KR102369203B1 - 복합 자성체 및 제조 방법 - Google Patents
복합 자성체 및 제조 방법 Download PDFInfo
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- 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
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
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- 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
- H01F1/20—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 particles, e.g. powder
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- H01F1/24—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 particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—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 particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
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Abstract
상기의 과제를 해결하기 위한 본 발명은, 편평한 형상의 연자성(軟磁性) 금속 분말과, 연자성 금속 분말의 평균 두께보다 작으며, 연자성 금속 분말의 표면에 배치되는 절연 입자와, 연자성 금속 분말 및 절연 입자를 분산 유지(保持)시키는 유기 결합재를 포함하는 복합 자성체로서, 연자성 금속 분말의 두께 방향의 단면(斷面)에 있어서의 연자성 금속 분말 표면의 길이 0.2㎛당 절연 입자를 1개 이상 배치한다.
Description
도 2는, 본 발명에 의한 복합 자성체에 있어서의, 절연 입자로 덮인 연자성 금속 분말의 SEM 관찰 사진이다. (a)는 D50=70㎚인 지르코니아 입자에 의해 피복된 연자성 금속 분말을 나타낸 것이고, (b)는 (a)의 표면을 확대한 사진이다. (c)는 D50=12㎚인 지르코니아 입자에 의해 피복된 연자성 금속 분말을 나타낸 것이고, (d)는 (c)의 표면을 확대한 사진이다.
도 3은, 복합 자성체의 유전율의 주파수 특성을 나타낸 도면으로서, (a)는 실시예 1에 의한 유전율의 주파수 특성을 나타낸 도면이고, (b)는 비교예 1에 의한 복합 자성체의 유전율의 주파수 특성을 나타낸 도면이다.
도 4는, 본 발명에 의한 복합 자성체의 Rda의 주파수 특성을 나타낸 도면이다.
도 5는, 실시예 1과 비교예 1의 복합 자성체의 적용예를 나타낸 모식도로서, (a)는 통신 기기(100)의 내부 구조의 단면을 나타낸 모식도이고, (b)는 통신 기기(100)를 모델화한 평가 시스템(200)을 나타낸 모식도이다.
도 6은, 실시예 1과 비교예 1의 감결합의 주파수 특성을 나타낸 그래프이다.
2 : 절연 입자
3 : 유기 결합제
10, 12 : ε′
11, 13 : ε″
21 : 전자 부품
22 : 안테나
23 : 금속 하우징
24 : 금속판
25 : 자성 시트
31 : 제1 주파수 특성
32 : 제2 주파수 특성
100 : 통신 기기
110 : 반사 영역
200 : 평가 시스템
Claims (6)
- 편평한 형상의 연자성(軟磁性) 금속 분말과, 상기 연자성 금속 분말의 평균 두께보다 작고, 상기 연자성 금속 분말의 표면에, 수성 용매를 건조시켜 배치한 절연 입자와, 상기 연자성 금속 분말 및 상기 절연 입자를 분산 유지(保持)시키는 유기 결합재를 포함하는 복합 자성체로서,
상기 연자성 금속 분말의 두께 방향의 단면(斷面)에 있어서의 상기 연자성 금속 분말의 표면의 길이 0.2㎛당 상기 절연 입자를 1개 이상 배치하고,
상기 연자성 금속 분말의 비표면적을 Sp, 상기 절연 입자의 비표면적을 Sz, 상기 절연 입자의 적층 수를 n으로 하면, (Sz/2)/Sp=n(n은 1)을 만족하는 것을 특징으로 하는 복합 자성체. - 제1항에 있어서,
상기 연자성 금속 분말의 체적 입도(粒度) 분포의 적산(積算) 10% 입자 직경(D10)이 2㎛ 이상 6㎛ 이하, 그리고 적산 90% 입자 직경(D90)이 8㎛ 이상 27㎛ 이하인, 복합 자성체. - 제1항 또는 제2항에 있어서,
상기 절연 입자가, 알루미나, 실리카, 마그네시아, 티타니아, 지르코니아 중 적어도 1종을 포함하는, 복합 자성체. - 제1항 또는 제2항에 있어서,
상기 절연 입자의 체적 저항율이 1×1013Ω·㎝ 이상인, 복합 자성체. - 제1항 또는 제2항에 있어서,
상기 절연 입자의 체적 입도 분포의 메디안 직경(D50)이 10㎚ 이상 70㎚ 이하인, 복합 자성체. - 편평한 형상의 연자성 금속 분말을, 상기 연자성 금속 분말의 평균 두께보다 작은 절연 입자를 수성 용매에 분산시킨 pH>7.0인 졸에 침지한 후, 상기 수성 용매를 건조시켜 상기 연자성 금속 분말의 표면에 상기 절연 입자를 피복하고, 상기 연자성 금속 분말을 유기 결합재와 혼합반죽(混練)하고, 분산시켜, 상기 연자성 금속 분말의 두께 방향의 단면에 있어서의 상기 연자성 금속 분말의 표면의 길이 0.2㎛당 상기 절연 입자를 1개 이상 배치한 시트 형상으로 성형하는 것을 포함하며,
상기 연자성 금속 분말의 비표면적을 Sp, 상기 절연 입자의 비표면적을 Sz, 상기 절연 입자의 적층 수를 n으로 하면, (Sz/2)/Sp=n(n은 1)을 만족하도록, 상기 연자성 금속 분말과 상기 절연 입자의 배합비를 조정하는 것을 특징으로 하는 복합 자성체의 제조 방법.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP-P-2016-023273 | 2016-02-10 | ||
| JP2016023273 | 2016-02-10 | ||
| PCT/JP2016/063345 WO2017138158A1 (ja) | 2016-02-10 | 2016-04-28 | 複合磁性体および製造方法 |
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| Publication Number | Publication Date |
|---|---|
| KR20180111851A KR20180111851A (ko) | 2018-10-11 |
| KR102369203B1 true KR102369203B1 (ko) | 2022-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020187023622A Active KR102369203B1 (ko) | 2016-02-10 | 2016-04-28 | 복합 자성체 및 제조 방법 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11756714B2 (ko) |
| JP (1) | JP6873057B2 (ko) |
| KR (1) | KR102369203B1 (ko) |
| CN (1) | CN108604487A (ko) |
| TW (1) | TWI642070B (ko) |
| WO (1) | WO2017138158A1 (ko) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7283031B2 (ja) * | 2017-03-09 | 2023-05-30 | Tdk株式会社 | 圧粉磁心 |
| CN114369762B (zh) * | 2022-01-07 | 2022-10-18 | 鞍钢股份有限公司 | 一种复合磁性金属粉末材料及其制备方法与用途 |
| JP2023160276A (ja) * | 2022-04-22 | 2023-11-02 | 博 小林 | 金属、合金、金属酸化物、ないしは、無機化合物のいずれかの材質からなる扁平粉の扁平面同士の間隙を、金属ないしは金属酸化物のナノ粒子の集まりで接合し、該扁平粉の集まりからなるシートを製造する方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3568554A (en) * | 1967-11-13 | 1971-03-09 | Core Memories Ltd | Magnetic core forming system |
| JP4065578B2 (ja) | 1996-09-12 | 2008-03-26 | Necトーキン株式会社 | 電磁干渉抑制体 |
| JPH10335128A (ja) | 1997-03-31 | 1998-12-18 | Tdk Corp | 圧粉コア用強磁性粉末、圧粉コアおよびその製造方法 |
| US6102980A (en) * | 1997-03-31 | 2000-08-15 | Tdk Corporation | Dust core, ferromagnetic powder composition therefor, and method of making |
| KR100335128B1 (ko) | 1999-11-22 | 2002-05-04 | 박종섭 | 반도체소자 제조를 위한 이온주입장치 |
| JP4684461B2 (ja) | 2000-04-28 | 2011-05-18 | パナソニック株式会社 | 磁性素子の製造方法 |
| JP3865601B2 (ja) * | 2001-06-12 | 2007-01-10 | 日東電工株式会社 | 電磁波抑制体シート |
| JP4655540B2 (ja) * | 2004-08-06 | 2011-03-23 | 株式会社豊田中央研究所 | 表面層被覆金属及び圧粉体 |
| JP5145923B2 (ja) * | 2007-12-26 | 2013-02-20 | パナソニック株式会社 | 複合磁性材料 |
| JP2010080508A (ja) | 2008-09-24 | 2010-04-08 | Daihatsu Motor Co Ltd | 複合軟磁性材料および複合軟磁性材料の製造方法 |
| JP5032711B1 (ja) | 2011-07-05 | 2012-09-26 | 太陽誘電株式会社 | 磁性材料およびそれを用いたコイル部品 |
| JP5082002B1 (ja) | 2011-08-26 | 2012-11-28 | 太陽誘電株式会社 | 磁性材料およびコイル部品 |
| JP5822146B2 (ja) | 2013-03-29 | 2015-11-24 | パウダーテック株式会社 | ノイズ抑制用複合磁性粉 |
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- 2016-04-28 JP JP2017566495A patent/JP6873057B2/ja active Active
- 2016-04-28 WO PCT/JP2016/063345 patent/WO2017138158A1/ja not_active Ceased
- 2016-04-28 KR KR1020187023622A patent/KR102369203B1/ko active Active
- 2016-04-28 US US16/074,424 patent/US11756714B2/en active Active
- 2016-04-28 CN CN201680081129.7A patent/CN108604487A/zh active Pending
- 2016-06-16 TW TW105118867A patent/TWI642070B/zh active
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| Publication number | Publication date |
|---|---|
| US11756714B2 (en) | 2023-09-12 |
| CN108604487A (zh) | 2018-09-28 |
| US20190035525A1 (en) | 2019-01-31 |
| JP6873057B2 (ja) | 2021-05-19 |
| JPWO2017138158A1 (ja) | 2018-12-27 |
| KR20180111851A (ko) | 2018-10-11 |
| TW201729223A (zh) | 2017-08-16 |
| WO2017138158A1 (ja) | 2017-08-17 |
| TWI642070B (zh) | 2018-11-21 |
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