Carbon foam, a new material that simultaneously realizes the integrated management of thermal, acoustic and RF/EMI signals

In 1998, James Klett from Oak Ridge National Laboratory (ORNL) in the United States discovered a mesophase asphalt based Carbon foam porous material with an internal structure of three-dimensional interconnected pores, forming a pentagonal dodecahedral shape.(See the Figure)

As shown in the following information, Carbon foam has a series of excellent properties such as high strength, high thermal conductivity/conductivity, high temperature resistance, acid and alkali resistance, and easy structural control. It is a lightweight thermal management material, as well as a material with thermal conductivity and sound absorption properties. It can be used in the fields of thermal, acoustic, RF/EMI signal management.

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Due to its lightweight, high thermal conductivity, and efficient contact with other gas or liquid coolant, Carbon foam has been applied in thermal management of high-power equipment. Tests have shown that the thermal diffusion coefficient of Carbon foam can reach approximately 2600W/m2K when using liquid coolant, It is 10 times more than the traditional foam aluminum radiator (about 250W/m2K), and the thermal response time of Carbon foam is much shorter than that of foam aluminum.

Carbon foam's internally interconnected perforated structures can effectively absorb electromagnetic waves and reduce electromagnetic waves and vibration through the vibration of internal phonons in materials, it is currently the only material on the market that intrinsically conducts heat and absorbs sound simultaneously, which can be used in the fields of thermal, acoustic, RF/EMI signal management.