Carbonyl iron
Carbonyl iron is a highly pure iron that is produced by the decomposition of purified iron pentacarbonyl .
history
Ludwig Mond , one of the co-founders of Imperial Chemical Industries , reported in 1891 at the same time as Marcelin Berthelot on the preparation of iron pentacarbonyl through the conversion of the metal with carbon monoxide . In 1924, BASF began large-scale production of iron pentacarbonyl using a process developed by Alwin Mittasch and processed it into high-purity carbonyl iron. To this day, BASF is the largest manufacturer of carbonyl iron.
use
Carbonyl iron is a gray powder made up of spherical microparticles. In 1934, BASF developed the first magnetic tapes based on carbonyl iron oxidized to iron (II, III) oxide , which were used for the Magnetophon tape recorders developed by AEG .
In electronics, carbonyl iron is used to make magnetic cores for high frequency coils and in the production of some ferrites. Spherical particles made from carbonyl iron are used as a component of radar absorbing materials in military vehicles, more precisely stealth vehicles. Other uses are in powder metallurgy, for metal injection molded parts and in various specialty products.
In the pharmaceutical industry, carbonyl iron powder is used to treat iron deficiency and as an iron diet supplement. Carbonyl iron (20-40%) suspended in a carrier liquid is used as the magnetorheological fluid .
Individual evidence
- ↑ A. Mittasch: About iron carbonyl and carbonyl iron . In: Angewandte Chemie . tape 41 , no. 30 , 1928, pp. 827-833 , doi : 10.1002 / anie.19280413002 .
- ↑ Carbonyl iron powder . BASF . Retrieved March 2, 2017.