JPH06275418A - Magnetic shielding powder - Google Patents
Magnetic shielding powderInfo
- Publication number
- JPH06275418A JPH06275418A JP5085514A JP8551493A JPH06275418A JP H06275418 A JPH06275418 A JP H06275418A JP 5085514 A JP5085514 A JP 5085514A JP 8551493 A JP8551493 A JP 8551493A JP H06275418 A JPH06275418 A JP H06275418A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic shield
- magnetic
- shield
- particle size
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims abstract description 56
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 16
- 238000009826 distribution Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910017060 Fe Cr Inorganic materials 0.000 description 4
- 229910002544 Fe-Cr Inorganic materials 0.000 description 4
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- -1 wires Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、塗料とともに塗布し
て磁気を遮蔽するために用いる軟磁性体からなる鱗片状
の磁気シールド用粉末に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scale-like magnetic shield powder made of a soft magnetic material which is applied together with a paint to shield magnetism.
【０００２】[0002]
【従来の技術】最近の磁気記録装置、電子機器などは、
高密度化、小型化が進につれて外部磁場の影響を受けや
すくなってきており、同時に磁場発生源として周辺機器
に悪影響を与える可能性も高い。これら装置の保護およ
び外部への磁場の漏洩を防止するために磁気シールドを
設ける場合が増えている。磁気シールド材としては、
板、箔、線、繊維など種々の形状のものが使用されてい
るが、鱗片状の軟磁性体粉末を塗布する方法が提案され
ている（特開昭５８−５９２６８号公報参照）。2. Description of the Related Art Recent magnetic recording devices, electronic devices, etc.
As the density and the size of the device have become smaller, they are more likely to be affected by an external magnetic field, and at the same time, it is highly possible that the peripheral device will be adversely affected as a magnetic field generation source. In many cases, a magnetic shield is provided to protect these devices and prevent the magnetic field from leaking to the outside. As a magnetic shield material,
Although various shapes such as plates, foils, wires, and fibers are used, a method of applying flaky soft magnetic powder has been proposed (see JP-A-58-59268).
【０００３】この方法は、鱗片状の軟磁性体粉末を含む
塗料を塗布するだけで粉末が配向し、薄いシールド層が
得られるので小型軽量化に適している。このための鱗片
状軟磁性体粉末の材料は、フェライトなどの酸化物、パ
ーマロイ、センダストなどが知られているが、近年、ア
モルファス合金も用いられるようになってきた。This method is suitable for downsizing and weight reduction because the powder is oriented and a thin shield layer can be obtained only by applying a coating material containing a flaky soft magnetic powder. For the material of the flaky soft magnetic powder for this purpose, oxides such as ferrite, permalloy, sendust, etc. are known, but in recent years, amorphous alloys have also been used.
【０００４】例えば、特開昭５９−２０１４９３号公報
には、鉄族金属のうち一種以上、あるいはこれと他の遷
移金属の一種以上：６５〜９０原子％と、ガラス化元
素：１０〜３５原子％からなるアモルファス合金薄板を
切断またはスリットして所定の寸法とし、必要に応じて
熱処理することにより製造される鱗片状磁気シールド用
アモルファス合金粉末が記載されており、また、特開平
１−１８４２０２号公報には、厚さ：０．１〜１０μ
ｍ、長さ：１〜５０μｍでアスペクト比（長さ／厚さ）
が３〜１００の鱗片状磁気シールド用アモルファス合金
粉末が記載されており、さらに、これら鱗片状磁気シー
ルド用アモルファス合金粉末の平均厚さを０．０１〜１
μｍと一層薄く、アスペクト比（平均外径／平均厚さ）
を１０〜１００００と一層大きくして磁気シールド粉末
としての特性を向上せしめた鱗片状磁気シールド用アモ
ルファス合金粉末が特開平１−１３９７０２号公報およ
び特開平１−２０５４０４号公報に記載されている。For example, in JP-A-59-201493, one or more iron group metals or one or more of these and other transition metals: 65 to 90 atom%, vitrifying element: 10 to 35 atoms. The amorphous alloy powder for flaky magnetic shields, which is produced by cutting or slitting an amorphous alloy thin plate composed of 10% to a predetermined size, and heat-treating as required, is also described, and JP-A-1-184202. In the publication, thickness: 0.1 to 10 μ
m, length: 1 to 50 μm, aspect ratio (length / thickness)
3 to 100, the amorphous alloy powder for scale-like magnetic shield is described, and the average thickness of the amorphous alloy powder for scale-like magnetic shield is 0.01 to 1
μm, thinner, aspect ratio (average outer diameter / average thickness)
Is further increased to 10 to 10,000 to improve the properties of the magnetic shield powder, and amorphous alloy powder for flaky magnetic shield is disclosed in JP-A-1-139702 and JP-A-1-205404.
