JPS5673631A - Manufacture of needlelike goethite - Google Patents

Manufacture of needlelike goethite

Info

Publication number
JPS5673631A
JPS5673631A JP14714379A JP14714379A JPS5673631A JP S5673631 A JPS5673631 A JP S5673631A JP 14714379 A JP14714379 A JP 14714379A JP 14714379 A JP14714379 A JP 14714379A JP S5673631 A JPS5673631 A JP S5673631A
Authority
JP
Japan
Prior art keywords
ferrous
goethite
manufacture
salt
soln
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.)
Pending
Application number
JP14714379A
Other languages
Japanese (ja)
Inventor
Toshihiro Hamahata
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 JP14714379A priority Critical patent/JPS5673631A/en
Priority to DE19803043079 priority patent/DE3043079C2/en
Publication of JPS5673631A publication Critical patent/JPS5673631A/en
Pending 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
    • C01P2004/60—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
    • C01P2006/42—Magnetic properties

Abstract

PURPOSE: To obtain fine needlelike goethite having a large axial ratio by adding zinc salt and alkali to a ferrous salt soln., adjusting the ratio of anions to ferrous ions to ≤1, and carrying out oxidation with sodium chlorate or potassium chlorate.
CONSTITUTION: Zinc salt and alkali are added to a ferrous salt soln. such as a ferrous sulfate soln. to precipitate ferrous hydroxide at ≥11pH, and the ratio of anions to ferrous ions is adjusted to ≤1. Sodium chlorate or potassium chlorate is then added to manufacture meedlelike goethite by oxidation at ≤80°C. Zinc sulfate is preferably used as the zinc salt.
COPYRIGHT: (C)1981,JPO&Japio
JP14714379A 1979-11-15 1979-11-15 Manufacture of needlelike goethite Pending JPS5673631A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14714379A JPS5673631A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite
DE19803043079 DE3043079C2 (en) 1979-11-15 1980-11-14 Process for making needle-shaped goethite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14714379A JPS5673631A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite

Publications (1)

Publication Number Publication Date
JPS5673631A true JPS5673631A (en) 1981-06-18

Family

ID=15423546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14714379A Pending JPS5673631A (en) 1979-11-15 1979-11-15 Manufacture of needlelike goethite

Country Status (2)

Country Link
JP (1) JPS5673631A (en)
DE (1) DE3043079C2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204644B (en) * 1962-03-30 1965-11-11 Basf Ag Process for the production of acicular iron oxide yellow, alpha-OH, which is particularly suitable as a starting material for the production of highly coercive ª † iron (III) oxide
FR1518716A (en) * 1966-12-21 1968-03-29 Accumulateurs Fixes A method of making an alkaline iron oxysulphate and a method of making high purity, very porous ferric oxide therefrom
DE1792272B1 (en) * 1968-08-13 1971-02-18 Siegle & Co Gmbh G Process for the production of easily dispersible, transparent iron oxide red pigments of the alpha modification
BE792847A (en) * 1971-12-17 1973-06-15 Bayer Ag PROCESS FOR PREPARING ACICULAR MAGNETIC IRON OXIDES
DE2706315A1 (en) * 1977-02-15 1978-08-17 Nihon Sangyo Gijutsu K K Acicular, alpha gesite prodn. - used in alpha iron oxide prepn. for magnetic recording powder

Also Published As

Publication number Publication date
DE3043079C2 (en) 1985-11-14
DE3043079A1 (en) 1981-08-27

Similar Documents

Publication Publication Date Title
JPS54121127A (en) Photographic processing composition
JPS5269898A (en) Production of phosphate pigment
ES471032A1 (en) Purification process
JPS5673631A (en) Manufacture of needlelike goethite
JPS5673632A (en) Manufacture of needlelike goethite
JPS5673633A (en) Manufacture of needlelike goethite
JPS5417113A (en) Poultice
JPS56169130A (en) Manufacture of needlelike goethite
JPS53132499A (en) Production of chromium hydroxide
JPS52123977A (en) Sludge treatment
JPS57130994A (en) Preparation of modified lignin sulfonic acid salt
JPS5580726A (en) Production of needlelike goethite
JPS5536267A (en) Production of phosphate pigment
ES8400372A1 (en) Rapid setting accelerators for cementitious compositions.
JPS53128149A (en) Method of processing waste water from chromium plating
JPS5224188A (en) Treatment of aluminum-sludge including phosphorus
JPS5395900A (en) Production of fine rare earth elements carbonate powder
JPS53122673A (en) Method of treating chromium-containing powdery substance
JPS53109898A (en) Production of gypsum from copper-containing spent sulfuric acid
JPS56169131A (en) Manufacture of needlelike goethite
JPS54138896A (en) Production of alpha-iron oxyhydroxide
JPS5669231A (en) Preparation of needlelike goethite
JPS5341798A (en) Preparing ferromagnetic powdery metal
JPS5289579A (en) Desalting of aqueous solution of salt
JPS57111245A (en) Preparation of iron oxyhydroxide