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