KR20140081558A - Magnetic composite sheet and manufacturing method of the same - Google Patents

Magnetic composite sheet and manufacturing method of the same Download PDF

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Publication number
KR20140081558A
KR20140081558A KR1020120151448A KR20120151448A KR20140081558A KR 20140081558 A KR20140081558 A KR 20140081558A KR 1020120151448 A KR1020120151448 A KR 1020120151448A KR 20120151448 A KR20120151448 A KR 20120151448A KR 20140081558 A KR20140081558 A KR 20140081558A
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KR
South Korea
Prior art keywords
magnetic
composite sheet
cover film
ferrite
sintered laminate
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Application number
KR1020120151448A
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Korean (ko)
Inventor
최동혁
한승헌
박정태
안성용
정창렬
Original Assignee
삼성전기주식회사
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Priority to KR1020120151448A priority Critical patent/KR20140081558A/en
Publication of KR20140081558A publication Critical patent/KR20140081558A/en

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • 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
    • 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
    • H01F1/34—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 non-metallic substances, e.g. ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • 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
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention provides a method for manufacturing a magnetic composite sheet comprising the steps of preparing magnetic powder; manufacturing slurry including the magnetic powder, a binder, and dispersant; preparing a green sheet by using the slurry; preparing a sintered laminate by laminating and sintering a plurality of green sheets; attaching cover films on one side or both sides of the sintered laminate; and breaking the sintered laminate into a plurality of small magnetic pieces each having a different size and shape by applying physical pressure in a laminating direction of the sintered laminate.

Description

Magnetic composite sheet and manufacturing method thereof "

The present invention relates to a magnetic composite sheet and a manufacturing method thereof.

2. Description of the Related Art Recently, in order to charge a secondary battery built in a portable terminal or the like, a system for transmitting electric power at a contactless point has been studied.

Generally, a non-contact power transmission device includes a non-contact power transmission device for transmitting electric power and a non-contact power receiving device for receiving and storing electric power.

These contactless power transmission devices transmit and receive electric power using electromagnetic induction. For this purpose, a coil is provided in each of them.

In the case of a contactless power receiving device composed of a circuit part and a coil part, it is attached to a cellular phone case or a cradle-type additional accessory device to exhibit its function.

The operation principle of the contactless power transmission device will be described. The power source of the contactless power transmission device receives the household AC power supplied from the outside.

The inputted household AC power is converted into DC power from the power conversion unit, and then converted to an AC voltage of a specific frequency to provide it to the non-contact transmitting apparatus.

When an AC voltage is applied to the coil part of the non-contact power transmission device, the magnetic field around the coil part is changed.

As the magnetic field of the coil part of the non-contact power receiving device disposed adjacent to the non-contact power transmitting device changes, the coil part of the non-contact power receiving device outputs power to charge the secondary battery.

Such a non-contact power transmission device places the magnetic sheet between the RF antenna and the metal battery to increase the communication distance.

In the conventional case, before the sintering of the ferrite sheet, at least one continuous U-shaped or V-shaped groove is formed, and a ferrite substrate is laminated between the adhesive film and the PET film after sintering to produce a flexible ferrite substrate.

Korean Unexamined Patent Application Publication No. 2012-0065486

The present invention aims to provide a magnetic composite sheet having a simple manufacturing process and flexibility and a manufacturing method thereof.

One embodiment of the present invention is a method of manufacturing a magnetic powder, comprising: preparing a magnetic powder; Preparing a slurry comprising the magnetic powder, a solvent, a binder and a dispersing agent; Providing a green sheet using the slurry; Stacking a plurality of the green sheets and then sintering to form a sintered laminate; Attaching a cover film to one side or both sides of the sintered laminate; And breaking the sintered laminate into a plurality of pieces of a plurality of magnetic bodies having different sizes and shapes by applying a physical pressure in the stacking direction of the sintered laminate; The present invention also provides a method of producing a magnetic composite sheet including the magnetic composite sheet.

The piece of the magnetic body may include at least one of a metal powder, a metal flake, and a ferrite.

The metal powder and metal flake may be selected from the group consisting of Fe, Si-Fe-Si alloys, Fe-Si-Al alloys, Fe-Si- ) Alloy and a nickel-iron-molybdenum (Ni-Fe-Mo) alloy.

