JPS62232102A - Dust core and manufacture thereof - Google Patents
Dust core and manufacture thereofInfo
- Publication number
- JPS62232102A JPS62232102A JP7510086A JP7510086A JPS62232102A JP S62232102 A JPS62232102 A JP S62232102A JP 7510086 A JP7510086 A JP 7510086A JP 7510086 A JP7510086 A JP 7510086A JP S62232102 A JPS62232102 A JP S62232102A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- amorphous
- amorphous alloy
- magnetic core
- crystalline phase
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 60
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims abstract description 3
- 238000005056 compaction Methods 0.000 claims description 5
- 239000012212 insulator Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 abstract description 3
- 229920000647 polyepoxide Polymers 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000009692 water atomization Methods 0.000 abstract description 2
- 229910008423 Si—B Inorganic materials 0.000 abstract 2
- 230000008021 deposition Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 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
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15358—Making agglomerates therefrom, e.g. by pressing
- H01F1/15366—Making agglomerates therefrom, e.g. by pressing using a binder
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はチ目−クコイル、ノイズフィルター等に好適な
直流重畳特性に優れた圧粉磁心およびその製造方法に関
するものである０
〔従来の技術〕
従来、チ嘗−クコイルやノイズフィルター等の磁心とし
ては鉄、ＭｏパーマロイやＦｅ −５ｔ−Ａｌ圧粉磁心
等が用いられていた。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a powder magnetic core with excellent direct current superimposition characteristics suitable for use in square coils, noise filters, etc., and a method for manufacturing the same. ] Conventionally, iron, Mo permalloy, Fe-5t-Al dust cores, etc. have been used as magnetic cores for check coils, noise filters, and the like.
鉄圧粉磁心はコア損失が大きい、透磁率が低い。Iron powder magnetic core has large core loss and low magnetic permeability.
直流重畳特性が悪い等の問題点があり、励パーマロイ圧
粉磁心やＦｅ −５ｔ−Ａｌ圧粉磁心は飽和磁束密度が
やや低く、コア損失も比較的大きい等の問題点かある。There are problems such as poor DC superimposition characteristics, and excited permalloy powder magnetic cores and Fe-5t-Al powder magnetic cores have problems such as slightly low saturation magnetic flux density and relatively large core loss.
近年アそルファス合金が高い透磁率、低損失。In recent years, amorphous alloys have high magnetic permeability and low loss.
電気抵抗が高く周波数依存性に優れるため各種磁性部品
への通用が行なわれている。アモルファス合金を圧粉磁
心にしようとする試みはたとえば、瞥開５５−１３３５
０７に記載されている０〔発明が解決しようとする問題
点〕
しかし、上記のアモルファス圧粉磁心は一般に密度が十
分上がらないため透磁率が低く直流重畳特性が悪いとい
う欠点がある。この理由はアモルファス合金は塑性変形
しにくいためである。Because it has high electrical resistance and excellent frequency dependence, it is used in various magnetic parts. Attempts to make powder magnetic cores from amorphous alloys include, for example,
0 [Problems to be Solved by the Invention] However, the above-mentioned amorphous powder magnetic core generally has a drawback that the density is not sufficiently increased, so that the magnetic permeability is low and the DC superimposition characteristics are poor. The reason for this is that amorphous alloys are difficult to deform plastically.
本発明の目的は、従来のアモルファス圧粉磁心より直流
重畳特性に優れた圧粉磁心およびその製造方法を提供す
ることである。An object of the present invention is to provide a powder magnetic core with superior DC superimposition characteristics than conventional amorphous powder magnetic cores, and a method for manufacturing the same.
〔問題点をル１決するだめの手段〕
本発明は納品質相を３０％未満含有するアモルファス合
金からなり、粉末粒子間が電気的に絶縁されていること
を特徴とする圧粉磁心およびその製造方法である。[Means to resolve the problem once and for all] The present invention relates to a powder magnetic core made of an amorphous alloy containing less than 30% of delivered phase, and characterized in that the powder particles are electrically insulated, and the production thereof. It's a method.
本゛発明において用いるアモルファス合金粉末はＦｅ−
８ｔ−Ｂ糸アモルファスやＣｏ −Ｆｅ−８ｔ −Ｂ系
アモルファス等が通している。The amorphous alloy powder used in the present invention is Fe-
8t-B yarn amorphous, Co-Fe-8t-B amorphous, etc. are passed through.
