The so-called absorbing material refers to a type of functional material that can absorb and attenuate the electromagnetic wave energy incident in space, and can reduce or eliminate reflected electromagnetic waves. Like all composite materials, absorbing composite materials are also composed of functional bodies and bodies. In engineering applications, in addition to requiring high absorption of electromagnetic waves in a relatively wide band, the materials are also required to have properties such as light weight, temperature resistance, humidity resistance, and corrosion resistance.
Common absorbing materials mainly include the following:
1. Ferrite series, metallic iron powder, polycrystalline iron fiber.
2. Carbon series, graphite, acetylene, carbon black, carbon fiber, carbon nanotube.
3. Ceramic series, silicon carbide, silicon carbide composite materials.
4. Other types, conductive polymers, chiral materials, plasma materials.