Sintering of soft magnetic material under microwave magnetic field

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

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6 Citations (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.

Original languageEnglish
Article number165849
JournalPhysics Research International
Publication statusPublished - 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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