EP0337716B1 - Ruban magnétique et noyau magnétique - Google Patents

Ruban magnétique et noyau magnétique Download PDF

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Publication number
EP0337716B1
EP0337716B1 EP89303542A EP89303542A EP0337716B1 EP 0337716 B1 EP0337716 B1 EP 0337716B1 EP 89303542 A EP89303542 A EP 89303542A EP 89303542 A EP89303542 A EP 89303542A EP 0337716 B1 EP0337716 B1 EP 0337716B1
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EP
European Patent Office
Prior art keywords
ribbon
magnetic
fine particles
core
magnetic ribbon
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 - Lifetime
Application number
EP89303542A
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German (de)
English (en)
Other versions
EP0337716A2 (fr
EP0337716A3 (en
Inventor
Takashi Matsuoka
Toshikazu Furihata
Yasushi Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Chemi Con Corp
Original Assignee
Mitsui Petrochemical Industries Ltd
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Publication date
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Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Publication of EP0337716A2 publication Critical patent/EP0337716A2/fr
Publication of EP0337716A3 publication Critical patent/EP0337716A3/en
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
    • 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
    • H01F1/15383—Applying coatings thereon
    • 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
    • H01F1/16—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 in the form of sheets
    • H01F1/18—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 in the form of sheets with insulating coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/25—Magnetic cores made from strips or ribbons

