WO2023190770A1 - 磁性シートの製造方法 - Google Patents
磁性シートの製造方法 Download PDFInfo
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- WO2023190770A1 WO2023190770A1 PCT/JP2023/012996 JP2023012996W WO2023190770A1 WO 2023190770 A1 WO2023190770 A1 WO 2023190770A1 JP 2023012996 W JP2023012996 W JP 2023012996W WO 2023190770 A1 WO2023190770 A1 WO 2023190770A1
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- Prior art keywords
- alloy ribbon
- magnetic sheet
- ribbon
- nanocrystalline alloy
- amorphous alloy
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- 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)
- H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/003—Making ferrous alloys making amorphous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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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
- 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
- H01F1/15308—Amorphous metallic alloys, e.g. glassy metals based on Fe/Ni
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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
- 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
- H01F1/15333—Amorphous metallic alloys, e.g. glassy metals containing nanocrystallites, e.g. obtained by annealing
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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
- 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
Definitions
- the present disclosure relates to a method for manufacturing a magnetic sheet in which an adhesive layer is attached to one side of a nanocrystalline alloy ribbon.
- the charging method for this secondary battery is the contact charging method, in which the electrode on the power receiving side and the electrode on the power feeding side are brought into direct contact, and the other is the contact charging method, in which a transmission coil is installed on both the power feeding side and the power receiving side, and electromagnetic induction is used.
- a non-contact charging method that charges by power transmission.
- the non-contact charging method does not require electrodes for direct contact between the power feeding device and the power receiving device, it is also possible to charge different power receiving devices using the same power feeding device. Furthermore, the non-contact charging method is a technology that can be used not only for mobile devices but also for other electronic devices, electric vehicles, drones, and the like.
- a magnetic sheet is installed as a coil yoke on the opposite side of the transmission coil to the contact surface between the power supply device and the power reception device.
- Such magnetic sheets have the following roles.
- the first role is as a magnetic shielding material.
- the magnetic sheet can suppress this heat generation as a magnetic shielding material.
- the second role of the magnetic sheet is to act as a yoke member that circulates the magnetic flux generated in the coil during charging.
- ferrite materials were the mainstream soft magnetic materials used for the magnetic sheets of non-contact charging devices, but recently, soft magnetic materials made of amorphous alloys and nanocrystalline alloys have been used, as shown in Japanese Patent Application Laid-Open No. 2008-112830. Magnetic alloy ribbons are also beginning to be applied.
- International Publication No. 2014/157526 discloses a magnetic sheet using a thin ribbon made by heat-treating Fe-based amorphous and having a magnetic permeability ⁇ r of 220 or more and 770 or less at 500 kHz.
- International Publication No. 2020/235643 describes a process of preparing an amorphous alloy ribbon capable of nanocrystallization, and a heat treatment for nanocrystallization while applying tension to the amorphous alloy ribbon.
- a method for producing a nanocrystalline alloy ribbon with a resin film comprising the steps of: obtaining a nanocrystalline alloy ribbon on a resin film via an adhesive layer; and holding the nanocrystalline alloy ribbon on a resin film via an adhesive layer. has been done. It is also disclosed that the method includes a step of forming cracks in the nanocrystalline alloy ribbon.
- Patent Document 1 does not disclose specific means for the heat treatment method.
- Patent Document 2 discloses that a thin plate-like magnetic body 10 made of an Fe-based metal magnetic material and having a single layer thickness of 15 ⁇ m to 35 ⁇ m is heat-treated, and the AC relative magnetic permeability ⁇ r of the thin plate-like magnetic body 10 at a frequency of 500 kHz is determined.
- the heat treatment process and the lamination process are independent processes.
- Patent Document 3 discloses a step of unwinding, heat-treating, and winding up as a heat treatment step. Separately from the heat treatment step, a step is disclosed in which a nanocrystalline alloy ribbon is held on a resin film via an adhesive layer.
- an amorphous alloy ribbon for a nanocrystalline alloy ribbon wound into a coil shape is used.
- the material is unwound, heat treated, and wound into a coil.
- a nanocrystalline alloy ribbon wound into a coil is unwound and an adhesive layer is applied.
- a resin film is pasted through the film and wound into a coil.
- nanocrystalline alloy ribbons are produced by jetting molten alloy adjusted to a predetermined alloy composition onto a rotating cooling roller, rapidly solidifying it to produce an alloy ribbon, and then heat-treating the alloy ribbon. be done.
- the nanocrystalline alloy ribbon has a thin thickness and a predetermined width, and is manufactured as a long ribbon. According to this manufacturing method, anisotropy is likely to be introduced in the casting direction (longitudinal direction), and even after heat treatment, the magnetic properties of the elongate shape are unchanged in the longitudinal direction and the width direction perpendicular to the longitudinal direction. There are different trends.
- nanocrystalline alloy ribbons have excellent magnetic properties (high saturation magnetic flux density, low core loss) and good isotropy. It was difficult to obtain in an expensive way.
- the present disclosure aims to provide a highly productive method for manufacturing a magnetic sheet by reducing the number of times of unwinding and winding.
- Another object of the present invention is to provide a method for manufacturing a magnetic sheet including a nanocrystalline alloy ribbon having excellent magnetic properties and good isotropy.
- a method for manufacturing a magnetic sheet according to a first aspect of the present disclosure includes a heat treatment step of performing heat treatment on an amorphous alloy ribbon to produce a nanocrystalline alloy ribbon, and an adhesive layer on one side of the nanocrystalline alloy ribbon. Equipped with a pasting process, In the heat treatment step, the amorphous alloy ribbon is unwound from the amorphous alloy ribbon wound into a coil, and brought into contact with a heating body while conveying the amorphous alloy ribbon, thereby heating the amorphous alloy ribbon. By bringing a ribbon pressing member into contact with the surface opposite to the surface that contacts the body, the amorphous alloy ribbon is heated while being pressed against the heating body, and a tension of 18 MPa or less is applied to the amorphous alloy ribbon. introduced into the heating body, In the pasting step, an adhesive layer is pasted on the one surface of the nanocrystalline alloy ribbon while transporting the nanocrystalline alloy ribbon that has been transported from the heat treatment process.
