JP5417632B2 - 永久磁石及び永久磁石の製造方法 - Google Patents
永久磁石及び永久磁石の製造方法 Download PDFInfo
- Publication number
- JP5417632B2 JP5417632B2 JP2008069383A JP2008069383A JP5417632B2 JP 5417632 B2 JP5417632 B2 JP 5417632B2 JP 2008069383 A JP2008069383 A JP 2008069383A JP 2008069383 A JP2008069383 A JP 2008069383A JP 5417632 B2 JP5417632 B2 JP 5417632B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- compound
- permanent magnet
- raw material
- sintering
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0572—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0551—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0552—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 in the form of particles, e.g. rapid quenched powders or ribbon flakes with a protective layer
-
- 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
- H01F41/0253—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 for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
-
- 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
- H01F41/0253—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 for manufacturing permanent magnets
- H01F41/0293—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 for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
-
- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/04—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 hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- 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
- H01F41/14—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 applying magnetic films to substrates
- H01F41/16—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 applying magnetic films to substrates the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Powder Metallurgy (AREA)
Description
そして、上記VCMにおいて小型化、薄型化を実現するに当たって、VCMに埋設される永久磁石について、薄膜化と更なる磁気特性の向上が求められている。尚、永久磁石としてはフェライト磁石、Sm−Co系磁石、Nd−Fe−B系磁石、Sm2Fe17Nx系磁石等があるが、特に保磁力の高いNd−Fe−B系磁石が永久磁石モータ用の永久磁石として用いられる。
また、上記のように添加したDyが磁石粒子内に固溶化すると、磁石の残留磁化が低下する原因となっていた。
そこで、微量のDyによって残留磁化を低下させることなく磁石の保磁力を大きく向上させる技術が望まれていた。
先ず、図1〜図4を用いて永久磁石1の構成について説明する。尚、本実施形態では特にVCMに埋設される永久磁石1を例に挙げて説明する。
本実施形態に係る永久磁石1はNd−Fe−B系磁石である。また、永久磁石1の保磁力を高める為のDy(ジスプロシウム)が添加されている。尚、各成分の含有量はNd:27〜30wt%、Dy(又はTb):0.01〜8wt%、B:1〜2wt%、Fe(電解鉄):60〜70wt%とする。また、永久磁石1は、図1に示すように扇形で且つ薄膜状の磁石から構成される。図1は本実施形態に係る永久磁石1を示した全体図である。
図3に示すように永久磁石の保磁力は、磁化された状態から逆方向への磁場を加えていった際に、磁気分極を0にする(即ち、磁化反転する)のに必要な磁場の強さである。従って、磁化反転を抑制することができれば、高い保磁力を得ることができる。尚、磁性体の磁化過程には、磁気モーメントの回転に基づく回転磁化と、磁区の境界である磁壁(90°磁壁と180°磁壁からなる)が移動する磁壁移動がある。
また、本実施形態ではDy化合物を磁石原料と共に溶媒中で湿式混合したグリーンシートを適切な焼成条件で焼成すれば、Dyが磁石粒子35内へと拡散浸透(固溶化)することを防止できる。ここで、Dyが磁石粒子35内へと拡散浸透すると、その磁石の残留磁化(磁場の強さを0にしたときの磁化)が低下することが知られている。従って、本実施形態では、永久磁石1の残留磁化が低下することを防止できる。
尚、Dy層36はDy化合物のみから構成される層である必要はなく、DyとNdとの混合体からなる層であっても良い。また、Dy化合物の替わりにTb(テルビウム)化合物を添加することによっても、同様に永久磁石1の保磁力を向上させることが可能である。Tbが添加された場合には、Nd磁石粒子35の表面にTb化合物の層が同様に形成される。そして、Tb層を形成することにより、永久磁石1の保磁力を更に向上させることができる。
次に、本実施形態に係る永久磁石1の製造方法について図5を用いて説明する。図8は本実施形態に係る永久磁石1の製造工程を示した説明図である。
・分散装置:ビーズミル
・分散メディア:ジルコニアビーズ
また、溶媒に非可溶でも、微粒子に粉砕したDy、又はDy化合物を湿式分散時に添加し、均一分散する事でNd磁石粒子表面に均一付着させることが可能となる。
・塗工方式:ドクターブレード
・ギャップ:1mm
・支持基材:シリコーン処理ポリエステルフィルム
・乾燥条件:90℃×10分の後、130℃×30分
更に、上記グリーンシート42を適切な焼成条件で焼成すれば、Dyが磁石粒子内に固溶化することを防止できる。従って、磁石の残留磁化が低下することを防止できる。