【０００５】しかし、フェライトなどの酸化物粉末は脆
いために鱗片状になりにくく、パーマロイは高価である
とともに鱗片状化に要する時間が長くてコストがかか
り、センダストは耐蝕性が低く、鱗片状化すると比表面
積が大きくなって発火しやすくなり取扱い上問題があ
る。さらにアモルファス合金鱗片状粉末は超急冷工程お
よび粉砕工程の少なくとも２工程を必要とし、しかも量
産化に限界があるなどの問題点があった。However, oxide powders such as ferrite are brittle and are unlikely to form flakes, and permalloy is expensive and the time required for flake formation is long and costly. Sendust has low corrosion resistance and flake formation. Then, the specific surface area becomes large and it is easy to catch fire, which is a problem in handling. Further, the amorphous alloy flaky powder has a problem that it requires at least two steps of an ultra-quenching step and a pulverizing step, and has a limit in mass production.
【０００６】そのため、最近は、大量に使用される鱗片
状磁気シールド粉末として比較的安価なＦｅ−Ｃｒ系合
金粉末が用いられるようになり、例えば、特開平１−２
２３６２７号公報には、Ｃｒ：０．５〜２０重量％、Ｓ
ｉ：０．５〜９重量％、Ａｌ：０．５〜１５重量％を含
有し、残部：Ｆｅおよび不可避不純物からなる成分組成
を有することを特徴とする磁気シールド用粉末が記載さ
れており、また特開平３−２９５２０６号公報には、Ｓ
ｉ：１８〜３０原子％、Ｃｒ：１９原子％以下を含有
し、残部：Ｆｅおよび不可避不純物からなる成分組成を
有し、平均厚さｄ：１μｍ以下、粒度分布計によって求
められた粒径の小さい方から重量を累計して５０％にな
ったときの粒径Ｄ50が５〜３０μｍであり、アスペクト
比（Ｄ50／ｄ）：１０〜３０００であるＦｅ−Ｃｒ系合
金鱗片状磁気シールド粉末が記載されており、特に前記
特開平３−２９５２０６号公報記載のＦｅ−Ｃｒ系合金
からなる鱗片状磁気シールド粉末は、価格が安く、耐蝕
性および磁気シールド性にも優れているので注目されて
いる。Therefore, recently, a relatively inexpensive Fe--Cr alloy powder has been used as a scale-like magnetic shield powder that is used in a large amount.
No. 23627, Cr: 0.5 to 20% by weight, S
i: 0.5 to 9% by weight, Al: 0.5 to 15% by weight, the balance: Fe and an unavoidable impurity, and a magnetic shield powder characterized by the following composition: Further, in Japanese Patent Laid-Open No. 3-295206, S
i: 18 to 30 atomic%, Cr: 19 atomic% or less, and the balance: Fe and an unavoidable impurity component composition, and an average thickness d: 1 μm or less, of a particle size determined by a particle size distribution meter. Fe-Cr-based alloy flaky magnetic shield powder having a particle size D 50 of 5 to 30 μm and an aspect ratio (D 50 / d) of 10 to 3,000 when the total weight from the smaller one reaches 50%. In particular, the scale-like magnetic shield powder composed of the Fe—Cr alloy described in JP-A-3-295206 is noted for its low price and excellent corrosion resistance and magnetic shield property. There is.
