Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1989-12-29
1994-01-11
Resan, Stevan A.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
148105, 148300, 148311, 148315, 420 8, 420 13, 420 87, 420128, C22C 3800, B22F 900
Patent
active
052779777
ABSTRACT:
Ultrafine particles of Fe-Co-P material with a Fe/Co atomic ratio of from 95/5 to 70/30 and a (Fe+Co)/P atomic ratio of from 85/15 to 60/40 show improved ferromagnetic properties. The average particle size is from 0.005 to 0.1 .mu.m. Such ultrafine particles are prepared through gas phase reaction by evaporating a source material. They are useful in both magnetic and thermomagnetic recording media ensuring high density recording.
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Corner, W. D. et al. "Properties of Ferromagnetic Micropowders" J. Magnetism and Magnetic Materials (20) 148-157 (1980).
Tokuoka Yasumichi
Yoshinari Jiro
Resan Stevan A.
TDK Corporation
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