また、特に高保磁力を確保することができるNd系磁石に対して、微量のDyの添加によって更なる保磁力の向上を図ることが可能となる。
更に、磁石粉末中に含まれるDyの含有量を0.01〜8wt%とするので、従来のDyの添加量の1/3未満の添加量であっても、Dyによる磁石の保磁力の向上を十分に図ることが可能となる。
例えば、本実施形態では磁石粉末やDy化合物を溶媒中に分散させる方法として、図5に示すように粗粉砕した磁石粉末をDy化合物とともに溶媒中で湿式粉砕することにより溶媒中で分散させているが、以下の方法により行うことも可能である。
(1)先ず、粗粉砕した磁石粉末をボールミルやジェットミル等を用いて乾式粉砕により0.3〜5μm程度の大きさに微粉砕する。
(2)次に、微粉砕した磁石粉末を溶媒に添加し、溶媒中に均一に分散させる。その際、分散剤やDy化合物についても溶媒中に添加する。
(3)溶媒中に分散された磁石粉末と樹脂バインダーを混練し、スラリー41を生成する。
以降は、本実施形態と同様の処理を行うことにより、本実施形態と同様の構成を備えた永久磁石を製造することが可能となる。
41 スラリー
42 グリーンシート
Claims (3)
- Nd−Fe−B系磁石の磁石原料を有機溶媒中で湿式粉砕するとともに、湿式粉砕が行われている前記有機溶媒に対して、該有機溶媒に可溶なDy化合物又はTb化合物を添加することによって、粉砕された前記磁石原料の表面に前記Dy化合物又はTb化合物を被覆し、この磁石原料と樹脂バインダーとを混合、成形したグリーンシートを焼結してなることを特徴とする永久磁石。
- 前記Dy化合物又はTb化合物が、焼結後に前記磁石原料の粒界に偏在していることを特徴とする請求項1に記載の永久磁石。
- Nd−Fe−B系磁石の磁石原料を有機溶媒中で湿式粉砕するとともに、湿式粉砕が行われている前記有機溶媒に対して、該有機溶媒に可溶なDy化合物又はTb化合物を添加することによって、粉砕された前記磁石原料の表面に前記Dy化合物又はTb化合物を被覆する工程と、
前記Dy化合物又はTb化合物が被覆された磁石原料に樹脂バインダーを添加する工程と、
前記磁石原料と前記樹脂バインダーとを混練することによりスラリーを生成する工程と、
前記スラリーをシート状に成形し、グリーンシートを作製する工程と、
前記グリーンシートを焼結する工程と、を有することを特徴とする永久磁石の製造方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008069383A JP5417632B2 (ja) | 2008-03-18 | 2008-03-18 | 永久磁石及び永久磁石の製造方法 |
US12/933,180 US9275778B2 (en) | 2008-03-18 | 2009-03-17 | Permanent magnet and method for manufacturing the same |
KR1020107020904A KR20100125334A (ko) | 2008-03-18 | 2009-03-17 | 영구 자석 및 영구 자석의 제조 방법 |
EP09722755A EP2254129A4 (en) | 2008-03-18 | 2009-03-17 | PERMANENT MAGNET AND METHOD FOR PRODUCING THE SAME |
CN2009801096403A CN101978441A (zh) | 2008-03-18 | 2009-03-17 | 永久磁铁及永久磁铁的制造方法 |
PCT/JP2009/055168 WO2009116532A1 (ja) | 2008-03-18 | 2009-03-17 | 永久磁石及び永久磁石の製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008069383A JP5417632B2 (ja) | 2008-03-18 | 2008-03-18 | 永久磁石及び永久磁石の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009224671A JP2009224671A (ja) | 2009-10-01 |
JP5417632B2 true JP5417632B2 (ja) | 2014-02-19 |
Family
ID=41090933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008069383A Expired - Fee Related JP5417632B2 (ja) | 2008-03-18 | 2008-03-18 | 永久磁石及び永久磁石の製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9275778B2 (ja) |
EP (1) | EP2254129A4 (ja) |
JP (1) | JP5417632B2 (ja) |
KR (1) | KR20100125334A (ja) |
CN (1) | CN101978441A (ja) |
WO (1) | WO2009116532A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044093B4 (de) * | 2006-09-20 | 2009-01-22 | Airbus Deutschland Gmbh | Scheibenersatz zum Ausfüllen eines Fensterrahmens |
JP5417632B2 (ja) | 2008-03-18 | 2014-02-19 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP4872109B2 (ja) * | 2008-03-18 | 2012-02-08 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP5261747B2 (ja) * | 2008-04-15 | 2013-08-14 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
US8500921B2 (en) | 2010-03-31 | 2013-08-06 | Nitto Denko Corporation | Permanent magnet and manufacturing method thereof |
EP2506274B1 (en) | 2010-03-31 | 2014-07-02 | Nitto Denko Corporation | Manufacturing method for permanent magnet |
WO2011125588A1 (ja) * | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP4923152B2 (ja) * | 2010-03-31 | 2012-04-25 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