The ferrite may include nickel-zinc-copper (Ni-Zn-Cu) or manganese-zinc (Mn-Zn).

The cover film may include polyethylene terephthalate (PTE).

Another embodiment of the present invention is a magnetic recording medium comprising: a magnetic layer including a plurality of pieces of a magnetic substance having different sizes and shapes; And a cover film formed on one surface or both surfaces of the magnetic material layer.

The piece of the magnetic body may include at least one of a metal powder, a metal flake, and a ferrite.

The metal powder and metal flake may be selected from the group consisting of Fe, Si-Fe-Si alloys, Fe-Si-Al alloys, Fe-Si- ) Alloy and a nickel-iron-molybdenum (Ni-Fe-Mo) alloy.

The ferrite may include nickel-zinc-copper (Ni-Zn-Cu) or manganese-zinc (Mn-Zn).

The cover film may include polyethylene terephthalate (PTE).

According to the present invention, it is possible to provide a magnetic composite sheet having a simple manufacturing process and flexibility and a manufacturing method thereof.

1 is a perspective view schematically showing a magnetic composite sheet according to an embodiment of the present invention.
2 is a cross-sectional view taken along line AA 'of FIG.
3 is an exploded perspective view of an electronic part having a wireless charging and receiving device.
4 is an exploded perspective view of an electronic component and a wireless charging transmission device having a wireless charging and receiving device.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted or schematically shown, and the size of each element does not entirely reflect the actual size.

FIG. 1 is a perspective view schematically showing a magnetic composite sheet 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A 'of FIG.

Hereinafter, the magnetic composite sheet 100 and its manufacturing method will be described with reference to the drawings.

1 and 2, the magnetic composite sheet 100 includes a magnetic substance layer 10 and a cover film 20, and the magnetic substance layer 10 includes a piece of magnetic substance 1 having different sizes and shapes can do.

The magnetic layer 10 may be formed using a slurry containing a magnetic powder, a solvent, and a binder. The magnetic powder may comprise at least one of a metal powder, a metal flake and a ferrite.

The metal powder and metal flake may include, but are not limited to, Fe, Fe-Si alloys, Fe-Si-Al alloys, iron-silicon-chromium (Fe-Si-Cr) alloy and a nickel-iron-molybdenum (Ni-Fe-Mo) alloy.

The ferrite may include at least one of nickel-zinc-copper (Ni-Zn-Cu) and manganese-zinc (Mn-Zn), but is not limited thereto.

For example, the ferrite may be a (NiCuZn) Fe 2 O.

A solvent and a binder are added to the magnetic powder to prepare a slurry. The slurry may further comprise a dispersing agent to uniformly disperse the components contained in the slurry.

The slurry may be prepared using a ball mill. First, the magnetic powder, the solvent and the dispersing agent are mixed, and the components are dispersed evenly using a ball mill for about 10 hours. Thereafter, a binder is further added and further mixed for about 4 hours. The reason for dividing the mixing and dispersing process into two stages is that when the binder is added from the beginning, the magnetic powder is hardly evenly dispersed in the slurry due to the viscosity of the binder.

The solvent may include, but is not limited to, at least one of toluene, alcohol, or methyl ethyl ketone (MEK).

The binder may be at least one selected from the group consisting of water glass, polyimide, polyamide, silicone, phenol resin, and acryl, but is not limited thereto.

The slurry may be added with a ceramic powder when it is required to have an insulating property, and the ceramic powder may include kaolin, talc, and the like.

Next, the slurry is formed into a thin sheet shape and heated to produce a green sheet.

The slurry may be formed into a sheet shape by a tape casting process, a doctor blade method, or the like, but is not limited thereto.

The green sheet means a sheet in which the sintering is not performed and the solvent is removed under a heat treatment at a relatively low temperature of about 50 캜 to 100 캜.

The green sheet is laminated under pressure to obtain a green sheet laminate having a desired thickness. If a very thin thickness is desired, the green sheet laminate may be composed of one green sheet.

Next, the green sheet laminate is preliminarily fired and sintered to prepare a magnetic sintered body. The cover film 20 may be attached to both sides or one side of the magnetic sintered body.

The cover film 20 may include an organic resin having flexibility. Examples of the cover film 20 include polyethylene terephthalate (PTE).

