Title:
R-T-Cu-Mn-B系焼結磁石
Document Type and Number:
Japanese Patent JP4831253
Kind Code:
B2
Abstract:
An R-T-Cu-Mn-B based sintered magnet includes: 12.0 at% to 15.0 at% of R, which is at least one of the rare-earth elements that include Y and of which at least 50 at% is Pr and/or Nd; 5.5 at% to 6.5 at% of B; 0.08 at% to 0.35 at% of Cu; 0.04 at% to less than 0.2 at% of Mn; at most 2 at% (including 0 at%) of M, which is one, two, or more elements that are selected from the group consisting of Al, Ti, V, Cr, Ni, Zn, Ga, Zr, Nb, Mo, Ag, In, Sn, Hf, Ta, W, Au, Pb and Bi; and T as the balance, which is either Fe alone or Fe and Co and of which at most 20 at% is Co if T includes both Fe and Co.
Inventors:
Kuniyoshi Ta
Rintaro Ishii
Hiroyuki Tomizawa
Rintaro Ishii
Hiroyuki Tomizawa
Application Number:
JP2010516761A
Publication Date:
December 07, 2011
Filing Date:
June 11, 2009
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
H01F1/053; B22F1/00; B22F3/00; B22F3/02; B22F3/24; B22F9/04; C22C33/02; C22C38/00; H01F1/08
Domestic Patent References:
| JP2003183764A | ||||
| JP1220803A | ||||
| JP2004303909A | ||||
| JP5182816A |
Attorney, Agent or Firm:
Seiji Okuda
Osamu Kita
Osamu Kita