GB1241773A - Stabilized ferromagnetic chromium dioxide - Google Patents

Stabilized ferromagnetic chromium dioxide

Info

Publication number
GB1241773A
GB1241773A GB2681869A GB2681869A GB1241773A GB 1241773 A GB1241773 A GB 1241773A GB 2681869 A GB2681869 A GB 2681869A GB 2681869 A GB2681869 A GB 2681869A GB 1241773 A GB1241773 A GB 1241773A
Authority
GB
United Kingdom
Prior art keywords
cro
particles
chromium dioxide
reacting
acicular
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2681869A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1241773A publication Critical patent/GB1241773A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
GB2681869A 1968-05-27 1969-05-27 Stabilized ferromagnetic chromium dioxide Expired GB1241773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73210968A 1968-05-27 1968-05-27

Publications (1)

Publication Number Publication Date
GB1241773A true GB1241773A (en) 1971-08-04

Family

ID=24942226

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2681869A Expired GB1241773A (en) 1968-05-27 1969-05-27 Stabilized ferromagnetic chromium dioxide

Country Status (6)

Country Link
JP (2) JPS4819074B1 (nl)
BE (1) BE733550A (nl)
FR (1) FR2009424A1 (nl)
GB (1) GB1241773A (nl)
MY (1) MY7300325A (nl)
NL (1) NL164695C (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5096779A (en) * 1988-08-23 1992-03-17 Basf Aktiengesellschaft Chromium dioxide material, its preparation and magnetic recording media containing this chromium dioxide material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5096779A (en) * 1988-08-23 1992-03-17 Basf Aktiengesellschaft Chromium dioxide material, its preparation and magnetic recording media containing this chromium dioxide material

Also Published As

Publication number Publication date
DE1925541B2 (de) 1977-07-14
JPS4819074B1 (nl) 1973-06-11
NL164695B (nl) 1980-08-15
MY7300325A (en) 1973-12-31
NL6907918A (nl) 1969-12-01
NL164695C (nl) 1981-01-15
JPS5229840B1 (nl) 1977-08-04
DE1925541A1 (de) 1970-03-12
FR2009424A1 (nl) 1970-02-06
BE733550A (nl) 1969-11-24

Similar Documents

Publication Publication Date Title
GB1264994A (nl)
ES279272A1 (es) Mejoras introducidas en los portadoras de registro con un medio registrador magnético
GB1095135A (en) A magnetic recording process
NL7213622A (en) Medium for memory equipment - is bismuth-modified iron garnet, for low curie temp /large kerr effect
GB1347615A (en) Cobalt doped magnetic iron oxide particles
ES408374A1 (es) Perfeccionamientos introducidos en una cabeza de registro con un elemento magnetorresistivo para leer o escribbir so- bre un medio immantable.
GB1356005A (en) Magnetic recording head
GB1241773A (en) Stabilized ferromagnetic chromium dioxide
GB2108989B (en) Magnetic recording medium; acicular cobalt doped iron oxide for use therein
KR910005237A (ko) 자기 기록매체
JPS5320310A (en) Magnetic recording and reproducing system
JPS55123749A (en) Double recording system of magnetic disc
US3654163A (en) Cobalt ferrite magnetic powder for tape recording
KR900015028A (ko) 자기카아드의 기록방법과 판독방법 리어더라이터
JPS52106500A (en) Magnetic recording medium
GB1213169A (en) Improvements in or relating to methods of magnetic recording
GB1212502A (en) Improvements relating to cards capable of breaking an authenticity code
JPS5658130A (en) Magnetic card having increased resistance to external magnetic field
GB1373390A (en) Manganese-zinc ferrites for magnetic heads
JPS5339705A (en) Magnetic recording medium
JPS53106110A (en) Magnetic memory controller
JPS55113316A (en) Manufacture of magnetic recording medium
GB1436140A (en) Magnetic materials
JPS5361306A (en) Magnetic recording medium
JPS5564613A (en) Data file chaining unit