JPH05175027A - Permanent magnet material - Google Patents
Permanent magnet materialInfo
- Publication number
- JPH05175027A JPH05175027A JP3357822A JP35782291A JPH05175027A JP H05175027 A JPH05175027 A JP H05175027A JP 3357822 A JP3357822 A JP 3357822A JP 35782291 A JP35782291 A JP 35782291A JP H05175027 A JPH05175027 A JP H05175027A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- powder
- magnet material
- coercive force
- alloy
- 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
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
- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【００１０】[0010]
【産業上の利用分野】本発明は、Ｓｍ−Ｆｅ−Ｎ−Ｂ系
組成を有する永久磁石材料に関し、特に保磁力の優れた
永久磁石材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet material having an Sm-Fe-NB composition, and more particularly to a permanent magnet material having excellent coercive force.
【００２０】[0020]
【従来の技術】永久磁石材料は近年、自動車のカーエレ
クトロニクス化にともなって各種の小形モーター、アク
チュエーター材料として広く利用されている。そして、
これらの機器の小形化、軽量化のために一層の高性能化
が求められている。永久磁石材料として、Ｓｍ−Ｃｏ系
およびＮｄ−Ｆｅ−Ｂ系が開発され実用化されている。
しかし、、Ｓｍ−Ｃｏ系はキュリー点は高く温度特性は
優れているものの飽和磁化が低く、他方Ｎｄ−Ｆｅ−Ｂ
系はキュリー点は低く温度特性は劣るものの飽和磁化は
高い。2. Description of the Related Art In recent years, permanent magnet materials have been widely used as materials for various small motors and actuators with the progress of car electronics in automobiles. And
Further miniaturization and weight reduction of these devices are required for higher performance. As permanent magnet materials, Sm-Co-based and Nd-Fe-B-based materials have been developed and put into practical use.
However, although the Sm-Co system has a high Curie point and excellent temperature characteristics, it has a low saturation magnetization, while Nd-Fe-B.
The system has a low Curie point and poor temperature characteristics, but high saturation magnetization.
【００３０】この点を改善するために種々の研究がなさ
れているが、本質的な解決には到っていない。そこで新
規な材料の出現が望まれていた。近年、飽和磁化は高い
もののキュリー点はさらに低く温度特性が劣悪という大
きな短所をもっているＳｍ−Ｆｅ系磁石材料が注目さ
れ、報告されはじめている。この劣悪な温度特性を改善
する方法として、窒素（Ｎ）をＳｍ2 Ｆｅ7 金属間化合
物に侵入させることにより一軸異方性化を達成し、キュ
リー温度の上昇を図っている。Ｒ−Ｆｅ−Ｎ−Ｈ系材料
（例えば、特開平２−５７６６３号又は特開平３−１５
３８５２号公報）について飽和磁束密度、キュリー温度
の改善が報告されており、さらにＲ−Ｆｅ−Ｎ系材料に
おいて磁性粉末の製造方法（例えば、特開平３−１４１
６０９号）により保磁力の改善が報告されている。ま
た、日本金属学会春季大会講演概要（１９９１．４）に
おいても保磁力の改善について報告がされている。しか
しながら、実用的な永久磁石材料としてはＳｍ−Ｆｅ−
Ｎ系材料の保磁力（ｉＨｃ）は数ＫＯｅ程度しか得られ
ていない。Various studies have been made to improve this point, but the essential solution has not been reached. Therefore, the advent of new materials has been desired. In recent years, Sm-Fe based magnet materials, which have high saturation magnetization but lower Curie point and poor temperature characteristics, have been attracting attention and reported. As a method for improving this poor temperature characteristic, nitrogen (N) is introduced into the Sm 2 Fe 7 intermetallic compound to achieve uniaxial anisotropy and increase the Curie temperature. R—Fe—N—H-based material (for example, JP-A-2-57663 or JP-A-3-15)
3852), improvements in saturation magnetic flux density and Curie temperature have been reported, and a method for producing magnetic powder in an R—Fe—N-based material (for example, Japanese Patent Laid-Open No. 3-141).
