JP6881617B2 - 磁心用の粉末、それを用いた磁心及びコイル部品、並びに磁心用の粉末の製造方法 - Google Patents
磁心用の粉末、それを用いた磁心及びコイル部品、並びに磁心用の粉末の製造方法 Download PDFInfo
- Publication number
- JP6881617B2 JP6881617B2 JP2019571770A JP2019571770A JP6881617B2 JP 6881617 B2 JP6881617 B2 JP 6881617B2 JP 2019571770 A JP2019571770 A JP 2019571770A JP 2019571770 A JP2019571770 A JP 2019571770A JP 6881617 B2 JP6881617 B2 JP 6881617B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic core
- particle size
- magnetic material
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/08—Metallic powder characterised by particles having an amorphous microstructure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2200/00—Crystalline structure
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/11—Magnetic recording head
- Y10T428/115—Magnetic layer composition
Description
M1:92Fe 3.5Si 4.5Cr(質量%)
[粉末の粒度]
レーザー回折散乱式粒度分布測定装置(堀場製作所製LA-920)により測定した。レーザー回折法により計測される体積基準の粒度分布から、小径側からの累積%が10体積%、50体積%及び90体積%となる粒子径であるd10、d50及びd90を得た。なおd10、d50及びd90について、粒状粉末A(A1及びA2)ではd10A、d50A及びd90Aとし、粒状粉末Bではd10B、d50B及びd90Bとし、粒状粉末A(A1及びA2)と粒状粉末Bの混合粉末ではd10M、d50M及びd90Mとして区別し表記する場合がある。
円環状の磁心の外形寸法と重量を計測し、得られた体積と重量から密度を算出した。
円環状の磁心を被測定物とし、導線を30ターン巻回してコイル部品とし、LCRメータ(アジレント・テクノロジー株式会社製4284A)により、室温(25℃)にて周波数100 kHzで測定したインダクタンスから次式により求めた。交流磁界を0.4 A/mとした条件で得られた値を初透磁率μiとした。
初透磁率μi=(le×L)/(μi0×Ae×N2)
(le:磁路長、L:試料のインダクタンス(H)、μi0:真空の透磁率=4π×10-7(H/m)、Ae:磁心の断面積、N:コイルの巻数)
初透磁率測定に用いたコイル部品を使って、直流印加装置(42841A:ヒューレットパッカード社製)で10 kA/mの直流磁界を印加した状態にて、LCRメータ(アジレント・テクノロジー株式会社社製4284A)によりインダクタンスLを周波数100 kHzで室温(25℃)にて測定した。得られたインダクタンスから前記初透磁率μiと同様の計算式にて得られた結果を増分透磁率μΔとした。得られた増分透磁率μΔと初透磁率μiから比μΔ/μi(%)を算出した。
Claims (10)
- Fe系結晶質金属磁性材料の粒状粉末Aと、Fe系非晶質金属磁性材料の粒状粉末Bとを含む磁心用の粉末であって、
前記Fe系結晶質金属磁性材料が、aFe bSi cCr dAl eC(ただし質量%で、a=100-b-c-d-e、0≦b≦12.0、0≦c≦8.0、0≦d<13.8、0≦e≦0.5を満たす)で表される組成を有し、
前記Fe系非晶質金属磁性材料が、Fe-Si-B系の非晶質金属磁性材料[ただし、その組成が、(Fe 1-x Crx) a (Si 1-y B y ) 100-a-b C b (ただしx及びyは原子比、a及びbは原子%を示し、それぞれ、0<x≦0.06、0.3≦y≦0.7、70≦a≦81、0<b≦2を満たす)で表される。]、及び/又はFe-P-C系の非晶質金属磁性材料[ただし、その組成が、Fe 100-x-y P x C y (ただし原子%で、6.8%≦x≦13.0%、2.2%≦y≦13.0%を満たす)で表される。]であり、
レーザー回折法によって求められる、粒子径と小粒子径側からの積算頻度との関係を示す積算分布曲線において、
前記粒状粉末Aの積算頻度50体積%に対応する粒子径d50Aが、0.5μm以上7.0μm以下であり、
前記粒状粉末Bの積算頻度50体積%に対応する粒子径d50Bが、15.0μm超35.0μm以下であり、
前記磁心用の粉末の積算頻度10体積%に対応する粒子径をd10Mとし、積算頻度50体積%に対応する粒子径をd50Mとし、積算頻度90体積%に対応する粒子径をd90Mとした場合に、(d90M-d10M)/d50Mが1.6以上6.0以下である、
磁心用の粉末。 - 請求項1に記載の磁心用の粉末であって、
前記d50Aが0.5μm以上6.1μm以下である、磁心用の粉末。 - 請求項1又は2に記載の磁心用の粉末であって、
前記d50Aが1.0μm以上5.0μm以下である、磁心用の粉末。 - 請求項1〜3のいずれかに記載の磁心用の粉末であって、
前記Fe系結晶質金属磁性材料が、純鉄、Fe-Si系、Fe-Si-Cr系、Fe-Si-Al系、及びFe-Cr-Al系からなる群から選ばれた少なくとも一種の結晶質磁性材料である、磁心用の粉末。 - 請求項1〜4のいずれかに記載の磁心用の粉末を用いた磁心。
- 請求項5に記載の磁心を用いたコイル部品。
- Fe系結晶質磁性材料からなり、レーザー回折法によって求められる、粒子径と小粒子径側からの積算頻度との関係を示す積算分布曲線において、積算頻度50体積%に対応する粒子径d50Aが0.5μm以上7.0μm以下である粒状粉末Aを準備する工程と、
Fe系非晶質金属磁性材料からなり、レーザー回折法によって求められる、粒子径と小粒子径側からの積算頻度との関係を示す積算分布曲線において、積算頻度50体積%に対応する粒子径d50Bが15.0μm超35.0μm以下である粒状粉末Bを準備する工程と、