符に組成式
％式％
Ｙ希土類元素から選ばれる少なくとも１．Ｈの元素であ
り、
０≦ａ≦０．１ 、０≦Ｘ≦１０．Ｏ≦ｙ≦１８゜５≦
２≦′５ｏ、ｉｓ≦ｙ十ｚ≦３０
なる条件を満足するアモルファス合金粉末を用いた場合
低損失のものが得られやすい、
本発明に用いられるアモルファス合金粉末は１００チア
モルファスである必要はなく結晶を含んでいても良い。Composition formula % Formula % Y At least 1. selected from rare earth elements. It is an element of H, and 0≦a≦0.1, 0≦X≦10. O≦y≦18゜5≦
When using an amorphous alloy powder that satisfies the following conditions: 2≦'5o, is≦y1z≦30, it is easy to obtain a low loss one.The amorphous alloy powder used in the present invention does not need to be 100thiamorphous. It may contain crystals.
また圧粉成形する前、後に熱処理を行っても良い。Further, heat treatment may be performed before or after compaction.
本発明に用いるアモルファス合金粉末は水アトマイズ法
２回転液中に浴湯を噴出する方法、超音波がスマトマイ
ズ法や、アモルファス薄帯を作製後機械的に粉砕する等
の方法により作製される〇圧粉成形の際は粒子間の絶縁
と磁心の強度を上けるため、エポキシ樹脂、尿素樹脂、
水ガラス。The amorphous alloy powder used in the present invention is produced by a water atomization method in which bath water is jetted into a two-turn liquid, an ultrasonic smutization method, or a method in which an amorphous ribbon is produced and then mechanically crushed. During powder molding, epoxy resin, urea resin,
water glass.
フェノール樹脂、リン酸アルミニウム、スラアリン酸亜
鉛等のバインダーを添加する。Add a binder such as phenolic resin, aluminum phosphate, or zinc sulfate.
また場合によっては、圧粉成形前にアモルファス合金粉
末表面を酸化させたり、耐熱性の絶縁物で被覆しても良
い。この場合圧粉成形後絶縁がこわれにくく、周波数特
性が良好なものが得られる。In some cases, the surface of the amorphous alloy powder may be oxidized or coated with a heat-resistant insulator before compaction. In this case, the insulation is hard to break after powder compacting, and a product with good frequency characteristics can be obtained.
圧粉成形の際加熱し結晶相をアモルファス相の５０％未
満析出させながら成形するのは、このような条件で圧粉
体の密度が上がりやすく、アモルファス単相の圧粉磁心
より密度が上がるためである。The reason why powder compacting is heated to precipitate less than 50% of the crystalline phase of the amorphous phase is because the density of the powder compact tends to increase under these conditions, and the density is higher than that of an amorphous single-phase powder magnetic core. It is.
３０％以上結晶相を析出させると磁気特性特にコア損失
が急激に増加するため好ましくない。If more than 30% of the crystalline phase is precipitated, the magnetic properties, particularly the core loss, will increase rapidly, which is not preferable.
符に好ましい結晶相の析出室は０．１％から１０チでち
る。この範囲で直流重畳時性が特に良好である。The preferred crystal phase precipitation chamber ranges from 0.1% to 10%. In this range, DC superimposition properties are particularly good.
また圧粉成形後結晶化温度以下の温度で磁場中あるいは
無！ａ場中で熱処理を行りても良い。Also, after compaction, at a temperature below the crystallization temperature, in a magnetic field or without! a Heat treatment may be performed in-situ.
以下本発明を実施例に従って説明する。 The present invention will be explained below according to examples.
実施例１
Ｆｅｔｔ Ｍｏｏ、ａ Ｓｉ’ｔｓ、ｓ Ｂｅアモルフ
ァス合金薄帯を作製し、機械的に粉砕し粉末とした。次
にこの粉末に水ガラス、リン酸アルミニウム粉末、フェ
ノール樹脂粉末、アセトン、メタノールを混ぜた後、金
型を４２５℃に加熱し、１５Ｔ／ｄの圧力で５０分保持
し圧粉成形した。得られた外径２１間、内径１２閣、高
さ８鰭の圧粉磁心をエポキシ樹脂で粉体コーティングし
、磁気特性を測定した。測定径圧粉磁心を切断し薄くし
た後電子顕微鏡により組織観察を行った。その結果体積
比で約６％結晶相が存在しているのが確認された。Example 1 Fett Moo, a Si'ts, s Be amorphous alloy ribbons were produced and mechanically ground into powder. Next, this powder was mixed with water glass, aluminum phosphate powder, phenol resin powder, acetone, and methanol, and then the mold was heated to 425° C. and held at a pressure of 15 T/d for 50 minutes to perform powder compaction. The resulting powder magnetic core with an outer diameter of 21 mm, an inner diameter of 12 mm, and a height of 8 fins was powder coated with epoxy resin, and its magnetic properties were measured. After cutting the measured diameter powder magnetic core into thin pieces, the structure was observed using an electron microscope. As a result, it was confirmed that approximately 6% by volume of crystalline phase was present.
