JPH10106875A - Manufacturing method of rare-earth magnet - Google Patents
Manufacturing method of rare-earth magnetInfo
- Publication number
- JPH10106875A JPH10106875A JP8280389A JP28038996A JPH10106875A JP H10106875 A JPH10106875 A JP H10106875A JP 8280389 A JP8280389 A JP 8280389A JP 28038996 A JP28038996 A JP 28038996A JP H10106875 A JPH10106875 A JP H10106875A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- magnetic field
- rare
- pressing
- 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.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 20
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000006247 magnetic powder Substances 0.000 claims abstract description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052733 gallium Inorganic materials 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 21
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract description 2
- 238000000265 homogenisation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229910000521 B alloy Inorganic materials 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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
- H01F1/0573—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 obtained by reduction or by hydrogen decrepitation or embrittlement
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、希土類磁石の製造
方法に係わり、特に、希土類焼結磁石の磁気特性の向上
に関するもので、磁気特性を向上させ、高特性の磁石を
得る希土類磁石の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rare earth magnet, and more particularly to an improvement in the magnetic properties of a rare earth sintered magnet. It is about the method.
【０００２】[0002]
【従来の技術】永久磁石材料は、各種電気製品から小型
精密機器、各種アクチュエーターまで広い分野で使用さ
れており、重要な電気、電子材料の一つに挙げられる。2. Description of the Related Art Permanent magnet materials are used in a wide range of fields from various electric products to small precision instruments and various actuators, and are one of important electric and electronic materials.
【０００３】近年、機器の小型化、高効率化の要求から
高性能な永久磁石が求められており、これらの要求を満
たす高性能希土類磁石の需要も、ここ数年、急速に延び
ている。In recent years, high-performance permanent magnets have been demanded in order to reduce the size and efficiency of equipment, and the demand for high-performance rare-earth magnets meeting these demands has been rapidly increasing in recent years.
【０００４】Ｒ−Ｔ−Ｂ系焼結磁石は、磁気エネルギー
が高いことで知られている。従来のＲ−Ｔ−Ｂ系焼結磁
石は、インゴットを均質化のための熱処理した後、粗粉
砕、微粉砕、磁場プレス、焼結して作製される。[0004] RTB-based sintered magnets are known for their high magnetic energy. A conventional RTB-based sintered magnet is manufactured by subjecting an ingot to heat treatment for homogenization, followed by coarse pulverization, fine pulverization, magnetic field pressing, and sintering.
【０００５】[0005]
【発明が解決しようとする課題】一般に磁性粉は、磁気
的凝集のために、閉磁路ネットワーク構造を形成する。
磁性粉の凝集は、希土類磁石では、配向度、粉末充填性
などに影響し、磁気特性を低下させる原因となってい
る。Generally, magnetic powder forms a closed magnetic circuit network structure due to magnetic aggregation.
Aggregation of the magnetic powder affects the degree of orientation, powder filling, and the like of the rare-earth magnet, and is a cause of lowering the magnetic properties.
【０００６】具体的には、従来の希土類磁石に用いる磁
性粉は、高いエネルギー積を得るために、高保磁力で、
かつ高磁化を有する。また、高いエネルギー積を得るた
めに、プレス工程の際、強磁場を印加し、粉末を配向さ
せる。Specifically, the magnetic powder used for the conventional rare earth magnet has a high coercive force in order to obtain a high energy product.
And it has high magnetization. Also, in order to obtain a high energy product, a strong magnetic field is applied during the pressing step to orient the powder.
【０００７】しかし、磁性粉の磁気的相互作用は、飽和
磁化の増加と共に増加する。従来、希土類磁石に用いる
磁性粉末は、磁気的相互作用が大きく、磁性粉の磁気的
凝集が強くなり、配向度が不十分なために、焼結磁石に
した際、期待される特性が得られていない。However, the magnetic interaction of the magnetic powder increases as the saturation magnetization increases. Conventionally, magnetic powders used for rare-earth magnets have large magnetic interaction, strong magnetic agglomeration of the magnetic powder, and insufficient degree of orientation. Not.