【０００７】[0007]
【発明が解決しようとする課題】しかし、従来よりも安
価でしかも磁気シールド性能の優れた磁気シールド粉末
は常に求められており、従来のＦｅ−Ｃｒ系合金鱗片状
磁気シールド粉末の磁気シールド性能の一層の改善が求
められていた。However, there is always a demand for a magnetic shield powder which is cheaper than the conventional one and has excellent magnetic shield performance, and the magnetic shield performance of the conventional Fe-Cr alloy scale flaky magnetic shield powder is not improved. Further improvement was required.
【０００８】[0008]
【課題を解決するための手段】そこで、本発明者らは、
従来よりも磁気シールド性能が高くかつ保磁力が低い磁
気シールド特性に優れたＦｅ−Ｃｒ系合金鱗片状磁気シ
ールド粉末を開発すべく研究を行った結果、平均厚さ
ｄ：０．０２〜０．６μｍ、粒度分布計によって求めら
れた粒径の小さい方から重量を累計して５０％になった
ときの粒径をＤ50とすると、Ｄ50：１０〜４０μｍであ
り、アスペクト比（Ｄ50／ｄ）：２０〜５００である磁
気シールド用粉末において、ＭをＡｌまたはＳｉのうち
の１種または２種とすると、原子％で、Ｍ：１５〜３０
％、Ｃｒ：３〜１５％、Ｃ：０．５〜３％、残部：Ｆｅ
および不可避不純物からなる成分組成を有する磁気シー
ルド用粉末は、従来よりも磁気シールド性能が向上する
という研究結果が得られたのである。Therefore, the present inventors have
As a result of research to develop Fe—Cr alloy scale flaky magnetic shield powder having magnetic shield performance higher than conventional magnetic coercive force and excellent magnetic shield characteristics, an average thickness d: 0.02 to 0. 6 [mu] m, when the D 50 particle size when it becomes 50% by total weight from the smaller particle size obtained by the particle size distribution meter, D 50: a 10 to 40 [mu] m, an aspect ratio (D 50 / d): 20-500, when M is one or two of Al or Si, M: 15-30 in atomic%
%, Cr: 3 to 15%, C: 0.5 to 3%, balance: Fe
The result of research has been obtained that the magnetic shield powder having a component composition consisting of unavoidable impurities has improved magnetic shield performance as compared with conventional powders.
【０００９】この発明は、かかる研究結果にもとずいて
なされたものであって、平均厚さｄ：０．０２〜０．６
μｍ、Ｄ50：１０〜４０μｍであり、アスペクト比（Ｄ
50／ｄ）：２０〜５００である磁気シールド用粉末にお
いて、原子％で、Ｍ：１５〜３０％、Ｃｒ：３〜１５
％、Ｃ：０．５〜３％、残部：Ｆｅおよび不可避不純物
からなる成分組成を有する磁気シールド用粉末に特徴を
有するものである。The present invention was made based on the results of such research, and has an average thickness d: 0.02 to 0.6.
μm, D 50 : 10 to 40 μm, and the aspect ratio (D
50 / d): 20-500, for magnetic shielding powder, atomic% M: 15-30%, Cr: 3-15
%, C: 0.5 to 3%, the balance: Fe and a magnetic shield powder having a composition of inevitable impurities.
【００１０】以下にこの磁気シールド用粉末の成分組
成、平均厚さｄ、Ｄ50、アスペクト比（Ｄ50／ｄ）を上
記の如く限定した理由について説明する （ａ） Ｍ（ＡｌまたはＳｉのうちの１種または２種） Ｍの含有量が１５原子％未満では保磁力（Ｈc ）が高く
なり過ぎるとともに磁気シールド性能も低下するので好
ましくなく、一方、３０原子％を越えて含有すると、粉
末の飽和磁化が下がるので十分な磁気シールド性能が得
られない。したがって、Ｍの含有量は１５〜３０原子％
に定めた。The reasons why the component composition, the average thickness d, D 50 and the aspect ratio (D 50 / d) of the magnetic shield powder are limited as described above will be described below. (A) M (Al or Si) If the content of M is less than 15 atomic%, the coercive force (H c ) will be too high and the magnetic shielding performance will be deteriorated, which is not preferable. Since the saturation magnetization of is decreased, sufficient magnetic shield performance cannot be obtained. Therefore, the content of M is 15 to 30 atomic%.
