Title :
Heat resistant plastic magnets
Author :
Kume, Michiya ; Hayashi, Masaki ; Yamamoto, Muneo ; Kawamura, Kuniyasu ; Ihara, Kohei
Author_Institution :
Nichia Corp., Tokushima, Japan
Abstract :
We developed new Sm-Fe-N plastic magnets that are heat resistant up to 473 K (200°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°C), a heat resistant plastic magnet was realized while maintaining the process temperature at 573 K (300°C) or less.
Keywords :
coercive force; ferromagnetic materials; high-temperature effects; iron alloys; magnetic particles; melting point; plastics; resins; samarium alloys; 516 K; SmFeN; Zn; Zn treatment; heat resistant; magnetic powder; melting point; plastic magnets; poly butylene naphthalate res; powder coercivity; Coercive force; Heat treatment; Iron; Magnets; Plastics; Powders; Resins; Resistance heating; Temperature; Zinc; Plastics; rare earth compounds; temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854944
