JPS6139507A - Neodymium-iron permanent magnet - Google Patents
Neodymium-iron permanent magnetInfo
- Publication number
- JPS6139507A JPS6139507A JP59160409A JP16040984A JPS6139507A JP S6139507 A JPS6139507 A JP S6139507A JP 59160409 A JP59160409 A JP 59160409A JP 16040984 A JP16040984 A JP 16040984A JP S6139507 A JPS6139507 A JP S6139507A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- neodymium
- permanent magnet
- magnetic field
- boron
- 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
- H01F1/057—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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ネオジム−鉄−ボロン−ゲルシマニウム４元
系永久磁石に関するもので、時計、各種電気製品からコ
ンピューター周辺端末、プリンターに到るまで幅広い分
野で利用可能である。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a neodymium-iron-boron-gersimanium quaternary permanent magnet, which can be used in a wide range of applications from watches and various electrical products to computer peripheral terminals and printers. available in the field.
従来、希土類−鉄系永久磁石合金は３元系までが発表報
告されており例えば特開昭５９−４６００８号公開にこ
のような従来の系が示されている。Hitherto, rare earth-iron permanent magnet alloys up to ternary systems have been published and reported, and such a conventional system is disclosed, for example, in Japanese Patent Application Laid-Open No. 59-46008.
従来のネオジム−鉄−ボロ２３元系合金磁石は、高性能
化のためＩＦｅを多量（６０ｗ ｔ％以圭）含んでいる
が、反面キュリ一点が低くボロンを加えてせいぜい３０
０℃前後で、実用に具する場合使用環境温度による表面
磁束密度の変化が大きく不安定であり１例えば高精度高
品質が要求される分野・時計のステッピングモーター等
には、使用が困難である０
本発明は、係る欠点を改善すべく、―気持性値、とりわ
け残留磁束密度の大きな低下はない上でかつキュリ一点
を向上さしめ、環境温度特性の優れた永久磁石を得るこ
とを目的としている。Conventional neodymium-iron-boro 23-element alloy magnets contain a large amount of IFe (more than 60wt%) to improve performance, but on the other hand, the Curie point is low and only 30% IFe is added when boron is added.
When used in practical applications at around 0℃, the surface magnetic flux density changes greatly and is unstable depending on the operating environment temperature.1 For example, it is difficult to use in fields that require high precision and quality, such as stepping motors for watches. 0 In order to improve such drawbacks, the present invention aims to obtain a permanent magnet that does not significantly reduce the feelability value, especially the residual magnetic flux density, improves the Curie point, and has excellent environmental temperature characteristics. There is.
上記問題点を解決するため、本発明は、希土類−遷移金
属間化合物において、キュリ一点を向上させ条有効な手
段として、添加元素による多元系化があることに鑑み、
ネオジム−鉄−ボロン３元系をベースに、多数の組Ｉ！
ｉ、系を調製、試みた。In order to solve the above-mentioned problems, the present invention takes into account that an effective means for improving the Curie point in rare earth-transition metal intermetal compounds is to use additive elements to create a multi-element system.
Based on the neodymium-iron-boron ternary system, many groups I!
i. A system was prepared and tried.
その結果、前述の第２、特許請求の範囲で示された組成
が、問題点を解決するための１つの方法であることを見
出したことに基く。尚、Ｇｅの１０、 Ｏｗ ｔ％以上
の添加は、大幅な磁束密度の低下を招くので、１０．０
ｗｔ％以下に限定するＯ〔作用〕
一般に希土類−鉄系化合物において、例えばＢのような
元素を添加するとｙθ−Ｆｅ原子間距離が大きくなり、
キュリ一点が向上、安定化することが報告されている。As a result, the present invention is based on the discovery that the composition indicated in the second claim described above is one method for solving the problem. Note that adding more than 10.0% of Ge causes a significant decrease in magnetic flux density.
