KR880004049A - 산화철 자기안료 및 이의 제조방법 - Google Patents

산화철 자기안료 및 이의 제조방법 Download PDF

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Publication number
KR880004049A
KR880004049A KR870010102A KR870010102A KR880004049A KR 880004049 A KR880004049 A KR 880004049A KR 870010102 A KR870010102 A KR 870010102A KR 870010102 A KR870010102 A KR 870010102A KR 880004049 A KR880004049 A KR 880004049A
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KR
South Korea
Prior art keywords
coating
iron oxide
iii
iron
cobalt
Prior art date
Application number
KR870010102A
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English (en)
Other versions
KR960012242B1 (ko
Inventor
카드레인 핸드릭
킴레 페터
로디 프리쯔
아일링 알로이스
Original Assignee
클라우스 데너, 귄터 슈마허
바이엘 아크티엔게젤샤프트
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 클라우스 데너, 귄터 슈마허, 바이엘 아크티엔게젤샤프트 filed Critical 클라우스 데너, 귄터 슈마허
Publication of KR880004049A publication Critical patent/KR880004049A/ko
Application granted granted Critical
Publication of KR960012242B1 publication Critical patent/KR960012242B1/ko

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Classifications

    • 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
    • H01F1/032—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 hard-magnetic materials
    • H01F1/10—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • 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
    • G11B5/70642—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 iron oxides
    • G11B5/70647—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 iron oxides with a skin
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated

Landscapes

  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

내용 없음

Description

산화철 자기안료 및 이의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 산화철 안료에 대한 자기이력 곡선(hysteresis curve)을 도시한 것이다.

Claims (6)

  1. 76K 내지 298K의 온도범위에서 보자력의 온도 의존도가 0.13kA/mk 미만이고 0.9g/㎠으로 압착된 분말의 보자력이 51kA/m이상인, 코발트 화합물로 피복된 산화철 자기안료.
  2. 제1항에 있어서, 피복된 산화철 자기안료를 기준으로 하여, 코발트 함량이 2.5내지 6중량%인 산화철 자기안료.
  3. 제1항에 있어서, (ⅰ)FeOx (여기에서, x는 1.33 내지 1.5의 수이다)의 코어. (ⅱ)0.01 내지 2 미만의 Fe(Ⅱ)에 대한 Fe(Ⅲ)의 비율로 2가철 및 3가철을 함유하는 화합물로 이루어진 코어상의 제1피복물 및 (ⅲ) 제1피복물상의 코발트 화합물의 피복물로 이루어지는 산화철 자기안료.
  4. FeOx(여기에서, x는 1.33 내지 1.5의 수이다)의 조성을 갖는 산화철 자기코어 물질을 제1단계에서, 0.01 내지 2 미만의 Fe(Ⅱ)에 대한 Fe(Ⅲ)의 비율로 2가철 및 3가철을 함유하는 화합물로 피복시키고, 이어서 제2단계에서 예비 피복된 코어를 코발트 화합물의 제2피복물로 피복시킴을 특징으로 하여, 제1항의 코발트로 피복된 산화철 자기안료를 제조하는 방법.
  5. 제4항에 있어서, Fe(Ⅲ):Fe(Ⅱ)비를 Fe(Ⅲ)철염 및 Fe(Ⅱ)철염의 함께 혼합된 양에 의해 조정하는 방법.
  6. 제4항에 있어서, Fe(Ⅲ):Fe(Ⅱ)비를 제2코발트 피복 단계 이전에 Fe(Ⅱ)의 조절 산화에 의해 조정하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870010102A 1986-09-13 1987-09-11 산화철 자기 안료 및 이의 제조 방법 KR960012242B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3631194.4 1986-09-13
DE19863631194 DE3631194A1 (de) 1986-09-13 1986-09-13 Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung

Publications (2)

Publication Number Publication Date
KR880004049A true KR880004049A (ko) 1988-06-01
KR960012242B1 KR960012242B1 (ko) 1996-09-18