【０００８】したがって、従来の製造方法によれば、粉
末の磁化が大きいほど磁気的相互作用が強く現れ、磁性
粉の磁気的凝集により、磁性粉の配向が不十分となり、
エネルギー積が低下するという問題点がある。Therefore, according to the conventional manufacturing method, the larger the magnetization of the powder, the stronger the magnetic interaction appears, and due to the magnetic aggregation of the magnetic powder, the orientation of the magnetic powder becomes insufficient.
There is a problem that the energy product is reduced.
【０００９】本発明の目的は、磁気エネルギー積が大き
く、磁気特性に優れた希土類磁石の製造方法を提供する
ことにある。An object of the present invention is to provide a method for producing a rare earth magnet having a large magnetic energy product and excellent magnetic properties.
【００１０】[0010]
【課題を解決するための手段】本発明は、高特性化を図
るために、Ｒ−Ｔ−Ｂ系で表される合金、焼結体を解砕
して得られた磁性粉を磁場プレスの前段階までに水素吸
蔵処理をして、粉末の磁気特性を低下させ、プレス体を
成形し、脱水素処理を施し、その後、焼結することを特
徴としている。SUMMARY OF THE INVENTION According to the present invention, a magnetic powder obtained by pulverizing an alloy or sintered body represented by an RTB system is used in a magnetic field press in order to improve the characteristics. It is characterized in that hydrogen absorption processing is performed by the previous stage to reduce the magnetic properties of the powder, a pressed body is formed, dehydrogenation processing is performed, and then sintering is performed.
【００１１】従来法より、所望の粉砕粒径に粉砕して焼
結磁石の粉末にすると、高飽和磁化を持つ粉末ほど磁気
的凝集により、焼結磁石の成型時に配向が困難となり、
配向上の限界が生じる。According to the conventional method, when powder is crushed to a desired crushed particle size to obtain a sintered magnet powder, the powder having a higher saturation magnetization becomes harder to be oriented during molding of the sintered magnet due to magnetic aggregation.
There are alignment limitations.
【００１２】そこで、本発明では、粉砕後に水素吸蔵処
理して粉末の磁気特性を低下させ、磁場プレスし、その
後脱水素処理を施し焼結することで焼結磁石の磁気エネ
ルギー積を著しく向上させる。Therefore, in the present invention, the magnetic properties of the powder are reduced by a hydrogen absorbing treatment after the pulverization, and the magnetic properties of the powder are reduced. .
【００１３】本発明によれば、Ｒ−Ｔ−Ｂ系焼結磁石粉
末の製造工程において、粉砕後の粉末を水素吸蔵処理し
粉末の磁気特性を低下させ、最終的に脱水素処理を施す
ことで、エネルギー積が高いＲ−Ｔ−Ｂ系焼結磁石粉末
が得られ、上記Ｒ−Ｔ−Ｂ系焼結磁石粉末の製造方法に
より、エネルギー積が高い希土類焼結磁石が得られる。According to the present invention, in the manufacturing process of the RTB-based sintered magnet powder, the powder after pulverization is subjected to a hydrogen absorbing treatment to reduce the magnetic properties of the powder and finally subjected to a dehydrogenation treatment. Thus, an RTB-based sintered magnet powder having a high energy product can be obtained, and a rare-earth sintered magnet having a high energy product can be obtained by the above-described method of manufacturing the RTB-based sintered magnet powder.
