Magnetic Iron Oxide Particle, Magnetic Material, and Radio Wave Absorber
Disclosed is a magnetic material having high Hc and High Curie point, which is capable of controlling such magnetic characteristics without requiring rare or expensive raw materials. Specifically disclosed is a magnetic material composed of particles of a magnetic iron oxide which is represented by the following general formula: [epsilon]-AxByFe2-x-yO3 or [epsilon]-AxByCzFe2-x-y-zO3 (wherein A, B and C each represents a metal excluding Fe and different from each other, satisfying 0
The present invention relates to a magnetic iron oxide particle that can be applied to a high density magnetic recording medium and a radio wave absorber, and relates to a magnetic material and a radio wave absorber using this magnetic iron oxide particle.
The magnetic iron oxide particles according to the present invention are excellent in heat stability, and a coercive force can be arbitrarily controlled, by replacing a part of a Fe<3+> ion site with mutually different two kinds or three kinds of metal elements. As a result, by applying the magnetic iron oxide particles of the present invention, a range of an external factor allowable in designing each kind of magnetic material and radio wave absorber is expanded, thus making it possible to perform material design with further flexibility.
OHKOSHI SHIN-ICHI [JP]; SAKURAI SHUNSUKE [JP]; YORINAGA TAKENORI [JP]; MATSUMOTO KAZUYUKI [JP]; SASAKI SHINYA [JP]
Type of Offer:
« More Material Science Patents« More Telecommunications Patents