal expansion coefficient, meeting the core requirements of "high thermal conductivity and low thermal deformation" in fields such as 3C products, lasers, new energy vehicles, and chips. It effectively solves the problem of localized heat accumulation caused by poor heat transfer in the thickness direction, fundamentally ensuring the operational stability and service life of end products. It also exhibits minimal performance fluctuations between batches and provides stable heat dissipation for downstream products.

[0009] The beneficial effects of this utility model are: the longitudinal thermal conductivity and thermal expansion coefficient are both maintained at an excellent and uniform level, the production cost is low, the performance fluctuation between batches is small, it can meet the high-efficiency heat dissipation requirements of high-end equipment, and can provide stable heat dissipation guarantee for downstream products. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of a longitudinal high thermal conductivity graphite structure in Embodiment 1 of this utility model;

[0012] Figure 2 for Figure 1 Top view.

[0013] In the diagram: 1. Base layer; 2. Catalytic layer. Detailed Implementation

[0014] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention. Example 1

[0015] like Figure 1-2 As shown, this utility model provides a longitudinally high thermal conductivity graphite structure, including a multi-layered stacked carbonized base layer 1, wherein the base layer 1 is a POD film coated with a first coating on both sides, and a catalyst layer 2 is interspersed within the multi-layered stacked base layer, wherein the catalyst layer 2 is a base layer coated with a second coating on both sides. The POD film is an aromatic polyoxadiazole film.

[0016] The first coating is formed by spraying a dispersion of carbon nanotubes and hexagonal boron nitride.

[0017] The second coating is formed by spraying a boron carbide ethanol suspension.

[0018] The base layer has 1000 layers.

[0019] The number of base layers between two adjacent catalyst layers is 10.

[0020] In this embodiment, the longitudinal thermal conductivity of the longitudinally high thermal conductivity graphite structure is 868.19 W / (m·K). Example 2

[0021] like Figure 1-2 As shown, the difference between this embodiment and Embodiment 1 is that the number of base layers is 3351. The number of base layers between two adjacent catalyst layers is 12.

[0022] In this embodiment, the longitudinal thermal conductivity of the longitudinally high thermal conductivity graphite structure is 866.14 W / (m·K). Example 3

[0023] like Figure 1-2 As shown, the difference between this embodiment and Embodiment 1 is that the number of base layers is 10,000. The number of base layers between two adjacent catalyst layers is 15.

[0024] In this embodiment, the longitudinal thermal conductivity of the longitudinally high thermal conductivity graphite structure is 865.76 W / (m·K).

[0025] The longitudinally high thermal conductivity graphite prepared in the above embodiments exhibits good performance stability and significantly improved thermal conductivity, demonstrating excellent overall performance. It can meet the high-efficiency heat dissipation requirements of high-end equipment and provide stable heat dissipation for downstream products.

[0026] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A longitudinally high thermal conductivity graphite structure, characterized in that: It includes a multi-layered carbonized base layer, which is a POD film coated with a first coating, and a catalyst layer interspersed within the multi-layered base layer, which is a base layer coated with a second coating.

2. The longitudinally high thermal conductivity graphite structure according to claim 1, characterized in that: The first coating is formed by spraying a dispersion of carbon nanotubes and hexagonal boron nitride.

3. The longitudinally high thermal conductivity graphite structure according to claim 1, characterized in that: The second coating is formed by spraying a boron carbide ethanol suspension.

4. A longitudinally high thermal conductivity graphite structure according to claim 1, characterized in that: The number of layers in the base layer is 1000-10000.

5. A longitudinally high thermal conductivity graphite structure according to claim 1, characterized in that: The number of base layers between two adjacent catalyst layers is 10-15.

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