Ferromagnetic metallic powders useful for magnetic recording and processes for producing said metallic powders
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United States of America Patent
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Feb 5, 1985
Grant Date -
N/A
app pub date -
Nov 9, 1983
filing date -
Nov 29, 1982
priority date (Note) -
Expired
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Abstract
Ferromagnetic Fe-Ni alloy powders having the combination of a coercive force of 550-900 Oe (oersted) and a saturation flux density of 90-170 emu/g are provided by applying a nickel compound in a liquid to a particulate, oxygen-containing iron compound having an average particle length of 0.5-5 .mu.m and an average particle width of 0.02-0.5 .mu.m, and then drying and reducing the treated material to produce a metallic powder. The ferromagnetic powders are suitable for production of magnetic recording media because of the balanced magnetic properties.
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