O limited to wt% or less [effect] In general, in rare earth-iron compounds, when an element such as B is added, the yθ-Fe interatomic distance increases,
It has been reported that Curi's score is improved and stabilized.
（参考文猷、日本応用磁気学会主催、第３５回研究会資
料） 本発明においても、Ｇｅを添加することにより、
キュリ一点向上に寄与する作用をもつと考えられる。(Reference Bunyu, materials from the 35th research meeting sponsored by the Japanese Society of Applied Magnetics) Also in the present invention, by adding Ge,
It is thought to have the effect of contributing to an improvement in curri by one point.
〔実施例１〕 以下本発明の詳細な説明する。[Example 1] The present invention will be explained in detail below.
ネオジム３３．５ ｗ ｔ％、ボロン１．３ ｗ ｔ％
、ゲルマニウムＱ、 ５ ｗ ｔ％、残Ｆｅ（ただし酸
素、窒素等の不純物は２００ｐｐｍ以下）の組成となる
様、秤量し、高周波溶解炉にてインゴットを調製する０
この後ショークラッシャーで１ｍ角まで予備粉砕した後
・ディスクミルで５０〜１００μｍまで粗く粉砕し、更
にボールミルで粒度３〜５μ情の合金粉末を得る。次に
本磁性粉末に配向性を付与させるため、横型磁界中プレ
ス（磁界の印加力向上プレスの圧力方向）で、１万エル
ステツドの磁界強度中で圧力２トン／−で成型する。更
に高密化を達成させる目的で、真空中で１１００”０Ｘ
１Ｈの処理を施し炉冷した０また保磁力教養の為に次に
６１０℃で１時間時効処理を施した。Neodymium 33.5 wt%, boron 1.3 wt%
, germanium Q, 5 wt%, residual Fe (however, impurities such as oxygen and nitrogen are 200 ppm or less), and an ingot is prepared in a high frequency melting furnace.
Thereafter, it is pre-pulverized to a size of 1 m square using a show crusher, coarsely crushed to a size of 50 to 100 μm using a disk mill, and then further crushed to a particle size of 3 to 5 μm using a ball mill to obtain alloy powder. Next, in order to impart orientation to the magnetic powder, it is molded using a horizontal magnetic field press (in the pressure direction of the press for increasing the applied force of the magnetic field) at a pressure of 2 tons/- in a magnetic field strength of 10,000 oersteds. For the purpose of achieving even higher density, 1100"0X in vacuum
The material was subjected to a 1H treatment and cooled in a furnace, and then an aging treatment was performed at 610° C. for 1 hour to develop the coercive force.
試料測定は、゛ブロックより切り出し、水平同軸補償４
πニーＨコイルを用い測定した。For sample measurement, cut out from the block and horizontal coaxial compensation 4
Measurement was performed using a π knee H coil.
以下結果を従来のＧｏが含まれていない３元系Ｎ ｄ
−Ｆ ｅ −Ｂ系の場合と比較し第１表に示す。The results are shown below for the conventional ternary system N d that does not contain Go.
A comparison with the case of -F e -B system is shown in Table 1.
第 １ 表
従来の６元系と比較し残留磁束密度が小さな低下はある
もののキーリ一点が最大２１０℃も上昇したことが判明
できる０また最も使用されると考えられる環境温度域（
−２０℃〜＋８０℃）における磁石裸体の表面磁束密度
への温度特性を添付図面に示す。この図より、Ｎｄ−Ｆ
ｅ−Ｂ３元系永久磁石材料がＧｅを添加し４元系とする
ことにより初めて精密電子部品用磁石（例えば電子式腕
時計用ローター磁石）として使用可能となることが判る
。Table 1: Although there is a small decrease in residual magnetic flux density compared to the conventional six-element system, it can be seen that the temperature at one point of Keeley has increased by up to 210℃.