【００１４】本発明における高性能の希土類焼結磁石
は、一般式ＲxＴ100-x-yＢy［ただし、式中、ＲはＮｄ
を必須成分とするＹを含む希土類元素から選択された少
なくとも一種、ＴはＦｅを主成分とする遷移金属Ａｌ、
Ｇａ、Ｓｉの内から選択された少なくとも１種で表さ
れ、Ｒの組成値Ｘは８〜２０、Ｂの組成値ｙは０≦ｙ＜
１０.０（いずれもａｔ％である）］で表される合金お
よび焼結体を解砕して得られた異方性磁性粉により形成
された希土類磁石の製造方法において、磁場プレスの前
段階までに前記磁性粉を液体窒素温度から２００℃の温
度範囲で水素処理を施し、磁場中でプレスし、プレス
後、真空中で脱水素処理を施し、その後、焼結すること
によって得られる。[0014] High-performance rare-earth sintered magnet of the present invention have the general formula R x T 100-xy B y [ In the formula, R represents Nd
At least one element selected from rare earth elements containing Y, which is an essential component, and T is a transition metal Al containing Fe as a main component;
It is represented by at least one selected from Ga and Si, the composition value X of R is 8 to 20, and the composition value y of B is 0 ≦ y <
10.0 (all are at%)] in a method for producing a rare earth magnet formed of anisotropic magnetic powder obtained by crushing an alloy and a sintered body, which is obtained by crushing a sintered body. By the time, the magnetic powder is subjected to hydrogen treatment in a temperature range from liquid nitrogen temperature to 200 ° C., pressed in a magnetic field, pressed, dehydrogenated in vacuum, and then sintered.
【００１５】従って、本発明によれば、磁気エネルギー
積が大きく、磁気特性に優れた希土類磁石の製造方法を
提供することができる。Therefore, according to the present invention, it is possible to provide a method of manufacturing a rare earth magnet having a large magnetic energy product and excellent magnetic properties.
【００１６】[0016]
【発明の実施の形態】本発明の実施の形態について説明
する。Embodiments of the present invention will be described.
【００１７】まず、出発原料として純度９９．９％のＮ
ｄ、９９．８％のＦｅ、９９．５％のＢを用意した。こ
れらの原料を３１Ｎｄ−１．０Ｂ−Ｆｅｂａｌ（ｗｔ
％）に秤量し、高周波溶解を行い、Ｒ−Ｔ−Ｂ系合金を
作製した。この合金を均質化熱処理し、粉砕し、平均粒
径約３μｍの粉末にした後、粉末を２００℃で水素処理
した。First, as a starting material, 99.9% pure N
d, 99.8% Fe and 99.5% B were prepared. These raw materials were converted to 31Nd-1.0B-Febal (wt.
%) And subjected to high frequency melting to produce an RTB-based alloy. This alloy was subjected to a homogenizing heat treatment, pulverized to a powder having an average particle size of about 3 μm, and then the powder was hydrogenated at 200 ° C.
【００１８】次に、この磁性粉を２５ｋＯｅの磁界中で
２．０ｔｏｎ／ｃｍ2の成形圧力で成形した。その成形
体を２００℃で真空中脱水素した後、１０５０℃で焼結
磁石とした。その磁気特性を測定した。Next, this magnetic powder was molded at a molding pressure of 2.0 ton / cm 2 in a magnetic field of 25 kOe. The compact was dehydrogenated in vacuum at 200 ° C., and then sintered at 1050 ° C. The magnetic properties were measured.
【００１９】比較例として、上記実施の形態と同組成の
合金を同様の手順で作製し、従来の製造方法で焼結磁石
を作製した。本発明及び比較例の各々の磁気特性も表１
に示す。As a comparative example, an alloy having the same composition as that of the above embodiment was manufactured in the same procedure, and a sintered magnet was manufactured by a conventional manufacturing method. Table 1 also shows the magnetic properties of each of the present invention and the comparative example.
Shown in
【００２０】 [0020]
【００２１】表１より、本発明の希土類焼結磁石は、磁
気特性、特に残留磁束密度及びエネルギー積が向上して
いることが分かる。From Table 1, it can be seen that the rare earth sintered magnet of the present invention has improved magnetic properties, in particular, residual magnetic flux density and energy product.
【００２２】[0022]
【発明の効果】以上述べたごとく、本発明によれば、エ
ネルギー積が大きく、磁気特性に優れた希土類磁石の製
造方法を提供することが可能となった。As described above, according to the present invention, it is possible to provide a method of manufacturing a rare earth magnet having a large energy product and excellent magnetic properties.
