Bonded thin cylinder magnets using Sm-Fe-N anisotropic powder

Author

Ohmori, Keji ; Hayashi, Shin´ichiro ; Sato, Takao

Author_Institution

Ichikawa Res. Lab., Sumitomo Metal Min. Co. Ltd., Tokyo, Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

943

Lastpage

944

Abstract

A cylindrical multipole oriented magnet is made from anisotropic SmFeN fine powder using injection molding. Unsaturated polyester resin serves as a binder instead of the conventional polyamide resin. The viscosity of the compound in a heated mold decreases quickly at first and increases with hardening. The lower the viscosity, the easier the compound penetrates thin areas in the mold and the easier it is for the magnetic field to orient the crystal axis. The shrinkage rate of unsaturated polyester resin can be controlled by additives.

Keywords

ferromagnetic materials; injection moulding; iron compounds; magnetic particles; nitrogen compounds; permanent magnets; resins; samarium compounds; shrinkage; viscosity; SmFeN; additives; binder; bonded thin cylinder magnet; crystal axis; hardening; heated mold; injection molding; isotropic fine powder; shrinkage rate; unsaturated polyester resin; viscosity; Anisotropic magnetoresistance; Bonding; Electromagnets; Iron; Magnetic field measurement; Magnetic fields; Magnetic flux density; Magnets; Powders; Pulse measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463900

Filename

1463900