JPH01103807A - Rare-earth iron resin-bonded magnet - Google Patents
Rare-earth iron resin-bonded magnetInfo
- Publication number
- JPH01103807A JPH01103807A JP62261214A JP26121487A JPH01103807A JP H01103807 A JPH01103807 A JP H01103807A JP 62261214 A JP62261214 A JP 62261214A JP 26121487 A JP26121487 A JP 26121487A JP H01103807 A JPH01103807 A JP H01103807A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- powder
- magnet
- raw material
- metal
- 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 abstract description 18
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 title claims description 7
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000006247 magnetic powder Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 5
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052796 boron Inorganic materials 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 150000003624 transition metals Chemical class 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 238000010791 quenching Methods 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 10
- 230000006866 deterioration Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film 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
- H01F1/0572—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
Abstract
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Ｒ−Ｆｅ−Ｂからなる希土類鉄系樹
脂結合型磁石に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rare earth iron-based resin-bonded magnet whose basic composition is R-Fe-B.
本発明は基本組成がＲ−Ｆｅ−Ｂからなる希土類鉄系樹
脂結合型磁石において、原料粉末に１０μｍ以下の非磁
性の金属又は金属酸化物の微粉末を、添加することによ
り磁石表面を平担なものとし、防錆のためのコーティン
グの効果を向上させるものである。The present invention provides a rare earth iron-based resin-bonded magnet having a basic composition of R-Fe-B, by adding fine powder of non-magnetic metal or metal oxide of 10 μm or less to the raw material powder to flatten the surface of the magnet. This improves the effectiveness of anti-rust coatings.
基本組成がＲ−Ｆｅ−Ｂからなる急冷薄帯法により得ら
れた磁性粉末は樹脂結合磁石の原料として使用されるが
、粉末の物性上、３０μｍ以下に粉砕すると酸化し性能
が劣化するので３０μｍ以下の粉末は使用出来ない。従
って３０μｍ以上の原料粉末を用いて磁石を成形するこ
とになり、磁石表面がかなり荒いものとなる。Magnetic powder obtained by the quenched ribbon method, which has a basic composition of R-Fe-B, is used as a raw material for resin-bonded magnets, but due to the physical properties of the powder, if it is pulverized to less than 30 μm, it will oxidize and the performance will deteriorate. The following powders cannot be used. Therefore, the magnet is molded using raw material powder with a diameter of 30 μm or more, and the surface of the magnet becomes quite rough.
一方、Ｒ−Ｆｅ−Ｂ系の磁石は実用的使用の為には、防
錆のためにコーティングをする必要があるが、磁石表面
が荒れていると、それを完全にカバーするだけの厚さの
コーティングをしなくてはならないので一般に３０−５
０μｍの膜厚のコーティングが必要とされる。On the other hand, for practical use, R-Fe-B magnets need to be coated with a coating to prevent rust, but if the magnet surface is rough, the thickness is insufficient to completely cover it. Generally, the coating is 30-5.
A coating thickness of 0 μm is required.
しかし、このように厚いコーティングをおこなうことは
、コストを上げるばかりか、寸法精度も得られにくくな
る。又、磁気性能を低下させる原因にもなる。However, applying such a thick coating not only increases cost but also makes it difficult to obtain dimensional accuracy. It also causes deterioration of magnetic performance.
本発明は以上の問題点を解決するもので、その目的は薄
いコーテイング膜で従来レベルの防錆効果を得られるよ
うにすることにある。The present invention is intended to solve the above-mentioned problems, and its purpose is to make it possible to obtain a conventional level of rust prevention effect with a thin coating film.
本発明の樹脂結合型磁石は、基本組成がＲ−Ｆｅ−Ｂか
らなる磁性粉末に１０μｍ以下の非磁性の金属又は金属
酸化物の微粉末を添加したものを原料とすることを特徴
とする。The resin-bonded magnet of the present invention is characterized in that the raw material is a magnetic powder having a basic composition of R-Fe-B to which fine powder of a non-magnetic metal or metal oxide of 10 μm or less is added.
急冷薄帯法で作られたＲ−Ｆｅ−Ｂ基磁性粉末を樹脂結
合型磁石の原料として使用する場合、粉末粒径は最低３
０μｍである。このため磁石表面に１５−２０μｍの凹
凸ができる。しかし、これに１０μｍ以下の微粉末を添
加すれば凹凸が埋められ表面の荒さが改良される。磁石
表面の荒さが改良されたことにより防錆のコーティング
層の厚さを薄く出来る。When using R-Fe-B based magnetic powder made by the quenched ribbon method as a raw material for resin-bonded magnets, the powder particle size should be at least 3.
It is 0 μm. As a result, irregularities of 15 to 20 μm are formed on the magnet surface. However, if fine powder of 10 μm or less is added to this, the unevenness will be filled and the roughness of the surface will be improved. By improving the roughness of the magnet surface, the thickness of the anti-rust coating layer can be reduced.
尚、添加量を５−５０ ｗ ｔ％としたのは、５ｗｔ％
以下では添加による表面の荒さの改良がおこなわれず、
５０ｗｔ％以上では磁気性能の劣化により実用性が失わ
れる為である。In addition, the addition amount was 5-50 wt%.
