WO2008149785A1 - 磁性酸化鉄粒子、磁性体、および電波吸収体 - Google Patents

磁性酸化鉄粒子、磁性体、および電波吸収体 Download PDF

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WO2008149785A1
WO2008149785A1 PCT/JP2008/059976 JP2008059976W WO2008149785A1 WO 2008149785 A1 WO2008149785 A1 WO 2008149785A1 JP 2008059976 W JP2008059976 W JP 2008059976W WO 2008149785 A1 WO2008149785 A1 WO 2008149785A1
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magnetic
iron oxide
magnetic material
radio wave
oxide particle
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PCT/JP2008/059976
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English (en)
French (fr)
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Shin-Ichi Ohkoshi
Shunsuke Sakurai
Takenori Yorinaga
Kazuyuki Matsumoto
Shinya Sasaki
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The University Of Tokyo
Dowa Electronics Materials Co., Ltd.
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Application filed by The University Of Tokyo, Dowa Electronics Materials Co., Ltd. filed Critical The University Of Tokyo
Priority to EP08764894.5A priority Critical patent/EP2165975B1/en
Priority to JP2009517830A priority patent/JP5445843B2/ja
Priority to CN2008800182341A priority patent/CN101687665B/zh
Priority to US12/451,731 priority patent/US8444872B2/en
Publication of WO2008149785A1 publication Critical patent/WO2008149785A1/ja

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Abstract

【課題】 高いＨｃと高いキュリー点とを有し、且つ、これらの磁気特性を制御可能でありながら、稀少または高価な原料を必要としない磁性材料を提供する。一般式ε－ＡｘＢｙＦｅ２－ｘ－ｙＯ３または、ε－ＡｘＢｙＣｚＦｅ２－ｘ－ｙ－ｚＯ３（但し、Ａ、Ｂ、Ｃは、Ｆｅを除く互いに異なる金属、０＜ｘ，ｙ，ｚ＜１）にて表記されるε－Ｆｅ２Ｏ３を主相とする磁性酸化鉄粒子が上記課題を解決する磁性材料であることを見出した。
PCT/JP2008/059976 2007-05-31 2008-05-30 磁性酸化鉄粒子、磁性体、および電波吸収体 WO2008149785A1 (ja)

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EP08764894.5A EP2165975B1 (en) 2007-05-31 2008-05-30 Magnetic iron oxide particle, magnetic material, and radio wave absorber
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JP7303768B2 (ja) 2020-03-13 2023-07-05 富士フイルム株式会社 磁気テープ、磁気テープカートリッジおよび磁気記録再生装置
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WO2021200481A1 (ja) * 2020-03-30 2021-10-07 国立大学法人 東京大学 鉄系酸化物磁性粉およびその製造方法
DE112021004568T5 (de) 2020-10-27 2023-07-13 Panasonic Holdings Corporation Folie zum absorbieren elektromagnetischer wellen
JP7026758B2 (ja) 2020-11-27 2022-02-28 富士フイルム株式会社 磁性粉、磁性粉の製造方法、及び磁気記録媒体
JP2021047979A (ja) * 2020-11-27 2021-03-25 富士フイルム株式会社 磁性粉、磁性粉の製造方法、及び磁気記録媒体

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US20100171066A1 (en) 2010-07-08
US8444872B2 (en) 2013-05-21
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