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Patent Searching and Data


Title:
FERRITE MAGNET
Document Type and Number:
WIPO Patent Application WO/2017/200091
Kind Code:
A1
Abstract:
This ferrite magnet has a magnetoplumbite structure and is characterized in that, when representing the composition ratios of the total of each metal element A, R, Fe and Me with expression (1) A1-xRx(Fe12-yMey)z, the Fe2+ content (m) in the ferrite magnet is greater than 0.1 mass% and less than 5.4 mass% (in expression (1), A is at least one element selected from Sr, Ba, Ca and Pb; R is at least one element selected from the rare-earth elements (including Y) and Bi, and includes at least La, and Me is Co, or Co and Zn). The invention makes it possible to achieve a ferrite magnet with increased Br.

Inventors:
NAGAOKA JUNNICHI (JP)
TAGUCHI HITOSHI (JP)
Application Number:
PCT/JP2017/018857
Publication Date:
November 23, 2017
Filing Date:
May 19, 2017
Export Citation:
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Assignee:
TDK CORP (JP)
International Classes:
H01F1/11; C01G49/00; C04B35/26
Domestic Patent References:
WO1998038654A11998-09-03
Foreign References:
JP2005045167A2005-02-17
JP2005064005A2005-03-10
JP2009246243A2009-10-22
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
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