KR850004444A - 조절개시에 의한 이산화크롬의 제조방법 - Google Patents

조절개시에 의한 이산화크롬의 제조방법 Download PDF

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Publication number
KR850004444A
KR850004444A KR1019840008002A KR840008002A KR850004444A KR 850004444 A KR850004444 A KR 850004444A KR 1019840008002 A KR1019840008002 A KR 1019840008002A KR 840008002 A KR840008002 A KR 840008002A KR 850004444 A KR850004444 A KR 850004444A
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KR
South Korea
Prior art keywords
cro
tellurium
added
solution
chromium dioxide
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KR1019840008002A
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English (en)
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KR870001734B1 (ko
Inventor
홍-이찬
Original Assignee
도늘드 에이 호우즈
이 아이 듀우판 디 네모아 앤드 캄파니
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Publication of KR850004444A publication Critical patent/KR850004444A/ko
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Publication of KR870001734B1 publication Critical patent/KR870001734B1/ko

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/02—Oxides or hydrates thereof
    • C01G37/027—Chromium dioxide
    • 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
    • G11B5/70636—CrO2
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/02—Amorphous compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C01P2004/52—Particles with a specific particle size distribution highly monodisperse size distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Compounds Of Iron (AREA)

Abstract

내용 없음

Description

조절개시에 의한 이산화크롬의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음

Claims (7)

  1. 조절제 안티몬, 철 혹은 텔루르 존재하, 200-600℃ C, 100-700바의 기압하에서, 3가 및 6가의 크롬산화물을 함유하는 반응혼합물을 열수반응(hydrothermal reaction)시키는, 조절제 사용한 강자성 이산화크롬의 제조공정에 있어서, 가압, 가온하기 이전에 상기 조절제를 수용액으로 반응혼합물에 첨가하고, 상기 용액은 상기 조절제를 CrO3수용액에 첨가한 후 용해를 촉진하기 위해 가열하여 제조함을 특징으로 하는 제조공정.
  2. 제1항에 있어서, 상기 조절제가 침상결정성장을 증가시키는 공정.
  3. 제1항에 있어서, 상기 조절제가 보자력(Coercivity)을 증가시키는 공정.
  4. 제1항에 있어서, 90-120℃ C에서 45-180분간 CrO3수용액에 Sb2O3를 용해시키는 공정.
  5. 제1항에 있어서, 생성된 강자성 이산화크롬의 중량을 기준하여, 0.1-0.5중량%의 안티몬 혹은 텔루르를 첨가한 공정.
  6. 제1항에 있어서, 상기 CrO3수용액에 텔루크를 산화텔루크의 형태로 첨가하는 공정.
  7. 제1항에 있어서, 상기 CrO3수용액에 철을 산화철의 형태로 첨가하는 공정.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019840008002A 1983-12-16 1984-12-15 이산화크롬의 제조방법 KR870001734B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US564012 1983-12-16
US06/564,012 US4524008A (en) 1983-12-16 1983-12-16 Controlled initiation chromium dioxide synthesis

Publications (2)

Publication Number Publication Date
KR850004444A true KR850004444A (ko) 1985-07-15
KR870001734B1 KR870001734B1 (ko) 1987-09-26

Family

ID=24252808

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840008002A KR870001734B1 (ko) 1983-12-16 1984-12-15 이산화크롬의 제조방법

Country Status (5)

Country Link
US (1) US4524008A (ko)
EP (1) EP0146127B1 (ko)
JP (1) JPS60145915A (ko)
KR (1) KR870001734B1 (ko)
DE (1) DE3480701D1 (ko)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513723A1 (de) * 1985-04-17 1986-10-23 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von ferromagnetischem chromdioxid
US4747974A (en) * 1986-03-28 1988-05-31 E. I. Dupont De Nemours And Company Mixed Cr2 O3 paste for CrO2 synthesis
DE3837646A1 (de) * 1988-11-05 1990-05-10 Basf Ag Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material
DE4339841A1 (de) * 1993-11-23 1995-05-24 Basf Magnetics Gmbh Feinteiliges nadfelförmiges magnetisches modifiziertes Chromdioxid
US5698744A (en) * 1995-03-31 1997-12-16 E. I. Du Pont De Nemours And Company Process for the selective oxidation of compounds
ES2763703T3 (es) 2008-04-15 2020-05-29 Sarcode Bioscience Inc Antagonistas de LFA-1 tópicos utilizados en el tratamiento localizado de trastornos inmunes

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278263A (en) * 1964-11-27 1966-10-11 Du Pont Ferromagnetic chromium dioxide and preparation thereof
NL7005311A (ko) * 1969-04-18 1970-10-20
US3600315A (en) * 1969-12-22 1971-08-17 Ibm Methods of manufacturing magnetic compositions of carbon modified chromium oxide
DE2124812A1 (de) * 1971-05-19 1972-11-30 Bayer Ag Verfahren zur Herstellung von ferromagnetischem Chromdioxid
US3778373A (en) * 1971-11-08 1973-12-11 Bell & Howell Co Iron containing ferromagnetic chromium oxide
IT1045191B (it) * 1975-10-31 1980-05-10 Montedison Spa Procedimento per la produzione di biossido di cromo ferromagnetico
DE2942646A1 (de) * 1979-10-22 1981-04-30 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von ferromagnetischem chromdioxid
JPS5722893A (en) * 1980-07-14 1982-02-05 Fujitsu Ltd Method for laser welding and its apparatus

Also Published As

Publication number Publication date
EP0146127B1 (en) 1989-12-13
US4524008A (en) 1985-06-18
EP0146127A2 (en) 1985-06-26
JPS6242852B2 (ko) 1987-09-10
DE3480701D1 (de) 1990-01-18
KR870001734B1 (ko) 1987-09-26
JPS60145915A (ja) 1985-08-01
EP0146127A3 (en) 1987-06-16

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