JPS55149136A - Manufacture of iron oxide hydrate - Google Patents

Manufacture of iron oxide hydrate

Info

Publication number
JPS55149136A
JPS55149136A JP5701979A JP5701979A JPS55149136A JP S55149136 A JPS55149136 A JP S55149136A JP 5701979 A JP5701979 A JP 5701979A JP 5701979 A JP5701979 A JP 5701979A JP S55149136 A JPS55149136 A JP S55149136A
Authority
JP
Japan
Prior art keywords
reaction
contg
oxidation
soln
feooh
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.)
Granted
Application number
JP5701979A
Other languages
Japanese (ja)
Other versions
JPS6242856B2 (en
Inventor
Shinji Umeki
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP5701979A priority Critical patent/JPS55149136A/en
Priority to NL8002522A priority patent/NL8002522A/en
Priority to DE19803017526 priority patent/DE3017526A1/en
Priority to GB8015473A priority patent/GB2051025A/en
Publication of JPS55149136A publication Critical patent/JPS55149136A/en
Publication of JPS6242856B2 publication Critical patent/JPS6242856B2/ja
Granted 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
    • G11B5/70642—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
    • G11B5/70652—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 gamma - Fe2 O3
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • 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
    • C01P2006/80—Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)

Abstract

PURPOSE: To manufacture starting material for magnetic powder, at a low cost, having a small grain size and giving high S/N when used as a magnetic recording medium by maintaining the pH of a reaction soln. within a specified range from the beginning to the end of oxidation reaction of an aqueous soln. contg. Fe2+ of FeSO4 or the like as a principal component after adding alkali.
CONSTITUTION: When an aqueous soln. contg. Fe2+ or the like as a principal component is oxidized after adding alkali, from the beginning to the end of oxidation reaction the pH of the reaction soln. is maintained at 5.5W7.5, and the oxidation is carried out at 25W35°C to obtain α-FeOOH contg. little impurities. This product slightly undergoes a sintering phenomenon in a reduction and oxidation process for converting it into γ-Fe2O3, and it shows superior magnetic characteristics. The α-FeOOH after the reaction can be washed simply, resulting in a reduced production cost.
COPYRIGHT: (C)1980,JPO&Japio
JP5701979A 1979-05-11 1979-05-11 Manufacture of iron oxide hydrate Granted JPS55149136A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5701979A JPS55149136A (en) 1979-05-11 1979-05-11 Manufacture of iron oxide hydrate
NL8002522A NL8002522A (en) 1979-05-11 1980-05-01 PROCESS FOR PREPARING HYDRATED IRON OXIDE.
DE19803017526 DE3017526A1 (en) 1979-05-11 1980-05-07 METHOD FOR PRODUCING HYDRATED IRON OXIDE
GB8015473A GB2051025A (en) 1979-05-11 1980-05-09 Process for producing hydrated iron oxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5701979A JPS55149136A (en) 1979-05-11 1979-05-11 Manufacture of iron oxide hydrate

Publications (2)

Publication Number Publication Date
JPS55149136A true JPS55149136A (en) 1980-11-20
JPS6242856B2 JPS6242856B2 (en) 1987-09-10

Family

ID=13043715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5701979A Granted JPS55149136A (en) 1979-05-11 1979-05-11 Manufacture of iron oxide hydrate

Country Status (4)

Country Link
JP (1) JPS55149136A (en)
DE (1) DE3017526A1 (en)
GB (1) GB2051025A (en)
NL (1) NL8002522A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678430A (en) * 1979-11-29 1981-06-27 Mitsui Toatsu Chem Inc Production of iron compound particle for magnetic recording

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3573039D1 (en) * 1984-04-28 1989-10-19 Toda Kogyo Corp Magnetic iron oxide particles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033198A (en) * 1973-07-26 1975-03-31
JPS5166499A (en) * 1974-12-06 1976-06-09 Masahito Takeda

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033198A (en) * 1973-07-26 1975-03-31
JPS5166499A (en) * 1974-12-06 1976-06-09 Masahito Takeda

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678430A (en) * 1979-11-29 1981-06-27 Mitsui Toatsu Chem Inc Production of iron compound particle for magnetic recording
JPS6353133B2 (en) * 1979-11-29 1988-10-21 Mitsui Toatsu Chemicals

Also Published As

Publication number Publication date
JPS6242856B2 (en) 1987-09-10
GB2051025A (en) 1981-01-14
DE3017526A1 (en) 1980-11-13
NL8002522A (en) 1980-11-13

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