Browse Prior Art Database

Method Of Making Finely Dispersed Magnetic Iron Particles

IP.com Disclosure Number: IPCOM000097663D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

MacKinney, HW: AUTHOR

Abstract

The method produces iron particles of a uniform size below one-tenth micron.

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This is the abbreviated version, containing approximately 100% of the total text.

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Method Of Making Finely Dispersed Magnetic Iron Particles

The method produces iron particles of a uniform size below one-tenth micron.

Ferric methoxide is dissolved in an aromatic hydrocarbon, such as toluene. This solution is heated to reflux with an unsymmetric dialkyl hydrazine, particularly, I dimethyl hydrazine. The chemical reaction produces a black suspended material which is attracted by a magnet. This black material is washed in toluene and then carbon tetrachloride. It is then dried in a current of dry, high purity nitrogen. The final product is a brown powder which consists of fine particles of less than one tenth micron, and these particles are strongly attracted by a magnet.

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