Magnetic metal particles containing iron as main component,...

Details Magnetic metal particles containing iron as main component,... Magnetic metal particles containing iron as main component,...

2007-02-06

2007-02-06

Mai, Ngoclan T. (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

C075S363000, C148S105000, C148S306000, C252S062540, C428S693100

Reexamination Certificate

active

10305353

ABSTRACT:
Magnetic metal particles containing iron as a main component, comprising cobalt in an amount of usually 20 to 50 atm %, calculated as Co, based on whole Fe, aluminum in an amount of usually 3 to 15 atm %, calculated as Al, based on whole Fe and a rare earth element in an amount of usually 3 to 20 atm %, calculated as rare earth element, based on whole Fe, and having an average major axis diameter of usually 0.02 to 0.065 μm, preferably from 0.02 to less than 0.05 μm, a coercive force of usually 159.2 to 222.9 kA/m (2,000 to 2,800 Oe), a soluble Na content of usually not more than 30 ppm, a soluble Ca content of usually not more than 100 ppm, and an oxidation stability Δσs of usually not more than 10%.

REFERENCES:
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patent: 5735969 (1998-04-01), Lown et al.
patent: 6299973 (2001-10-01), Hayashi et al.
patent: 6663939 (2003-12-01), Sasaki
patent: 0827137 (1998-03-01), None
patent: 0999185 (2000-05-01), None
patent: 1065675 (2001-01-01), None

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