Stipulated in.
【００１１】（ｂ） Ｃｒ Ｃｒの含有量は３原子％未満であると耐蝕性が低下し、
錆の発生や変色が起きやすくなるので好ましくなく、一
方、１５原子％を越えて含有すると、粉末の飽和磁化が
下がるので十分な磁気シールド性能が得られない。した
がって、Ｃｒの含有量は３〜１５原子％に定めた。(B) Cr If the Cr content is less than 3 atomic%, the corrosion resistance decreases,
Rust generation and discoloration are likely to occur, which is not preferable. On the other hand, when the content exceeds 15 atom%, the saturation magnetization of the powder is lowered, and sufficient magnetic shield performance cannot be obtained. Therefore, the content of Cr is set to 3 to 15 atom%.
【００１２】（ｃ） Ｃ Ｃは、熱処理効果を高め、磁気シールド性能を向上させ
る作用を有するが、その含有量が、０．５原子％未満で
は十分な磁気シールド性能向上効果が得られず、一方、
３原子％を越えて含有すると、保磁力（Ｈc ）が高くな
り過ぎるとともに粉砕に際して粉末の燐片状化が困難に
なるので好ましくない。したがって、Ｃの含有量は０．
５〜３原子％に定めた。(C) C C has an effect of enhancing the heat treatment effect and improving the magnetic shield performance, but if the content thereof is less than 0.5 atomic%, a sufficient magnetic shield performance improving effect cannot be obtained. on the other hand,
If the content exceeds 3 atomic%, the coercive force (H c ) becomes too high, and it becomes difficult to form the scaly powder when pulverizing. Therefore, the content of C is 0.
It is set to 5 to 3 atom%.
【００１３】（ｄ） 平均厚さｄ 磁気シールド用粉末の平均厚さｄを小さくするほど磁気
シールド特性を向上させることができるが、０．０２μ
ｍ未満にすると圧延粉砕による応力歪みのために保磁力
が大きくなり、一方、平均厚さｄが０．６μｍを越える
と、塗膜中に含まれる粉末の枚数が少なくなり、いずれ
の場合も磁気シールド効果が低下するので好ましくな
い。したがって、磁気シールド用粉末の平均厚さｄは、
０．０２〜０．６μｍに定めた。(D) Average Thickness d The smaller the average thickness d of the magnetic shield powder, the more the magnetic shield characteristics can be improved.
If it is less than m, the coercive force increases due to stress strain due to rolling and pulverization, while if the average thickness d exceeds 0.6 μm, the number of powder particles contained in the coating film decreases, and in any case It is not preferable because the shield effect is reduced. Therefore, the average thickness d of the magnetic shielding powder is
It was set to 0.02 to 0.6 μm.
【００１４】（ｅ） Ｄ50 粒度分布計によって求められた粒径を、粒径の小さい方
から重量を累計して５０％になったときの粒径Ｄ50を、
１０μｍ未満まで小さくすると、表面積が増えるため粉
末間の空隙に存在する有機バインダーの量が多くなり、
アスペクト比の大きい粉末の割合いが減るために磁気シ
ールド効果が低下するので好ましくない。一方、Ｄ50が
４０μｍを越えると、有機バインダー中での分散性が悪
くなり、塗布時にむらを生じ均一な塗膜が得られないの
で好ましくない。したがって、Ｄ50：１０〜４０μｍと
定めた。[0014] The particle size D 50 when the particle size obtained by the 50 particle size analyzer (e) D, was 50% by total weight from the smaller particle size,
When it is reduced to less than 10 μm, the surface area increases, so that the amount of the organic binder present in the voids between the powders increases,
Since the ratio of powder having a large aspect ratio is reduced, the magnetic shield effect is deteriorated, which is not preferable. On the other hand, when D 50 exceeds 40 μm, the dispersibility in the organic binder is deteriorated, unevenness occurs during coating, and a uniform coating film cannot be obtained, which is not preferable. Therefore, D 50 was set to 10 to 40 μm.