第１図に作製した本発明圧粉磁心Ａの直流重畳特性を示
す。比較のため同組成で結晶相の認められなかったアモ
ルファス圧粉磁心Ｂの直流重畳時性も示す。FIG. 1 shows the DC superposition characteristics of the powder magnetic core A of the present invention manufactured. For comparison, the DC superposition behavior of amorphous powder magnetic core B with the same composition and no crystalline phase is also shown.
本発明の圧粉磁心Ａは密度が上がっているため低直流′
Ｎ畳磁界側で増分透磁率μΔが高く、従来のアモルファ
ス圧粉磁心Ｂより優れた直流１畳特性を示す。The powder magnetic core A of the present invention has a low DC current due to its increased density.
The incremental magnetic permeability μΔ is high on the N tatami magnetic field side, and it exhibits DC 1 tatami characteristics superior to the conventional amorphous powder magnetic core B.
実施例２
第１表に本発明による圧粉磁心と従来の同組成のアモル
ファス圧粉磁心の１０ＫＨｚ、直流重畳磁界００ｅの場
合の１０ＫＨｚにおける増分透磁率μΔを比較した表で
ある。Example 2 Table 1 is a table comparing the incremental magnetic permeability μΔ at 10 KHz of a powder magnetic core according to the present invention and a conventional amorphous powder magnetic core having the same composition at 10 KHz in the case of a DC superimposed magnetic field 00e.
第 １ 表
本発明の製造方法によシ作製した圧粉磁心は、同組成の
従来のアモルファス圧粉磁心よりμΔが高く、優れてい
る。また高直流重畳磁界側の増分透磁率も従来のアモル
ファス圧粉磁心より優れている。このため磁心を、小型
化することが可能である０
実施例６
Ｃｏｙｚ Ｆｅ＋ Ｍｎｓ ５ｉ１ｓ ８１１７モル７
７７合金粉末を作製し、この粉末に水ガラス、リン酸ア
ルミニウム粉末、フェノール樹脂粉末、アセトン、メタ
ノールを混ぜた後、金型を４２０℃に加熱し、１５ Ｔ
／ｃｍの圧力で圧粉成形した。４２０℃に保持する時間
を変えた試料の１００ＫＨｚ 、 ＢｍＯ，２Ｔのコア
損失ＷＯ，２，１００にと、１０ＫＨｚ、ｉｌｊ流重畳
ｉ亦００ｅ＋ｃ）増分透磁率μΔを測定し、結晶相の体
積率を電子顕微＊によｐ測定した。得られた結果を第２
表に示す。Table 1 The powder magnetic core produced by the manufacturing method of the present invention has a higher μΔ and is superior to a conventional amorphous powder magnetic core having the same composition. Additionally, the incremental magnetic permeability on the high DC superimposed magnetic field side is also superior to conventional amorphous powder magnetic cores. Therefore, it is possible to downsize the magnetic core0 Example 6 Coyz Fe+ Mns 5i1s 8117 moles7
After preparing 77 alloy powder and mixing water glass, aluminum phosphate powder, phenol resin powder, acetone, and methanol with this powder, the mold was heated to 420°C and heated to 15 T.
The powder was compacted at a pressure of /cm. 100 KHz, BmO, 2T core loss WO, 2,100 and 10 KHz, ilj flow superposition i ｦ00e+c) Incremental magnetic permeability μΔ of the samples held at 420°C for different times were measured, and the volume fraction of the crystal phase was determined. p was measured using an electron microscope*. The obtained results are shown in the second
Shown in the table.
第２表
表から明らかなように、結晶相を含むとμ６が高くな９
好まない煩向が認められるようになるが、３０チ以上に
なると急激にμΔが低下する。As is clear from Table 2, when a crystalline phase is included, μ6 increases.9
Unfavorable tendencies become apparent, but μΔ drops rapidly when the temperature exceeds 30 inches.
またコア損失Ｗ０．２／１００には′５０％以上の結晶
相を含むと急激に増加するため好ましくなくなる。Moreover, the core loss W0.2/100 increases rapidly if it contains more than 50% of the crystalline phase, which is not desirable.
