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1. WO2020195842 - COMPRESSED POWDER MAGNETIC CORE

Publication Number WO/2020/195842
Publication Date 01.10.2020
International Application No. PCT/JP2020/010572
International Filing Date 11.03.2020
IPC
B22F 1/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
B22F 1/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
02comprising coating of the powder
B22F 3/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
H01F 1/24 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
12of soft-magnetic materials
14metals or alloys
20in the form of particles, e.g. powder
22pressed, sintered, or bound together
24the particles being insulated
Applicants
  • 日本特殊陶業株式会社 NGK SPARK PLUG CO., LTD. [JP]/[JP]
Inventors
  • 渡邊 洋史 WATANABE Hiroshi
  • 森 智史 MORI Satoshi
  • 齋藤 愛実 SAITO Manami
  • ▲高▼岡 勝哉 TAKAOKA Katsuya
  • 竹内 裕貴 TAKEUCHI Hiroki
  • 小塚 久司 KOZUKA Hisashi
Agents
  • 特許業務法人グランダム特許事務所 GRANDOM PATENT LAW FIRM
Priority Data
2019-05418322.03.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) COMPRESSED POWDER MAGNETIC CORE
(FR) NOYAU MAGNÉTIQUE EN POUDRE COMPRIMÉE
(JA) 圧粉磁心
Abstract
(EN)
The purpose of the present invention is to suppress iron loss in a compressed powder magnetic core. A compressed powder magnetic core (1) comprises soft magnetic metal particles (3) having an average particle diameter of 5-30 μm and a grain boundary phase (6). The grain boundary phase (6) is configured to include a polycrystal compound containing Al (aluminum). When the cross-sectional configuration of the compressed powder magnetic core (1) is observed, the area ratio of α-Al2O3 to the grain boundary phase (6) is no more than 75%. The average thickness Ta of the grain boundary phase (6) is 10-300 nm. The present invention suppresses iron loss.
(FR)
L'objet de la présente invention est de supprimer les pertes dans le fer dans un noyau magnétique en poudre comprimée. Un noyau magnétique en poudre comprimée (1) comprend des particules de métal magnétique doux (3) ayant un diamètre de particule moyen de 5 à 30 µm et une phase limite de grain (6). La phase limite de grain (6) est configurée pour contenir un composé polycristallin contenant de l'aluminium (Al). Lorsque la configuration en coupe transversale du noyau magnétique en poudre comprimée (1) est observée, le rapport de surface entre α-Al2O3 et la phase limite de grain (6) n'est pas supérieur à 75 %. L'épaisseur moyenne Ta de la phase limite de grain (6) est de 10 à 300 nm. La présente invention permet de supprimer les pertes dans le fer.
(JA)
圧粉磁心の鉄損を抑制する。圧粉磁心(1)は、平均粒子径5μm以上30μm以下の軟磁性金属粒子(3)と、粒界相(6)と、を備えてなる。粒界相(6)は、Al(アルミニウム)を含有する多結晶化合物を含んで構成されている。そして、圧粉磁心(1)の断面構造を観察した際に、α-Alが粒界相(6)を占める面積割合は75%以下である。また、粒界相(6)の平均厚みTaは、10nm以上300nm以下である。本発明によれば、鉄損が抑制される。
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