Family

ID=6309517

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870010102A KR960012242B1 (ko) 1986-09-13 1987-09-11 산화철 자기 안료 및 이의 제조 방법

Country Status (5)

Country Link
US (1) US4933014A (ko)
EP (1) EP0260520B1 (ko)
JP (1) JPH0679968B2 (ko)
KR (1) KR960012242B1 (ko)
DE (2) DE3631194A1 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung
US5045390A (en) * 1988-04-22 1991-09-03 Konica Corporation Magnetic recording medium
EP0376033B1 (de) * 1988-12-24 1993-01-20 Bayer Ag Verfahren zur Herstellung von magnetischen Eisenoxiden und so erhaltene Pigmente
DE3908427A1 (de) * 1989-03-15 1990-09-20 Bayer Ag Co-haltige magnetische pigmente, verfahren zu ihrer herstellung sowie deren verwendung
DE4319572A1 (de) * 1993-06-14 1994-12-15 Toda Kogyo Corp Co-haltige Eisenoxidpigmente, Verfahren zu ihrer Herstellung und diese enthaltende magnetische Medien

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL209353A (ko) * 1955-07-29
CA988704A (en) * 1971-07-19 1976-05-11 Akira Okazoe Ferro-magnetic acicular particles for recording medium
US3931025A (en) * 1973-09-21 1976-01-06 Bayer Aktiengesellschaft Magnetic iron oxides with improved orientability and a process for their production
JPS5719049B2 (ko) * 1974-06-13 1982-04-20
JPS5850005B2 (ja) * 1974-08-20 1983-11-08 日立マクセル株式会社 ジキキロクヨウジセイフンマツノ セイゾウホウ
JPS6044254B2 (ja) * 1977-03-16 1985-10-02 富士写真フイルム株式会社 強磁性粉末の製造方法
JPS5413997A (en) * 1977-07-04 1979-02-01 Sony Corp Magnetic recording medium and its manufacture
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
JPS5659630A (en) * 1979-10-15 1981-05-23 Tdk Corp Manufacture of high coercive force magnetic powder
FR2481256A1 (fr) * 1980-04-28 1981-10-30 Rhone Poulenc Ind Particules magnetiques de coercivite elevee a base d'oxydes de fer ferrimagnetique dopees au cobalt, leurs procedes de preparation et leurs applications
AU548794B2 (en) * 1981-07-28 1986-01-02 Ishihara Sangyo Kaisha Ltd. Process for producing cobalt containing ferromagnetic iron oxides
JPS5879824A (ja) * 1981-10-30 1983-05-13 Hitachi Maxell Ltd コバルト含有酸化鉄磁性粉の製造法
JPS58161927A (ja) * 1982-03-19 1983-09-26 Sony Corp 磁性粉末の製法
DD209353A3 (de) * 1982-04-20 1984-04-25 Dessau Magnetbandfab Verfahren zur herstellung ferrimagnetischer nadelfoermiger cobaltmodifizierter berthollidischer eisenoxide
JPS59107924A (ja) * 1982-12-08 1984-06-22 Ishihara Sangyo Kaisha Ltd コバルト含有磁性酸化鉄粉末の製造方法
JPS59152226A (ja) * 1983-02-16 1984-08-30 Hitachi Maxell Ltd 磁性粉末の処理方法
JPS6187302A (ja) * 1985-10-18 1986-05-02 Sony Corp 磁気記録媒体の製法
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung

Also Published As

Publication number Publication date
DE3777038D1 (de) 1992-04-09
EP0260520B1 (de) 1992-03-04
DE3631194A1 (de) 1988-03-24
JPS6374921A (ja) 1988-04-05
US4933014A (en) 1990-06-12
JPH0679968B2 (ja) 1994-10-12
KR960012242B1 (ko) 1996-09-18
EP0260520A1 (de) 1988-03-23

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