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公开(公告)号：US10950374B2
公开(公告)日：2021-03-16
申请号：US16035302
申请日：2018-07-13
发明人： Hisato Koshiba , Takao Mizushima , Takafumi Hibino , Teruo Bitoh
摘要： Provided is an Fe-based alloy composition capable of forming an amorphous soft magnetic material which contains no P and which has a glass transition temperature Tg, the Fe-based alloy composition having a composition represented by the formula (Fe1−aTa)100at %−(x+b+c+d)MxBbCcSid, where T is an arbitrary added element such as Ni and M is an arbitrary added element such as Cr, the formula satisfying the following conditions: 0≤a≤0.3, 11.0 at %≤b≤18.20 at %, 6.00 at %≤c≤17 at %, 0 at %≤d≤10 at %, and 0 at %≤x≤4 at %.
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公开(公告)号：US12103081B2
公开(公告)日：2024-10-01
申请号：US17983270
申请日：2022-11-08
IPC分类号： H01F3/08 , B22F1/00 , B22F1/052 , B22F1/06 , B22F1/08 , B22F1/102 , B22F3/00 , B22F3/02 , C22C45/02 , H01F1/153 , H01F1/22 , H01F1/26 , H01F17/06 , H01F41/02
CPC分类号： B22F3/00 , B22F1/00 , B22F1/052 , B22F1/06 , B22F1/08 , B22F1/09 , B22F1/102 , B22F3/02 , C22C45/02 , H01F1/153 , H01F1/15375 , H01F1/22 , H01F1/26 , H01F3/08 , H01F17/06 , H01F41/0246 , B22F2999/00 , H01F17/062 , B22F2999/00 , B22F1/06 , C22C2200/02 , C22C2200/00 , C22C2202/02
摘要： A dust core contains a powder of a crystalline magnetic material powder and a powder of an amorphous magnetic material. The sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 83 mass percent or more. The mass ratio of the content of the crystalline magnetic material powder to the sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 20 mass percent or less. The median diameter D50a of the amorphous magnetic material powder is greater than or equal to the median diameter D50c of the crystalline magnetic material powder. A 10% cumulative diameter D10a in a volume-based cumulative particle size distribution of the amorphous magnetic material powder is 9.5 μm or less.
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公开(公告)号：US12037668B2
公开(公告)日：2024-07-16
申请号：US17379666
申请日：2021-07-19
发明人： Akio Hanada , Koichi Fujita , Seiichi Abiko , Hisato Koshiba
IPC分类号： C22C45/02 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/24 , H01F1/153 , H01F1/22 , H01F1/33 , H01F27/255 , H01F41/02
CPC分类号： C22C45/02 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/24 , H01F1/15308 , H01F1/22 , H01F1/33 , H01F27/255 , H01F41/0246 , B22F2003/248 , B22F2301/35 , B22F2998/10 , B22F2999/00 , B22F1/16 , C22C2200/02 , B22F2207/07
摘要： A powder magnetic core containing a magnetic particle of an Fe-based Cr-containing amorphous alloy and an organic binding substance is provided as a powder magnetic core with a small loss and high initial permeability. The depth profile of the composition determined from the surface of the magnetic particle in the powder magnetic core has the following characteristics. (1) An oxygen-containing region with an O/Fe ratio of 0.1 or more can be defined from the surface of the magnetic particle, and the oxygen-containing region has a depth of 35 nm or less from the surface. (2) A carbon-containing region with a C/O ratio of 1 or more can be defined from the surface of the magnetic particle, and the carbon-containing region has a depth of 5 nm or less from the surface. (3) The oxygen-containing region has a Cr-concentrated portion with a bulk Cr ratio of more than 1.
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公开(公告)号：US11529679B2
公开(公告)日：2022-12-20
申请号：US15712655
申请日：2017-09-22
IPC分类号： B22F1/052 , C22C45/02 , H01F1/153 , H01F3/08 , B22F3/02 , H01F41/02 , H01F1/26 , B22F1/102 , B22F1/08 , B22F1/00 , B22F3/00 , H01F1/22 , H01F17/06
摘要： A dust core contains a powder of a crystalline magnetic material powder and a powder of an amorphous magnetic material. The sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 83 mass percent or more. The mass ratio of the content of the crystalline magnetic material powder to the sum of the content of the crystalline magnetic material powder and the content of the amorphous magnetic material powder is 20 mass percent or less. The median diameter D50 of the amorphous magnetic material powder is greater than or equal to the median diameter D50 of the crystalline magnetic material powder.
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