The temperature characteristics of the surface magnetic flux density of the bare magnet body at temperatures ranging from -20°C to +80°C are shown in the attached drawings. From this figure, Nd-F
It can be seen that the e-B ternary permanent magnet material can be used as a magnet for precision electronic parts (for example, a rotor magnet for an electronic wristwatch) only by adding Ge to make it a quaternary permanent magnet material.
本発明は以上説明したように、従来の３元／Ａ”ｄ−Ｐ
θ−Ｂ系磁石は、その表面磁束密度が使用する環境温度
により大きく影響を受け、いわ噛る信頼性の欠ける磁石
であったが、Ｇｅを添加することにより大幅にキュリ一
点が改善され、従って温度特性の優れた磁石の提供か可
能となった゛・とりわけそのこと−は、表面磁束の精度
が強く要求される分野に対し工業的価値は大き′い。As explained above, the present invention is based on the conventional ternary/A"dP
The surface magnetic flux density of θ-B magnets is greatly affected by the environmental temperature in which they are used, and they have been somewhat unreliable. However, by adding Ge, the Curie point has been significantly improved, and therefore The fact that it is now possible to provide magnets with excellent temperature characteristics is of great industrial value in fields where surface magnetic flux accuracy is strongly required.
図は、環境温度による本系磁石の表面磁束密度による影
響を示した図である〇
以上The figure shows the influence of surface magnetic flux density of this system magnet due to environmental temperature.
Claims (1)
５〜２．５ｗｔ％、ゲルマニウム（Ｇｅ）０．１〜１０
．０ｗｔ％、残Ｆｅから構成される磁気異方性合金であ
ることを特徴とする永久磁石。Neodymium (Nd) 25-35wt%, boron (B) 0.
5-2.5wt%, germanium (Ge) 0.1-10
．． A permanent magnet characterized by being a magnetically anisotropic alloy comprising 0 wt% of residual Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59160409A JPS6139507A (en) | 1984-07-30 | 1984-07-30 | Neodymium-iron permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59160409A JPS6139507A (en) | 1984-07-30 | 1984-07-30 | Neodymium-iron permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6139507A true JPS6139507A (en) | 1986-02-25 |
Family
ID=15714310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59160409A Pending JPS6139507A (en) | 1984-07-30 | 1984-07-30 | Neodymium-iron permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6139507A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248981A2 (en) * | 1986-06-12 | 1987-12-16 | Kabushiki Kaisha Toshiba | Permanent magnet and permanent magnetic alloy |
| EP0258609A2 (en) * | 1986-07-23 | 1988-03-09 | Hitachi Metals, Ltd. | Permanent magnet with good thermal stability |
| US4990876A (en) * | 1989-09-15 | 1991-02-05 | Eastman Kodak Company | Magnetic brush, inner core therefor, and method for making such core |
| KR20220065674A (en) * | 2020-11-13 | 2022-05-20 | 코마도 쏘시에떼 아노님 | Corrosion-inhibiting protection for watch magnets, in particular neodymium-iron-boron magnets |
-
1984
- 1984-07-30 JP JP59160409A patent/JPS6139507A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248981A2 (en) * | 1986-06-12 | 1987-12-16 | Kabushiki Kaisha Toshiba | Permanent magnet and permanent magnetic alloy |
| EP0258609A2 (en) * | 1986-07-23 | 1988-03-09 | Hitachi Metals, Ltd. | Permanent magnet with good thermal stability |
| US4990876A (en) * | 1989-09-15 | 1991-02-05 | Eastman Kodak Company | Magnetic brush, inner core therefor, and method for making such core |
| KR20220065674A (en) * | 2020-11-13 | 2022-05-20 | 코마도 쏘시에떼 아노님 | Corrosion-inhibiting protection for watch magnets, in particular neodymium-iron-boron magnets |
| JP2022078952A (en) * | 2020-11-13 | 2022-05-25 | コマディール・エス アー | Anti-corrosion protection for portable timepiece magnets, in particular neodymium-iron-boron magnets |
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