Composite graphite material and application thereof serving as thermal wave transformation material

Abstract

A composite graphite material is prepared from, by weight, 70%-100% of expandable graphite, 0-30% of a quasi-graphene material and 0-30% of carbon nanotubes, wherein multiple superfine-branch-shaped structures and gaps are formed on the surfaces of the composite graphite material through galling treatment, and the density of the composite graphite material is 0.01 g / cm<3>-1.5 g / cm<3>. The invention further relates to application of the composite graphite material in a thermal wave transformation material. The composite graphite material has the following advantages of achieving the high thermal wave transformation efficiency at low temperature (10 DEG C-50 DEG C), utilizing the directional thermal conductivity of graphite and being high in thermal conduction efficiency and speed and low in cost; the application of the composite graphite material serving as the thermal wave transformation material has the following advantages that the thermal wave transformation material achieves two-way low-temperature transformation between infrared ray waves and thermal energy and heating and refrigerating in a space.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a composite graphite material. In addition, the present invention also relates to the application of the composite graphite material as a thermal wave conversion material. Background technique [0002] According to the laws of thermophysics, all objects with a temperature higher than absolute zero can produce thermal radiation. When heat radiation is projected on the surface of an object, the three phenomena of absorption, reflection and penetration occur. The greater the heat radiation rate, the greater the proportion of the energy radiated from the surface material to the absorbed energy. [0003] Compared with heat conduction and heat convection, heat radiation has the advantage of not needing contact and medium. Existing heat radiation sources are generally made of metal materials, and the heat wave conversion efficiency at room temperature is only 20%-30%, w...

AI Technical Summary

Problems solved by technology

Existing heat radiation sources generally use metal materials, and the heat wave conversion efficiency at room temperature is only 20%-30%, which has the problem of low efficiency

And it is difficult to directly use metal materials as heat radiation and heat absorbing materials to realize wave heat conversion

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