FERRITE PARTICLE AND PRODUCTION METHOD THEREOF

WIPO Patent Application WO/2013/021521

A1

Ferrite powder is provided which comprises W-type ferrite phase for developing high magnetic characteristics. The ferrite powder according to the present invention is characterized by comprising a laminar structure exhibiting a state where W-type ferrite phases are laminated in an easy direction of magnetization, the W-type ferrite phases comprising a compound expressed by AM2Fe16O27, where A, M, Fe, and O represent a first metal element (Sr, Ba, Ca, Pb, etc), a second metal element (Fe, Zn, Cu, Co, Mn, Ni, etc), iron, and oxygen, respectively. This ferrite particle is obtained through: a shape forming step that shapes a mixed powder in a magnetic field to obtain a compact, the mixed powder comprising for example an M-type ferrite particle comprising a compound expressed by AFe12O19 and a spinel-type ferrite particle (S-type ferrite particle) comprising a compound expressed by MFe2O4; a calcination step that calcines the compact to obtain a calcined substance; and a milling step that mills the calcined substance.

KANEKO YUJI (JP)
UTSUNO SEISHI (JP)

PCT/JP2012/002102

February 14, 2013

March 27, 2012

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TOYOTA CHUO KENKYUSHO KK (JP)
KANEKO YUJI (JP)
UTSUNO SEISHI (JP)

C04B35/26; H01F1/10

WO1997035815A1	1997-10-02
WO2005056493A1	2005-06-23

JP2003133119A	2003-05-09
JP2007031204A	2007-02-08
JP2000501893A	2000-02-15
JP2005001950A	2005-01-06
JP2006135238A	2006-05-25
JP2007031204A	2007-02-08

MORIOKA, Masayuki et al. (Meieki Forest Bldg. 6F 23-17, Meieki 5-chome,,Nakamura-ku, Nagoya-sh, Aichi 02, JP)

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