前記粒状粉末Aと前記粒状粉末Bとを混合する混合工程と、を有し、
前記混合工程を経て得られた磁心用の粉末が、レーザー回折法によって求められる、粒子径と小粒子径側からの積算頻度との関係を示す積算分布曲線において、積算頻度10体積%に対応する粒子径をd10Mとし、積算頻度50体積%に対応する粒子径をd50Mとし、積算頻度90体積%に対応する粒子径をd90Mとした場合に、(d90M-d10M)/d50Mが1.6以上6.0以下であり、
前記Fe系結晶質金属磁性材料が、aFe bSi cCr dAl eC(ただし質量%で、a=100-b-c-d-e、0≦b≦12.0、0≦c≦8.0、0≦d<13.8、0≦e≦0.5を満たす)で表される組成を有し、
前記Fe系非晶質金属磁性材料が、Fe-Si-B系の非晶質金属磁性材料[ただし、その組成が、(Fe 1-x Crx) a (Si 1-y B y ) 100-a-b C b (ただしx及びyは原子比、a及びbは原子%を示し、それぞれ、0<x≦0.06、0.3≦y≦0.7、70≦a≦81、0<b≦2を満たす)で表される。]、及び/又はFe-P-C系の非晶質金属磁性材料[ただし、その組成が、Fe 100-x-y P x C y (ただし原子%で、6.8%≦x≦13.0%、2.2%≦y≦13.0%を満たす)で表される。]である、
磁心用の粉末の製造方法。 - 前記d50Aが0.5μm以上6.1μm以下である、請求項7に記載の磁心用の粉末の製造方法。
- 前記d50Aが1.0μm以上5.0μm以下である、請求項7に記載の磁心用の粉末の製造方法。
- 前記Fe系結晶質金属磁性材料が、純鉄、Fe-Si系、Fe-Si-Cr系、Fe-Si-Al系、及びFe-Cr-Al系からなる群から選ばれた少なくとも一種の結晶質磁性材料である、請求項7〜9のいずれかに記載の磁心用の粉末の製造方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018156415 | 2018-08-23 | ||
JP2018156415 | 2018-08-23 | ||
PCT/JP2019/032807 WO2020040250A1 (ja) | 2018-08-23 | 2019-08-22 | 磁心用の粉末、それを用いた磁心及びコイル部品、並びに磁心用の粉末の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2020040250A1 JPWO2020040250A1 (ja) | 2021-02-25 |
JP6881617B2 true JP6881617B2 (ja) | 2021-06-02 |
Family
ID=69592569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019571770A Active JP6881617B2 (ja) | 2018-08-23 | 2019-08-22 | 磁心用の粉末、それを用いた磁心及びコイル部品、並びに磁心用の粉末の製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210313111A1 (ja) |
EP (1) | EP3842168A1 (ja) |
JP (1) | JP6881617B2 (ja) |
CN (1) | CN112566741B (ja) |
WO (1) | WO2020040250A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7464587B2 (ja) * | 2019-10-04 | 2024-04-09 | 住友ベークライト株式会社 | 樹脂組成物および成形品 |
JP2021158316A (ja) * | 2020-03-30 | 2021-10-07 | 味の素株式会社 | 磁性組成物 |
EP4180149A4 (en) * | 2020-07-10 | 2023-12-06 | JFE Mineral Company, Ltd. | METAL POWDER AND PRESSED POWDER BODY THEREOF AND PRODUCTION PROCESS THEREOF |
CN112469257A (zh) * | 2020-10-14 | 2021-03-09 | 北京航空航天大学 | 一种低噪声和高屏蔽系数的铁基非晶材料电磁屏蔽桶 |
WO2022186222A1 (ja) * | 2021-03-05 | 2022-09-09 | パナソニックIpマネジメント株式会社 | 磁性材料、圧粉磁心、インダクタおよび圧粉磁心の製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001196216A (ja) * | 2000-01-17 | 2001-07-19 | Hitachi Ferrite Electronics Ltd | 圧粉磁芯 |
JP2007134381A (ja) | 2005-11-08 | 2007-05-31 | Nec Tokin Corp | 複合磁性材料、それを用いた圧粉磁心および磁性素子 |
JP5288405B2 (ja) | 2008-11-13 | 2013-09-11 | Necトーキン株式会社 | インダクタおよびインダクタの製造方法 |
JPWO2014054093A1 (ja) * | 2012-10-01 | 2016-08-25 | 株式会社日立製作所 | 圧粉磁心およびその製造方法 |
WO2014058057A2 (ja) * | 2012-10-12 | 2014-04-17 | 丸尾カルシウム株式会社 | 樹脂用炭酸カルシウム填料及び該填料を含む樹脂組成物 |
JP6178575B2 (ja) | 2013-01-15 | 2017-08-09 | ハード工業有限会社 | 金属粉末の製造装置および金属粉末の製造方法 |
EP3300089B1 (en) * | 2015-05-19 | 2020-05-06 | Alps Alpine Co., Ltd. | Dust core, method for producing said dust core, inductor provided with said dust core, and electronic/electrical device on which said inductor is mounted |
