JPH0810651B2 - Magnetic alloy ribbon coating method - Google Patents
Magnetic alloy ribbon coating methodInfo
- Publication number
- JPH0810651B2 JPH0810651B2 JP61256233A JP25623386A JPH0810651B2 JP H0810651 B2 JPH0810651 B2 JP H0810651B2 JP 61256233 A JP61256233 A JP 61256233A JP 25623386 A JP25623386 A JP 25623386A JP H0810651 B2 JPH0810651 B2 JP H0810651B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic alloy
- alloy ribbon
- sol
- ribbon
- magnetic
- 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.)
- Expired - Fee Related
Links
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- Other Surface Treatments For Metallic Materials (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
【発明の詳細な説明】 ［発明の構成］ （産業上の利用分野） 本発明は磁性合金薄帯の被膜形成方法に関し、特に絶
縁性、耐食性を向上させるものである。DETAILED DESCRIPTION OF THE INVENTION [Composition of the Invention] (Field of Industrial Application) The present invention relates to a method for forming a film of a magnetic alloy ribbon, and particularly, to improve insulation and corrosion resistance.
（従来の技術） 非晶質磁性合金は、高電気抵抗率、高透磁率、高磁束
密度、低保磁力等の種々の特長を有するため、トランス
や電動機の鉄心材料として注目されている。また、パー
マロイ（Fe−Ni合金）も高透磁率を有し、弱電用を中心
とした鉄心材料として大量に用いられている。(Prior Art) Amorphous magnetic alloys have various characteristics such as high electric resistivity, high magnetic permeability, high magnetic flux density, and low coercive force, and are therefore attracting attention as iron core materials for transformers and electric motors. Further, permalloy (Fe-Ni alloy) also has a high magnetic permeability and is used in large quantities as an iron core material mainly for weak electric applications.
これらの非晶質磁性合金薄帯やパーマロイ薄帯を、巻
鉄心あるいは積層鉄心として成形する場合、薄帯間に層
間絶縁を施せば交流磁気特性を向上させることができる
ので、これらの薄帯の表面に層間絶縁のための被膜を形
成することは不可欠の要素である。When these amorphous magnetic alloy ribbons and permalloy ribbons are formed as wound cores or laminated iron cores, AC magnetic characteristics can be improved by providing interlayer insulation between the ribbons. Forming a film for interlayer insulation on the surface is an essential element.
また、非晶質磁性合金薄帯は、それほど高温・高湿の
環境下でなくとも10〜30日程度で赤錆が発生するため、
耐食性を向上するうえでもその表面に被膜を形成するこ
とが望ましい。Also, since amorphous magnetic alloy ribbons generate red rust in about 10 to 30 days even under a high temperature and high humidity environment,
In order to improve the corrosion resistance, it is desirable to form a film on the surface.
従来、磁性合金薄帯の層間絶縁及び耐食性向上のため
に、その表面に被膜を形成する技術としては、粒径数μ
ｍ〜数十μｍの金属酸化物等の粉体を分散させた溶剤を
使用する方法、樹脂を使用する方法（例えば特開昭58−
109171号）あるいはクロム酸又はリン酸を使用する方法
（例えば特開昭60−56071号）が知られている。Conventionally, as a technique for forming a film on the surface of a magnetic alloy ribbon to improve interlayer insulation and corrosion resistance, the grain size is several μm.
A method of using a solvent in which a powder of a metal oxide having a particle size of m to several tens of μm is dispersed, a method of using a resin (see, for example, JP-A-58-
109171) or a method using chromic acid or phosphoric acid (for example, JP-A-60-56071).
