Method for the preparation of small cobalt particles
Abstract
Abstract FINE PARTICLES OF MAGNETIC MATERIALS ARE THE BASIC OPERATIONAL CONSTITUENTS OF DEVICES SUCH AS PERMANENT MAGNETS AND MAGNETIC RECORDING TAPES. THE USE OF FINE COBALT PARTICLES FOR SUCH DEVICES HAS BEEN LIMITED BY THE DIFFICULTY OF PRODUCING SUCH PARTICLES WITH THE MAGNETICALLY MORE DESIRABLE HEXAGONAL CRYSTAL STRUCTURE. THE DISCLOSURE HERE CONTEMPLATES THE PRODUCTION OF FINE PARTICLES CONTAINING HEXAGONAL METALLIC COBALT BY A SIMPLE AND POTENTIALLY ECONOMIC PROCESS INVOLVING PRECIPITATION FROM SOLUTION BY A STRONG REDUCING AGENT. THIS PROCESS CAN BE SUCCESSFULLY PERFORMED IF THE SOLUTION CONTAINS MINOR QUANTITIES OF IONS OF CR, PT, AS, CA, GE AND/OR TA IN ADDITION TO COBALT IONS.
Inventors
- 👤 Brian G Bagley
- 👤 James Nicholas Carides
Bibliographic Details
Claims Analysis
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