Heat resistant plastic magnets

We developed new Sm-Fe-N plastic magnets that are heat resistant up to 473 K (200/spl deg/C). In order to achieve high heat resistance, we performed Zn treatment using a resin that was judged to be optimal. The Zn treatment of the Sm-Fe-N powder was carried out by Zn powder mixing using poly butylen...

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Veröffentlicht in:	IEEE transactions on magnetics 2005-10, Vol.41 (10), p.3895-3897
Hauptverfasser:	Kume, M., Hayashi, M., Yamamoto, M., Kawamura, K., Ihara, K.
Format:	Artikel
Sprache:	eng
Schlagworte:	Coercive force Cross-disciplinary physics: materials science rheology Exact sciences and technology Heat treatment Iron Magnetism Magnets Materials science Other topics in materials science Physics Plastics Powders rare earth compounds Resins Resistance heating Temperature Zinc
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Beschreibung
Zusammenfassung:	We developed new Sm-Fe-N plastic magnets that are heat resistant up to 473 K (200/spl deg/C). In order to achieve high heat resistance, we performed Zn treatment using a resin that was judged to be optimal. The Zn treatment of the Sm-Fe-N powder was carried out by Zn powder mixing using poly butylene naphthalate (PBN) resin. The Zn treatment raised the powder coercivity from 1040 to 1600 kA/m. In addition, since the melting point of PBN resin is 516 K (243/spl deg/C), a heat resistant plastic magnet was realized while maintaining the process temperature at 573 K (300/spl deg/C) or less.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2005.854944