Claims (1)
100-x-yＢy［ただし、式中、ＲはＮｄを必須成分とし、
Ｙを含む希土類元素から選択された少なくとも一種、Ｔ
はＦｅを主成分とする遷移金属およびＡｌ、Ｇａ、Ｓｉ
の内から選択された少なくとも１種を表し、Ｒの組成値
Ｘは８〜２０、Ｂの組成値ｙは０≦ｙ＜１０.０（いず
れもａｔ％である）］で表される合金および焼結体を解
砕して得られた異方性磁性粉により形成された希土類磁
石の製造方法であって、磁場プレスの前段階までに前記
磁性粉を液体窒素温度から２００℃の温度範囲で水素処
理を施し、磁場中でプレスし、プレス後、真空中で脱水
素処理を施し、その後、焼結することを特徴とする希土
類磁石の製造方法。1. A rare-earth sintered magnet of the general formula R x T
100-xy B y [In the formula, R represents an essential component of Nd,
At least one selected from rare earth elements containing Y;
Is a transition metal mainly composed of Fe and Al, Ga, Si
Wherein the composition value X of R is 8 to 20, the composition value y of B is 0 ≦ y <10.0 (all are at%)], and an alloy represented by the following formula: A method for producing a rare earth magnet formed from an anisotropic magnetic powder obtained by crushing a sintered body, wherein the magnetic powder is subjected to a temperature range from liquid nitrogen temperature to 200 ° C. before a magnetic field pressing step. A method for producing a rare earth magnet, which comprises subjecting to hydrogen treatment, pressing in a magnetic field, pressing, dehydrogenating in vacuum, and thereafter sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8280389A JPH10106875A (en) | 1996-09-30 | 1996-09-30 | Manufacturing method of rare-earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8280389A JPH10106875A (en) | 1996-09-30 | 1996-09-30 | Manufacturing method of rare-earth magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10106875A true JPH10106875A (en) | 1998-04-24 |
Family
ID=17624349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8280389A Pending JPH10106875A (en) | 1996-09-30 | 1996-09-30 | Manufacturing method of rare-earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10106875A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031432A (en) * | 2001-07-16 | 2003-01-31 | Showa Denko Kk | Rare-earth sintered magnet and method of manufacturing the same |
| US7517491B2 (en) | 2003-06-12 | 2009-04-14 | Georgia Tech Research Corporation | Processes and methods of making boron carbide |
| JP2009123968A (en) * | 2007-11-15 | 2009-06-04 | Hitachi Metals Ltd | POROUS MATERIAL FOR R-Fe-B BASED PERMANENT MAGNET, AND MANUFACTURING METHOD THEREOF |
| WO2011145477A1 (en) * | 2010-05-19 | 2011-11-24 | 住友電気工業株式会社 | Powder for magnetic member, powder compact, and magnetic member |
| JP2012033865A (en) * | 2010-07-01 | 2012-02-16 | Sumitomo Electric Ind Ltd | Powder for magnetic member, powder compact, and magnetic member |
| JP2012099852A (en) * | 2006-11-30 | 2012-05-24 | Hitachi Metals Ltd | R-Fe-B-BASED FINE CRYSTAL HIGH-DENSITY MAGNET |
| US20120176212A1 (en) * | 2009-08-28 | 2012-07-12 | Intermetallics Co., Ltd. | METHOD AND SYSTEM FOR PRODUCING SINTERED NdFeB MAGNET, AND SINTERED NdFeB MAGNET PRODUCED BY THE PRODUCTION METHOD |
| US8377369B2 (en) | 2004-12-20 | 2013-02-19 | Georgia Tech Research Corporation | Density and hardness pressureless sintered and post-HIPed B4C |
| CN103177867A (en) * | 2013-03-27 | 2013-06-26 | 山西恒立诚磁业有限公司 | Preparation method and device of sintering neodymium iron boron permanent magnet |
| US9076584B2 (en) | 2009-12-04 | 2015-07-07 | Sumitomo Electric Industries, Ltd. | Powder for magnet |
