Carbonyl iron: Difference between revisions
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'''Carbonyl iron''' is a highly pure |
'''Carbonyl iron''' is a highly pure (97.5% for grade S, 99.5+% for grade R) [[iron]], prepared by chemical decomposition of purified [[iron pentacarbonyl]]. It usually has the appearance of grey powder, composed of spherical microparticles. Most of the impurities are [[carbon]], [[oxygen]], and [[nitrogen]]. |
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[[BASF]] invented carbonyl iron powder in 1925<ref name = technology>{{cite web | title = Carbonyl Iron Powder: Technology | publisher = [[BASF]] | url = http://www.inorganics.basf.com/p02/CAPortal/en_GB/portal/Carbonyleisenpulver_B/content/Produktgruppen/Carbonyleisenpulver/Technologies/Allgemeine_Informationen | date = 2007-08-08 | accessdate = 2008-01-01 }}{{Dead link|date=August 2024 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> and claims to be the world's leading producer.<ref name = basf>{{cite web | title = Carbonyl Iron Powder | publisher = [[BASF]] | url = http://www.inorganics.basf.com/p02/CAPortal/en_GB/portal/Carbonyleisenpulver_0/content/Produktgruppen/Carbonyleisenpulver/Carbonyleisenpulver?add-params=MenuAction&id=Qu3oA8WDtbcp2zc |date=2007-08-08 | accessdate = 2008-01-01}}</ref> In 1934, BASF was also involved in the development of the very first magnetic tapes used by the AEG [[Magnetophon]] tape recorder. Carbonyl iron became the first magnetic recording oxide (although quickly replaced in 1936 by iron oxide). |
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It usually has the appearance of a fine grey powder, composed of spherical, non-abrasive microparticles, sometimes referred to as CIPMS (Carbonyl Iron Powder MicroSphere).<ref name="IPNA">{{cite web |website=Iron Powders of North America |title=CIPMS Carbonyl Iron Powder |date=2024 |access-date=1 August 2024 |url=https://iron-powder.com/types-of-iron-powder/cipms-carbonyl-iron-powder/}}</ref> Most of the impurities are [[carbon]], [[oxygen]], and [[nitrogen]]. |
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| ⚫ | In [[electronics]], carbonyl iron is used to manufacture [[magnetic core]]s for [[Radiofrequency coil|high-frequency coil]]s and in production of some [[ferrite (magnet)|ferrites]]. Spherical particles manufactured of carbonyl iron are used as a component of the radar absorbing materials used by the military, in [[stealth technology|stealth]] vehicles, for example. Other uses are in [[powder metallurgy]], [[metal injection molding]], and in various specialty products. |
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[[BASF]] invented carbonyl iron powder in 1925<ref name = "technology">{{cite web |title=Carbonyl Iron Powder |publisher=BASF |date=2024 |url=https://electronics-electric.basf.com/global/G-EDM-Electronic-Materials/metal-systems/carbonyl-iron-powder/2024-02-21%20CIP-Brochure_General.pdf |access-date=1 August 2024 }}</ref> and claims to be the world's leading producer.<ref name = "technology" /> In 1934, BASF was also involved in the development of the very first magnetic tapes used by the [[AEG (German company)|AEG]] [[Magnetophon]] tape recorder.<ref name="Magnetophon">{{cite web |title=1934 / Magnetophonband |website=BASF |lang=de |access-date=1 August 2024 |url=https://www.basf.com/global/de/who-we-are/history/chronology/1925-1944/1934.html}}</ref> Carbonyl iron became the first magnetic recording oxide (although quickly replaced in 1936 by iron oxide). |
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| ⚫ | In [[electronics]], carbonyl iron is used to manufacture [[magnetic core]]s for [[Radiofrequency coil|high-frequency coil]]s and in production of some [[ferrite (magnet)|ferrites]]. Spherical particles manufactured of carbonyl iron are used as a component of the radar absorbing materials used by the military, in [[stealth technology|stealth]] vehicles, for example. |
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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 [[megahertz|MHz]]. It was also found to have [[anti-knock]] properties similar to [[lead tetraethyl]].<ref name="BIOS_1575">{{cite book |series=BIOS Final Report 1575 |title= Interrogation of Dr. Leo Schlecht: Carbonyl Nickel and Carbonyl Iron Powders, their Production and Properties |publisher=HM Stationery Office |pages=28–29 |date= n.d. |orig-date=1947 |url=https://www.cdvandt.org/bios-1575.htm}}</ref> |
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[[Powdered core]]s made of carbonyl iron have high stability of parameters across a wide range of temperatures and [[magnetic flux]] levels, with excellent [[Q factor]]s between 50 kHz and 200 MHz. A popular application is in broadband [[inductor]]s, especially in high-power applications. |
[[Powdered core]]s made of carbonyl iron have high stability of parameters across a wide range of temperatures and [[magnetic flux]] levels, with excellent [[Q factor]]s between 50 kHz and 200 MHz. A popular application is in broadband [[inductor]]s, especially in high-power applications. |
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Revision as of 00:01, 2 August 2024
Carbonyl iron is a highly pure (97.5% for grade S, 99.5+% for grade R) iron, prepared by chemical decomposition of purified iron pentacarbonyl. It usually has the appearance of grey powder, composed of spherical microparticles. Most of the impurities are carbon, oxygen, and nitrogen.
BASF invented carbonyl iron powder in 1925[1] and claims to be the world's leading producer.[2] In 1934, BASF was also involved in the development of the very first magnetic tapes used by the AEG Magnetophon tape recorder. Carbonyl iron became the first magnetic recording oxide (although quickly replaced in 1936 by iron oxide).
In electronics, carbonyl iron is used to manufacture magnetic cores for high-frequency coils and in production of some ferrites. 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. Other uses are in powder metallurgy, metal injection molding, and in various specialty products.
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. A popular application is in broadband inductors, especially in high-power applications.
In pharmaceutics, carbonyl iron powder is used to treat iron deficiency and as an iron dietary supplement. 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.[3]
Particles of carbonyl iron (20–40%) suspended in a carrier fluid (60–80%) are used as a magnetorheological fluid.
See also
- Carbonyl nickel, a pure nickel prepared by decomposition of nickel carbonyl
References
 | This article needs additional citations for verification. (December 2007) |
- ^ "Carbonyl Iron Powder: Technology". BASF. 2007-08-08. Retrieved 2008-01-01.[permanent dead link]
- ^ "Carbonyl Iron Powder". BASF. 2007-08-08. Retrieved 2008-01-01.
- ^ Lee, Nicholas R.; Bikovtseva, Agata A.; Cortes-Clerget, Margery; Gallou, Fabrice; Lipshutz, Bruce H. (2017-12-05). "Carbonyl Iron Powder: A Reagent for Nitro Group Reductions under Aqueous Micellar Catalysis Conditions". Organic Letters. 19 (24): 6518–6521. doi:10.1021/acs.orglett.7b03216. ISSN 1523-7060. PMID 29206473.