EP0337716A2 - Ruban magnétique et noyau magnétique - Google Patents

Ruban magnétique et noyau magnétique Download PDF

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Publication number
EP0337716A2
EP0337716A2 EP89303542A EP89303542A EP0337716A2 EP 0337716 A2 EP0337716 A2 EP 0337716A2 EP 89303542 A EP89303542 A EP 89303542A EP 89303542 A EP89303542 A EP 89303542A EP 0337716 A2 EP0337716 A2 EP 0337716A2
Authority
EP
European Patent Office
Prior art keywords
magnetic
ribbon
particles
magnetic ribbon
attached
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
Application number
EP89303542A
Other languages
German (de)
English (en)
Other versions
EP0337716A3 (en
EP0337716B1 (fr
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
Mitsui Chemicals Inc
Original Assignee
Mitsui Petrochemical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
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
Application granted granted Critical
Publication of EP0337716B1 publication Critical patent/EP0337716B1/fr
Anticipated expiration legal-status Critical
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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.
  • a magnetic ribbon on at least one side of which particles, preferably fine particles, formed of a nonmagnetic, preferably inorganic, substance having insulating properties are attached.
  • the invention also provides a magnetic core having 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 an inorganic substance 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 where the particles are antimony pentoxide suspended in toluene they may form 1% to 10%, preferably 2% to 5%, eg 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 that are attached to such a magnetic ribbon are that it is nonmagnetic, and that it has insulating properties. If the fine particles are magnetic and conductive, an adverse effect is exerted on magnetic characteristics, and an eddy current is liable to flow.
  • inorganic substances used in the present invention it is possible to cite the following: (1) inorganic substances which are stable in a natural condition, including glass (sodium silicate), mica (aluminosilicate alkali salt and phyllosilicate alkali salt), silicon carbide, calcium sulfate semi-water salt, potassium carbonate, magnesium carbonate, calcium carbonate, barium sulfate, and the like; (2) metal oxides such as aluminum oxide, boron oxide, magnesium oxide, silicon dioxide, tin dioxide, zinc oxide, zirconium dioxide, antimony pentoxide, and the like; and (3) ceramics formed of the materials cited in (2) above and double oxides such as perovskite, silicate glass, phosphate, titanic acid salt, niobium, tantalum, and tungstate; ceramics formed singly or in a combination by using such ceramic materials as nitrides, including aluminum nitride, a sintered body of aluminum oxide and nitride, boron nitrid
  • 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 ⁇ 7cm3 to 2 x 10 ⁇ ­4cm3, more preferably 3 x 10 ⁇ 6cm3 - 10 ⁇ 5cm3, per unit area (1 cm2). If this amount attached is calculated into the weight of fine particles per unit area, although its value changes depending on the specific weight of the material of the fine particles, in the case of antimony pentoxide, the weight is 3.8 x 10 ⁇ 7g/cm2 - 7.6 x 10 ⁇ 4g/cm2, preferably 1.1 x 10 ⁇ 5g/cm2 - 3.8 x 10 ⁇ 5g/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.
  • this inorganic substance 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 - 5 hours at the temperature of 300 - 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.
  • Organic solvent toluene, 100 wt%
  • Fine particles antimony pentoxide, 3 wt%
  • Organic solvent toluene, 70 wt%
  • Fine particles antimony pentoxide, 30 wt%
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Heads (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Magnetic Record Carriers (AREA)
  • Decoration Of Textiles (AREA)
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 true EP0337716A2 (fr) 1989-10-18
EP0337716A3 EP0337716A3 (en) 1990-09-19
EP0337716B1 EP0337716B1 (fr) 1995-03-01

Family

ID=13949956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89303542A Expired - Lifetime EP0337716B1 (fr) 1988-04-11 1989-04-11 Ruban magnétique et noyau magnétique

Country Status (6)

Country Link
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018404A1 (fr) * 1990-05-18 1991-11-28 Allied-Signal Inc. Noyaux magnetiques fabriques avec des rubans de verre metallique et un isolant interlaminaire en papier de mica
EP0480265A1 (fr) * 1990-10-03 1992-04-15 Nippon Steel Corporation Procédé de fabrication d'âmes en permalloy
EP0625786A3 (fr) * 1993-05-21 1995-01-25 Hitachi Metals Ltd Ruban d'alliage nanocristalline magnétiquement doux revêtu d'une couche isolante; noyau magnétique de cela et applications.
WO2006014632A3 (fr) * 2004-07-22 2006-04-20 Axcelis Tech Inc Aimant perfectionne pour faisceaux ioniques de balayage
US9331493B2 (en) 2012-01-13 2016-05-03 Honda Motor Co., Ltd. Electric load control apparatus
US11715591B2 (en) 2020-03-27 2023-08-01 Proterial, Ltd. Method for manufacturing a wound magnetic core

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023031770A (ja) 2021-08-25 2023-03-09 Tdk株式会社 磁性合金薄帯、積層体および磁性コア

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61181114A (ja) * 1985-02-07 1986-08-13 Toshiba Corp 巻鉄心の製造方法
WO1986005314A1 (fr) * 1985-02-27 1986-09-12 Kawasaki Steel Corporation Lamine de bande mince d'alliage amorphe, noyau realise avec une bande mince d'alliage amorphe, et leur procede de production
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
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018404A1 (fr) * 1990-05-18 1991-11-28 Allied-Signal Inc. Noyaux magnetiques fabriques avec des rubans de verre metallique et un isolant interlaminaire en papier de mica
EP0480265A1 (fr) * 1990-10-03 1992-04-15 Nippon Steel Corporation Procédé de fabrication d'âmes en permalloy
EP0625786A3 (fr) * 1993-05-21 1995-01-25 Hitachi Metals Ltd Ruban d'alliage nanocristalline magnétiquement doux revêtu d'une couche isolante; noyau magnétique de cela et applications.
US5486404A (en) * 1993-05-21 1996-01-23 Hitachi Metals, Ltd. Nano-crystalline soft magnetic alloy ribbon with insulation coating and magnetic core made therefrom and pulse generator, laser unit and accelerator therewith
WO2006014632A3 (fr) * 2004-07-22 2006-04-20 Axcelis Tech Inc Aimant perfectionne pour faisceaux ioniques de balayage
US9331493B2 (en) 2012-01-13 2016-05-03 Honda Motor Co., Ltd. Electric load control apparatus
US11715591B2 (en) 2020-03-27 2023-08-01 Proterial, Ltd. Method for manufacturing a wound magnetic core
US12191071B2 (en) 2020-03-27 2025-01-07 Proterial, Ltd. Wound magnetic core

Also Published As

Publication number Publication date
JPH01259510A (ja) 1989-10-17
ATE119309T1 (de) 1995-03-15
DE68921363D1 (de) 1995-04-06
CA1340795C (fr) 1999-10-19
JP2716064B2 (ja) 1998-02-18
DE68921363T2 (de) 1995-07-13
EP0337716A3 (en) 1990-09-19
EP0337716B1 (fr) 1995-03-01
KR890016591A (ko) 1989-11-29
KR920005490B1 (ko) 1992-07-06

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