Foamy carbon/metal-based photothermal composite material and preparation method thereof

A technology of composite materials and metal materials, applied in the field of foamed carbon/metal-based photothermal composite materials, can solve the problems of non-closed, poor toughness of foamed carbon, etc., and achieve the effect of light weight, high thermal conductivity, and rapid heat transfer process

Inactive Publication Date: 2013-05-15
中国大唐集团科学技术研究总院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a carbon foam / metal matrix photothermal composite material and its preparation method. The absorption rate, taking into account the thermal conductivity of the composite material, also solves the problem of poor toughness and non-sealed carbon foam as a photothermal material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Carbon foam / aluminum alloy sandwich structure photothermal composite material:

[0023] Using aluminum alloy (Al-0.2B) with a melting point above 600°C as the metal base material, the surface of one side of the aluminum alloy with a thickness of 3mm is softened by flame heating, and the surface temperature of the aluminum alloy is controlled below 550°C, and then the Graphitized carbon foam with a thickness of 50mm, a porosity of 50%, and a porosity of 90% is pressed on the heated surface of the aluminum alloy, and the static pressure is more than 2 hours to obtain a foamed carbon / aluminum alloy photothermal composite material. Repeat the above steps on the other side of the aluminum alloy to obtain a carbon foam / aluminum alloy sandwich structure photothermal composite material, which is suitable for use in non-high temperature working conditions.

Embodiment 2

[0025] Foam carbon / 45#steel ring photothermal composite material:

[0026] Polish the outer surface of 45# steel pipe (metal-based material) with an outer diameter of 30mm, and coat the surface with 5wt.% graphite-doped epoxy-modified high-temperature resin with a thickness of 10μm; Machining a through hole with a diameter of 30mm in the central axis of the 50mm carbon foam, and matching the annular foam carbon with the above-mentioned 45# steel pipe coated on the surface, adding JRC-681 curing agent to the gap between the two, at 100 ℃ After heat treatment at -200°C, the carbon foam / 45# steel annular photothermal composite material is obtained, which can be used as a photothermal conversion material under low concentration.

Embodiment 3

[0028] Carbon foam / nickel alloy photothermal composite material:

[0029] A nickel alloy with a melting point of about 1300°C is used as the metal base material. On the surface of a clean nickel alloy with a thickness of 1.7mm, evenly place nano-nickel powder with a thickness of 100μm and a diameter of 50nm, and statically press graphitized carbon foam with a thickness of 5mm, a porosity of 30%, and an open porosity of 70%. Its surface, under the protection of Ar gas, is slowly heated in a high-temperature muffle furnace to a temperature above 1000°C, and then cooled slowly to obtain a foamed carbon / nickel alloy photothermal composite material, which is suitable for use under high-temperature working conditions.

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Abstract

Belonging to the technical field of solar energy utilization, the invention relates to a foamy carbon/metal-based photothermal composite material. The composite material is mainly composed of a metal material as the substrate, and a layer of graphitized foamy carbon bonded on one or two surfaces of the metal material as the surface material. Surfaces of the foamy carbon and the metal material substrate are in direct connection or are connected by a transition material. The preparation method of the composite material consists of: first heating a metal-based material plate to soften or melt its surface, and then directly compounding the softened or melted metal material surface with one foamy carbon surface into a whole. With the characteristics of high heat absorption rate, high thermal conductivity, and isotropic heat conduction, the foamy carbon/metal-based photothermal composite material provided in the invention has low density, good corrosion resistance, as well as easy processability, can efficiently absorb electromagnetic waves and convert them into heat energy, and also can efficiently convert the heat energy into electromagnetic waves, thus providing a new material selection for photothermal conversion.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a carbon foam / metal matrix photothermal composite material. technical background [0002] Foamed carbon is a porous lightweight solid material with low density, low expansion coefficient, and large specific surface area, and exhibits excellent mechanical properties, thermal conductivity, and corrosion resistance. Foam carbon has two structural types, one is a non-graphitized, pentagonal dodecahedral structure with large openings and columnar ligaments, and the other is a graphitized spherical pore-like structure with uniform distribution of micropores and pores The ratio is between 30% and 90%, the average pore size is 100-600μm, and the opening ratio can be adjusted from 0 to 100% according to needs. Different from carbon materials such as graphite, carbon nanotubes, and carbon fibers, the thermal conductivity of foamed carbon has isotropic characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04B32B15/04B32B37/00B32B38/16B32B38/18
Inventor 赵骁
Owner 中国大唐集团科学技术研究总院有限公司
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