In the following cases, the surface roughness is not improved by addition.
This is because if it exceeds 50 wt%, practicality is lost due to deterioration of magnetic performance.
急冷薄帯法によって得られたＮｄ−Ｆｅ−Ｈの薄膜をボ
ールミルで平均粒子径５０μｍになるまで粉砕し、平均
粒子径５μｍのＳＵＳ粉末を２０ｗｔ％添加し原料粉末
を作った。The Nd-Fe-H thin film obtained by the quenched ribbon method was ground in a ball mill until the average particle size was 50 μm, and 20 wt % of SUS powder with an average particle size of 5 μm was added to prepare a raw material powder.
原料粉末にエポキシ樹脂２．５ｗｔ％を加え混練した後
、５ｔｏｎ／ｃｍ’の圧力で圧縮成形し１５０°Ｃで１
時間キュアーして磁石を得た。After adding 2.5 wt% of epoxy resin to the raw material powder and kneading, it was compression molded at a pressure of 5 ton/cm' and molded at 150°C.
After curing for a time, a magnet was obtained.
磁石は四フッ化エチレンを含むエポキシ樹脂で膜厚を変
えてコーティングを行い、湿度９５％、温度６０°Ｃの
中で１００時間、保持し錆の発生状況を調べた。The magnets were coated with varying thicknesses of epoxy resin containing tetrafluoroethylene and kept at 95% humidity and 60°C for 100 hours to check for rust formation.
尚、比較としてＳＵＳ粉末を含まない磁石についても同
様の耐湿試験をおこなった。For comparison, a similar moisture resistance test was also conducted on a magnet that did not contain SUS powder.
結果を表１に示す。The results are shown in Table 1.
表１ 耐湿試験結果
膜厚（μｍ） 本発明 従来法
（ＳＵＳ粉） （ＳＵＳ粉）
２０％ なし
Ｉ Ｘ Ｘ
５ Δ Ｘ
１０ ０ Δ２０
０ ΔＸ：目視で錆仔り
Δ：目視で錆無し、顕微鏡観察で存り
○：顕微鏡観察で錆無し
表１かられかるようにＳＵＳの微粉末を添加することに
より薄いコーティングで高い耐湿性が実現された。Table 1 Moisture resistance test results film thickness (μm) Present invention Conventional method (SUS powder) (SUS powder) 20% None I X X 5 Δ X 10 0 Δ20
0 ΔX: Rust visible by visual inspection Δ: No rust by visual inspection, no rust by microscopic observation ○: No rust by microscopic observation As shown in Table 1, by adding SUS fine powder, high moisture resistance is achieved with a thin coating. Realized.
以上、述べてきたように本発明により薄いコーティング
で高い防錆力が得られることになり、高い寸法精度を要
求されるステップモータやスピーカ等に希土類鉄系樹脂
結合型磁石を使用出来るようになった。As mentioned above, the present invention allows high rust prevention power to be obtained with a thin coating, making it possible to use rare earth iron resin-bonded magnets in step motors, speakers, etc. that require high dimensional accuracy. Ta.
以 上that's all
Claims (2)
ボロン（Ｂ）からなる磁性粉末に粒径が１０μｍ以下の
非磁性の金属又は金属酸化物の微粉末５−５０ｗｔ％を
添加したものを原料とすることを特徴とする希土類鉄系
樹脂結合型磁石。(1) 5-50 wt% of fine powder of non-magnetic metal or metal oxide with a particle size of 10 μm or less is added to magnetic powder whose basic composition is rare earth metal (R), iron (Fe), and boron (B). A rare earth iron-based resin-bonded magnet characterized by using a rare earth iron-based resin as a raw material.
の少なくとも一種の遷移金属で置換した特許請求の第１
項記載の希土類鉄系樹脂結合型磁石。(2) The first patent claim in which a part of Fe is replaced with at least one transition metal other than Fe, such as cobalt (Co).
Rare earth iron-based resin bonded magnet as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62261214A JPH01103807A (en) | 1987-10-16 | 1987-10-16 | Rare-earth iron resin-bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62261214A JPH01103807A (en) | 1987-10-16 | 1987-10-16 | Rare-earth iron resin-bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01103807A true JPH01103807A (en) | 1989-04-20 |
Family
ID=17358729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62261214A Pending JPH01103807A (en) | 1987-10-16 | 1987-10-16 | Rare-earth iron resin-bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01103807A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03129802A (en) * | 1989-10-16 | 1991-06-03 | Toshiba Corp | Resin bonded rare-earth magnet |
| JPH0547522A (en) * | 1991-08-10 | 1993-02-26 | Sankyo Seiki Mfg Co Ltd | Rare-earth bonded magnet |
-
1987
- 1987-10-16 JP JP62261214A patent/JPH01103807A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03129802A (en) * | 1989-10-16 | 1991-06-03 | Toshiba Corp | Resin bonded rare-earth magnet |
| JPH0547522A (en) * | 1991-08-10 | 1993-02-26 | Sankyo Seiki Mfg Co Ltd | Rare-earth bonded magnet |
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