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1. WO2018155608 - MAGNETIC MATERIAL AND PROCESS FOR MANUFACTURING SAME

Publication Number WO/2018/155608
Publication Date 30.08.2018
International Application No. PCT/JP2018/006615
International Filing Date 23.02.2018
Chapter 2 Demand Filed 02.10.2018
IPC
H01F 1/147 2006.1
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
147Alloys characterised by their composition
C21D 6/00 2006.1
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
6Heat treatment of ferrous alloys
C22C 38/00 2006.1
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
CPC
B22F 1/054
B22F 1/142
B22F 1/145
B22F 2003/248
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
3Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; ; Presses and furnaces
24After-treatment of workpieces or articles
248Thermal after-treatment
B22F 2304/054
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2304Physical aspects of the powder
05Submicron size particles
054Particle size between 1 and 100 nm
B22F 2999/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2999Aspects linked to processes or compositions used in powder metallurgy
Applicants
  • 国立研究開発法人産業技術総合研究所 NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY [JP]/[JP]
Inventors
  • 山本 真平 YAMAMOTO Shinpei
  • 今岡 伸嘉 IMAOKA Nobuyoshi
  • 尾崎 公洋 OZAKI Kimihiro
Agents
  • 特許業務法人浅村特許事務所 ASAMURA PATENT OFFICE, P.C.
Priority Data
2017-03332724.02.2017JP
2017-22215717.11.2017JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) MAGNETIC MATERIAL AND PROCESS FOR MANUFACTURING SAME
(FR) MATÉRIAU MAGNÉTIQUE ET SON PROCESSUS DE FABRICATION
(JA) 磁性材料とその製造法
Abstract
(EN) Provided are a new, highly magnetically stable magnetic material which has higher saturation magnetization than ferrite-based magnetic materials, and with which problems of eddy current loss and the like can be solved due to higher electric resistivity than that of existing metal-based magnetic materials, and a method for manufacturing the same. A magnetic material powder is obtained by reducing in hydrogen Ni-ferrite nanoparticles obtained by wet synthesis and causing grain growth, while simultaneously causing nanodispersion of an α-(Fe, Ni) phase and an Ni-enriched phase by means of a phase dissociation phenomenon due to disproportional reaction. The powder is sintered to obtain a solid magnetic material.
(FR) La présente invention concerne un nouveau matériau magnétique à haute stabilité magnétique qui présente une magnétisation de saturation supérieure à celle des matériaux magnétiques à base de ferrite, et avec lesquels des problèmes de perte de courant de Foucault et similaires peuvent être résolus en raison d'une résistivité électrique supérieure à celle de matériaux magnétiques à base de métal existants, et son procédé de fabrication. Une poudre de matériau magnétique est obtenue par réduction de nanoparticules de ferrite de Ni d'hydrogène obtenues par synthèse humide et provoquant une croissance de grain, tout en provoquant simultanément une nanodispersion d'une phase α-(Fe, Ni) et d'une phase enrichie en Ni au moyen d'un phénomène de dissociation de phase dû à une réaction disproportionnée. La poudre est frittée pour obtenir un matériau magnétique solide.
(JA) フェライト系磁性材料よりも高い飽和磁化を有し、既存の金属系磁性材料よりも電気抵抗率が高いために渦電流損失などの問題点を解決する、磁気安定性の高い新しい磁性材料とその製造方法を提供する。 湿式合成で得たNi-フェライトナノ粒子を水素中で還元して、粒成長させると同時に、不均化反応による相分離現象を利用してα-(Fe,Ni)相とNi富化相をナノ分散させた磁性材料粉体とする。さらに、この粉体を焼結して固形磁性材料とする。
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