- FIG. 1 is a conceptual diagram illustrating an embodiment of the present disclosure.
- FIG. 2 is a conceptual diagram showing an embodiment of a heat treatment process of the present disclosure.
- FIG. 2 is a cross-sectional view showing the structure of the adhesive layer of the present disclosure.
- FIG. 3 is a cross-sectional view showing the structure of the adhesive layer of the present disclosure with the protective sheet removed.
- FIG. 2 is a cross-sectional view showing a structure in which a nanocrystalline alloy ribbon is attached to an adhesive layer of the present disclosure.
- FIG. 2 is a cross-sectional view showing a structure in which cracks are formed in the nanocrystalline alloy ribbon attached to the adhesive layer of the present disclosure.
- 1 is a cross-sectional view showing the structure of an embodiment of a magnetic sheet of the present disclosure.
- a numerical range indicated using "-" indicates a range that includes the numerical values written before and after "-" as the lower limit and upper limit, respectively.
- the upper limit or lower limit described in a certain numerical range may be replaced with the upper limit or lower limit of another numerical range described step by step.
- the upper limit or lower limit described in a certain numerical range may be replaced with the value shown in the Examples.
- FIG. 1 shows a conceptual diagram illustrating a method for manufacturing a magnetic sheet according to an embodiment of the present disclosure.
- FIG. 1 shows a winding body 11 in which an amorphous alloy ribbon 12 for the nanocrystalline alloy ribbon 3 is wound into a coil shape.
- An amorphous alloy ribbon 12 (hereinafter also simply referred to as "thin ribbon 12") is unwound from this roll 11.
- the unwound amorphous alloy ribbon 12 is transported to a heat treatment process.
- the heat treatment method of the present disclosure is a method of heating the amorphous alloy ribbon 12 by bringing it into contact with a heating body.
- the amorphous alloy ribbon 12 When the amorphous alloy ribbon 12 is brought into contact with a heating body and heated, the amorphous alloy ribbon 12 is conveyed, and a ribbon pressing member is brought into contact with the opposite surface of the amorphous alloy ribbon 12 to the surface that contacts the heating body. , the amorphous alloy ribbon 12 is heated while being pressed against a heating body.
- a flexible member may be used as the ribbon pressing member.
- the flexible member is preferably a metal member. Note that the flexible member is a member that can be deformed along the roller.
- the ribbon pressing member may be a belt or a roller.
- Figure 2 shows a conceptual diagram of the heat treatment process.
- the tension of the unwound amorphous alloy ribbon 12 is adjusted by dancer rollers 51 and 52.
- the amorphous alloy ribbon 12 to which a predetermined tension has been applied is heated in contact with a heating roller 16 that acts as a heating body. Nanocrystals are generated in the amorphous alloy ribbon 12 by this heating, and the amorphous alloy ribbon 12 becomes the nanocrystalline alloy ribbon 3.
- the tension applied to the amorphous alloy ribbon 12 be 18 MPa or less. More preferably it is 17 MPa or less. Moreover, it is preferably 3 MPa or more, more preferably 3.5 MPa or more, and even more preferably 5.5 MPa or more.
- the adhesive layer 2 is attached to the nanocrystalline alloy ribbon 3, and when the adhesive layer 2 is attached, tension is applied to the adhesive layer 2 to perform the attachment. After the adhesive layer 2 is attached to the nanocrystalline alloy ribbon 3, the tension applied to the adhesive layer 2 is released and the adhesive layer 2 tends to shrink. Then, stress is applied to the nanocrystalline alloy ribbon 3 in the direction in which it tends to shrink.
- the amorphous alloy ribbon 12 by applying tension to the amorphous alloy ribbon 12 and performing heat treatment, it is possible to suppress characteristic deterioration due to stress in the direction in which the adhesive layer 2 tends to shrink after the adhesive layer 2 is attached. You can expect it. Thereby, deterioration of magnetic properties due to unnecessary stress being applied to the nanocrystalline alloy ribbon 3 can be suppressed.
- a tension of 18 MPa or less is applied to the amorphous alloy ribbon 12 and the amorphous alloy ribbon 12 is introduced into the heating body.
- FIG. 2 a heating roller 16, a ribbon pressing metal belt 19 acting as a ribbon pressing member, and a process upstream side belt supporting the ribbon pressing metal belt 19, which can be used in the heat treatment process of this embodiment, are shown.
- a first roller 17 and a second roller 18 on the downstream side of the process are shown.
- the ribbon pressing metal belt 19 is an example of means for keeping the amorphous alloy ribbon 12 pressed against the heating roller 16.
- the amorphous alloy ribbon 12 is passed between the heating roller 16 and the ribbon pressing metal belt 19, and the amorphous alloy ribbon 12 is heated while being pressed against the heating roller 16.
- the arrows in FIG. 2 indicate the movements of each part, and the heating roller 16 and the first and second rollers 17 and 18 have a rotating structure. As a result, the amorphous alloy ribbon 12 is heated while being conveyed and pressed against the heating roller 16.
- the ribbon 12 after being heated by the heating roller 16 becomes the nanocrystalline alloy ribbon 3.
- the temperature of the ribbon pressing metal belt 19 (i.e., the temperature when in contact with the ribbon 12) is set to be equal to or slightly lower than the heating temperature of the ribbon 12. It is preferable to set it as temperature.
- the temperatures of the first and second rollers 17 and 18 may be set to an appropriate temperature for the ribbon pressing metal belt 19. For example, it is also desirable to set the temperature of the first and second rollers 17 and 18 to be about 50° C. higher than the temperature of the heating roller 16.
- the temperature of the ribbon pressing metal belt 19 and the first and second rollers 17 and 18 can be selected to be suitable for heat treatment of the ribbon 12.
- a first guide slope 41 on the upstream side of the process and a second guide slope 42 on the downstream side of the process for the ribbon 12 are shown.
- the heating roller 16 can be fed to the heating roller 16 so as to simultaneously contact the heating roller 16, and can be discharged as well. That is, by adjusting the inclination angles of the first and second guide slopes 41 and 42 and setting the supply and discharge angles of the amorphous alloy ribbon 12, the front and back surfaces of the amorphous alloy ribbon 12 are simultaneously heated.
- the first and second guide slopes 41 and 42 are arranged so that the extension lines of the first and second guide slopes 41 and 42 and the tangent to the heating roller 16 coincide with each other.
- the front and back surfaces of the amorphous alloy ribbon 12 refer to the first surface of the amorphous alloy ribbon 12 and the second surface opposite to the first surface.
- the thin strip presser metal belt 19 is an example of a flexible member, and the flexible member is preferably a metal member from the viewpoint of flexibility and strength.
- the flexible member is preferably a metal member from the viewpoint of flexibility and strength.
- a flexible member in this embodiment, the ribbon pressing metal belt 19
- the amorphous alloy ribbon 12 is heated.
- the structure is such that the amorphous alloy ribbon 12 is pressed against the heating roller 16, so that the amorphous alloy ribbon 12 is pressed against the heating roller 16. It is preferable that the amorphous alloy ribbon 12 is brought into close contact with the heating roller 16 by the ribbon pressing metal belt 19, and that the amorphous alloy ribbon 12, the ribbon pressing metal belt 19, and the heating roller 16 move integrally. .
- the heating roller 16 is an example of a heating body (heating body of the present disclosure) that directly contacts and heats the amorphous alloy ribbon 12.
- the amorphous alloy ribbon 12 comes into contact with a part of the outer peripheral surface (that is, a part of the circumferential area) of the cylindrical heating roller 16 and is heated.
- the heating roller 16 may have a driving force for transporting the amorphous alloy ribbon 12.
- the roller for driving the thin ribbon pressing metal belt 19 may be both the first and second rollers 17 and 18, or either one of them may be used.
- the second roller 18 on the downstream side of the process may have a driving force
- the first roller 17 on the upstream side of the process may be mechanically dependent.
- the heating roller 16 is an example of a heating body having a convex surface for heating the amorphous alloy ribbon 12 by contacting it therewith.
- the term "convex surface” refers to a surface raised toward the amorphous alloy ribbon 12 side, and is a curved surface formed by a cylindrical (or cylindrical) side surface, or a substantially D-shaped surface, as in the case of the heating roller 16 shown in FIG.
- the member may have a curved surface configured as a part of the member, such as a curved surface portion of the member, and any shape that allows the amorphous alloy ribbon 12 to follow and ensure sufficient contact may be used.
- the heating body of the present disclosure may be configured not to rotate, or the thin ribbon 12 may be configured to move (that is, slide) on the heating body.
- a ribbon pressing roller can also be used as the ribbon pressing member. Note that it is preferable to use a heating roller that can also heat the ribbon pressing roller.
- a substantially D-shaped heating body is used instead of the heating roller 16, and a ribbon pressing metal belt and the ribbon pressing metal belt are used as means for pressing the amorphous alloy ribbon 12 against the heating body. It may also be configured to include a supporting roller. In this case, the heating body may have a fixed structure, and the amorphous alloy ribbon 12 may slide on the heating body. Note that the amorphous alloy ribbon 12 is pressed against the heating body by a ribbon pressing metal belt. As a result, the amorphous alloy ribbon 12 is heated while being conveyed and pressed against the heating body.
- the temperature increase rate of the amorphous alloy ribbon 12 is 50° C./sec to 4000° C./sec.
- the heating rate to achieve a fine nanocrystalline structure differs depending on the composition, but a composition with low Cu, low M element, and high Fe content can obtain a high saturation magnetic flux density. A faster heating rate is required.
- the lower limit of the temperature increase rate is 50° C./sec
- the upper limit is the equipment capacity of the heat treatment equipment, the temperature of the heating body and the ribbon pressing member, the heating body, the ribbon pressing member, and the ribbon 12.
- it can be determined depending on the state of contact between the two, it is substantially about 4000° C./second.
- it is 500°C/sec or more.
- the heating body has a width wider than the width of the amorphous alloy ribbon 12.
- the ribbon pressing member also has a width wider than the width of the amorphous alloy ribbon 12. As a result, when the amorphous alloy ribbon 12 is pressed against the heating body, the entire width of the ribbon 12 tends to come into close contact with the heating body.
- the distance from when the amorphous alloy ribbon 12 comes into contact with the heating body to when it leaves the heating body is 50 mm or more in terms of the length of the surface of the heating body. It is preferable that Further, it is more preferable that the distance from when this amorphous alloy ribbon 12 comes into contact with the heating body to when it leaves the heating body is 150 mm or more in terms of the length of the heating body surface. This distance corresponds to the distance that the amorphous alloy ribbon 12 moves from when it comes into contact with the heating element to when it leaves the heating element.
- the conveying speed of the amorphous alloy ribbon 12 is preferably 1 m/min or more. In mass production, the higher the transport speed, the higher the production volume, so the transport speed is more preferably 10 m/min or more.
- the contact time between the amorphous alloy ribbon 12 and the heating body is preferably 0.1 seconds to 30 seconds.
- the lower limit of the contact time is more preferably 0.2 seconds
- the upper limit of the contact time is more preferably 10 seconds, even more preferably 5 seconds, and most preferably 2 seconds.
- the contact time is preferably 0.2 seconds to 2 seconds.
- the heat treatment method of the present disclosure by pressing the amorphous alloy ribbon 12 against the heating body, the contact between the heating body and the ribbon 12 is improved, heat transferability is improved, and the temperature increase rate is improved.
- more of the heat generated by crystallization can be released to the heating element and the ribbon holding metal (belt or roller), suppressing the maximum temperature of the ribbon 12 (i.e. self-heating). ) can suppress temperature rises caused by
- by pressing the ribbon 12 with a ribbon pressing member (belt or roller) wrinkles or streaks that tend to occur during crystallization can be suppressed. This allows heat treatment at a higher temperature, a faster temperature increase rate, and a short contact time. Therefore, productivity can be improved and a uniform nanocrystalline structure can be obtained, and a nanocrystalline alloy ribbon 3 having a higher saturation magnetic flux density and excellent magnetic properties can be obtained.
- the pressure with which the amorphous alloy ribbon 12 is pressed against the heating body is preferably 0.03 MPa or more.
- the pressing pressure is more preferably 0.04 MPa or more, still more preferably 0.05 MPa or more, and still more preferably 0.07 MPa or more.
- the heating body is given a curvature.
- the radius of curvature of the heating body is preferably 25 mm or more.
- the nanocrystalline alloy ribbon 3 is transported to the step of attaching the adhesive layer 2. This will be explained below using FIGS. 3 to 7.
- 3 and 4 are cross-sectional views for explaining the structure of the adhesive layer 2, and are cross-sectional views taken in a direction intersecting (for example, perpendicular to) the longitudinal direction of the adhesive layer 2.
- 5 to 7 are cross-sectional views for explaining the structure of the magnetic sheet 100, and are cross-sectional views taken in a direction intersecting (for example, perpendicular to) the longitudinal direction of the magnetic sheet 100.
- the adhesive layer 2 includes a support 21 and adhesives 22 provided on both sides of the support 21, respectively. More specifically, the adhesive 22 is provided in the form of a film or layer on each of the first surface 11A and second surface 11B of the support 21. Then, in the adhesive layer 2, the protective sheet 4 is pasted on the adhesive 22 on the first surface 11A of the support 21, and the liner 6 is pasted on the adhesive 22 on the second surface 11B of the support 21.
- the support body 21 is a strip-shaped membrane member formed in an elongated shape, for example, a membrane member formed in a rectangular shape.
- the support body 21 is formed using a flexible resin material.
- polyethylene terephthalate PET
- PET polyethylene terephthalate
- a pressure-sensitive adhesive can be used as the adhesive 22.
- known adhesives such as acrylic adhesive, silicone adhesive, urethane adhesive, synthetic rubber, natural rubber, etc. can be used as the adhesive 22.
- Acrylic adhesives are preferable as the adhesive 22 because they have excellent heat resistance and moisture resistance, and can be bonded to a wide range of materials.
- an adhesive layer 2 in which the total thickness of the adhesive 22 on the first surface 11A of the support 21, the support 21, and the adhesive 22 on the second surface 11B of the support 21 is 3 ⁇ m. can.
- the adhesive layer 2 can be attached to another member.
- the adhesive layer 2 is unwound from the roll 72 on which the adhesive layer 2 is wound, and the protective sheet is attached to the adhesive 22 on the first surface 11A of the support 21 in the adhesive layer 2. 4 is peeled off to expose the adhesive 22 on the first surface 11A.
- This state is shown in FIG.
- the adhesive layer 2 with the adhesive 22 exposed on the first surface 11A and the nanocrystalline alloy ribbon 3 are transported and guided to the pasting roller 71, respectively.
- the nanocrystalline alloy ribbon 3 is pasted to the adhesive layer 2 with the adhesive 22 exposed on the first surface 11A.
- the pasted state is shown in FIG.
- the adhesive layer 2 is conveyed under tension
- the nanocrystalline alloy ribbon 3 is also conveyed under tension.
- the adhesive layer 2 and the nanocrystalline alloy ribbon 3 are attached to each other.
- the nanocrystalline alloy ribbon 3 passes through a ribbon end face aligning device 61, and then passes through a ribbon end face detection unit 62, so that the ribbon end face of the nanocrystalline alloy ribbon 3 is After the adjustment, pasting with the adhesive layer 2 is performed. Thereby, the positional relationship between the nanocrystalline alloy ribbon 3 and the adhesive layer 2 is adjusted, and the adhesion is performed.
- the ribbon end face alignment device 61 includes a mechanism that moves and aligns the nanocrystalline alloy ribbon 3 so as to tilt it in the width direction.
- a magnetic sheet 100 made of a nanocrystalline alloy ribbon 3 with an adhesive layer 2 pasted on one side can be produced as shown in FIG.
- a magnetic sheet 100 to which a nanocrystalline alloy ribbon 3 and an adhesive layer 2 are attached is conveyed to a cracking process by a cracking roller 81.
- the magnetic sheet 100 may be wound into a coil shape without performing the cracking process.
- the magnetic sheet 100 may be cut to a desired length.
- the magnetic sheet 100 shown in FIG. 1 includes one layer of nanocrystalline alloy ribbon 3. A plurality of these magnetic sheets 100 may be used and laminated to produce a magnetic sheet on which nanocrystalline alloy ribbons 3 are laminated. In this case, the liner 6 of the magnetic sheet 100 described above is peeled off and another nanocrystalline alloy ribbon 3 is attached and laminated to form a magnetic sheet in which multilayer nanocrystalline alloy ribbons 3 are laminated.
- FIG. 7 shows the positional relationship between the nanocrystalline alloy ribbon 3 and the adhesive layer 2 in the magnetic sheet 100 according to an embodiment of the present disclosure. It is preferable that the nanocrystalline alloy ribbon 3 and the adhesive layer 2 have shapes that satisfy the following relationship. (See Figure 7) 0.2mm ⁇ (Width A-Width B) ⁇ 3mm
- the width A is a dimension related to the adhesive layer 2, and more preferably a dimension related to a region of the adhesive layer 2 provided with the adhesive 22 to which the nanocrystalline alloy ribbon 3 is adhered.
- the width B is a dimension with respect to the nanocrystalline alloy ribbon 3. Note that when the adhesive 22 is provided on the entire surface of the support 21 of the adhesive layer 2, the width A is a dimension related to the adhesive layer 2 or the support 21.
- the lower limit of (width A - width B) is preferably 0.5 mm, more preferably 1.0 mm.
- the upper limit of (width A-width B) is preferably 2.5 mm, more preferably 2.0 mm.
- the nanocrystalline alloy ribbon 3 may be arranged so that its center coincides with the adhesive layer 2 in the width direction, or it may be arranged at a distance from its center. In this case, they are arranged so as to satisfy the relationships of 0 mm ⁇ gap a and 0 mm ⁇ gap b (see FIG. 7).
- Gap a and gap b are the distances from the end of the adhesive layer 2 to the end of the nanocrystalline alloy ribbon 3. Specifically, the gap a is the distance from the first adhesive layer end 10X of the adhesive layer 2 to the first ribbon end 20X of the nanocrystalline alloy ribbon 3. The gap b is the distance from the second adhesive layer end 10Y of the adhesive layer 2 to the second ribbon end 20Y of the nanocrystalline alloy ribbon 3.
- the first ribbon end 20X is the end of the nanocrystalline alloy ribbon 3 on the same side as the first adhesive layer end 10X.
- the second adhesive layer end 10Y is the end of the adhesive layer 2 opposite to the first adhesive layer end 10X.
- the second ribbon end 20Y is the end of the nanocrystalline alloy ribbon 3 on the same side as the second adhesive layer end 10Y.
- the width A, the width B, the gap a, and the gap b are dimensions in a direction intersecting with the longitudinal direction of the magnetic sheet 100, and more preferably in a direction perpendicular to the longitudinal direction of the magnetic sheet 100.
- the longitudinal direction of the magnetic sheet 100 and the longitudinal direction of the adhesive layer 2 are the same direction. Further, the longitudinal direction of the magnetic sheet 100 and the longitudinal direction of the nanocrystalline alloy ribbon 3 are the same direction.
- the adhesive 22 of the adhesive layer 2 can be easily placed over the entire surface of the nanocrystalline alloy ribbon 3.
- the area where the adhesive 22 is not placed on the nanocrystalline alloy ribbon 3 can be Easy to prevent occurrence.
- the value obtained by subtracting the width B from the width A to 3 mm or less it is easy to prevent the portion of the magnetic sheet 100 where the nanocrystalline alloy ribbon 3 is not arranged from becoming large.
- the magnetic sheets 100 are arranged in parallel, it is easy to prevent the interval (magnetic gap) between the nanocrystalline alloy ribbons 3 from increasing.
- the nanocrystalline alloy ribbon 3 is separated from the area where the adhesive 22 is provided. Protrusion is prevented. Therefore, it is easy to prevent the occurrence of a portion of the nanocrystalline alloy ribbon 3 where the adhesive 22 is not placed. This can prevent the small pieces from falling off after cracks are formed in the nanocrystalline alloy ribbon 3 and small pieces are formed.
- the adhesive layer 2 is present between the nanocrystalline alloy ribbon 3 and other nanocrystalline alloy ribbons 3 or other materials without fail, which improves insulation and adhesive properties. It is possible to ensure sex. ⁇ Crack process> It is preferable to provide a cracking process after the pasting process.
- a cracking roller 81 is pressed against the nanocrystalline alloy ribbon 3 to form a crack 5 in the nanocrystalline alloy ribbon 3.
- the cracking roller 81 has a predetermined protrusion on its surface.
- the convex portion directly applies an external force to the nanocrystalline alloy ribbon 3, thereby forming a crack 5 in the nanocrystalline alloy ribbon 3. Since the cracking roller 81 is brought into direct contact with the nanocrystalline alloy ribbon 3, the cracks 5 can be easily formed.
- a press roller is provided on the adhesive layer 2 side of the nanocrystalline alloy ribbon 3. A cross-sectional view showing the structure in which the crack 5 is formed is shown in FIG.
- the magnetic sheet 100 is passed through a nip roller unit 82 and a flattening roller unit 83 and wound up into a roll 9.
- the process using the flattening roller unit 83 is a process in which the magnetic sheet 100 is sandwiched between rollers in order to flatten the uneven state caused by the cracking process on the magnetic sheet 100. That is, the process using the flattening roller unit 83 is to pass the magnetic sheet 100 between rollers to which a predetermined pressure is set.
- the predetermined pressure is preferably 0.1 to 1.0 MPa.
- One embodiment of the present disclosure is a method for manufacturing a magnetic sheet 100 in which an adhesive layer 2 is attached to one surface of a nanocrystalline alloy ribbon 3, the magnetic sheet 100 being wound into a coil shape for the nanocrystalline alloy ribbon 3.
- the amorphous alloy ribbon 12 is prepared, the amorphous alloy ribbon 12 is unwound from the coiled body 11, and the amorphous alloy ribbon 12 is successively subjected to a heat treatment process and a pasting process.
- a single unwinding process performs the heat treatment step and the pasting step.
- the number of times of winding and unwinding can be reduced, and a highly productive magnetic sheet manufacturing method can be obtained.
- a magnetic sheet 100 made of the crystalline alloy ribbon 3 can be manufactured. Thereby, a method for manufacturing the magnetic sheet 100 with high productivity can be obtained.
- the amorphous alloy ribbon 12 in the heat treatment process, is heated while being sandwiched between a heating body and a ribbon pressing member. Further, the amorphous alloy ribbon 12 is heated while being pressed against the heating element by a ribbon pressing member that contacts the surface opposite to the surface of the amorphous alloy ribbon 12 that contacts the heating element. In this way, by heating the amorphous alloy ribbon 12 while sandwiching and pressing it, the amorphous alloy ribbon 12 can be heated uniformly. Thereby, a nanocrystalline alloy ribbon 3 with excellent magnetic properties can be obtained.
- the nanocrystalline alloy ribbon 3 with excellent isotropy can be obtained by heating with the amorphous alloy ribbon 12 sandwiched and pressed.
- the magnetic flux density B80 L when a magnetic field of 80 A/m is applied in the longitudinal direction of the magnetic sheet 100 made from the nanocrystalline alloy ribbon 3 of the present disclosure and the magnetic flux density B80 L when a magnetic field of 80 A/m is applied in the width direction perpendicular to the longitudinal direction.
- the ratio (B80 L /B80 W ) of the magnetic flux density B80 W at that time is 0.60 to 1.40, and that both B80 L and B80 W are 0.1 T or more.
- the ratio (B80 L /B80 W ) is more preferably 0.70 to 1.30.
- both B80 L and B80 W are 0.4 T or more, and more preferably 0.5 T or more.
- the heat treatment of the present disclosure by sandwiching and pressing the amorphous alloy ribbon 12, it is possible to suppress the occurrence of wrinkles or streaks. Furthermore, it also has the effect of correcting wrinkles caused by uneven cooling during casting of the amorphous alloy ribbon 12. As a result, according to the present disclosure, wrinkles or streaks are suppressed, and a nanocrystalline alloy ribbon 3 with good flatness can be obtained.
- the nanocrystalline alloy ribbon 3 of the present disclosure is represented by the composition formula (Fe 1-x A x ) a Si b B c Cu d Me , where A is at least one of Ni and Co, and M is At least one element selected from Nb, Mo, V, Zr, Hf and W, in atomic %, 72.0 ⁇ a ⁇ 81.0, 9.0 ⁇ b ⁇ 18.0, 5.0 It is preferable that ⁇ c ⁇ 10.0, 0.02 ⁇ d ⁇ 1.5, 0.1 ⁇ e ⁇ 3.5, and 0 ⁇ x ⁇ 0.1.
- the heating body heats the amorphous alloy ribbon 12 at a temperature of Tx1+80°C or more and Tx1+230°C or less. Preferably, it is heated to a temperature Ta.
- the nanocrystalline alloy ribbon 3 of the present disclosure preferably has a thickness of 25 ⁇ m or less, more preferably 20 ⁇ m or less. Further, the thickness is preferably 5 ⁇ m or more, and more preferably 10 ⁇ m or more.
- the nanocrystalline alloy ribbon 3 of the present disclosure preferably has a width of 10 mm or more, more preferably 30 mm or more, and still more preferably 50 mm or more.
- the width of the nanocrystalline alloy ribbon 3 of the present disclosure becomes too wide, stable production becomes difficult, so the width is preferably 500 mm or less. Moreover, it is more preferably 400 mm or less.
- the nanocrystalline alloy ribbon 3 of the present disclosure has a saturation magnetic flux density Bs of 1.15T or more.
- the saturation magnetic flux density Bs is preferably 1.20T or more, further preferably 1.35T or more, further preferably 1.36T or more, further preferably 1.37T or more, and still more preferably 1.40T or more. .
- Example 1 Element sources were blended so that the alloy composition would be Fe 76.8 Si 14.0 B 8.0 Cu 0.7 Nb 0.5 , heated to 1350°C to produce a molten alloy, and the molten alloy was
- the amorphous alloy ribbon 12 was produced by ejecting it onto a cooling roller with an outer diameter of 400 mm and a width of 200 mm that rotates at a speed of 30 m/sec, and rapidly solidifying it on the cooling roller.
- the outer circumferential portion of the cooling roller is made of a Cu alloy with a thermal conductivity of 150 W/(m ⁇ K), and is provided with a cooling mechanism for controlling the temperature of the outer circumferential portion.
- This amorphous alloy ribbon 12 had a width of 50 mm and a thickness of 16.4 ⁇ m.
- This amorphous alloy ribbon 12 was wound up to form a coiled body 11.
- the amorphous alloy ribbon 12 was introduced into the heating roller 16 at tensions of 3.1 MPa, 5.0 MPa, 6.3 MPa, 12.5 MPa, 15.0 MPa, and 17.5 MPa.
- the heating roller 16 is heated to 660° C.
- the conveyance speed of the ribbon 12 is 50 mm/sec
- the contact time between the ribbon 12 and the heating roller 16 is 1.2 seconds
- the ribbon is held down by the ribbon pressing member. 12 was pressed against the heating roll 16 at a pressure of 0.115 MPa.
- the adhesive layer 2 used had a thickness of 3 ⁇ m (adhesive 22 on the first surface 11A of the support 21+adhesive 22 on the second surface 11B of the support 21).
- a magnetic sheet 100 having one layer of nanocrystalline alloy ribbons 3 was produced, and five of these magnetic sheets 100 were laminated to produce a magnetic sheet having five layers of nanocrystalline alloy ribbons 3.
- a cracked magnetic sheet 100 was produced using the cracking process shown in FIG.
- Five cracked magnetic sheets 100 were laminated to produce a magnetic sheet having five layers of nanocrystalline alloy ribbons 3.
- the properties of these five-layer magnetic sheets were evaluated. The evaluation results are shown in Table 1.
- the tension of the amorphous alloy ribbon 12 is preferably 17 MPa or less. Further, in order to obtain a good ratio B80 L /B80 W , the tension of the amorphous alloy ribbon 12 is preferably 3.5 MPa or more, and more preferably 5.5 MPa or more.
- [Saturation magnetic flux density Bs] A magnetic field of 8000 A/m was applied to a single plate sample of the nanocrystalline alloy ribbon 3 after heat treatment using a DC magnetization characteristic testing device manufactured by Metron Giken Co., Ltd., and the maximum magnetic flux density at that time was measured and designated as Bs.
- the nanocrystalline alloy ribbon 3 of the present disclosure has a characteristic of being relatively easily saturated, so it is saturated when a magnetic field of 8000 A/m is applied, and the saturation magnetic flux density Bs is almost the same as B8000 , so the saturation magnetic flux The density Bs is expressed as B8000 .
- Magnetic flux density B80 A magnetic field of 80 A/m was applied in the longitudinal direction (i.e., casting direction) and the width direction perpendicular to the longitudinal direction of the magnetic sheet using a DC magnetization characteristic testing device manufactured by Metron Giken Co., Ltd., and the maximum magnetic flux density at that time was determined as B80. L and B80 W , the ratio B80 L /B80 W was calculated, and the isotropy was evaluated.
- Average grain size The average crystal grain size was determined from the Scherrer equation using the integral width of the diffraction peak from the (110) plane in the X-ray diffraction pattern obtained from the X-ray diffraction experiment.
- the integral width of the diffraction peak from the (110) plane is obtained by performing peak decomposition using the pseudo-Voigt function for the diffraction pattern, where D is the average particle diameter, ⁇ is the integral width, ⁇ is the diffraction angle, and K is the Scherrer constant.
- D is the average particle diameter
- ⁇ is the integral width
- ⁇ is the diffraction angle
- K is the Scherrer constant.
- the volume fraction is the volume fraction of nanocrystals, and portions other than nanocrystals are amorphous portions.
- This volume fraction is determined by the ratio of the integrated intensity of the diffraction peak from the (110) plane of Fe to the integrated intensity of the halo pattern.
- the integrated intensity of the peak exhibited by nanocrystals and the halo pattern exhibited by amorphous is determined by performing peak decomposition using a pseudo-Voigt function for the X-ray diffraction pattern.
- Ic and Ia also include the integrated intensity of Fe 2 B, which is precipitated in small amounts. Can be included.
- a method for manufacturing a magnetic sheet with high productivity by reducing the number of unwinding and winding operations was obtained.
- a magnetic sheet comprising nanocrystalline alloy ribbons with excellent magnetic properties and good isotropy.
- a nanocrystalline alloy ribbon with Bs of 1.15T or more can be obtained, and both B80 L and B80 W are 0.10T or more.
- a magnetic sheet with good isotropic properties was obtained.
- a magnetic sheet with a ratio B80 L /B80 W in the range of 0.60 to 1.40 was obtained.
- a magnetic sheet with a low coercive force Hc and excellent magnetic properties was obtained.
- nanocrystalline alloy ribbon having a structure in which crystal grains having an average crystal grain size of 50 nm or less are present in an amorphous phase was obtained.
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Abstract
Description
前記熱処理工程は、コイル状に巻かれた前記アモルファス合金薄帯から前記アモルファス合金薄帯を巻き出して、前記アモルファス合金薄帯を搬送しながら加熱体に接触させ、前記アモルファス合金薄帯の前記加熱体に接触する面の反対面に薄帯押え部材を接触させることで、前記アモルファス合金薄帯を前記加熱体に押え付けた状態で加熱し、前記アモルファス合金薄帯に18MPa以下の張力を加えて前記加熱体に導入し、
前記貼り付け工程は、前記熱処理工程から搬送されてきた前記ナノ結晶合金薄帯を搬送しながら、前記ナノ結晶合金薄帯の前記一方の面に粘着層を貼り付ける。
<熱処理工程>
本開示の熱処理方法は、アモルファス合金薄帯12を加熱体に接触させて加熱する方法である。アモルファス合金薄帯12を加熱体に接触させて加熱するとき、アモルファス合金薄帯12は搬送されるとともに、アモルファス合金薄帯12の加熱体に接触する面の反対面に薄帯押え部材を接触させ、アモルファス合金薄帯12を加熱体に押え付けた状態で加熱する。
<貼り付け工程>
熱処理工程の後、ナノ結晶合金薄帯3は、粘着層2の貼り付け工程へ搬送される。以下、図3から図7を用いて説明する。図3、図4は、粘着層2の構成を説明するため断面視図であり、粘着層2の長手方向と交差する方向(例えば、直交する方向)での断面視図である。図5から図7は、磁性シート100の構成を説明するため断面視図であり、磁性シート100の長手方向と交差する方向(例えば、直交する方向)での断面視図である。
0.2mm≦(幅A-幅B)≦3mm
幅Aは、粘着層2に関する寸法であって、より好ましくは粘着層2におけるナノ結晶合金薄帯3が接着される粘着剤22が設けられた領域に関する寸法である。幅Bは、ナノ結晶合金薄帯3に関する寸法である。なお、粘着剤22が粘着層2の支持体21の全面に設けられている場合には、幅Aは、粘着層2または支持体21に関する寸法である。
<クラック工程>
貼り付け工程の後、クラック工程を設けることが好ましい。
〔実施例1〕
合金組成がFe76.8Si14.0B8.0Cu0.7Nb0.5となるように元素源を配合し、1350℃に加熱して合金溶湯を作製し、その合金溶湯を周速30m/秒で回転する外径400mm、幅200mmの冷却ローラ上に噴出させ、冷却ローラ上で急冷凝固させて、アモルファス合金薄帯12を作製した。なお、冷却ローラの外周部は、熱伝導率が150W/(m・K)のCu合金で構成されており、内部には外周部の温度制御用の冷却機構を備えている。
〔飽和磁束密度Bs〕
メトロン技研株式会社製の直流磁化特性試験装置にて熱処理後のナノ結晶合金薄帯3の単板試料に磁界8000A/mを印加し、その時の最大磁束密度を測定し、Bsとする。本開示のナノ結晶合金薄帯3は、比較的飽和しやすい特性であるため、磁界8000A/m印加時点で飽和しており、B8000と飽和磁束密度Bsがほぼ同じ値となるため、飽和磁束密度BsをB8000で表す。
〔磁束密度B80〕
メトロン技研株式会社製の直流磁化特性試験装置にて磁性シートの長手方向(すなわち、鋳造方向)および長手方向と直交する幅方向にそれぞれ磁界80A/mを印加し、その時の最大磁束密度をそれぞれB80L、B80Wとし、比B80L/B80Wを算出し、等方性の評価をおこなった。
〔平均結晶粒径〕
平均結晶粒径はX線回折実験から得られたX線回折パターン中の(110)面からの回折ピークの積分幅を用いて、シェラーの式から求めた。(110)面からの回折ピークの積分幅は回折パターンに対する擬Voigt関数を用いたピーク分解を行うことによって求め、平均粒径をD、積分幅をβ、回折角をθ、シェラー定数をK、X線の波長をλとすると、以下で与えられるシェラーの式(数1)からDが求まる。ただし今回の場合、X線の波長λ=0.154050nm、シェラー定数K=1.333を仮定として適用した。また積分幅は、装置由来の回折線幅の広がり分だけ積分幅が狭くなるように補正した値を用いている。
本開示の実施例によれば、巻き出し、巻き取りの回数を減らし、生産性の高い磁性シートの製造方法が得られた。また、優れた磁気特性を備えるとともに、良好な等方性を備えたナノ結晶合金薄帯を備える磁性シートを製造することができた。例えば、Bsが1.15T以上のナノ結晶合金薄帯が得られ、また、B80L、B80Wがいずれも0.10T以上である。また、本開示によれば、良好な等方性の特性が得られる磁性シートが得られた。また、比B80L/B80Wが0.60~1.40の範囲の磁性シートが得られた。また、保磁力Hcが低く、優れた磁気特性を示す磁性シートが得られた。
Claims (14)