JP6459154B2 (ja) * | 2015-06-19 | 2019-01-30 | 株式会社村田製作所 | 磁性体粉末とその製造方法、磁心コアとその製造方法、及びコイル部品 |
JP2017108098A (ja) | 2015-11-26 | 2017-06-15 | アルプス電気株式会社 | 圧粉コア、当該圧粉コアの製造方法、該圧粉コアを備えるインダクタ、および該インダクタが実装された電子・電気機器 |
JP6926419B2 (ja) * | 2016-09-02 | 2021-08-25 | Tdk株式会社 | 圧粉磁心 |
-
2019
- 2019-08-22 JP JP2019571770A patent/JP6881617B2/ja active Active
- 2019-08-22 EP EP19852858.0A patent/EP3842168A1/en active Pending
- 2019-08-22 CN CN201980052525.0A patent/CN112566741B/zh active Active
- 2019-08-22 WO PCT/JP2019/032807 patent/WO2020040250A1/ja unknown
- 2019-08-22 US US17/266,281 patent/US20210313111A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN112566741B (zh) | 2023-06-02 |
US20210313111A1 (en) | 2021-10-07 |
EP3842168A4 (en) | 2021-06-30 |
EP3842168A1 (en) | 2021-06-30 |
JPWO2020040250A1 (ja) | 2021-02-25 |
CN112566741A (zh) | 2021-03-26 |
WO2020040250A1 (ja) | 2020-02-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6881617B2 (ja) | 磁心用の粉末、それを用いた磁心及びコイル部品、並びに磁心用の粉末の製造方法 | |
KR102259446B1 (ko) | 연자성 분말, Fe 기 나노 결정 합금 분말, 자성 부품 및 압분 자심 | |
WO2018150952A1 (ja) | 軟磁性粉末、圧粉磁芯、磁性部品及び圧粉磁芯の製造方法 | |
KR101503199B1 (ko) | Fe 기 비정질 합금 분말 및 상기 Fe 기 비정질 합금 분말을 사용한 압분 코어, 그리고 코일 봉입 압분 코어 | |
TWI644330B (zh) | 磁心、線圈部件及磁心的製造方法 | |
KR20130111357A (ko) | 연자성 분말, 압분 자심 및 자성 소자 | |
WO2014136148A1 (en) | Powder made of iron-based metallic glass | |
US11817245B2 (en) | Soft magnetic powder | |
JP6673536B1 (ja) | 磁心用粉末、それを用いた磁心及びコイル部品 | |
KR20160132840A (ko) | 자심, 코일 부품 및 자심의 제조 방법 | |
JP6937386B2 (ja) | Fe基軟磁性合金 | |
JP2016014162A (ja) | 非晶質合金粉末、圧粉磁心、磁性素子および電子機器 | |
JPWO2016121950A1 (ja) | 磁性体粉末とその製造方法、及び磁心コアとその製造方法、並びにコイル部品、及びモータ | |
JPWO2016121951A1 (ja) | 磁性体粉末とその製造方法、及び磁心コアとその製造方法、並びにコイル部品、及びモータ | |
KR102020666B1 (ko) | 자심 및 코일 부품 | |
JP6164512B2 (ja) | Fe基軟磁性金属粉体 | |
US20230212722A1 (en) | Alloy particles | |
JP2023032113A (ja) | 合金粒子 | |
JP6693603B1 (ja) | 磁心用の粉末、それを用いた磁心及びコイル部品 | |
JP2022121260A (ja) | 軟磁性粉末、圧粉磁心、磁性素子および電子機器 | |
JP2023032115A (ja) | 合金粒子 | |
JP2023032112A (ja) | 合金粒子 | |
JP2021086941A (ja) | Fe基軟磁性合金、薄帯、粉末、磁心、及びコイル部品 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20201013 |
|
A871 | Explanation of circumstances concerning accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A871 Effective date: 20201013 |
|
A975 | Report on accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A971005 Effective date: 20201215 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20201222 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20210215 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210406 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20210419 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6881617 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |