KR910020192A - 탄소를 함유하는 침상금속철미립자, 그의제법, 이를 함유하는 자성도료 조성물 및 자기기록매체 - Google Patents
탄소를 함유하는 침상금속철미립자, 그의제법, 이를 함유하는 자성도료 조성물 및 자기기록매체 Download PDFInfo
- Publication number
- KR910020192A KR910020192A KR1019910007861A KR910007861A KR910020192A KR 910020192 A KR910020192 A KR 910020192A KR 1019910007861 A KR1019910007861 A KR 1019910007861A KR 910007861 A KR910007861 A KR 910007861A KR 910020192 A KR910020192 A KR 910020192A
- Authority
- KR
- South Korea
- Prior art keywords
- fine particles
- iron fine
- needle
- magnetic
- carbon
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
- G11B5/70615—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys containing Fe metal or alloys
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
- Y10T428/257—Iron oxide or aluminum oxide
Landscapes
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 실시예3에서 얻어진 침상탄화철미립자의 X선 회절패턴이다. 제2도는 실시예3에서 얻어진 본발명의 침상금속철미립자의 X선 회절 패턴이다.
Claims (5)
- 탄소를 함유하는 침상금속철미립자이고 그 평균입경(장축)이 1.0㎛이하, 평균축비가 3∼15인 것을 특징으로 하는 침상금속철미립자.
- 침상금속철미립자와 탄소원자를 함유하지 않는 환원제를 가열 조건하에 접촉시킴으로써 얻어지는 것을 특징으로 하는 침상금속철미립자.
- 침상금속철미립자와 탄소원자를 함유하지 않는 환원제를 가열 조건하에 접촉시키는 것을 특징으로 하는 탄소를 함유하는 침상금속철미립자의 제조방법.
- 탄소를 함유하는 침상금속철미립자이고 그 평균입경(장축)이 1.0㎛이하, 평균축비가 3∼15인 침상금속철미립자를 자성재료로서 함유하는 것을 특징으로 하는 자성도료조성물.
- 탄소를 함유하는 침상금속철미립자이고 그 평균입경(장축)이 1.0㎛이하, 평균축비가 3∼15인 침상금속철미립자를 자성재료로서 함유하는 것을 특징으로 하는 자기기록매체.※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12629190 | 1990-05-15 | ||
JP90-126291 | 1990-05-15 | ||
JP2-126291 | 1991-05-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR910020192A true KR910020192A (ko) | 1991-12-19 |
KR950002968B1 KR950002968B1 (ko) | 1995-03-29 |
Family
ID=14931575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910007861A KR950002968B1 (ko) | 1990-05-15 | 1991-05-15 | 탄소를 함유하는 침상금속철미립자, 그의 제법, 이를 함유하는 자성도료 조성물 및 자기기록매체 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5660927A (ko) |
EP (1) | EP0457299B1 (ko) |
KR (1) | KR950002968B1 (ko) |
CA (1) | CA2042650A1 (ko) |
DE (1) | DE69104118T2 (ko) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR960016463B1 (ko) * | 1992-01-22 | 1996-12-12 | 다이킨 고교 가부시키가이샤 | 금속철, 탄화철 및 탄소를 함유하는 침상 미립자, 그 제조법, 그것을 함유하는 자성도료 조성물 및 자기기록매체 |
EP0928775B1 (en) * | 1997-12-26 | 2003-06-18 | Toda Kogyo Corporation | Acicular hematite particles and magnetic recording medium |
JP5425152B2 (ja) * | 2011-09-30 | 2014-02-26 | 富士フイルム株式会社 | 磁気記録媒体 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034291B (de) * | 1954-08-06 | 1958-07-17 | Eisen & Stahlind Ag | Dauermagnet und Verfahren zu seiner Herstellung |
JPS5843815B2 (ja) * | 1975-10-23 | 1983-09-29 | 富士写真フイルム株式会社 | ジキキロクテ−プ |
JPS5817539A (ja) * | 1981-07-21 | 1983-02-01 | Sony Corp | 磁気記録媒体 |
JPS59157204A (ja) * | 1983-02-23 | 1984-09-06 | Chisso Corp | 強磁性金属微粒子の製造方法 |
US4632866A (en) * | 1984-04-05 | 1986-12-30 | Tdk Corporation | Magnetic recording medium |
DE3516884A1 (de) * | 1985-05-10 | 1986-11-13 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung nadelfoermiger, im wesentlichen aus eisen bestehender ferromagnetischer metallteilchen |
US4748080A (en) * | 1985-10-08 | 1988-05-31 | Konishiroku Photo Industry Co., Ltd. | Magnetic recording medium containing iron carbide |
GB2181445B (en) * | 1985-10-09 | 1989-11-08 | Tdk Corp | Magnetic recording medium |
DE68907303T2 (de) * | 1988-09-05 | 1994-02-17 | Mitsubishi Petrochemical Co | Magnetisches Pulvermetall mit Kohlenstoff. |
-
1991
- 1991-05-15 EP EP91107854A patent/EP0457299B1/en not_active Expired - Lifetime
- 1991-05-15 KR KR1019910007861A patent/KR950002968B1/ko not_active IP Right Cessation
- 1991-05-15 DE DE69104118T patent/DE69104118T2/de not_active Expired - Fee Related
- 1991-05-15 CA CA002042650A patent/CA2042650A1/en not_active Abandoned
-
1994
- 1994-07-28 US US08/281,657 patent/US5660927A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0457299A1 (en) | 1991-11-21 |
DE69104118T2 (de) | 1995-05-11 |
DE69104118D1 (de) | 1994-10-27 |
US5660927A (en) | 1997-08-26 |
KR950002968B1 (ko) | 1995-03-29 |
CA2042650A1 (en) | 1991-11-16 |
EP0457299B1 (en) | 1994-09-21 |
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Payment date: 20020320 Year of fee payment: 8 |
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