しかしながら、酸化物等の粉体を分散させた溶剤を用
いる方法では、形成される被膜の密着性が悪いという問
題がある。また、樹脂を使用する方法では、被膜となる
樹脂の耐熱温度が低いため、鉄心の磁気特性の向上を目
的として通常施される非晶質磁性合金では350℃以上、
パーマロイでは600℃以上の焼鈍が困難であり、磁気特
性を向上できないという問題がある。また、クロム酸や
リン酸を用いる方法では、一般に焼付けのために400〜5
00℃、あるいはそれ以上の加熱が必要となるため、得に
非晶質磁性合金薄帯では脆化や不必要な結晶化をもたら
し、やはり磁気特性の点で問題が生じる。なお、この方
法において焼付けのための加熱温度を低下させる目的
で、クロム酸やリン酸に有機物を混入する方法（特開昭
61−8903号）が提案されているが、こうした方法では形
成される被膜の耐熱温度が低下し、樹脂を用いる方法と
同様な問題が生じる。However, the method using a solvent in which a powder such as an oxide is dispersed has a problem that the formed film has poor adhesion. Further, in the method of using a resin, since the heat resistance temperature of the resin forming the coating is low, 350 ° C. or higher in the amorphous magnetic alloy that is usually applied for the purpose of improving the magnetic properties of the iron core,
Permalloy has a problem that it is difficult to anneal at 600 ° C or higher, and the magnetic properties cannot be improved. Further, in the method using chromic acid or phosphoric acid, generally 400 to 5 for baking.
Since heating at 00 ° C. or higher is required, the amorphous magnetic alloy ribbon is particularly prone to embrittlement and unnecessary crystallization, which also causes a problem in terms of magnetic properties. In this method, an organic substance is mixed with chromic acid or phosphoric acid for the purpose of lowering the heating temperature for baking.
No. 61-8903) has been proposed, but the heat-resistant temperature of the coating formed by such a method is lowered, and the same problem as in the method using a resin occurs.
これらの問題のほかに、特に非晶質磁性合金薄帯は通
常10〜数十μｍの厚さであるため、これを鉄心に成形し
たときの占積率を高めるためには、被膜を極めて薄くす
ることが要望されている。In addition to these problems, the amorphous magnetic alloy ribbon, which is usually 10 to several tens of μm thick, has a very thin coating in order to increase the space factor when it is formed into an iron core. Is required to do so.
（発明が解決しようとする問題点） 本発明は上述した問題点を解決するためになされたも
のであり、磁性合金薄帯の表面に絶縁性、耐食性及び耐
熱性が高く、しかも比較的低温で形成することができる
極めて薄い被膜を容易に形成することができ、磁性合金
薄帯の磁気特性を最大限に発現することができる方法を
提供することを目的とする。(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems, and the surface of the magnetic alloy ribbon has high insulation, corrosion resistance, and heat resistance, and at a relatively low temperature. It is an object of the present invention to provide a method capable of easily forming an extremely thin coating that can be formed and maximizing the magnetic characteristics of a magnetic alloy ribbon.
［発明の構成］ （問題点を解決するための手段） 本発明の磁性合金薄帯の被膜形成方法は、磁性金属薄
帯の少なくとも一方の表面に、水又は有機溶剤を分散剤
としてシリカ又はその水和物を含有し大きさが１〜500n
mであるコロイドのみを分散させたゾルを接触させ、こ
れを乾燥させることにより被膜を形成することを特徴と
するものである。[Structure of the Invention] (Means for Solving Problems) A method for forming a coating film of a magnetic alloy ribbon according to the present invention comprises a silica or its composition using water or an organic solvent as a dispersant on at least one surface of the magnetic metal ribbon. Contains hydrate and size is 1 ~ 500n
It is characterized in that a coating is formed by bringing a sol in which only the colloid of m is dispersed into contact with the sol and drying the sol.