No. 609) reported improvement in coercive force. Further, improvement of coercive force is also reported in the summary of the spring meeting of the Japan Institute of Metals (1991.4). However, as a practical permanent magnet material, Sm-Fe-
The coercive force (iHc) of the N-based material is only about several KOe.
【００４０】[0040]
【発明が解決しようとする課題】本発明はキュリー温度
の改善されたＳｍ−Ｆｅ−Ｎ系の材料について、さらに
高い保磁力を有し、永久磁石材料として優れた高性能磁
性材料を提供するものである。The present invention provides an Sm-Fe-N-based material having an improved Curie temperature, which has a higher coercive force and is excellent as a permanent magnet material. Is.
【００５０】[0050]
【課題を解決するための手段】本発明者らは、前記問題
点を解決するために鋭意研究を重ねた結果、Ｓｍ−Ｆｅ
−Ｎ−Ｂ系の材料がキュリー温度も高く温度特性に優
れ、かつ保磁力が大幅に優れていることを見いだし、本
発明を完成するに至った。すなわち、本発明はＳｍX Ｆ
ｅ(100-X-Y-Z) ＮY ＢZ で表される永久磁石材料であ
り、Ｘ、Ｙ、Ｚはそれぞれ原子百分率で、 ８．０≦Ｘ≦２０．０ ９．０≦Ｙ≦１５．０ ０．１≦Ｚ≦ ０．５ であることを特徴としている。本発明においては、Ｓｍ
は原子百分率で８〜２０％であることが必要である。８
％未満では保磁力が小さくなってしまい、２０％を越え
ると飽和磁束密度が小さくなる。Ｎは、原子百分率で９
〜１５％であることが必要である。９％未満では保磁力
が小さくなってしまい、また１５％を越えても保磁力が
小さくなつてしまう。Ｂは、原子百分率で０．１〜０．
５％であることが必要である。０．１未満ではＢ添加に
よる効果が表れず、保磁力は低く、０．５％を越えると
保磁力は小さくなってしまう。本発明において、最も重
要な点はＢを含有していることである。この含有によ
り、Ｓｍ−Ｆｅ−Ｎ系では達成できない程の保磁力を著
しく改善したことである。また、キュリー温度はＳｍ−
Ｆｅ−Ｎ系にＢを含有しても低下せず、高い温度を維持
して温度特性が優れていることである。The present inventors have conducted extensive studies to solve the above problems, and as a result, Sm-Fe
It was found that the -NB system material has a high Curie temperature, excellent temperature characteristics, and significantly excellent coercive force, and completed the present invention. That is, the present invention is Sm X F
e (100-XYZ) N Y B Z is a permanent magnet material, where X, Y, and Z are atomic percentages, respectively, 8.0 ≦ X ≦ 20.0 9.0 ≦ Y ≦ 15.00 It is characterized in that 1 ≦ Z ≦ 0.5. In the present invention, Sm
Must be 8 to 20% in atomic percentage. 8
If it is less than%, the coercive force becomes small, and if it exceeds 20%, the saturation magnetic flux density becomes small. N is 9 in atomic percentage
It should be ~ 15%. If it is less than 9%, the coercive force will be small, and if it exceeds 15%, the coercive force will be small. B is 0.1 to 0.
It needs to be 5%. If it is less than 0.1, the effect due to the addition of B is not exhibited and the coercive force is low, and if it exceeds 0.5%, the coercive force becomes small. In the present invention, the most important point is that B is contained. This content significantly improves the coercive force that cannot be achieved with the Sm-Fe-N system. The Curie temperature is Sm-
Even if B is contained in the Fe-N-based material, it does not decrease, and it maintains a high temperature and has excellent temperature characteristics.
