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。

公开(公告)号：US20150332823A1

公开(公告)日：2015-11-19

申请号：US14712227

申请日：2015-05-14

Applicant: TDK CORPORATION

Inventor： Yu SAKURAI ,  Tomofumi KURODA ,  Hideyuki ITOH

IPC: H01F1/24 ,  H01F1/20 ,  C22C38/00 ,  H01F1/147

CPC classification number: H01F1/20 ,  B22F1/02 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/002 ,  H01F1/147 ,  H01F1/24 ,  H01F41/0246 ,  B22F9/08 ,  B22F1/0085 ,  B22F1/0081 ,  B22F1/0088 ,  B22F3/02 ,  B22F2003/248 ,  B22F2201/02 ,  B22F2009/043 ,  B22F2009/042

Abstract: The present invention relates to a soft magnetic metal powder having iron as the main component and containing boron, wherein, the content of iron inside the soft magnetic metal powder is 98 mass % or more, the content of boron in the particle of the soft magnetic metal powder is 10 to 150 ppm, and the metal particle has a film of boron nitride on the surface. The present invention also relates to a soft magnetic metal powder core prepared by using the soft magnetic metal powder.

Abstract translation: 本发明涉及一种以铁为主要成分并含有硼的软磁性金属粉末，其中，软磁性金属粉末中的铁含量为98质量％以上，软磁体粒子中的硼含量 金属粉末为10〜150ppm，金属粒子表面具有氮化硼膜。 本发明还涉及通过使用软磁性金属粉末制备的软磁性金属粉末芯。