EP2503567B1 (en) | 2010-03-31 | 2014-07-02 | Nitto Denko Corporation | Manufacturing method for permanent magnet |
CN102549685B (zh) * | 2010-03-31 | 2014-04-02 | 日东电工株式会社 | 永久磁铁及永久磁铁的制造方法 |
KR101192487B1 (ko) * | 2010-03-31 | 2012-10-17 | 닛토덴코 가부시키가이샤 | 영구 자석 및 영구 자석의 제조 방법 |
WO2011125582A1 (ja) * | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
US9272332B2 (en) | 2011-09-29 | 2016-03-01 | GM Global Technology Operations LLC | Near net shape manufacturing of rare earth permanent magnets |
US9468972B2 (en) * | 2011-09-30 | 2016-10-18 | Gm Global Technology Operations, Llc | Method of making Nd—Fe—B sintered magnets with reduced dysprosium or terbium |
JP5908247B2 (ja) * | 2011-09-30 | 2016-04-26 | 日東電工株式会社 | 永久磁石の製造方法 |
US20150028976A1 (en) | 2012-03-26 | 2015-01-29 | Hitachi, Ltd. | Rare-Earth Magnet |
CA2937663C (fr) | 2014-02-19 | 2020-09-01 | Hutchinson | Procede de preparation d'une composition d'electrode ou a proprietes magnetiques, melange et composition obtenus par ce procede et cette electrode. |
KR102254601B1 (ko) * | 2014-10-24 | 2021-05-21 | 한국전자통신연구원 | 멀티홉 릴레이 선박 통신 장치 |
CN105931833B (zh) * | 2016-04-20 | 2017-11-17 | 北京科技大学 | 一种高取向度烧结钕铁硼永磁材料的制备方法 |
Family Cites Families (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4762574A (en) * | 1985-06-14 | 1988-08-09 | Union Oil Company Of California | Rare earth-iron-boron premanent magnets |
CA2014974A1 (en) * | 1989-03-18 | 1991-10-19 | Ken Ikuma | Dies for extrusion moulding |
JPH03214608A (ja) * | 1990-01-19 | 1991-09-19 | Fuji Elelctrochem Co Ltd | ボンド磁石の製造方法 |
JP3323561B2 (ja) * | 1992-11-20 | 2002-09-09 | 住友特殊金属株式会社 | ボンド磁石用合金粉末の製造方法 |
JP3298219B2 (ja) | 1993-03-17 | 2002-07-02 | 日立金属株式会社 | 希土類―Fe−Co−Al−V−Ga−B系焼結磁石 |
JPH0786015A (ja) * | 1993-06-30 | 1995-03-31 | Isuzu Motors Ltd | 機械的強度の大きい永久磁石及びその製造方法 |
JPH088111A (ja) * | 1994-06-23 | 1996-01-12 | Murata Mfg Co Ltd | 異方性永久磁石及びその製造方法 |
JP3865180B2 (ja) * | 1998-09-18 | 2007-01-10 | 愛知製鋼株式会社 | 耐熱希土類合金異方性磁石粉末 |
JP2001020065A (ja) | 1999-07-07 | 2001-01-23 | Hitachi Metals Ltd | スパッタリング用ターゲット及びその製造方法ならびに高融点金属粉末材料 |
US6856231B2 (en) * | 2000-09-08 | 2005-02-15 | Nec Tokin Corporaton | Magnetically biasing bond magnet for improving DC superposition characteristics of magnetic coil |
EP1211700A3 (en) * | 2000-11-30 | 2003-10-15 | NEC TOKIN Corporation | Magnetic core including magnet for magnetic bias and inductor component using the same |
JP3974773B2 (ja) * | 2000-11-30 | 2007-09-12 | Necトーキン株式会社 | 磁気バイアス用磁石を有する磁気コアおよびそれを用いたインダクタンス部品 |
US7244318B2 (en) | 2001-01-30 | 2007-07-17 | Neomax Co., Ltd. | Method for preparation of permanent magnet |
JP2003282312A (ja) * | 2002-03-22 | 2003-10-03 | Inter Metallics Kk | 着磁性が改善されたR−Fe−(B,C)系焼結磁石およびその製造方法 |
JP2004281873A (ja) * | 2003-03-18 | 2004-10-07 | Hitachi Metals Ltd | 希土類磁石の製造方法 |
JP4374962B2 (ja) | 2003-03-28 | 2009-12-02 | 日産自動車株式会社 | 希土類磁石およびその製造方法、ならびに希土類磁石を用いてなるモータ |
US7618497B2 (en) | 2003-06-30 | 2009-11-17 | Tdk Corporation | R-T-B based rare earth permanent magnet and method for production thereof |
JP2005039089A (ja) | 2003-07-16 | 2005-02-10 | Neomax Co Ltd | 微粒子を用いるナノ結晶磁石の製造方法 |
JP2005097697A (ja) | 2003-09-26 | 2005-04-14 | Toshiba Corp | スパッタリングターゲットとその製造方法 |