【００６０】[0060]
【実施例】以下、実施例により本発明を詳細に説明す
る。出発原料として純度９９．９％のＳｍと純度９９．
９％の電解鉄および純度９９．７％のＢを使用し、これ
らをボタンアーク炉で溶解し、水冷銅型に鋳造した。そ
の後、液体急冷装置を使用してこの鋳造品を再溶解し急
冷してリボンを作製した。次に、このリボンをミル粉砕
して粒径１０μ程度の粉末を得た。得られた粉末を管状
炉の中にいれ、５００℃において純度９９．９９９％の
窒素ガスを１時間流して窒化を行った後、室温まで冷却
した。こうして得られた磁性粉末を使用してボンド磁石
を作製し、磁気測定を行った。測定方法は、５０ＫＯｅ
のパルス磁界を印加した後、ＶＳＭ（振動型試料磁力
計）で保磁力を測定した。磁性粉末の組成および保磁力
を表１に示す。The present invention will be described in detail below with reference to examples. As a starting material, Sm having a purity of 99.9% and a purity of 99.
Using 9% electrolytic iron and 99.7% pure B, these were melted in a button arc furnace and cast into a water cooled copper mold. After that, this casting was remelted and rapidly cooled using a liquid quenching device to produce a ribbon. Next, the ribbon was milled to obtain a powder having a particle size of about 10 μm. The obtained powder was put into a tubular furnace, and nitrogen gas having a purity of 99.999% was passed at 500 ° C. for 1 hour for nitriding, and then cooled to room temperature. Using the magnetic powder thus obtained, a bonded magnet was produced and magnetic measurements were performed. The measuring method is 50KOe
After applying the pulsed magnetic field of, the coercive force was measured with VSM (vibrating sample magnetometer). Table 1 shows the composition and coercive force of the magnetic powder.
【００７０】[0070]
【表１】 [Table 1]
【００８０】表１の結果から、本発明例Ａ〜Ｅにおいて
は保磁力は改善され高い値が得られている。しかし、比
較例ＦはＳｍが少ないために保磁力が改善されていな
い。比較例ＧはＢが添加されていないため、そして比較
例ＨはＢが多く添加されているためにそれぞれ保磁力が
低くなつている。From the results shown in Table 1, in Examples A to E of the present invention, the coercive force was improved and a high value was obtained. However, in Comparative Example F, the coercive force is not improved because Sm is small. In Comparative Example G, B is not added, and in Comparative Example H, the coercive force is low because B is added in a large amount.
【００９０】[0090]
【発明の効果】本発明の特定合金成分によれば、保磁力
の優れた永久磁石材料が得られる。According to the specific alloy component of the present invention, a permanent magnet material having an excellent coercive force can be obtained.
Claims (1)
れる永久磁石材料であり、Ｘ、Ｙ、Ｚはそれぞれ原子百
分率で、 ８．０≦Ｘ≦２０．０ ９．０≦Ｙ≦１５．０ ０．１≦Ｚ≦ ０．５ であることを特徴とする永久磁石材料1. A permanent magnet material represented by Sm X Fe (100-XYZ) N Y B Z , where X, Y, and Z are atomic percentages, respectively, 8.0 ≦ X ≦ 20.0 9.0. ≦ Y ≦ 15.0 0.1 ≦ Z ≦ 0.5 Permanent magnet material characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3357822A JPH05175027A (en) | 1991-12-25 | 1991-12-25 | Permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3357822A JPH05175027A (en) | 1991-12-25 | 1991-12-25 | Permanent magnet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05175027A true JPH05175027A (en) | 1993-07-13 |
Family
ID=18456103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3357822A Pending JPH05175027A (en) | 1991-12-25 | 1991-12-25 | Permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05175027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999062080A1 (en) * | 1998-05-28 | 1999-12-02 | Rhodia Chimie | Method for preparing a magnetic material by forging and magnetic material in powder form |
-
1991
- 1991-12-25 JP JP3357822A patent/JPH05175027A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999062080A1 (en) * | 1998-05-28 | 1999-12-02 | Rhodia Chimie | Method for preparing a magnetic material by forging and magnetic material in powder form |
| FR2779267A1 (en) * | 1998-05-28 | 1999-12-03 | Rhodia Chimie Sa | PROCESS FOR PREPARING A MAGNETIC MATERIAL BY FORGING AND MAGNETIC MATERIAL IN POWDER FORM |
| US6592682B1 (en) | 1998-05-28 | 2003-07-15 | Santoku Corporation | Method for preparing a magnetic material by forging and magnetic material in powder form |
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