【００１５】（ｆ） アスペクト比（Ｄ50／ｄ） アスペクト比が２０未満であると、粉末の接触面積は減
り、磁気抵抗は増加するので好ましくなく、一方、アス
ペクト比が、５００を越えると歪みによる保磁力が増加
し、かつ粒径の大きな粉末が混入するため均一な塗膜を
得ることが難しくなる。したがって、アスペクト比は、
２０〜５００に定めた。(F) Aspect ratio (D 50 / d) When the aspect ratio is less than 20, it is not preferable because the contact area of the powder is reduced and the magnetic resistance is increased. On the other hand, when the aspect ratio exceeds 500, distortion occurs. As a result, the coercive force is increased and powder having a large particle size is mixed, so that it becomes difficult to obtain a uniform coating film. Therefore, the aspect ratio is
It was set to 20-500.
【００１６】[0016]
【実施例】合金原料を高周波溶解して表１〜表３に示さ
れる成分組成のインゴットを作製し、これらインゴット
を粗粉砕した後、分級処理を行って最大粒径：５０μｍ
に揃えた。この粗粉末をさらに湿式アトライターボール
ミルにて鱗片状化し、表１〜表３に示される、Ｄ50、ｄ
およびアスペクト比（Ｄ50／ｄ）を有する本発明磁気シ
ールド用粉末１〜２０、比較磁気シールド用粉末１〜８
および従来磁気シールド用粉末１〜２を作製した。[Examples] Alloy raw materials were subjected to high frequency melting to prepare ingots having the component compositions shown in Tables 1 to 3, and these ingots were coarsely crushed and then classified to perform a maximum particle size: 50 μm.
Aligned to. This coarse powder was further scaled by a wet attritor ball mill, and D 50 , d shown in Tables 1 to 3 were obtained.
And powders 1 to 20 for magnetic shield of the present invention having an aspect ratio (D 50 / d), and powders 1 to 8 for comparative magnetic shield.
And the powders 1 and 2 for the conventional magnetic shield were produced.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【表３】 [Table 3]
【００２０】これら本発明磁気シールド用粉末１〜２
０、比較磁気シールド用粉末１〜８および従来磁気シー
ルド用粉末１〜２を、熱処理炉に入れ、１．０×１０-2
Ｔｏｒｒの真空に排気した後、Ａｒガスを導入してＡｒ
ガス雰囲気に保持し、このＡｒガス雰囲気中にて表４〜
表６に示される温度で熱処理し、熱処理された本発明磁
気シールド用粉末１〜２０、比較磁気シールド用粉末１
〜８および従来磁気シールド用粉末１〜２の保磁力（Ｈ
c ）を測定し、それらの測定値を表４〜表６に示した。These magnetic shield powders 1 to 2 of the present invention
0, the comparative magnetic shield powders 1 to 8 and the conventional magnetic shield powders 1 and 2 were put into a heat treatment furnace and 1.0 × 10 -2
After evacuating to a vacuum of Torr, introducing Ar gas, Ar
It is kept in a gas atmosphere, and in this Ar gas atmosphere,
The magnetic shield powders 1 to 20 of the present invention, which were heat-treated at the temperatures shown in Table 6, and the comparative magnetic shield powder 1 were heat-treated.
~ 8 and the coercive force (H
c ) was measured, and those measured values are shown in Tables 4 to 6.
【００２１】さらに、前記熱処理された本発明磁気シー
ルド用粉末１〜２０、比較磁気シールド用粉末１〜８お
よび従来磁気シールド用粉末１〜２をそれぞれ有機バイ
ンダー（エポキシ樹脂）と３：１の割合で混合し、厚
さ：２ｍｍの板に成形し、磁気シールド板を作製した。
この磁気シールド板をフェライト磁石上に設置し、磁気
シールド板から１ｃｍの位置での磁束密度Ｂを測定し、
これと磁気シールド板がない場合の磁束密度Ｂ0 を測定
し、シールド比（Ｂ／Ｂ0 ）を算出し、これらの結果を
表４〜表６に示した。Further, the heat-treated magnetic shield powders 1 to 20 of the present invention, the comparative magnetic shield powders 1 to 8 and the conventional magnetic shield powders 1 and 2 are respectively mixed with an organic binder (epoxy resin) in a ratio of 3: 1. Were mixed and molded into a plate having a thickness of 2 mm to prepare a magnetic shield plate.
