US 7,563,330 B2
Magnetic material and manufacturing method thereof
Hideyuki Tsuji, Yokohama (Japan); Akiko Saito, Kawasaki (Japan); and Tadahiko Kobayashi, Yokohama (Japan)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan)
Filed on May 01, 2006, as Appl. No. 11/414,302.
Claims priority of application No. P2005-141410 (JP), filed on May 13, 2005.
Prior Publication US 2006/0254385 A1, Nov. 16, 2006
Int. Cl. H01F 1/055 (2006.01)
U.S. Cl. 148—101  [148/301; 148/302] 20 Claims
OG exemplary drawing
 
1. A manufacturing method of a magnetic material, comprising:
preparing a powder raw material by mixing at least two of powders selected from a powder A, a powder B, a powder C, and a powder D, where the powder A is at least one selected from an elemental powder of element R, and the element R is at least one selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb, the powder B is at least one selected from an elemental powder of element T, and the element T is at least one selected from Fe, Co, Ni, Mn, and Cr, the powder C is at least one selected from an elemental powder of element M, and the element M is at least one selected from Si, B, C, Ge, Al, Ga, and In, and the powder D is at least one selected from compound powders composed of at least two of elements among the element R, the element T, and the element M; and
forming a sintered body of the magnetic material having an NaZn13 crystal structure phase by heating the powder raw material while applying a pressure.