Graphite thin film with heat collecting function

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...

AI Technical Summary

Problems solved by technology

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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