Definitions

  • the present invention relates to a magnetic ribbon and a magnetic core formed by using said magnetic ribbon.
  • a magnetic core is formed by winding or laminating a magnetic ribbon, and if insulation between layers of the ribbon is poor, an eddy current flowing across the ribbon layers occurs and an increase in eddy current losses results in an increase in overall core losses (magnetic losses). This tendency is particularly noticeable in the case of high frequencies. In addition, the frequency characteristics of permeability is poor, and it is impossible to expect any advantageous use at 100 kHz or more.
  • an insulating layer formed of a nonmagnetic material is conventionally provided between the ribbon layers, and a uniform insulating film is formed on the ribbon surface as one means thereof, so as to solve the aforementioned problem.
  • annealing is usually carried out at 400°C or thereabouts. However, if such annealing is carried out, because of a difference in the coefficient of linear expansion, i.e., since the coefficient of linear expansion of the insulating film is greater than that of the amorphous ribbon, compressive stress occurs in the ribbon, and magnetic characteristics deteriorate due to the adverse effect of magnetostriction.
  • an insulating film is generally interposed between ribbon layers, and the greatest matter of concern to those skilled in the art lies in finding an insulating material having an excellent insulating performance.
  • JP-A-62/10278 describes an alloy strip coated with colloidal silica in a metallic phosphate solution and upon this document, the prior art portion of claims 1 and 4 are based.
  • EP-A-0 214 305 describes an alloy strip coated with an adhesive of a borosilicone resin for producing a laminated core.
  • a magnetic ribbon for winding or lamination into a magnetic core the magnetic ribbon being formed of an amorphous metal and having fine particles coated on at least one surface thereof said fine particles having electrically-insulating properties; characterised in that said fine particles are antimony pentoxide particles having a size in the range of from 10 nm to 2 »m, and in that the fine particles are coated on said at least one surface in an amount in the range of from 10 ⁇ 7 cm3 to 2 x 10 ⁇ 4 cm3 per cm2 of surface area.
  • the invention also provides a process for making the ribbon and a magnetic core of such a ribbon wound therearound or laminated thereon.
  • the particles may be attached so as to secure a layer of air so that in the absence of a conventional insulating film, the air present between the layers can serve as an insulating layer and prevent an eddy current, and the space factor can be made as large as possible.
  • particles formed of antimony pentoxide are attached on at least one surface of the magnetic ribbon, so that if the magnetic ribbon is wound or laminated to form a magnetic core, the particles serve as a spacer, thereby forming a layer of air between adjacent layers of the ribbon.
  • the particles may be attached uniformly and densely on at least one surface of the ribbon.
  • the particles themselves function as an insulating layer. Nevertheless, in this case as well, it is possible to obtain the same effect as that obtained by securing a layer of air by means of the particles. Accordingly, the present invention includes both the case where the particles are attached coarsely and the case where they are attached densely.
  • the particles may be applied by any suitable method for example by passing the magnetic ribbon through a suspension containing the particles. Where it is intended that the particles should act as a spacer trapping a layer of air between layers or windings of a core the proportion of particles in the suspension may be chosen to be suitably low. For example, when suspended in toluene, they may form 1% to 10%, preferably 2% to 5%, e.g. about 3%, by weight of the suspension.
  • the particles should be attached more densely so as to act as the insulation then a higher proportion may be used in the suspension.
  • a higher proportion may be used in the suspension.
  • 20% by weight for example 20% to 50%, e.g. about 30% by weight.
  • a magnetic ribbon and a magnetic core can be provided having excellent magnetic characteristics while securing insulating properties between ribbon layers with the space factor reduced.
  • the magnetic ribbon referred to in the present invention is a thin magnetic strip, and, as magnetic materials, it is possible to cite the following: ferromagnetic elements such as Fe, Co, and Ni among transition metals, alloys of ferromagnetic elements, alloys of ferromagnetic elements and nonferromagnetic elements which are added to improve characteristics, ferrite, permalloy, amorphous alloys, etc.
  • ferromagnetic elements such as Fe, Co, and Ni among transition metals
  • alloys of ferromagnetic elements alloys of ferromagnetic elements and nonferromagnetic elements which are added to improve characteristics, ferrite, permalloy, amorphous alloys, etc.
  • Fe-based alloys such as Fe-B, Fe-B-C, Fe-B-Si, Fe-B-Si-C, Fe-B-Si-Cr, Fe-Co-B-Si, and Fe-Ni-Mo-B
  • Co-based alloys such as Co-B, Co-Fe-Si-B, Co-Fe-Ni-Mo-B-Si, Co-Fe-Ni-B-Si, Co-Fe-Mn-B-Si, Co-Fe-Mn-Ni, Co-Mn-Ni-B-Si, and Co-Fe-Mn-Ni-B, and other similar alloys.
  • Inorganic fine particles of antimony pentoxide are attached to such a magnetic ribbon.
  • Antimony pentoxide is non-magnetic, and has insulating properties. If the fine particles are magnetic and conductive, an averse effect is exerted on magnetic characteristics, and an eddy current is liable to flow.
  • the size of the fine particles of the inorganic substance if consideration is paid to the fact that the fine particles are attached to the ribbon uniformly so as to form an insulating layer, the size of the fine particles may be small. However, if the particle size is made too small, it constitutes a factor making manufacture difficult. Meanwhile, if the particle size is too large, when the magnetic core is formed by a ribbon, the gap between the adjacent layers of the ribbon becomes too large, so that the space factor of the magnetic material becomes small. For this reason, it is preferred that the size of the fine particles is set in the range of 10 nm to 2 »m.
  • the fine particles may preferably be attached in such a manner that they are attached by 10 ⁇ 7 cm3 to 2 x 10 ⁇ 4 cm3, more preferably 3 x 10 ⁇ 6 cm3 to 10 ⁇ 5 cm, per unit area (1 cm2). If this amount attached is calculated into the weight of fine particles per unit area, it is 3.8 x 10 ⁇ 7 g/cm2 to 7.6 x 10 ⁇ 4 g/cm2, preferably 1.1 x 10 ⁇ 5 g/cm2 to 3.8 x 10 ⁇ 5 g/cm2.
  • Means for attaching the fine particles is so arranged that these fine particles are dispersed in water or a volatile organic solvent such as toluene and, after this solution is applied to the ribbon surface, force or natural drying is carried out, thereby allowing the fine particles to be attached to the ribbon.
  • the concentration of this solution determines the amount of fine particles to be attached to the ribbon.
  • the antimony pentoxide may be dispersed in toluene in a colloidal state at a rate of from 0.1 to 30 wt% with respect to toluene. 3 wt% or thereabouts in this range is also effective, a decline in the space factor is practically nil, and the magnetic characteristics do not deteriorate.
  • the thickness of the film of the solution applied is preferably 10 »m or less in determining the aforementioned amount of fine particles to be attached.
  • a drying furnace may be used for evaporation of the solvent depending on the solvent, and drying may be carried out at 100°C or above.
  • annealing may be carried out for 0.5 to 5 hours at a temperature of 300°C to 500°C in an inert gas atmosphere such as nitrogen so as to eliminate strain, as required.
  • This annealing may be effected after the ribbon is wound or laminated into a magnetic core, or may be effected in the state of the ribbon.
  • annealing may be effected at a temperature 10 to 50°C higher than the Curie point, a magnetic core exhibiting excellent characteristics with respect to high frequencies can be obtained.
  • annealing may be effected in a magnetic field or in a nonmagnetic field.
  • the magnetic core when the amorphous magnetic core with the ribbon wound therearound or laminated thereon is annealed since the fine particles disposed between adjacent ribbon layers are powders, the magnetic core is not subjected to linear expansion. The fine particles rather exhibit the action of absorbing the stress accompanying the shrinkage of the amorphous ribbon.
  • a magnetic ribbon and a solution containing fine particles are prepared.
  • the solution containing the fine particles is applied to at lest one surface of the magnetic ribbon by any of the various methods of application, and the solvent is allowed to dry.
  • the resultant magnetic ribbon with the fine particles attached thereto is wound under tension, thereby obtaining a toroidal-type magnetic core.
  • annealing for eliminating strain is carried out, as necessary.
  • tension applied at the time of winding is preferably 0.05 o 2 kg.
  • the ribbon with fine particles attached thereto is cut into a predetermined configuration, and the cut pieces are laminated so as to form the magnetic core.
  • Annealing which is carried out as necessary may be effected prior to the lamination or after the magnetic core has been formed subsequent to the lamination.
  • an amorphous ribbon 1a (2605S-2, Fe78-B13-Si9, 10 mm width) made by Allied Corp. is fed forward into a colloidal solution 2 of antimony pentoxide.
  • a colloidal solution 2 of antimony pentoxide As the colloidal solution 2 of antimony pentoxide, toluene was used as the solvent, and 3 wt% of antimony was dispersed with respect to toluene 97 wt%.
  • the ribbon 1b with the particles attached thereto was fed forward via a roller 5, and was wound under tension in a final stage, thereby forming an amorphous magnetic core 6.
  • a plurality of magnetic cores having the same dimensions were then formed, and were subjected to annealing for two hours at 435°C in a nitrogen atmosphere.
  • the magnetic cores of the Examples display a hysteresis which is closer to a linear configuration, and that the core loss is low as a whole, and a rise in the high-frequency component can be reduced to a low level.
  • a substantially fixed permeability was obtained up to 200 kHz.

