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Formation of Cobalt Modified Iron Oxide

IP.com Disclosure Number: IPCOM000091813D
Original Publication Date: 1968-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Haines, RS: AUTHOR

Abstract

Magnetic particles are usually prepared in an aqueous media. Particles produced in an aqueous system must normally be separated from the system and dried before they are distributed in a nonaqueous media such as a polymeric binder.

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Formation of Cobalt Modified Iron Oxide

Magnetic particles are usually prepared in an aqueous media. Particles produced in an aqueous system must normally be separated from the system and dried before they are distributed in a nonaqueous media such as a polymeric binder.

Cobalt modified iron oxide, prepared in a di-alkyl sulfoxide solvent, is compatible with most nonaqueous media without being separated and dried. Such products are prepared by the addition of aqueous sodium hydroxide to a solution of cobalt and iron salts dissolved in a di-alkyl sulfoxide such as dimethyl sulfoxide. This results in the formation of cobalt modified iron oxide without any additional oxidation or reduction steps.

The particles thus formed are not agglomerated and are easily dispersed in a suitable nonaqueous media such as a polymeric binder system. If desired, the water can be extracted by standard methods.

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