| US9314843B2 (en) | 2010-04-15 | 2016-04-19 | Sumitomo Electric Industries, Ltd. | Powder for magnet |
| US11270840B2 (en) | 2015-07-01 | 2022-03-08 | The University Of Birmingham | Magnet production |
-
1996
- 1996-09-30 JP JP8280389A patent/JPH10106875A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4648586B2 (en) * | 2001-07-16 | 2011-03-09 | 昭和電工株式会社 | Rare earth sintered magnet manufacturing method and rare earth sintered magnet |
| JP2003031432A (en) * | 2001-07-16 | 2003-01-31 | Showa Denko Kk | Rare-earth sintered magnet and method of manufacturing the same |
| US7517491B2 (en) | 2003-06-12 | 2009-04-14 | Georgia Tech Research Corporation | Processes and methods of making boron carbide |
| US7592279B1 (en) | 2003-06-12 | 2009-09-22 | Georgia Tech Research Corporation | Boron carbide and boron carbide components |
| US8377369B2 (en) | 2004-12-20 | 2013-02-19 | Georgia Tech Research Corporation | Density and hardness pressureless sintered and post-HIPed B4C |
| JP2012099852A (en) * | 2006-11-30 | 2012-05-24 | Hitachi Metals Ltd | R-Fe-B-BASED FINE CRYSTAL HIGH-DENSITY MAGNET |
| JP2009123968A (en) * | 2007-11-15 | 2009-06-04 | Hitachi Metals Ltd | POROUS MATERIAL FOR R-Fe-B BASED PERMANENT MAGNET, AND MANUFACTURING METHOD THEREOF |
| US20120176212A1 (en) * | 2009-08-28 | 2012-07-12 | Intermetallics Co., Ltd. | METHOD AND SYSTEM FOR PRODUCING SINTERED NdFeB MAGNET, AND SINTERED NdFeB MAGNET PRODUCED BY THE PRODUCTION METHOD |
| US9076584B2 (en) | 2009-12-04 | 2015-07-07 | Sumitomo Electric Industries, Ltd. | Powder for magnet |
| US9435012B2 (en) | 2009-12-04 | 2016-09-06 | Sumitomo Electric Industries, Ltd. | Method for producing powder for magnet |
| US9129730B1 (en) | 2009-12-04 | 2015-09-08 | Sumitomo Electric Industries, Ltd. | Rare-earth-iron-based alloy material |
| US9460836B2 (en) | 2010-04-15 | 2016-10-04 | Sumitomo Electric Industries, Ltd. | Powder for magnet |
| US9314843B2 (en) | 2010-04-15 | 2016-04-19 | Sumitomo Electric Industries, Ltd. | Powder for magnet |
| WO2011145477A1 (en) * | 2010-05-19 | 2011-11-24 | 住友電気工業株式会社 | Powder for magnetic member, powder compact, and magnetic member |
| KR101362036B1 (en) * | 2010-05-19 | 2014-02-11 | 스미토모덴키고교가부시키가이샤 | Powder for magnetic member, powder compact, and magnetic member |
| US9196403B2 (en) | 2010-05-19 | 2015-11-24 | Sumitomo Electric Industries, Ltd. | Powder for magnetic member, powder compact, and magnetic member |
| CN103151130A (en) * | 2010-05-19 | 2013-06-12 | 住友电气工业株式会社 | Powder for magnetic member, powder compact, and magnetic member |
| JP2012033865A (en) * | 2010-07-01 | 2012-02-16 | Sumitomo Electric Ind Ltd | Powder for magnetic member, powder compact, and magnetic member |
| CN103177867B (en) * | 2013-03-27 | 2015-06-17 | 山西恒立诚磁业有限公司 | Preparation method and device of sintering neodymium iron boron permanent magnet |
| CN103177867A (en) * | 2013-03-27 | 2013-06-26 | 山西恒立诚磁业有限公司 | Preparation method and device of sintering neodymium iron boron permanent magnet |
| US11270840B2 (en) | 2015-07-01 | 2022-03-08 | The University Of Birmingham | Magnet production |
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