Claims (6)

  1. Ruban magnétique (1b) destiné à être enroulé ou stratifié pour former un noyau magnétique (6), le ruban magnétique (1b) étant fait d'un métal amorphe et une de ses surfaces au moins étant recouverte de fines particules, lesdites fines particules ayant des propriétés d'isolation électrique,
    caractérisé en ce que lesdites fines particules sont des particules de pentoxyde d'antimoine ayant une taille comprise dans la fourchette de 10 nm à 2»m, et en ce que les fines particules sont déposées sur ladite surface au nombre d'au moins une en une quantité comprise entre 10⁻⁷ cm³ et 2 x 10⁻⁴ cm³ par cm² de superficie.
  2. Noyau magnétique (6) formé par enroulement ou stratification d'un ruban magnétique (1b) conforme à la revendication 1, dans lequel une couche des fines particules est placée entre les couches adjacentes de ruban magnétique et de l'air est présent entre lesdites couches adjacentes de ruban magnétique en même temps que ladite couche de fines particules.
  3. Procédé de fabrication d'un noyau métallique (6) qui comprend les étapes consistant à :
    a) enrouler ou stratifier le ruban magnétique (1b) de la revendication 1, et
    b) faire recuire le ruban enroulé ou stratifié pour une durée d'entre 0,5 et 5 heures, à une température comprise entre 300 et 500°C et dans une atmosphère de gaz inerte.
  4. Procédé de fabrication d'un ruban magnétique (1b) qui comprend les étapes consistant à :
    a) déposer une dispersion (2), qui contient de fines particules ayant des propriétés d'isolation électrique, sur une surface au moins d'un ruban (1a) en métal amorphe, et
    b) sécher le ruban recouvert (1a), caractérisé par:
    - l'étape supplémentaire (c) consistant à faire recuire le ruban recouvert séché pour une durée d'entre 0,5 et 5 heures, à une température comprise entre 300 et 500°C et dans une atmosphère de gaz inerte, et
    - le fait que lesdites fines particules sont des particules de pentoxyde d'antimoine ayant une taille comprise dans la fourchette de 10 nm à 2»m, et sont déposées sur ladite surface au nombre d'au moins une en une quantité comprise entre 10⁻⁷ cm³ et 2 x 10⁻⁴ cm³ par cm² de superficie.
  5. Procédé de fabrication d'un noyau magnétique qui comprend les étapes consistant à :
    a) fabriquer un ruban magnétique (1b) selon le procédé de la revendication 4, et
    b) enrouler ou stratifier le ruban magnétique (1b) avant ladite étape de recuit.
  6. Dispositif électrique ou électronique qui contient un noyau magnétique (6) conforme à la revendication 2.
EP89303542A 1988-04-11 1989-04-11 Ruban magnétique et noyau magnétique Expired - Lifetime EP0337716B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP88694/88 1988-04-11
JP63088694A JP2716064B2 (ja) 1988-04-11 1988-04-11 磁性リボン及び磁心

