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A technology of graphite and thin film, applied in the field of graphite thin film with heat collection function, can solve the problems of manpower consumption, serious heat loss, environmental pollution during the process, etc., so as to reduce heat loss, improve heat energy absorption rate, and avoid environmental pollution. Effect
Inactive Publication Date: 2018-12-14
山西臣功新能源科技有限公司
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This method has brought a series of problems: serious heat loss, low heat conduction efficiency, increased cost, environmental pollution during the process, and labor-intensive
[0005] In view of the shortcomings of the current solar thermal collectors with low thermal energy utilization, graphene materials are also used to improve it, and graphene-based solar thermal collectors have been developed to improve its performance, but they are usually used on the surface of the carrier The way of spraying graphene coating will cause environmental pollution and the problem of unsatisfactory thermal conductivity
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Embodiment 1
[0020] Take by weighing expanded graphite 80kg, boron nitride 8kg, silicon carbide 10kg, wherein, expanded graphite is 300 orders, after above-mentioned three kinds of raw materials are mixed uniformly, be made into film shape through mechanical pressing, make graphite thin film.
[0021] The above-mentioned graphite thin film is applied in the solar heat collecting device, such as Figure 1-2 As shown, it includes a base plate 1, an insulation layer 3, a side plate 2, an inner tank 4, and a transparent cover plate 5. Two U-shaped support frames 10 are fixed on the base plate 1, and the base plate 1 and the side plate 2 are connected and fixed to form a groove. , the inner wall of the groove is provided with a thermal insulation layer 3 made of ceramic fiber material, and an inner tank 4 is fixed on the support frame 10. The upward surface of the inner tank 4 is a high thermal conductivity graphite film 9, and the side and bottom surface of the inner tank 4 are made of stainles...
Embodiment 2
[0023] Take by weighing: expanded graphite 85kg, boron nitride 8kg, silicon carbide 8kg, wherein, expanded graphite is 400 mesh, after above-mentioned three kinds of raw materials are mixed uniformly, through mechanical pressing into film shape, make graphite film.
Embodiment 3
[0025] Take by weighing: expanded graphite 90kg, boron nitride 5kg, silicon carbide 5kg, graphene 20kg, wherein, expanded graphite is 350 mesh, after above-mentioned three kinds of raw materials are mixed uniformly, through mechanical pressing into film shape, make graphite film.
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Abstract
The invention discloses a graphite thin film with a heat collecting function, and relates to the technical field of new graphite materials. The graphite thin film comprises the following raw materialsof, by weight, 80-90 parts of expansion graphite, 5-10 parts of boron nitride and 5-10 parts of silicon carbide. The graphite thin film is formed by the three raw materials which are evenly mixed andthen pressed. The graphite thin film with the heat collecting function can directly serve as a heat absorbing plate to be applied to a solar device and can directly make contact with a heat absorbingmedium, the heat loss is reduced, the heat conducting efficiency is reinforced, the complex machining process of a traditional heat absorbing plate is simplified, and the environmental pollution problem brought in the spraying process of the traditional heat absorbing plate is avoided; and compared with the traditional heat absorbing plate or heat absorbing coating, the heat energy absorption rate is increased, and the heat loss rate is decreased.
Description
technical field [0001] The invention relates to the technical field of new graphite materials, in particular to a graphite film with heat collecting function. Background technique [0002] As a new type of functional carbon material, expanded graphite (Expanded Graphite, EG for short) is a loose and porous worm-like substance obtained from natural graphite flakes through intercalation, water washing, drying, and high-temperature expansion. In addition to the excellent properties of natural graphite itself, such as cold and heat resistance, corrosion resistance, and self-lubrication, EG also has softness, compression resilience, adsorption, ecological environment coordination, biocompatibility, and radiation resistance that natural graphite does not have. and other characteristics. Expanded graphite can instantly expand its volume by 150-300 times when exposed to high temperature, changing from flake to worm-like, resulting in a loose structure, porous and curved, enlarged s...
Claims
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