公开(公告)号：US20230047154A1

公开(公告)日：2023-02-16

申请号：US17879862

申请日：2022-08-03

Applicant: TDK CORPORATION

Inventor： Katsushi YASUHARA ,  Ryoma NAKAZAWA ,  Yusuke TANIGUCHI ,  Hiroyuki ONO

IPC: H01F1/147 ,  C22C38/02 ,  H01F5/00 ,  H01F1/20

Abstract: A soft magnetic alloy powder contains soft magnetic alloy particles. The soft magnetic alloy particles contain Fe and Si. The soft magnetic alloy particles each include crystal grains and crystal grain boundary between the crystal grains. At least one of the crystal grains has a Si segregation part.

公开(公告)号：US20220406501A1

公开(公告)日：2022-12-22

申请号：US17831665

申请日：2022-06-03

Applicant: TDK CORPORATION

Inventor： Yusuke TANIGUCHI ,  Junichi SEKI ,  Junichi SHIMAMURA

IPC: H01F1/28 ,  C08G59/24 ,  C08K9/02

Abstract: A dust core includes a binder and magnetic particles. The binder includes an epoxy resin. The magnetic particles are dispersed in the binder. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain.

公开(公告)号：US20180025822A1

公开(公告)日：2018-01-25

申请号：US15656242

申请日：2017-07-21

Applicant: TDK CORPORATION

Inventor： Yu YONEZAWA ,  Tomofumi KURODA ,  Yusuke TANIGUCHI

IPC: H01F1/20 ,  B22F1/00 ,  B22F1/02

CPC classification number: H01F1/20 ,  B22F1/0014 ,  B22F1/0048 ,  B22F1/0062 ,  B22F1/02 ,  B22F3/02 ,  B22F9/04 ,  B22F2009/044 ,  C22C33/02 ,  C22C33/0292 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C2202/02 ,  H01F1/26 ,  H01F41/0246

Abstract: A soft magnetic metal dust core including a soft magnetic metal powder and a nonmagnetic material, in which when observing a field of view including “n”, a natural number of 50 or more, particles of the soft magnetic metal powder on a grinded smooth cross section of the dust core, the soft magnetic metal powder is coated by the nonmagnetic material, and a number of an opposing part P is n/2 or more, in which the opposing part P is a part where a length L is 10 μm or more, and the length L is a continuous length where a distance between particles of the soft magnetic metal powder is 400 nm or less, is provided. The soft magnetic metal dust core is superior in DC superimposing characteristic.

公开(公告)号：US20160225503A1

公开(公告)日：2016-08-04

申请号：US15008872

申请日：2016-01-28

Applicant: TDK CORPORATION

Inventor： Yusuke TANIGUCHI ,  Tomofumi KURODA ,  Yu SAKURAI

IPC: H01F3/08

CPC classification number: H01F3/08 ,  C22C19/03 ,  C22C30/00 ,  C22C38/002 ,  C22C38/08 ,  H01F1/14733 ,  H01F1/1475 ,  H01F1/14766 ,  H01F1/20 ,  H01F1/24

Abstract: The objective is to provide a soft magnetic metal powder-compact magnetic core and a reactor with an excellent DC superposition characteristic. The soft magnetic metal powder-compact magnetic core contains a soft magnetic metal powder, boron nitride and a silicon compound, when its section is ground and then observed, the ratio of the area occupied by the soft magnetic metal powder to that of the section of the soft magnetic metal powder-compact magnetic core is 90% or more and 95% or less, and a roundness of the section of 80% or more of the particles constituting the soft magnetic metal powder is 0.75 or more and 1.0 or less, and boron nitride exists in 70% or more of the voids-among-multiple-particles among the voids-among-multiple-particles in the section of the soft magnetic metal powder-compact magnetic core. Thus, the soft magnetic metal powder-compact magnetic core with an excellent DC superposition characteristic can be obtained.

Abstract translation: 目的是提供具有优异的DC叠加特性的软磁金属粉末紧凑型磁芯和反应器。 软磁性金属粉末 - 小型磁芯包含软磁性金属粉末，氮化硼和硅化合物，当其截面被研磨并观察时，软磁性金属粉末占该区域的面积的比例 软磁性金属粉末 - 小型磁芯的90％以上且95％以下，构成软磁性金属粉末的粒子的80％以上的截面的圆度为0.75以上且1.0以下， 在软磁性金属粉末 - 小型磁芯的截面中的多个颗粒之间的空隙中的多个颗粒之间的空隙的70％以上存在氮化硼。 因此，可以获得具有优异的DC叠加特性的软磁性金属粉末 - 小型磁芯。