Improvement of magnetization of submicron-sized high coercivity Sm2Fe17N3 powder by using hydrothermally synthesized sintering-tolerant cubic hematite
Shusuke Okada,
Kazuyuki Suzuki,
Eri Node,
Kenta Takagi,
Kimihiro Ozaki,
Yasushi Enokido
Affiliations
Shusuke Okada
Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Kazuyuki Suzuki
Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Eri Node
Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Kenta Takagi
Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Kimihiro Ozaki
Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Yasushi Enokido
Materials Development Center, TDK Corporation, 570-2 Matsugasita, Minamihadori, Narita 268-8588, Japan
We investigated the cause of forming of aggregates which decreases magnetization of a submicron-sized Sm2Fe17N3 powder. The aggregation was considered to be caused through sintering and growth of α-Fe particles in a hydrogen reduction treatment. We newly synthesized cubic hematite powder which has tolerance for the sintering of particles in a hydrogen reduction treatment. The aggregation of submicron-sized Sm2Fe17N3 particles was significantly reduced by using the cubic hematite as a precursor, and the magnetization was improved without decreasing the high coercivity.
