JPH0247808A - Rare earth, iron-based resin bonded magnet - Google Patents
Rare earth, iron-based resin bonded magnetInfo
- Publication number
- JPH0247808A JPH0247808A JP19912888A JP19912888A JPH0247808A JP H0247808 A JPH0247808 A JP H0247808A JP 19912888 A JP19912888 A JP 19912888A JP 19912888 A JP19912888 A JP 19912888A JP H0247808 A JPH0247808 A JP H0247808A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- rare earth
- resin
- magnet
- bonded magnet
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 28
- 239000011347 resin Substances 0.000 title claims description 21
- 229920005989 resin Polymers 0.000 title claims description 21
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 16
- 150000002910 rare earth metals Chemical class 0.000 title claims description 16
- 229910052742 iron Inorganic materials 0.000 title claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 150000003624 transition metals Chemical group 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、基本組成が希土類金属、鉄、ボロンからなり
超急冷法でつくられた磁石粉末に熱硬化性樹脂を混合し
て成形後、有機樹脂を真空含浸し、かつ磁石表面に１〜
５０μｍの有機樹脂コーティングした防錆力に優れた高
性能の希土類、鉄系樹脂結合型磁石に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention is based on a magnet powder whose basic composition is rare earth metals, iron, and boron and which is produced by an ultra-quenching method, mixed with a thermosetting resin, and then molded. Vacuum impregnated with organic resin and coated with 1~
This invention relates to a high-performance rare earth and iron-based resin bonded magnet coated with a 50 μm organic resin and having excellent rust prevention properties.
永久磁石は、大きく分けてフェライト磁石、アルニコ磁
石、希土類磁石の３つに分けられるが、近年のＯＡ種機
器ＦＡ機器の小型化、高効率化に伴ない、希土類磁石の
需要が大きく伸びてきた。Permanent magnets can be broadly divided into three types: ferrite magnets, alnico magnets, and rare earth magnets. Demand for rare earth magnets has increased significantly in recent years as office automation equipment and FA equipment have become smaller and more efficient. .
希土類磁石は、その組成から希土類、コバルト系と、希
土類、鉄系に大別される。希土類、鉄系磁石は、１９８
３年にゼネラルモーターズ会（ＧＭ社）と、住友特殊金
属が発表した。ＧＭ社は、超急冷法を採用したのに対し
住友特殊金属は焼結法を採用している。超急冷法の場合
、厚み２０μｍ位のリボンが得られ、その一つ一つの中
は、単磁区粒子の臨界半径よりも微細なサブミクロンオ
ーダー（０，１〜０．５μｍ）の結晶粒より構成されて
いる。従って１７７μｍ以下のバルク状粉末に粉砕して
も保磁力が出る状態に保持されているので樹脂結合型磁
石の原料として利用できる。Rare earth magnets are broadly classified into rare earth/cobalt based magnets and rare earth/iron based magnets based on their composition. Rare earth and iron magnets are 198
The General Motors Association (GM) and Sumitomo Special Metals announced this in 2013. GM uses an ultra-quenching method, while Sumitomo Special Metals uses a sintering method. In the case of the ultra-quenching method, ribbons with a thickness of about 20 μm are obtained, each of which is composed of crystal grains on the submicron order (0.1 to 0.5 μm), which are finer than the critical radius of a single magnetic domain particle. has been done. Therefore, even if it is crushed into a bulk powder of 177 μm or less, it maintains a coercive force and can be used as a raw material for resin-bonded magnets.
以上の原料を使用して、熱硬化性樹脂を加えた磁石は、
圧縮成形により所望の形状のものが得られていた。Magnets using the above raw materials and adding thermosetting resin are
The desired shape was obtained by compression molding.
しかしながら、希土類、鉄系磁石粉末は極めて請易くモ
ータ、リレー等に組み込んだ場合に、錆のために著しく
性能を低下させるという問題を有していた。そこで従来
は、磁石表面に有機樹脂を行い防錆力を得ていた。しか
し、粉末を樹脂で固めた樹脂結合型磁石には、磁石内部
に空孔が多く有り、空気の膨張等によりコーティングの
際にピンホールができやすく完全に防錆ができなかった
。However, rare earth and iron-based magnet powders are extremely easy to use, and when incorporated into motors, relays, etc., they have had the problem of significantly lowering performance due to rust. Therefore, in the past, organic resin was applied to the surface of the magnet to obtain anti-rust properties. However, resin-bonded magnets made by solidifying powder with resin have many holes inside the magnet, and pinholes tend to form during coating due to air expansion, making it impossible to completely prevent rust.
そこで本発明は、樹脂結合型磁石にピンホールの無い防
錆コーティングを行うことを目的とする。Therefore, an object of the present invention is to provide a pinhole-free anti-rust coating to a resin-bonded magnet.
上記問題を解決するために、本発明の希土類、鉄系樹脂
結合型磁石は、基本組成が希土類、鉄、ボロンからなり
超急冷法でつくられた磁石粉末に熱硬化性樹脂を加え圧
縮成形した磁石に有機樹脂を真空含浸し、かつ磁石表面
に有機樹脂コーティングを１〜５０μｍ施したことを特
徴とする。In order to solve the above problems, the rare earth and iron resin-bonded magnet of the present invention is made by adding a thermosetting resin to magnet powder, which has a basic composition of rare earth, iron, and boron, and which is made by an ultra-quenching method and compression-molding it. The magnet is vacuum-impregnated with an organic resin, and the magnet surface is coated with an organic resin coating of 1 to 50 μm.