本発明において用いられる磁性合金薄帯としては、例
えば非晶質磁性合金薄帯やパーマロイ薄帯が挙げられ
る。このうち非晶質磁性合金薄帯は、Fe基、Co基、Ni基
のいずれでもよい。また、パーマロイはFe−Ni合金であ
ればいずれでもよいが、高透磁率の鉄心を製造するため
には40〜90％Niの範囲が望ましい。更に、Mo、Co、Si、
Cr、Mn等の添加元素を加えたものでもよい。また、上述
したように非晶質磁性合金薄帯は通常10〜数十μｍの厚
さである。また、パーマロイ薄帯の厚さは例えば0.05〜
5mmである。Examples of the magnetic alloy ribbon used in the present invention include amorphous magnetic alloy ribbons and permalloy ribbons. Of these, the amorphous magnetic alloy ribbon may be Fe-based, Co-based, or Ni-based. Any permalloy may be used as long as it is a Fe-Ni alloy, but a range of 40 to 90% Ni is desirable in order to manufacture an iron core having a high magnetic permeability. Furthermore, Mo, Co, Si,
It is also possible to add additional elements such as Cr and Mn. Further, as described above, the amorphous magnetic alloy ribbon usually has a thickness of 10 to several tens of μm. Further, the thickness of the permalloy ribbon is, for example, 0.05 to
It is 5 mm.
本発明方法において、ゾル中でのシリカ又はその水和
物のコロイドの形状は粒状、棒状、羽毛状等である。こ
れらのコロイドの大きさは１〜500nmであることが望ま
しい。これは、コロイドの大きさが500nmを超えると、
安定なゾルになりにくいためである。特に粒状のコロイ
ドの場合には、その大きさは100nm以下であることが望
ましい。ゾル中のコロイド濃度は0.1〜50重量％の範囲
で任意に選べるが、粒状の場合は30重量％以下、棒状、
羽毛状の場合には10重量％以下にすると、ゾルの粘度を
低くすることができ、薄い被膜を形成するのに好適であ
る。In the method of the present invention, the shape of the colloid of silica or its hydrate in the sol is granular, rod-like, feather-like, or the like. The size of these colloids is preferably 1 to 500 nm. This is because when the colloid size exceeds 500 nm,
This is because it is difficult to form a stable sol. Particularly in the case of granular colloid, the size is preferably 100 nm or less. The concentration of colloid in the sol can be arbitrarily selected in the range of 0.1 to 50% by weight, but in the case of granules it is 30% by weight or less, rod-shaped,
In the case of feathers, if it is 10% by weight or less, the viscosity of the sol can be lowered, which is suitable for forming a thin film.
本発明において、薄帯表面にゾルを接触させる具体的
な方法としては、ゾルを攪拌しならがその中へ薄帯を浸
漬した後引上げる方法、ゾルをスプレー状に薄帯に吹付
ける方法等が挙げられる。このようなゾルが付着した薄
帯は乾燥されるが、乾燥の方法は自然乾燥、風乾、減圧
乾燥等いずれの方法でもよい。また、この乾燥後に加熱
あるいは温風の吹付けを行うことが望ましい。この加熱
温度あるいは吹付けられる温風の温度は100〜350℃であ
ることが望ましい。これは、この温度範囲でも被膜の密
着性を向上させるのに十分であり、かつ薄帯が非晶質合
金であっても脆化や不必要な結晶化等をまねくことがな
く、薄帯の磁気特性が劣化することはない。なお、パー
マロイを用いる場合には更に高温で処理し、被膜の結晶
化を進めることができる。以上のようなゾルの接触及び
乾燥は２回以上繰返してもよい。In the present invention, as a specific method of bringing the sol into contact with the surface of the ribbon, a method of stirring the sol, dipping the ribbon into the sol, and then pulling it up, a method of spraying the sol to the ribbon, and the like Is mentioned. Although the ribbon having such a sol attached thereto is dried, the drying method may be any of natural drying, air drying, reduced pressure drying and the like. Further, it is desirable to heat or blow warm air after this drying. The heating temperature or the temperature of the warm air blown is preferably 100 to 350 ° C. This is sufficient to improve the adhesion of the coating even in this temperature range, and even if the ribbon is an amorphous alloy, it does not lead to brittleness or unnecessary crystallization, The magnetic characteristics do not deteriorate. When permalloy is used, it can be treated at a higher temperature to promote crystallization of the film. The contact and drying of the sol as described above may be repeated twice or more.
このような方法により、薄帯表面において、脱水縮合
反応が起り、ゾルから三次元的な網目構造を有するゲル
化した被膜が形成される。By such a method, a dehydration condensation reaction occurs on the surface of the ribbon, and a gelled film having a three-dimensional network structure is formed from the sol.
（作用） 上述したような本発明方法によれば、磁性合金薄帯の
少なくとも一方の表面に絶縁性、耐食性、耐熱性にも優
れた極めて薄い被膜を形成することができ、鉄心に成形
した場合にも占積率を高めることができ磁性合金薄帯の
磁気特性を最大限に発現させうる。(Operation) According to the method of the present invention as described above, it is possible to form an extremely thin coating excellent in insulation, corrosion resistance, and heat resistance on at least one surface of the magnetic alloy ribbon, Moreover, the space factor can be increased and the magnetic properties of the magnetic alloy ribbon can be maximized.
（実施例） 以下、本発明の実施例を説明する。(Example) Hereinafter, the Example of this invention is described.
実施例１、２ まず、本発明に係る非晶質磁性合金薄帯を作製するた
めの装置例を第１図を参照して説明する。第１図におい
て、例えば磁性合金薄帯１は支持ロール２、２に支持さ
れてゾル３に浸漬された後、温風４を吹きつけることに
より乾燥され、更に電気炉５内で加熱される。ここまで
の段階で、両面に被膜が形成された磁性合金薄帯１′が
作製される。次いで、この磁性合金薄帯１′は支持ロー
ル６に支持され、巻取ドラム７に巻取られ、巻鉄心を構
成する。Examples 1 and 2 First, an example of an apparatus for producing an amorphous magnetic alloy ribbon according to the present invention will be described with reference to FIG. In FIG. 1, for example, the magnetic alloy ribbon 1 is supported by the support rolls 2 and 2, immersed in the sol 3, dried by blowing hot air 4, and further heated in the electric furnace 5. By the steps up to this point, the magnetic alloy ribbon 1 ′ having coatings on both sides is produced. Next, this magnetic alloy ribbon 1'is supported by a support roll 6 and wound on a winding drum 7 to form a winding iron core.
メタノールを分散剤として10〜20nmの粒状シリカを10
重量％含有するゾルを調整し、 Fe80Ni2B12Si5.5C0.5 なる組成を有する板厚30μｍの非晶質磁性合金薄帯（実
施例１）及び板厚0.35mmのPC級パーマロイ薄帯（実施例
２）の片面に前記ゾルをスプレーした後、それぞれ150
℃（実施例１）及び200℃（実施例２）で30分間乾燥し
て被膜を形成した。10 ~ 20 nm granular silica with methanol as a dispersant
An amorphous magnetic alloy ribbon having a composition of Fe 80 Ni 2 B 12 Si 5.5 C 0.5 having a thickness of 30 μm (Example 1) and a PC-grade permalloy ribbon having a thickness of 0.35 mm are prepared by adjusting the sol contained in a weight percentage. After spraying the sol on one side of (Example 2),
A coating was formed by drying at 30 ° C. (Example 1) and 200 ° C. (Example 2) for 30 minutes.
実施例１、２の薄帯の層間絶縁抵抗値は、15Ωcm2／
枚以上（実施例１）及び10Ωcm2／枚（実施例２）と十
分高い値を示した。また、実施例３の非晶質磁性合金薄
帯は磁気特性を向上させるために磁場中、420℃で焼鈍
した後にも、絶縁性が劣化はすることはなかった。The interlayer insulation resistance values of the thin strips of Examples 1 and 2 are 15 Ωcm 2 /
The values were sufficiently high, at least 1 sheet (Example 1) and 10 Ωcm 2 / sheet (Example 2). Further, the amorphous magnetic alloy ribbon of Example 3 did not deteriorate in insulating property even after being annealed at 420 ° C. in a magnetic field in order to improve magnetic properties.
［発明の効果］ 以上詳述したように本発明方法によれば、磁性合金薄
帯の少なくとも一方の表面に絶縁性、耐食性、耐熱性に
優れた極めて薄い被膜を形成することができ、鉄心に成
形した場合にも占積率を高めることができ磁性合金薄帯
の磁気特性を最大限に発現させうる。また、被膜形成が
容易で、薄帯の磁気特性を低下させるような高温も必要
ないので、工業化という点でも極めて価値が高いもので
ある。[Effects of the Invention] As described in detail above, according to the method of the present invention, it is possible to form an extremely thin coating having excellent insulation, corrosion resistance, and heat resistance on at least one surface of a magnetic alloy ribbon, and to form an iron core. Even when molded, the space factor can be increased and the magnetic properties of the magnetic alloy ribbon can be maximized. Further, it is very valuable in terms of industrialization because it is easy to form a film and does not require a high temperature that deteriorates the magnetic properties of the ribbon.
第１図は本発明方法を実施するための装置の構成図であ
る。 １、１′……磁性合金薄帯、２、６……支持ロール、３
……ゾル、４……温風、５……電気炉、７……巻取ドラ
ム。FIG. 1 is a block diagram of an apparatus for carrying out the method of the present invention. 1, 1 '... Magnetic alloy ribbon, 2, 6 ... Support roll, 3
...... Sol, 4 ... warm air, 5 ... electric furnace, 7 ... winding drum.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−31598（ＪＰ，Ａ) 特公 昭33−454（ＪＰ，Ｂ１) 特公 昭46−19526（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-54-31598 (JP, A) JP-B-33-454 (JP, B1) JP-B-46-19526 (JP, B1)
Claims (1)
水又は有機溶剤を分散剤としてシリカ又はその水和物を
含有し大きさが１〜500nmであるコロイドのみを分散さ
せたゾルを接触させ、これを乾燥させることにより被膜
を形成することを特徴とする磁性合金薄帯の被膜形成方
法。1. A magnetic metal ribbon on at least one surface,
Characterized in that a coating is formed by contacting a sol containing only a colloid having a size of 1 to 500 nm and containing silica or a hydrate thereof with water or an organic solvent as a dispersant, and drying the sol. A method for forming a film on a magnetic alloy ribbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256233A JPH0810651B2 (en) | 1986-10-28 | 1986-10-28 | Magnetic alloy ribbon coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256233A JPH0810651B2 (en) | 1986-10-28 | 1986-10-28 | Magnetic alloy ribbon coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63110606A JPS63110606A (en) | 1988-05-16 |
| JPH0810651B2 true JPH0810651B2 (en) | 1996-01-31 |
Family
ID=17289782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61256233A Expired - Fee Related JPH0810651B2 (en) | 1986-10-28 | 1986-10-28 | Magnetic alloy ribbon coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810651B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2545098B2 (en) * | 1987-10-09 | 1996-10-16 | 三井石油化学工業株式会社 | Method for manufacturing saturable inductor |
| US20120315496A1 (en) * | 2011-06-07 | 2012-12-13 | General Electric Company | Method of forming an oxide coating that reduces accumulation of radioactive species on a metallic surface |
| US20160005499A1 (en) * | 2014-07-03 | 2016-01-07 | Ge Nuclear Energy | Methods of coating a nuclear reactor component with a colloidal solution |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431598A (en) * | 1977-08-15 | 1979-03-08 | Nippon Steel Corp | Steel plate for electromagnet which has heat reistant property and anti-stain film and its surface traeting method |
-
1986
- 1986-10-28 JP JP61256233A patent/JPH0810651B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63110606A (en) | 1988-05-16 |
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