This magnetic shield plate is installed on the ferrite magnet, and the magnetic flux density B at a position 1 cm from the magnetic shield plate is measured.
The magnetic flux density B 0 without this and the magnetic shield plate was measured, the shield ratio (B / B 0 ) was calculated, and these results are shown in Tables 4 to 6.
【００２２】[0022]
【表４】 [Table 4]
【００２３】[0023]
【表５】 [Table 5]
【００２４】[0024]
【表６】 [Table 6]
【００２５】表１〜表６に示される結果から、Ｃを０．
５〜３原子％を含む本発明磁気シールド用粉末１〜２０
で作製した磁気シールド板を設置したときシールド比：
Ｂ／Ｂ0 は、Ｃを含まない従来磁気シールド用粉末１〜
２で作製した磁気シールド板を設置したときのシールド
比：Ｂ／Ｂ0 に比べて格段に小さな値を示すところか
ら、本発明磁気シールド用粉末１〜２０は従来磁気シー
ルド用粉末１〜２に比べて優れた磁気シールド性能を示
すことが分かる。しかし、この発明の範囲から外れてい
る値（表３において、この発明の範囲から外れている値
に＊印を付して示した。）を有する比較磁気シールド用
粉末１〜８で作製した磁気シールド板を設置した時のシ
ールド比：Ｂ／Ｂ0 はやや大きくなることから、比較磁
気シールド用粉末１〜８の磁気シールド性能はやや劣る
ことがわかる。From the results shown in Tables 1 to 6, C is 0.
Powder for magnetic shield 1 to 20 of the present invention containing 5 to 3 atomic%
When the magnetic shield plate made in is installed, the shield ratio:
B / B 0 is the conventional magnetic shield powder 1 to 1 that does not contain C
The magnetic shield powders 1 to 20 of the present invention are the same as those of the conventional magnetic shield powders 1 to 2 because the shield ratio when the magnetic shield plate produced in 2 is installed is markedly smaller than B / B 0. It can be seen that the magnetic shield performance is superior in comparison. However, the magnetism prepared with the comparative magnetic shielding powders 1 to 8 having values outside the scope of the present invention (in Table 3, the values outside the scope of the present invention are marked with *) Since the shield ratio B / B 0 when the shield plate is installed is slightly large, it can be seen that the magnetic shield performance of the comparative magnetic shield powders 1 to 8 is slightly inferior.
【００２６】[0026]
【発明の効果】この発明によると、従来よりも優れた磁
気シールド用粉末を提供することができ、電気および電
子産業において優れた効果をもたらすものである。According to the present invention, it is possible to provide a magnetic shielding powder which is superior to the conventional one, and to exert an excellent effect in the electric and electronic industries.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０１Ｆ 1/147 Ｈ０５Ｋ 9/00 Ｗ 7128−4Ｅ Ｈ 7128−4Ｅ (72)発明者 斉藤 八郎 東京都新宿区市谷加賀町一丁目１番１号 (72)発明者 吉岡 康明 東京都新宿区市谷加賀町一丁目１番１号 (72)発明者 梅沢 敦 東京都新宿区市谷加賀町一丁目１番１号 (72)発明者 石山 宏一 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社中央研究所内 (72)発明者 武下 拓夫 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社中央研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Office reference number FI Technical display location H01F 1/147 H05K 9/00 W 7128-4E H 7128-4E (72) Inventor Hachiro Saito Tokyo 1-1-1, Ichigaya-Kagacho, Shinjuku-ku (72) Inventor Yasuaki Yoshioka 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo (72) Inventor Atsushi Umezawa 1-1-1, Ichigaya-ka, Shinjuku-ku, Tokyo Issue (72) Inventor Koichi Ishiyama 1-297 Kitabukuro-cho, Omiya City, Saitama Prefecture Central Research Laboratory, Mitsubishi Materialial Co., Ltd. (72) Inventor Takuo Takeshita 1-297, Kitabukuro Town, Omiya City Saitama Prefecture Central Research Laboratory, Mitsubishi Materiality Co., Ltd.