このため結晶相の体積率は３０チ未満が望ましい。特に
低いコア損失と高いμΔを実現するためには結晶相の体
積率は０．１以上３０チ未満が望ましいことがわかる。Therefore, the volume fraction of the crystal phase is preferably less than 30 inches. It can be seen that in order to particularly achieve low core loss and high μΔ, the volume fraction of the crystal phase is desirably 0.1 or more and less than 30 μ.
本発明によれば従来直流重畳特性が不充分であったアモ
ルファス圧粉磁心よシ直流１畳特性に優れた圧粉磁心が
得られるためその効果は著しいものがある。According to the present invention, a powder magnetic core having excellent DC superimposition characteristics can be obtained compared to an amorphous powder magnetic core which conventionally had insufficient DC superimposition characteristics, so the effect is remarkable.
第１図は本発明に係る圧粉磁心Ａと従来のアモルファス
圧粉磁心Ｂの直流事前特性を比較して示した図である。
Ａ：本発明圧粉磁心
Ｂ：従来のアモルファス圧粉磁心
昭和６１年 特許願 第７５１００号
発明の名称
圧粉磁心ｄ３ にびその製造方法
補正をする者
事件との関係 特許出願人
住所 東京都千代田区丸の内二丁目１番２号名称 （５
Ｏａ）日立金属株式会社
補正の対象 明細書の「発明の詳細な説明」の欄。
補正の内容
（１）第４頁第９〜１０行の［超音波がスマトマイズ法
」を［超音波ガスアトマイｌズ法」に訂正する。FIG. 1 is a diagram showing a comparison of DC preliminary characteristics of a powder magnetic core A according to the present invention and a conventional amorphous powder magnetic core B. A: Powder magnetic core of the present invention B: Conventional amorphous powder magnetic core 1988 Patent application No. 75100 Name of the invention Powder magnetic core d3 Relationship with the case concerning the person who amends the manufacturing method Patent applicant address Chiyoda-ku, Tokyo Marunouchi 2-chome 1-2 name (5
Oa) Target of amendment by Hitachi Metals Co., Ltd. "Detailed description of the invention" column of the specification. Details of the amendment (1) "Ultrasonic gas atomization method" in lines 9 and 10 of page 4 is corrected to "Ultrasonic gas atomization method."
Claims (3)
からなり、粉末粒子間が電気的に実質的に絶縁されてい
ることを特徴とする圧粉磁心。(1) A dust core made of an amorphous alloy containing less than 30% of a crystalline phase, characterized in that powder particles are substantially electrically insulated.
、あるいは作製したアモルファス合金薄帯を粉砕し、粉
末を作製した後、該粉末にバインダーを介在させ圧粉成
形する際温度を上げ結晶質相をアモルファス相の３０％
未満析出させながら成形することを特徴とする圧粉磁心
の製造方法。(2) After rapidly cooling the molten metal to produce an amorphous alloy powder, or by pulverizing the produced amorphous alloy ribbon to produce a powder, the powder is interposed with a binder and the temperature is raised during compaction to form a crystalline phase. 30% of the amorphous phase
A method for manufacturing a powder magnetic core, characterized by forming the powder magnetic core while causing less precipitation.
せる、あるいは耐熱性の絶縁物で被覆した後、圧粉成形
することを特徴とする特許請求の範囲第２項に記載の圧
粉磁心の製造方法。(3) A powder magnetic core according to claim 2, characterized in that the amorphous alloy powder is oxidized before compacting or is coated with a heat-resistant insulator and then compacted. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510086A JPS62232102A (en) | 1986-04-01 | 1986-04-01 | Dust core and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7510086A JPS62232102A (en) | 1986-04-01 | 1986-04-01 | Dust core and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62232102A true JPS62232102A (en) | 1987-10-12 |
Family
ID=13566414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7510086A Pending JPS62232102A (en) | 1986-04-01 | 1986-04-01 | Dust core and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62232102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158121A (en) * | 1992-11-27 | 1994-06-07 | Mitsubishi Electric Corp | Magnetic material formed with electric discharge-machined powder |
| US6749767B2 (en) | 2001-03-21 | 2004-06-15 | Kobe Steel Ltd | Powder for high strength dust core, high strength dust core and method for making same |
-
1986
- 1986-04-01 JP JP7510086A patent/JPS62232102A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06158121A (en) * | 1992-11-27 | 1994-06-07 | Mitsubishi Electric Corp | Magnetic material formed with electric discharge-machined powder |
| US6749767B2 (en) | 2001-03-21 | 2004-06-15 | Kobe Steel Ltd | Powder for high strength dust core, high strength dust core and method for making same |
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