JP4525072B2 (ja) * | 2003-12-22 | 2010-08-18 | 日産自動車株式会社 | 希土類磁石およびその製造方法 |
JP4234581B2 (ja) * | 2003-12-25 | 2009-03-04 | 株式会社日立製作所 | 希土類磁石とその製造方法およびモータ |
JP2005191187A (ja) | 2003-12-25 | 2005-07-14 | Nissan Motor Co Ltd | 希土類磁石およびその製造方法 |
JP2005197299A (ja) | 2003-12-26 | 2005-07-21 | Tdk Corp | 希土類焼結磁石及びその製造方法 |
JP2006286819A (ja) | 2005-03-31 | 2006-10-19 | Tdk Corp | 希土類焼結磁石及びそれを用いたvcm装置 |
JP2007191787A (ja) * | 2005-12-19 | 2007-08-02 | Nissan Motor Co Ltd | 高温加圧成型用金型、磁石製造方法及び磁石 |
JP4415980B2 (ja) * | 2006-08-30 | 2010-02-17 | 株式会社日立製作所 | 高抵抗磁石およびそれを用いたモータ |
JP4872109B2 (ja) * | 2008-03-18 | 2012-02-08 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP5417632B2 (ja) | 2008-03-18 | 2014-02-19 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP5261747B2 (ja) | 2008-04-15 | 2013-08-14 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
JP4923152B2 (ja) | 2010-03-31 | 2012-04-25 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
EP2503567B1 (en) | 2010-03-31 | 2014-07-02 | Nitto Denko Corporation | Manufacturing method for permanent magnet |
WO2011125588A1 (ja) | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
WO2011125582A1 (ja) | 2010-03-31 | 2011-10-13 | 日東電工株式会社 | 永久磁石及び永久磁石の製造方法 |
KR101192487B1 (ko) | 2010-03-31 | 2012-10-17 | 닛토덴코 가부시키가이샤 | 영구 자석 및 영구 자석의 제조 방법 |
CN102549685B (zh) * | 2010-03-31 | 2014-04-02 | 日东电工株式会社 | 永久磁铁及永久磁铁的制造方法 |
-
2008
- 2008-03-18 JP JP2008069383A patent/JP5417632B2/ja not_active Expired - Fee Related
-
2009
- 2009-03-17 CN CN2009801096403A patent/CN101978441A/zh active Pending
- 2009-03-17 US US12/933,180 patent/US9275778B2/en not_active Expired - Fee Related
- 2009-03-17 WO PCT/JP2009/055168 patent/WO2009116532A1/ja active Application Filing
- 2009-03-17 KR KR1020107020904A patent/KR20100125334A/ko not_active Application Discontinuation
- 2009-03-17 EP EP09722755A patent/EP2254129A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CN101978441A (zh) | 2011-02-16 |
US9275778B2 (en) | 2016-03-01 |
EP2254129A1 (en) | 2010-11-24 |
JP2009224671A (ja) | 2009-10-01 |
EP2254129A4 (en) | 2011-07-06 |
US20110018664A1 (en) | 2011-01-27 |
WO2009116532A1 (ja) | 2009-09-24 |
KR20100125334A (ko) | 2010-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5417632B2 (ja) | 永久磁石及び永久磁石の製造方法 | |
JP4872109B2 (ja) | 永久磁石及び永久磁石の製造方法 | |
JP5266522B2 (ja) | 永久磁石及び永久磁石の製造方法 | |
WO2009116540A1 (ja) | モータ用永久磁石及びモータ用永久磁石の製造方法 | |
JP5261747B2 (ja) | 永久磁石及び永久磁石の製造方法 | |
JP5298180B2 (ja) | モータ用永久磁石及びモータ用永久磁石の製造方法 | |
WO2011125593A1 (ja) | 永久磁石及び永久磁石の製造方法 | |
JP2012004576A (ja) | 永久磁石及び永久磁石の製造方法 | |
JP4203646B2 (ja) | 可撓性ハイブリッド型希土類ボンド磁石の製造方法、磁石およびモ−タ | |
JP2015207687A (ja) | 永久磁石及び永久磁石の製造方法 | |
JP5878325B2 (ja) | 永久磁石の製造方法 | |
JP2000182815A (ja) | 異方性ボンド磁石粉末の製造方法及び異方性ボンド磁石粉末並びに異方性ボンド磁石 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20101122 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130226 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130416 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130903 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130930 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20131022 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20131030 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |