JPS5957405A - Demagnetization method - Google Patents
Demagnetization methodInfo
- Publication number
- JPS5957405A JPS5957405A JP16751782A JP16751782A JPS5957405A JP S5957405 A JPS5957405 A JP S5957405A JP 16751782 A JP16751782 A JP 16751782A JP 16751782 A JP16751782 A JP 16751782A JP S5957405 A JPS5957405 A JP S5957405A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic material
- curie temperature
- shield case
- temperature
- 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
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【発明の詳細な説明】 （１）発明の技術分野 本発明は磁性体の消磁方法、特に熱消磁方法に係る。[Detailed description of the invention] (1) Technical field of the invention The present invention relates to a method of demagnetizing a magnetic material, particularly a method of thermal demagnetization.
（２）従来技術と問題点
磁性体の磁化を消す消磁方法には、磁性体に交流減衰磁
界を印加して消磁する交流消磁法と。(2) Prior art and problems The demagnetization method for demagnetizing a magnetic material includes the AC demagnetization method, which demagnetizes the magnetic material by applying an AC attenuation magnetic field.
磁性体をキュリ一温度Ｔｃより高い温度に加熱して消磁
する熱消磁法とがある。しかし、いずｎの方法において
も、消磁後に０．３〜０．４０ｅ程度の地磁気中にさら
さｎるので、特に、磁場に敏感な軟質磁性材料などでは
、再び磁化さ７Ｌるという不都合がある。There is a thermal demagnetization method in which a magnetic material is heated to a temperature higher than the Curie temperature Tc to demagnetize it. However, even in the above method, since it is exposed to earth's magnetic field of about 0.3 to 0.40 e after demagnetization, there is a disadvantage that especially soft magnetic materials that are sensitive to magnetic fields may become magnetized again. .
（３）発明の目的
そこで１本発明は５以上の如き従来技術に鑑み、地磁気
などの微弱な外部（へ（界による影響を回避した６ｎ性
体の消磁方法を提供することを目的とする。(3) Purpose of the Invention In view of the above-mentioned prior art, it is an object of the present invention to provide a method for demagnetizing a 6n material that avoids the influence of weak external (fields) such as terrestrial magnetism.
（４）発明の構成
そして、本発明は、上記目的？：達成するために、磁性
体をそのキュリ一温度より高いキュリ一温度を持つ（逃
気シールドケースに入れ、そしてそれを磁性体のキュリ
一温度より高くかつ磁気シールドケースのキュリ一温度
より低い温度に加熱することを特徴とする。(4) Structure of the invention And is the present invention intended for the above-mentioned purpose? : To achieve this, put a magnetic material into an escape-shielded case with a Curie temperature higher than its Curie temperature, and place it at a temperature higher than the Curie temperature of the magnetic material and lower than the Curie temperature of the magnetic shielding case. It is characterized by being heated to.
即ち１本発明の方法においては、磁性体を熱消磁する際
、磁性体を収納している１１歳気シールドケースが外部
磁界のＵＢａ体への作用を遮断するので。That is, in the method of the present invention, when the magnetic material is thermally demagnetized, the magnetic shield case housing the magnetic material blocks the effect of an external magnetic field on the UBa material.
消磁後の外部磁界の作用が回避さｎる。ただし。The effects of external magnetic fields after demagnetization are avoided. however.
磁気シールドケースは磁性材料（好ましくは軟質磁性材
料）からなることによって磁気７−ルドをなすものであ
るから、磁性体を消磁するための熱で同時に消磁さして
はならない。従って、そのキュリ一温度は消磁温度、結
局、消磁される磁性体のキーリ一温度より高いものでな
け扛ばならないことになる。、磁気シールド材料として
は１例えば。Since the magnetic shield case is made of a magnetic material (preferably a soft magnetic material) and forms a magnetic field, it must not be simultaneously demagnetized by the heat used to demagnetize the magnetic material. Therefore, the Curie temperature must be higher than the demagnetization temperature, which is ultimately higher than the Curie temperature of the magnetic material to be demagnetized. For example, one example is a magnetic shielding material.
軟質磁性月利としてパーマロイ（キュリ一温度約４００
〜５００℃）、高いキュリ一温度の両性材料という観点
からＦｅ−０Ｇ合金（組成；Ｆｅ約７０ωｔチ＋００約
３０ωを凱キュリ一温度：９９０℃）などを使用すると
よい。Permalloy (curi temperature approx. 400
~500°C), and from the viewpoint of being an amphoteric material with a high Curie temperature, it is preferable to use Fe-0G alloy (composition: Fe about 70ωt + 00 about 30ω, Curie temperature: 990°C).
（５）発明の実施例 第１図は本発明の一実施例を説明するための図である。(5) Examples of the invention FIG. 1 is a diagram for explaining one embodiment of the present invention.
電気炉１の中に、消磁しようとする磁性体２を入２’ｔ
た磁気シールドケース３を置いて。Put the magnetic material 2 to be demagnetized into the electric furnace 1.
Place the magnetic shield case 3.
磁性体のキュリ一温度より高い温度に加熱する。Heat to a temperature higher than the Curie temperature of the magnetic material.
図中、４．５は台である。本実施例では磁気シールドケ
ース３を前述のＦｅ−０Ｇ合金で円筒状に作製して用い
た。消磁する磁性体としてパーマロイを用い、そのキー
リ一温度（約４２０℃）より高い５００℃の温度で２０
〜３０分間処理し、第２図に示すように、消磁した磁性
体２°の表面の磁束密度をホール素子６を用いて測定し
た。（ｉ長性体試料２１０寸法は１ ｃｍ ｘ ５ ｔ
ｙｈ Ｘ ２ ｍｍであり、その横方向（１偲幅方向）
の座標（図中のＸで示した方向の座標）に関して測定し
た磁束密度全第３図に示す。第３図に、磁気シールドケ
ース３なしで、その他は上記の実施例と同じ処理を行な
った結果を。In the figure, 4.5 is a stand. In this example, the magnetic shield case 3 was made of the aforementioned Fe-0G alloy and had a cylindrical shape. Permalloy is used as the magnetic material to be demagnetized, and at a temperature of 500°C, which is higher than its temperature (approximately 420°C),
After processing for ~30 minutes, the magnetic flux density on the surface of the demagnetized magnetic material 2° was measured using a Hall element 6, as shown in FIG. (The dimensions of the i-long body sample 210 are 1 cm x 5 t.
yh
The magnetic flux densities measured with respect to the coordinates (coordinates in the direction indicated by X in the figure) are all shown in FIG. FIG. 3 shows the results obtained by performing the same processing as in the above embodiment except without the magnetic shield case 3.
比較のために示した。熱油ｒｉｎ後、磁性体表面の中心
付近で、磁気シールドなしの場合には磁束密度８．５Ｇ
が得られたのに対し、磁気シールドを行なうと１．４Ｇ
の磁束密度になり、約６分の１以下の値になっているこ
とがわかる。Shown for comparison. After rinsing with hot oil, the magnetic flux density is 8.5G near the center of the magnetic material surface without magnetic shielding.
was obtained, whereas with magnetic shielding, 1.4G was obtained.
It can be seen that the magnetic flux density is about 1/6 or less.
（６）発明の効果
以上の説明から明らかなように１本発明に依り、地磁気
等の外部磁場の影響を避けてｆｌＲ性体を消磁すること
が可能になる。(6) Effects of the Invention As is clear from the above description, according to the present invention, it is possible to demagnetize an flR material while avoiding the influence of external magnetic fields such as terrestrial magnetism.
第１図は本発明の方法を実施する装置の概略図。
第２図は消磁した磁性体表面の（磁束密度の測定方法を
説明する図、
第３図は本発明及び従来の方法で消磁した磁性体表面の
磁束密度を示すグラフである。
１・・・炉、２．２′・・・磁性体、３・・・磁気シー
ルドケース、６・・・ホール素子。
特〆［出願人
富士通株式会社
特許出願代哩人
弁理士 青 木 朗
弁理士 西 舘 和 之
弁理士 内 １） 幸 男
弁理士 山 口 昭 之FIG. 1 is a schematic diagram of an apparatus for carrying out the method of the invention. Fig. 2 is a diagram illustrating a method for measuring the magnetic flux density on the surface of a demagnetized magnetic material, and Fig. 3 is a graph showing the magnetic flux density on the surface of a magnetic material demagnetized by the present invention and the conventional method.1... Furnace, 2.2'...Magnetic material, 3...Magnetic shielding case, 6...Hall element. Special [Applicant: Fujitsu Limited, patent attorney Akira Aoki, patent attorney Kazu Nishidate Patent Attorney 1) Yukio Patent Attorney Akira Yamaguchi
Claims (1)
一温度を持つ磁気ノールドヶースに入れ。 そ扛を該（直性体のキュリ一温度より高くかつ該磁気シ
ールドク°−スのキュリ一温度より低い温度に加熱する
ことを特徴とする消磁方法。[Claims] 1. A magnetic material is placed in a magnetic nord case having a Curie temperature higher than the Curie temperature of the Oa magnetic material. A degaussing method characterized by heating the magnet to a temperature higher than the Curie temperature of the straight body and lower than the Curie temperature of the magnetic shielding case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16751782A JPS5957405A (en) | 1982-09-28 | 1982-09-28 | Demagnetization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16751782A JPS5957405A (en) | 1982-09-28 | 1982-09-28 | Demagnetization method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5957405A true JPS5957405A (en) | 1984-04-03 |
Family
ID=15851151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16751782A Pending JPS5957405A (en) | 1982-09-28 | 1982-09-28 | Demagnetization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5957405A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243707A (en) * | 1988-08-04 | 1990-02-14 | Tokin Corp | Method of demagnetization |
| JP2012134244A (en) * | 2010-12-20 | 2012-07-12 | Kobe Steel Ltd | Manufacturing method of dust core, and dust core obtained by the same |
| WO2013182361A1 (en) * | 2012-06-08 | 2013-12-12 | Robert Bosch Gmbh | Thermoelectric element for converting energy between thermal energy and electrical energy and method for disassembling the thermoelectric element |
| JP2019036633A (en) * | 2017-08-15 | 2019-03-07 | 株式会社Ｖｉｃインターナショナル | Magnetic shield fabric, method of manufacturing, and method of magnetic shielding of electronic equipment |
| CN109741902A (en) * | 2019-01-08 | 2019-05-10 | 苏州腾凯金属材料有限公司 | A kind of demagnetizing method of solenoid valve |
-
1982
- 1982-09-28 JP JP16751782A patent/JPS5957405A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243707A (en) * | 1988-08-04 | 1990-02-14 | Tokin Corp | Method of demagnetization |
| JP2012134244A (en) * | 2010-12-20 | 2012-07-12 | Kobe Steel Ltd | Manufacturing method of dust core, and dust core obtained by the same |
| WO2013182361A1 (en) * | 2012-06-08 | 2013-12-12 | Robert Bosch Gmbh | Thermoelectric element for converting energy between thermal energy and electrical energy and method for disassembling the thermoelectric element |
| JP2019036633A (en) * | 2017-08-15 | 2019-03-07 | 株式会社Ｖｉｃインターナショナル | Magnetic shield fabric, method of manufacturing, and method of magnetic shielding of electronic equipment |
| CN109741902A (en) * | 2019-01-08 | 2019-05-10 | 苏州腾凯金属材料有限公司 | A kind of demagnetizing method of solenoid valve |
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