Claims (1)
を累計して５０％になったときの粒径をＤ50とすると、
Ｄ50：１０〜４０μｍであり、アスペクト比（Ｄ50／
ｄ）：２０〜５００である磁気シールド用粉末におい
て、 ＭをＡｌまたはＳｉのうちの１種または２種とすると、
原子％で、 Ｍ：１５〜３０％、 Ｃｒ：３〜１５％、 Ｃ：０．５〜３％、 残部：Ｆｅおよび不可避不純物からなる成分組成を有す
ることを特徴とする磁気シールド用粉末。1. An average thickness d: 0.02 to 0.6 μm, where D 50 is the particle size when the total weight is 50% from the smaller particle size determined by a particle size distribution meter. ,
D 50 : 10 to 40 μm, and the aspect ratio (D 50 /
d): In the magnetic shielding powder of 20 to 500, if M is one or two of Al or Si,
A magnetic shield powder having an atomic composition of M: 15 to 30%, Cr: 3 to 15%, C: 0.5 to 3%, balance: Fe and inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05085514A JP3094727B2 (en) | 1993-03-19 | 1993-03-19 | Powder for magnetic shielding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05085514A JP3094727B2 (en) | 1993-03-19 | 1993-03-19 | Powder for magnetic shielding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06275418A true JPH06275418A (en) | 1994-09-30 |
| JP3094727B2 JP3094727B2 (en) | 2000-10-03 |
Family
ID=13861028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05085514A Expired - Lifetime JP3094727B2 (en) | 1993-03-19 | 1993-03-19 | Powder for magnetic shielding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3094727B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0854669A1 (en) * | 1997-01-20 | 1998-07-22 | Daido Steel Company Limited | Soft magnetic alloy powder for electromagnetic and magnetic shield, and shielding members containing the same |
| JP2007273732A (en) * | 2006-03-31 | 2007-10-18 | Tdk Corp | Noise suppressing soft magnetism metal powder and noise suppressing sheet |
| JP2009074176A (en) * | 1997-09-22 | 2009-04-09 | Mitsubishi Materials Corp | FLAT Fe-BASED ALLOY POWDER FOR MAGNETIC SHIELDING |
| CN109834257A (en) * | 2017-11-27 | 2019-06-04 | 洛阳尖端技术研究院 | A kind of wave absorbing agent and preparation method thereof |
| CN111455409A (en) * | 2020-05-25 | 2020-07-28 | 有研资源环境技术研究院(北京)有限公司 | Coating material of magnetic shielding tank shell for vertical aluminum electrolytic tank and preparation method of magnetic shielding tank shell |
-
1993
- 1993-03-19 JP JP05085514A patent/JP3094727B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0854669A1 (en) * | 1997-01-20 | 1998-07-22 | Daido Steel Company Limited | Soft magnetic alloy powder for electromagnetic and magnetic shield, and shielding members containing the same |
| JP2009074176A (en) * | 1997-09-22 | 2009-04-09 | Mitsubishi Materials Corp | FLAT Fe-BASED ALLOY POWDER FOR MAGNETIC SHIELDING |
| JP2007273732A (en) * | 2006-03-31 | 2007-10-18 | Tdk Corp | Noise suppressing soft magnetism metal powder and noise suppressing sheet |
| CN109834257A (en) * | 2017-11-27 | 2019-06-04 | 洛阳尖端技术研究院 | A kind of wave absorbing agent and preparation method thereof |
| CN111455409A (en) * | 2020-05-25 | 2020-07-28 | 有研资源环境技术研究院(北京)有限公司 | Coating material of magnetic shielding tank shell for vertical aluminum electrolytic tank and preparation method of magnetic shielding tank shell |
| CN111455409B (en) * | 2020-05-25 | 2021-07-30 | 有研资源环境技术研究院(北京)有限公司 | Coating material of magnetic shielding tank shell for vertical aluminum electrolytic tank and preparation method of magnetic shielding tank shell |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3094727B2 (en) | 2000-10-03 |
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