Next, the magnetic sintered body to which the cover film 20 is attached is strongly pressed by means of a device such as a roller, so that the magnetic sintered body is broken into the piece of magnetic body 1. This can be understood as a process in which the magnetic sintered body is broken by physical pressure. Unlike the case where the magnetic sintered body is broken by breaking or grooving by using a blade, the magnetic sintered body is broken in an irregular shape.

In other words, the formed piece of the magnetic body 1 may have irregular size and shape without having a constant shape.

According to the manufacturing method provided by the present invention, the half-cutting step can be omitted in order to impart flexibility to the magnetic composite sheet. That is, in the process of adhering the cover film 20, the sintered laminate can be ruptured and the cover film can be adhered simultaneously by applying a pressure capable of breaking the sintered laminate, thereby simplifying the manufacturing process.

The sintered laminate may be broken by applying a pressure of 10 MPa or more although it depends on the physical properties of the sintered laminate.

A magnetic layer 10 comprising a plurality of pieces 1 of the magnetic substance 1 having different sizes and shapes according to the above-mentioned steps; And a cover film (20) formed on one side or both sides of the magnetic layer.

The magnetic piece 1 may include at least one of a metal powder, a metal flake and a ferrite, and the metal powder and the metal flake may include at least one of iron (Fe), iron-silicon (Fe-Si) (Fe-Si-Al) alloy, iron-silicon-chromium (Fe-Si-Cr) alloy and nickel-iron-molybdenum . ≪ / RTI >

The ferrite may include at least one of nickel-zinc-copper (Ni-Zn-Cu) and manganese-zinc (Mn-Zn), but is not limited thereto. For example, the ferrite may be a (NiCuZn) Fe 2 O.

The cover film 20 may include an organic resin having flexibility. The cover film 20 may be formed of polyethylene terephthalate (PTE).

The magnetic composite sheet 100 of the present invention is a magnetic composite sheet 100 in which a plurality of independent pieces of magnetic material 1 independent of each other are separated by the flexible cover film 20 and bonded to the cover film 20 in a plane, Is made up of a plurality of small pieces (1) and can have flexibility.

Further, it is also possible to provide a flexible cover film on one surface of the magnetic substance layer and a flexible protective film on the other surface.

The magnetic composite sheet 100 according to the embodiment of the present invention exhibits the same effect as that of the magnetic composite sheet composed of small pieces of the magnetic substance having a regular shape despite the irregular size and shape of the magnetic substance piece 1, There is a simple advantage.

An electronic component including a wireless power charging device

3 is an exploded perspective view of an electronic part having a wireless power receiving apparatus.

4 is an exploded perspective view of an electronic component and a wireless power transmission apparatus having a wireless power receiving apparatus.

3 and 4, the electronic device including the wireless power receiving device includes an electronic device main body 600, a power storage 500, a receiver magnetic complex sheet 410, and a receiving antenna 420 can do.

An electronic component including the wireless power receiving apparatus can be wirelessly charged by a wireless power transmitting apparatus as shown in FIG.

The antenna unit 320 of the wireless power transmission apparatus induces a magnetic field change in accordance with the alternating voltage applied from the power supply unit 340 and blocks leakage of the magnetic field by the magnetic composite sheet 310 disposed under the transmission unit At the same time, the magnetic field flow to the receiver can be amplified.

The wireless power receiving apparatus receives the magnetic field change caused by the wireless power transmission apparatus by the receiving antenna unit 420 and outputs power. The output power is stored in the power source storage unit 500, and the power source storage unit 500 may include a secondary battery.

The antenna unit is an apparatus for transmitting or receiving electromagnetic force, but it may be formed of a coil.

The antenna unit may be formed in the form of a wiring pattern, and one coil may be connected or a plurality of coil strands may be connected in parallel to form one coil pattern.

When the antenna portion is formed as a coil pattern, a magnetic path may be formed in the coil pattern.

The antenna unit may be formed in the form of a coil or a flexible film, but is not limited thereto.

The antenna unit may transmit input power by using an induction magnetic field, or may receive an induction magnetic field to output power, thereby enabling a non-contact power transmission / reception.