本発明に使用する真空含浸用の有機樹脂は、エポキシ樹
脂、フェノール樹脂、アクリル樹脂、メラミン樹脂等で
あり、磁石表面にコーティングする樹脂は、エポキシ樹
脂、フェノール樹脂、アクリル樹脂、メラミン樹脂の１
種及び２種以上の混合物、及びフッ素樹脂を混合した物
とする。The organic resin for vacuum impregnation used in the present invention is epoxy resin, phenol resin, acrylic resin, melamine resin, etc., and the resin coated on the magnet surface is one of epoxy resin, phenol resin, acrylic resin, melamine resin.
A mixture of a species, a mixture of two or more species, and a fluororesin.
膜厚は、１μｍ以下では、不均一層の発生により信頼性
確保が困難であり、５０μｍ以上では、高コストになる
ため上記範囲とする。If the film thickness is 1 μm or less, it is difficult to ensure reliability due to the occurrence of a non-uniform layer, and if it is 50 μm or more, the cost will be high, so the above range is set.
原子比が、Ｎｄ＋ａＦｅｖｓＣＯｓＢｓであり超急冷法
により得られた粉末を１７７μｍ以下に粉砕した後、エ
ポキシ樹脂を３重量％加え圧縮成形した。A powder having an atomic ratio of Nd+aFevsCOsBs and obtained by an ultra-quenching method was pulverized to 177 μm or less, and then 3% by weight of epoxy resin was added and compression molded.
これを１５０°Ｃに１時間保持して熱硬化させ磁石を得
た。この磁石にエポキシ樹脂、フェノール樹脂を真空含
浸した後、いろいろな樹脂コーティングを施した。これ
らの磁石を９０”ＣＸ９５％の条件で１ｏｏＯＨ耐食試
験した結果を第１表に示す。This was held at 150°C for 1 hour to heat cure and obtain a magnet. After vacuum-impregnating this magnet with epoxy resin and phenol resin, various resin coatings were applied. Table 1 shows the results of a 1ooOH corrosion resistance test on these magnets under the conditions of 90''CX95%.
第１表
以上述べたように、本発明は、希土類、鉄系樹脂結合型
磁石に有機樹脂を真空含浸した後、有機樹脂コーティン
グをしたため、防錆力が大きく、モータ、スピーカ、セ
ンサー等に用いた場合、その磁気回路における磁束の安
定性にすぐれることはもちろん、その信頼性も高められ
るという効果を有するものである。Table 1 As mentioned above, the present invention has a rare earth/iron resin bonded magnet that is vacuum impregnated with an organic resin and then coated with an organic resin, so it has a high rust prevention ability and can be used in motors, speakers, sensors, etc. In this case, not only the stability of the magnetic flux in the magnetic circuit is excellent, but also the reliability thereof is improved.
以 上
出願人 セイコーエプソン株式会社
代理人 弁理士 鈴木 喜三部 （化１名）評価基準
Ｏ：顕微鏡観察で錆無し
Ｏ： 目視観察で錆無し
Δ：錆が少々有り
×：鯖が多量に有り
第１表より本発明の有機樹脂の真空含浸と有機樹脂コー
ティングの防錆力の相乗効果が絶大であることが明らか
である。Applicant Seiko Epson Co., Ltd. Agent Patent Attorney Kizobe Suzuki (1 person) Evaluation criteria
O: No rust when observed under a microscope O: No rust when visually observed Δ: Some rust present It is clear that this is enormous.
Claims (2)
急冷法でつくられた磁石粉末に熱硬化性樹脂を加え圧縮
成形した磁石において、有機樹脂を真空含浸し、かつ磁
石表面に１〜５０μｍの有機樹脂コーティングしたこと
を特徴とする希土類、鉄系樹脂結合型磁石。(1) A magnet whose basic composition is composed of rare earth metals, iron, and boron, and which is made by adding thermosetting resin to magnet powder made by an ultra-quenching method and compression-molding it. A rare earth/iron resin bonded magnet characterized by a 50μm organic resin coating.
で置換した請求項１に記載の希土類、鉄系樹脂結合型磁
石。(2) The rare earth/iron resin bonded magnet according to claim 1, wherein a part of the iron is replaced with a transition metal other than iron, such as cobalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19912888A JPH0247808A (en) | 1988-08-10 | 1988-08-10 | Rare earth, iron-based resin bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19912888A JPH0247808A (en) | 1988-08-10 | 1988-08-10 | Rare earth, iron-based resin bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0247808A true JPH0247808A (en) | 1990-02-16 |
Family
ID=16402605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19912888A Pending JPH0247808A (en) | 1988-08-10 | 1988-08-10 | Rare earth, iron-based resin bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0247808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06244019A (en) * | 1993-02-16 | 1994-09-02 | Shin Etsu Chem Co Ltd | Magnetic adjuster board for magnetic field generation equipment and preparation thereof |
-
1988
- 1988-08-10 JP JP19912888A patent/JPH0247808A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06244019A (en) * | 1993-02-16 | 1994-09-02 | Shin Etsu Chem Co Ltd | Magnetic adjuster board for magnetic field generation equipment and preparation thereof |
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