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Title:
R-T-B系希土類永久磁石
Document Type and Number:
Japanese Patent JP4763290
Kind Code:
B2
Abstract:
A sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements include Y), and T represents one or more transition metal elements essentially containing Fe, or Fe and Co), and a grain boundary phase containing a higher amount of R than the main phase, wherein a platy or acicular product exists. This sintered body enables to inhibit the grain growth, while keeping a decrease in magnetic properties to a minimum, and to improve a suitable sintering temperature range.

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Inventors:
Goichi Nishizawa
Riki Ishizaka
Tetsuya Hidaka
Ryo Fukuno
Yoshinori Fujikawa
Application Number:
JP2004539579A
Publication Date:
August 31, 2011
Filing Date:
September 30, 2003
Export Citation:
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Assignee:
tdk Corporation
International Classes:
H01F1/053; C22C1/04; C22C28/00; C22C30/00; C22C38/00; C22C38/06; C22C38/10; C22C38/14; C22C38/16; H01F1/055; H01F1/057; H01F1/08; H01F41/02
Domestic Patent References:
JP200275717A
JP9223617A
JP7130522A
JP7176414A
JP1064712A
JP2002164239A
Attorney, Agent or Firm:
Mitsuru Oba



 
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