The description of the shapes of the magnetic composite sheets 310 and 410 included in the wireless power transmission / reception device will be omitted here to avoid redundancy.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

1: magnetic substance piece 10: magnetic substance layer
20: cover film 100: magnetic composite sheet
310: transmitting magnetic composite sheet 320: transmitting antenna part
330: Support layer 340: Power supply
410: Receiving part magnetic composite sheet 420: Receiving antenna part
430: support layer 500: power storage unit
600:

Claims (10)

Providing a magnetic powder;
Preparing a slurry comprising the magnetic powder, a solvent, a binder and a dispersing agent;
Providing a green sheet using the slurry;
Stacking a plurality of the green sheets and then sintering to form a sintered laminate;
Attaching a cover film to one side or both sides of the sintered laminate; And
Applying physical pressure in a direction of stacking the sintered laminate to break the sintered laminate into pieces of a plurality of magnetic bodies having different sizes and shapes; Wherein the magnetic composite sheet comprises a magnetic composite sheet.
3. The method of claim 2,
Wherein the magnetic body piece includes at least one of a metal powder, a metal flake, and a ferrite.
The method of claim 3,
The metal powder and metal flake may be selected from the group consisting of Fe, Si-Fe-Si alloys, Fe-Si-Al alloys, Fe-Si- ) Alloy and a nickel-iron-molybdenum (Ni-Fe-Mo) alloy.
3. The method of claim 2,
Wherein the ferrite comprises nickel-zinc-copper (Ni-Zn-Cu) or manganese-zinc (Mn-Zn).
The method according to claim 1,
Wherein the cover film comprises polyethylene terephthalate (PTE).
A magnetic layer including a plurality of pieces of a magnetic substance having different sizes and shapes; And
And a cover film formed on one surface or both surfaces of the magnetic material layer.
Magnetic composite sheet.
The method according to claim 6,
Wherein the magnetic body piece includes at least one of a metal powder, a metal flake, and a ferrite.
8. The method of claim 7,
The metal powder and metal flake may be selected from the group consisting of Fe, Si-Fe-Si alloys, Fe-Si-Al alloys, Fe-Si- ) Alloy and a nickel-iron-molybdenum (Ni-Fe-Mo) alloy.
8. The method of claim 7,
Wherein the ferrite includes nickel-zinc-copper (Ni-Zn-Cu) or manganese-zinc (Mn-Zn).
The method according to claim 6,
Wherein the cover film comprises polyethylene terephthalate (PTE).
KR1020120151448A 2012-12-21 2012-12-21 Magnetic composite sheet and manufacturing method of the same KR20140081558A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105679483A (en) * 2016-01-28 2016-06-15 同济大学 High-temperature sintering method for iron-aluminum magnetic powder core
KR101699952B1 (en) * 2015-07-16 2017-01-25 (주)휴켐 Electromagnetic wave shielding and absorber composite film, and method of fabricating of the same
KR102044407B1 (en) * 2018-06-26 2019-11-14 주식회사 아모텍 A method for manufacturing ferrite sheet

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101699952B1 (en) * 2015-07-16 2017-01-25 (주)휴켐 Electromagnetic wave shielding and absorber composite film, and method of fabricating of the same
CN105679483A (en) * 2016-01-28 2016-06-15 同济大学 High-temperature sintering method for iron-aluminum magnetic powder core
CN105679483B (en) * 2016-01-28 2017-12-15 同济大学 A kind of iron aluminium powder core high temperature sintering methods
KR102044407B1 (en) * 2018-06-26 2019-11-14 주식회사 아모텍 A method for manufacturing ferrite sheet
WO2020004890A1 (en) * 2018-06-26 2020-01-02 주식회사 아모텍 Method for manufacturing ferrite sheet, ferrite sheet manufactured thereby, and wireless power transmission module including same
CN112262448A (en) * 2018-06-26 2021-01-22 阿莫技术有限公司 Method of manufacturing ferrite sheet, ferrite sheet manufactured thereby, and wireless power transmission module including the same
CN112262448B (en) * 2018-06-26 2023-01-20 阿莫技术有限公司 Method of manufacturing ferrite sheet, ferrite sheet manufactured thereby, and wireless power transmission module including the same
US11615917B2 (en) 2018-06-26 2023-03-28 Amotech Co., Ltd. Method of manufacturing a ferrite sheet

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