Ferrite powder for bonded magnets, method for producing the same and ferrite bonded magnet
AssigneesDowa Electronics Materials Co., Ltd., Dowa F-Tec Co., Ltd.
InventorsSatoru Tsuboi, Yasunobu Mishima, Keisuke Ayabe, Masayasu Senda
Life of this patent
Estimating the term…
Abstract
A ferrite powder for bonded magnets having a high iHc value usable even in a low temperature environment, a method for producing the same, and a bonded magnet using the ferrite powder and having high iHc value which can be used even in a low temperature environment, wherein a specific surface area is 2.20 m2/g or more and less than 3.20 m2/g; a compression density is 3.30 g/cm3 or more and less than 3.60 g/cm3, and a compressed molding has a coercive force of 3250 Oe or more and less than 3800 Oe.
Claims1
A ferrite powder for bonded magnets, wherein:
- a specific surface area is 2.20 m2/g or more and less than 3.20 m2/g;
- a compression density is 3.30 g/cm3 or more and less than 3.60 g/cm3, and
- a coercive force of the ferrite powder after having been compressed under a pressure of 2 tons/cm2 is 3250 Oe or more and less than 3800 Oe.
Dependencies are inferred from the claim text.