Large-size high-thermal-conductivity graphite film, and production method thereof
A high thermal conductivity graphite and production method technology, applied in the field of high thermal conductivity graphite film, can solve the problems of high thermal conductivity graphite film size limitation, increasing the volume of graphitization furnace body, high thermal conductivity, etc.
Inactive Publication Date: 2015-06-10
CARETECH NEW MATERIALS TECH TAIZHOU
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Problems solved by technology
However, since graphitization is generally carried out in a graphitization furnace, and due to the limitation of the volume of the graphitization furnace body, the size of the high thermal conductivity graphite film is also limited, and generally does not exceed the cross-sectional area of the furnace body
Since the graphite film can only guarantee its continuous high thermal conductivity when it is continuous and complete, the small-size graphite film will be very limited in some fields such as large-size TVs.
However, increasing the volume of the graphitization furnace will bring about problems such as poor temperature distribution, increased power consumption, and decreased quality and efficiency.
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[0024] The large-size high thermal conductivity graphite film of the present invention and its production method will be further described in detail below.
[0025] The invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that those skilled in the art may modify the invention described herein and still achieve the beneficial effects of the invention. Therefore, the following description should be understood as the broad knowledge of those skilled in the art, but not as a limitation of the present invention.
[0026] In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention with unnecessary detail. It should be appreciated that in the development of any actual embodiment, numerous implementation de...
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Abstract
The invention discloses a large-size high-thermal-conductivity graphite film, and a production method thereof. Thermal conductivity of the large-size high-thermal-conductivity graphite film is higher than 800w / mk, length is larger than 500mm, and thickness ranges from 5 to 100<mu>m. The production method of the large-size high-thermal-conductivity graphite film comprises following steps: high molecular thin film folding is carried out before heat treatment; graphite powder is sprayed between each two layers of the high molecular thin film; and after high-temperature treatment, unfolding of an obtained thin film is carried out so as to obtain the large-size high-thermal-conductivity graphite film. The large-size high-thermal-conductivity graphite film is large in size, so that application range of graphite film is enlarged.
Description
technical field [0001] The invention relates to the field of high thermal conductivity graphite film, in particular to a large-size high thermal conductivity graphite film and a production method thereof. Background technique [0002] Graphite is an allotrope formed by carbon, in which each carbon atom combines with three adjacent carbon atoms through covalent bonds to form a hexagonal network structure. Due to its perfect molecular structure, electrons can move freely in the plane, which brings its unique thermal, electrical, chemical and other properties, and can be widely used in industries such as electronics, display, atomic energy, and national defense. In recent industrial applications, graphite film materials have been widely used in the field of electronic display products such as mobile phone and tablet computers because of their thermal conductivity far superior to metal materials, ultra-thin shape and good bending resistance. . [0003] The preparation of high ...
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IPC IPC(8): C01B31/04
Inventor 刘华斌王兵
Owner CARETECH NEW MATERIALS TECH TAIZHOU