Publications (3)

Publication Number Publication Date
EP0337716A2 EP0337716A2 (fr) 1989-10-18
EP0337716A3 EP0337716A3 (en) 1990-09-19
EP0337716B1 true EP0337716B1 (fr) 1995-03-01

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ID=13949956

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EP89303542A Expired - Lifetime EP0337716B1 (fr) 1988-04-11 1989-04-11 Ruban magnétique et noyau magnétique

Country Status (6)

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EP (1) EP0337716B1 (fr)
JP (1) JP2716064B2 (fr)
KR (1) KR920005490B1 (fr)
AT (1) ATE119309T1 (fr)
CA (1) CA1340795C (fr)
DE (1) DE68921363T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11955261B2 (en) 2021-08-25 2024-04-09 Tdk Corporation Magnetic alloy ribbon, laminate, and magnetic core

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5091253A (en) * 1990-05-18 1992-02-25 Allied-Signal Inc. Magnetic cores utilizing metallic glass ribbons and mica paper interlaminar insulation
DE69109794T2 (de) * 1990-10-03 1996-02-08 Nippon Steel Corp Verfahren zur Herstellung von Kernen aus Permalloy.
JP2909349B2 (ja) * 1993-05-21 1999-06-23 日立金属株式会社 絶縁膜が形成されたナノ結晶軟磁性合金薄帯および磁心ならびにパルス発生装置、レーザ装置、加速器
US20060017010A1 (en) * 2004-07-22 2006-01-26 Axcelis Technologies, Inc. Magnet for scanning ion beams
JP5555725B2 (ja) 2012-01-13 2014-07-23 本田技研工業株式会社 電気負荷制御装置
US11715591B2 (en) 2020-03-27 2023-08-01 Proterial, Ltd. Method for manufacturing a wound magnetic core

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214305A1 (fr) * 1985-02-27 1987-03-18 Kawasaki Steel Corporation Production d'une lamine de bande mince d'alliage amorphe, et d'un noyau realise avec une bande mince d'alliage amorphe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618903A (ja) * 1984-06-25 1986-01-16 Kawasaki Steel Corp 非晶質合金薄帯の特性および打抜性改善方法
JPS61181114A (ja) * 1985-02-07 1986-08-13 Toshiba Corp 巻鉄心の製造方法
JPS61198611A (ja) * 1985-02-27 1986-09-03 Kawasaki Steel Corp 非晶質合金薄帯鉄心による変圧器の製造方法
JPS6210278A (ja) * 1985-07-09 1987-01-19 Kawasaki Steel Corp 恒透磁率に優れた非晶質合金薄帯
JPS6261308A (ja) * 1985-09-11 1987-03-18 Toshiba Corp アモルフアス巻鉄心の熱処理方法
JPS6265403A (ja) * 1985-09-18 1987-03-24 Kawasaki Steel Corp 非晶質合金薄帯の磁気特性改善方法
JPS62188209A (ja) * 1986-02-13 1987-08-17 Tdk Corp 巻鉄心の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214305A1 (fr) * 1985-02-27 1987-03-18 Kawasaki Steel Corporation Production d'une lamine de bande mince d'alliage amorphe, et d'un noyau realise avec une bande mince d'alliage amorphe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11955261B2 (en) 2021-08-25 2024-04-09 Tdk Corporation Magnetic alloy ribbon, laminate, and magnetic core

Also Published As

Publication number Publication date
EP0337716A2 (fr) 1989-10-18
KR920005490B1 (ko) 1992-07-06
ATE119309T1 (de) 1995-03-15
DE68921363D1 (de) 1995-04-06
KR890016591A (ko) 1989-11-29
EP0337716A3 (en) 1990-09-19
DE68921363T2 (de) 1995-07-13
CA1340795C (fr) 1999-10-19
JPH01259510A (ja) 1989-10-17
JP2716064B2 (ja) 1998-02-18

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