Title:
フェライト焼結磁石及びその製造方法
Document Type and Number:
Japanese Patent JP5929764
Kind Code:
B2
Abstract:
A sintered ferrite magnet having a main phase composed of ferrite having a hexagonal, M-type magnetoplumbite structure, a grain boundary phase containing Si and Ca with a lower atomic ratio of La than in said main phase, and a third phase containing La at a higher atomic ratio than in said main phase, and a method for producing a sintered ferrite magnet having said third phase by calcining starting materials with more La than Ca, adding more than 1% and 1.8% or less by mass of SiO 2 and 1-2% by mass (calculated as CaO) of CaCO 3 to the calcined body, and pulverizing, molding and sintering it.
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Inventors:
Yoshinori Kobayashi
Kawada Tsunehiro
Kawada Tsunehiro
Application Number:
JP2012550936A
Publication Date:
June 08, 2016
Filing Date:
December 26, 2011
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
H01F1/11; C01G49/00; C01G51/00; C04B35/26; H01F41/02
Domestic Patent References:
| JP2010001171A | 2010-01-07 | |||
| JP2003151811A | 2003-05-23 | |||
| JP2001068319A | 2001-03-16 | |||
| JP2008137879A | 2008-06-19 | |||
| JP2006117515A | 2006-05-11 | |||
| JP2003151811A | 2003-05-23 | |||
| JP2001068319A | 2001-03-16 | |||
| JP2008137879A | 2008-06-19 | |||
| JP2006117515A | 2006-05-11 | |||
| JP2010001171A | 2010-01-07 |
Foreign References:
| WO2008146712A1 | 2008-12-04 | |||
| WO2008105449A1 | 2008-09-04 | |||
| WO2007060757A1 | 2007-05-31 | |||
| WO2011001831A1 | 2011-01-06 | |||
| WO2008146712A1 | 2008-12-04 | |||
| WO2008105449A1 | 2008-09-04 | |||
| WO2007060757A1 | 2007-05-31 | |||
| WO2011001831A1 | 2011-01-06 |
Attorney, Agent or Firm:
Takaishi Tachibana