Spherical particles manufactured of carbonyl iron are used as a component of the radar absorbing materials used by the military, in stealth vehicles, for example.
[3] Carbonyl iron powder was used in Germany during World War II in the manufacture of radio frequency equipment, including radio transmitters and receivers, low hysteresis induction coils, filter and choke coils: higher grades were found to be especially suitable for carrier wave frequencies over 100 MHz.
[4] Powdered cores made of carbonyl iron have high stability of parameters across a wide range of temperatures and magnetic flux levels, with excellent Q factors between 50 kHz and 200 MHz.
[5] It can efficiently handle alternating current (AC) signals at high frequencies, improving performance in power supplies, RF applications, and telecommunications.
[8] In 2017 carbonyl iron powder was reported as an effective reductant for aromatic nitro groups in water, an important reaction used in the synthesis of pharmaceuticals.