公开(公告)号：US20180147625A1

公开(公告)日：2018-05-31

申请号：US15882476

申请日：2018-01-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru TAKAHASHI ,  Kazuhiro HENMI ,  Noriharu YODOSHI ,  Akihiro MAKINO

IPC: B22F1/00 ,  B22F9/08 ,  B22F5/00 ,  C22C38/16 ,  C22C38/10 ,  C22C38/08 ,  C22C38/02 ,  C22C38/00 ,  H01F1/147 ,  H01F27/255 ,  H01F27/28 ,  H01F1/153

CPC classification number: B22F1/0011 ,  B22F5/00 ,  B22F9/082 ,  B22F2005/004 ,  B22F2009/0824 ,  B22F2301/35 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/16 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/14741 ,  H01F1/15308 ,  H01F1/15375 ,  H01F17/04 ,  H01F27/255 ,  H01F27/28 ,  H02K1/02 ,  B22F2201/013 ,  B22F2201/02 ,  B22F2201/11 ,  B22F1/0059 ,  B22F3/02 ,  B22F5/106

Abstract: A soft magnetic powder according to the present disclosure comprises a particle having no hollow part as a main component, wherein a number of hollow particle present in a region of 2.5 mm square is 40 or less in a cross section of a molded body obtained by powder-compacting and molding the soft magnetic powder so as to have a volume filling rate of 75% or more and 77% or less (i.e., from 75% to 77%).

公开(公告)号：US20170321308A1

公开(公告)日：2017-11-09

申请号：US15661520

申请日：2017-07-27

Applicant: Murata Manufacturing Co., Ltd. ,  Tohoku Magnet Institute Co., Ltd.

Inventor： Toru TAKAHASHI ,  Kazuhiro HENMI ,  Akihiro MAKINO ,  Noriharu YODOSHI

IPC: C22C38/02 ,  H01F41/02 ,  H01F3/08 ,  C22C38/00 ,  B22F9/08 ,  B22F3/02 ,  C22C45/02 ,  H02K1/02 ,  B22F3/24

CPC classification number: C22C38/02 ,  B22F1/00 ,  B22F3/00 ,  B22F3/02 ,  B22F3/24 ,  B22F9/08 ,  B22F9/082 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2009/0848 ,  B22F2301/35 ,  C22C38/00 ,  C22C38/002 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/153 ,  H01F1/22 ,  H01F3/08 ,  H01F41/0246 ,  H02K1/02

Abstract: A magnetic powder is represented by general formula Fea(SibBcPd)100-a, and is produced with a gas atomization method. When the value of a and the value of b in the general formula is represented (a, b), (a, b) is within a predetermined region V1. Similarly, (a, c) and (a, d) are within a predetermined region, respectively. Whereby, it is possible to obtain an alloy magnetic powder which has high saturation magnetic flux density, low magnetic loss, and is spherical and easy to handle; and a magnetic core, a variety of coil components, and a motor can be realized by using the magnetic material.

公开(公告)号：US20170320138A1

公开(公告)日：2017-11-09

申请号：US15661583

申请日：2017-07-27

Applicant: Murata Manufacturing Co., Ltd. ,  Tohoku Magnet Institute Co., Ltd.

Inventor： Toru TAKAHASHI ,  Akihiro MAKINO ,  Noriharu YODOSHI

IPC: B22F9/08 ,  B22F3/02 ,  H01F3/08 ,  H01F41/02 ,  B22F3/24 ,  C22C38/02 ,  C22C38/16 ,  C22C45/02 ,  H02K1/02 ,  C22C38/00

CPC classification number: B22F9/082 ,  B22F1/00 ,  B22F3/00 ,  B22F3/02 ,  B22F3/24 ,  B22F9/08 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2009/0848 ,  B22F2301/35 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/16 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/14 ,  H01F1/22 ,  H01F3/08 ,  H01F41/0246 ,  H02K1/02

Abstract: A magnetic powder is represented by general formula FeaSibBcPdCue. 71.0≦a≦81.0, 0.14≦b/c≦5, 0≦d≦14, 0

公开(公告)号：US20180154434A1

公开(公告)日：2018-06-07

申请号：US15881299

申请日：2018-01-26

Applicant: Murata Manufacturing Co., Ltd. ,  Tohoku Magnet Institute Co., Ltd.

Inventor： Kazuhiro HENMI ,  Toru TAKAHASHI ,  Noriharu YODOSHI ,  Akihiro MAKINO

IPC: B22F1/00 ,  B22F9/08 ,  B22F5/00 ,  C21D6/00 ,  C22C45/02 ,  H01F3/08 ,  H01F41/02 ,  H01F17/04 ,  C22C38/16 ,  C22C38/10 ,  C22C38/02 ,  C22C38/00

CPC classification number: B22F1/0007 ,  B22F1/0059 ,  B22F5/00 ,  B22F9/082 ,  B22F2005/004 ,  B22F2301/35 ,  B22F2304/00 ,  B22F2998/10 ,  C21D6/001 ,  C21D6/007 ,  C21D6/008 ,  C21D2201/03 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/105 ,  C22C38/16 ,  C22C45/02 ,  C22C2200/02 ,  C22C2202/02 ,  H01F1/15308 ,  H01F1/15333 ,  H01F1/15375 ,  H01F3/08 ,  H01F17/04 ,  H01F17/045 ,  H01F41/0246 ,  H01F2017/048 ,  H02K1/02 ,  B22F3/02 ,  B22F2003/248

Abstract: A soft magnetic powder according to the present disclosure comprises a particle which comprises a plurality of nanosized crystallites and an amorphous phase existing around the crystallites, wherein the crystallites have an average grain diameter of 30 nm or less, and the amorphous phase has an average thickness of 30 nm or less; and wherein when a minor axis of a cross section of the particle is determined as r, an average Fe concentration in the amorphous phase is lower than an average Fe concentration in the crystallites in a region where a depth from a surface of the particle is 0.2 r or more and 0.4 r or less.