- アモルファス合金薄帯に熱処理を行い、ナノ結晶合金薄帯を作製する熱処理工程と、前記ナノ結晶合金薄帯の一方の面に粘着層を貼り付ける貼り付け工程と、を備える磁性シートの製造方法であって、
前記熱処理工程は、コイル状に巻かれた前記アモルファス合金薄帯から前記アモルファス合金薄帯を巻き出して、前記アモルファス合金薄帯を搬送しながら加熱体に接触させ、前記アモルファス合金薄帯の前記加熱体に接触する面の反対面に薄帯押え部材を接触させることで、前記アモルファス合金薄帯を前記加熱体に押え付けた状態で加熱し、前記アモルファス合金薄帯に18MPa以下の張力を加えて前記加熱体に導入し、
前記貼り付け工程は、前記熱処理工程から搬送されてきた前記ナノ結晶合金薄帯を搬送しながら、前記ナノ結晶合金薄帯の前記一方の面に前記粘着層を貼り付ける、磁性シートの製造方法。 - 前記貼り付け工程の後に、前記ナノ結晶合金薄帯を搬送しながら、前記ナノ結晶合金薄帯の前記一方の面の反対面に直接クラッキングローラを接触させて、前記ナノ結晶合金薄帯の前記反対面を前記クラッキングローラにより加圧し、前記ナノ結晶合金薄帯にクラックを形成するクラック工程を備える、請求項1に記載の磁性シートの製造方法。
- 前記貼り付け工程の後に、前記磁性シートをコイル状に巻き取る、請求項1に記載の磁性シートの製造方法。
- 前記クラック工程の後に、前記磁性シートをコイル状に巻き取る、請求項2に記載の磁性シートの製造方法。
- 前記アモルファス合金薄帯を前記加熱体に接触させて加熱するとき、前記アモルファス合金薄帯の昇温速度が50℃/秒~4000℃/秒である、請求項1から請求項4のいずれか1項に記載の磁性シートの製造方法。
- 前記アモルファス合金薄帯の前記加熱体との接触時間が0.1秒~30秒である、請求項1から請求項5のいずれか1項に記載の磁性シートの製造方法。
- 前記ナノ結晶合金薄帯は平均結晶粒径が50nm以下の結晶粒がアモルファス相中に存在する組織を有する、請求項1から請求項6のいずれか1項に記載の磁性シートの製造方法。
- 前記粘着層は、帯状に形成された支持体と前記支持体の両面に設けられた粘着剤とを有し、
前記粘着層に関する寸法であって、前記粘着層の長手方向と交差する方向の寸法を幅A、前記ナノ結晶合金薄帯に関する寸法であって、前記ナノ結晶合金薄帯の長手方向と交差する方向の寸法を幅Bとした場合に、
0.2mm≦(幅A-幅B)≦3mmの関係を満たす、請求項1から請求項7のいずれか1項に記載の磁性シートの製造方法。 - 前記ナノ結晶合金薄帯に前記粘着層を貼り付ける前に、前記ナノ結晶合金薄帯の端面を整列する装置を設ける請求項1から請求項8のいずれか1項に記載の磁性シートの製造方法。
- 前記ナノ結晶合金薄帯は、組成式(Fe1-xAx)aSibBcCudMeで表され、AはNiおよびCoの少なくとも1種であり、MはNb、Mo、V、Zr、HfおよびWから選ばれた少なくとも1種であり、原子%で72.0≦a≦81.0、9.0≦b≦18.0、5.0≦c≦10.0、0.02≦d≦1.5、0.1≦e≦3.5、0≦x≦0.1である請求項1から請求項9のいずれか1項に記載の磁性シートの製造方法。
- 前記アモルファス合金薄帯の昇温速度20K/分で測定したbccFe結晶化開始温度をTx1℃としたとき、前記加熱体は、Tx1+80℃以上、Tx1+230℃以下の加熱温度Taに加熱される請求項1から請求項10のいずれか1項に記載の磁性シートの製造方法。
- 前記アモルファス合金薄帯を前記加熱体に押え付ける圧力が0.03MPa以上である請求項1から請求項11のいずれか1項に記載の磁性シートの製造方法。
- 前記ナノ結晶合金薄帯は、飽和磁束密度Bsが1.15T以上である請求項1から請求項12のいずれか1項に記載の磁性シートの製造方法。
- 前記磁性シートの長手方向に磁界80A/m印加したときの磁束密度B80Lと、前記長手方向に直交する幅方向に磁界80A/m印加したときの磁束密度B80Wと、の比(B80L/B80W)が0.60~1.40であり、かつB80L、B80Wともに0.1T以上である請求項1から請求項13のいずれか1項に記載の磁性シートの製造方法。
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- 2023-03-29 JP JP2024512732A patent/JPWO2023190770A1/ja active Pending
- 2023-03-29 CN CN202380031761.0A patent/CN118974848A/zh active Pending
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| JP2008112830A (ja) | 2006-10-30 | 2008-05-15 | Toshiba Corp | 磁性シートの製造方法 |
| WO2014157526A1 (ja) | 2013-03-28 | 2014-10-02 | 日立金属株式会社 | 磁性シート、それを用いた電子機器、および、磁性シートの製造方法 |
| WO2017150440A1 (ja) * | 2016-02-29 | 2017-09-08 | 日立金属株式会社 | ナノ結晶合金リボンの製造方法 |
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| KR20180115895A (ko) * | 2017-04-14 | 2018-10-24 | 주식회사 다올세라믹 | 자기장 차폐시트의 제조장치에 구비된 열처리장치 |
| WO2020235643A1 (ja) | 2019-05-21 | 2020-11-26 | 日立金属株式会社 | 樹脂フィルム付きナノ結晶合金薄帯の製造方法 |
| WO2022065370A1 (ja) * | 2020-09-25 | 2022-03-31 | 日立金属株式会社 | 非晶質合金リボンの熱処理方法、及び非晶質合金リボンの熱処理装置 |
| WO2022264999A1 (ja) * | 2021-06-16 | 2022-12-22 | 日立金属株式会社 | ナノ結晶合金薄帯の製造方法、およびナノ結晶合金薄帯 |
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| Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4495963A4 (en) | 2026-03-18 |
| CN118974848A (zh) | 2024-11-15 |
| JPWO2023190770A1 (ja) | 2023-10-05 |
| EP4495963A1 (en) | 2025-01-22 |
| US20250232913A1 (en) | 2025-07-17 |
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