Sintering of soft magnetic material under microwave magnetic field

Sadatsugu Takayama, Jun Fukushima, Junichi Nishijo, Midori Saito, Saburo Sano, Motoyasu Sato

研究成果: Article査読

6 被引用数 (Scopus)


We have developed a simple process for sintering of soft magnetization materials using microwave sintering. The saturated magnetization (Ms) of sintered magnetite was 85.6emu/g, which was as high as 95 of magnetite before heating (90.4emu/g). On the other hand, the averaged remanence (Mr) and coercivity (Hc) of the magnetite after heating were 0.17emu/g and 1.12Oe under measuring limit of SQUID, respectively. For the sintering process of soft magnetic materials, magnetic fields of microwave have been performed in nitrogen atmosphere. Therefore, a microwave single-mode system operating at a frequency of 2.45GHz and with a maximum power level of 1.5kW was used. We can sinter the good soft magnetic material in microwave magnetic field. The sample shrank to 82% theoretical density (TD) from 45%TD of green body. The sintered sample was observed the microstructure by TEM and the crystal size was estimated the approximate average size is 10nm.

ジャーナルPhysics Research International
出版ステータスPublished - 2012

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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