JPS5595627A - Manufacture of magnetic material - Google Patents

Manufacture of magnetic material

Info

Publication number
JPS5595627A
JPS5595627A JP225080A JP225080A JPS5595627A JP S5595627 A JPS5595627 A JP S5595627A JP 225080 A JP225080 A JP 225080A JP 225080 A JP225080 A JP 225080A JP S5595627 A JPS5595627 A JP S5595627A
Authority
JP
Japan
Prior art keywords
slurry
alkali
magnetic material
naoh
citric acid
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
JP225080A
Other languages
Japanese (ja)
Other versions
JPS5617290B2 (en
Inventor
Seiji Matsumoto
Tadashi Shoka
Kiyoshi Fukai
Shinya Nakatani
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.)
Sakai Chemical Industry Co Ltd
Original Assignee
Sakai Chemical Industry Co Ltd
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 Sakai Chemical Industry Co Ltd filed Critical Sakai Chemical Industry Co Ltd
Priority to JP225080A priority Critical patent/JPS5595627A/en
Publication of JPS5595627A publication Critical patent/JPS5595627A/en
Publication of JPS5617290B2 publication Critical patent/JPS5617290B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE: To provide a magnetic material with superior dispersibility, magnetic field orientation properties, etc. by adding an alkali to a slurry contg. ferric hydroxide, citric acid (salt) and an alkali cpd. to adjust the slurry to a specified pH value followed by heating at a specified temp.
CONSTITUTION: An alkali such as NaOH is added to a slurry contg. a predetermined amt. of ferric hydroxide, citric acid or its slat, and an alkali cpd. such as NaOH so that the slurry is adjusted to pH10W13 at 25°C. The pH-adjusted slurry is heated to a treatment temp. of 100W250°C and agitated to form needlelike α-Fe2O3, which is then separated by heat reduction or other method to obtain magnetite taking over the needle form of α-Fe2O3. The magnetite may be reoxidized to give γ-Fe2O3 taking over the needle form. The magnetic material for recording obtd. by this method has no pore in the particles and high density, is free from branching, and exhibits superior magnetic characteristics.
COPYRIGHT: (C)1980,JPO&Japio
JP225080A 1980-01-12 1980-01-12 Manufacture of magnetic material Granted JPS5595627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP225080A JPS5595627A (en) 1980-01-12 1980-01-12 Manufacture of magnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP225080A JPS5595627A (en) 1980-01-12 1980-01-12 Manufacture of magnetic material

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP13708777A Division JPS5469594A (en) 1977-11-14 1977-11-14 Production of ferric oxide and magnetic material

Publications (2)

Publication Number Publication Date
JPS5595627A true JPS5595627A (en) 1980-07-21
JPS5617290B2 JPS5617290B2 (en) 1981-04-21

Family

ID=11524106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP225080A Granted JPS5595627A (en) 1980-01-12 1980-01-12 Manufacture of magnetic material

Country Status (1)

Country Link
JP (1) JPS5595627A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123831A (en) * 1981-01-20 1982-08-02 Sakai Chem Ind Co Ltd Preparation of magnetic iron oxide powder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148895A (en) * 1984-01-11 1985-08-06 株式会社日立製作所 Electric chain block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123831A (en) * 1981-01-20 1982-08-02 Sakai Chem Ind Co Ltd Preparation of magnetic iron oxide powder
JPS6029646B2 (en) * 1981-01-20 1985-07-11 堺化学工業株式会社 Method for producing magnetic iron oxide powder

Also Published As

Publication number Publication date
JPS5617290B2 (en) 1981-04-21

Similar Documents

Publication Publication Date Title
JPS5792527A (en) Preparation of needle-like ferric oxide
JPS57123831A (en) Preparation of magnetic iron oxide powder
KR850003025A (en) Hexagonal barium ferrite particles for magnetic recording and manufacturing method thereof
JPS57124356A (en) Binary magnetic developer
JPS5595627A (en) Manufacture of magnetic material
EP0178269A3 (en) Method for the preparation of fine hexagonal ferrite powders, in particular, for magnetic recording
GB2001942A (en) Methods of making magnetic powders and magnetic recording media including magnetic powders so made
JPS55164092A (en) Noncrystalline alloy-plated layer and its manufacture
JPS5469594A (en) Production of ferric oxide and magnetic material
GB1395704A (en) Magnetic materials
JPS56155023A (en) Preparation of ba-ferrite
MY107614A (en) Acicular ferromagnetic iron oxide particles and process for producing the same
JPS5520278A (en) Production of magnetic powder for magnetic recording medium
JPS57124404A (en) Manufacture of magnetic iron oxide powder
JPS5556016A (en) Production of ferromagnetic powder
JPS5678430A (en) Production of iron compound particle for magnetic recording
JPS5756326A (en) Manufacture of magnetic powder for magnetic recording medium
JPS52141609A (en) Magnetic recording medium and its production
JPS5556605A (en) Magnetic recording medium
JPS5583208A (en) Preparation of ferromagnetic powder
JPS56160329A (en) Manufacture of magnetic iron oxide powder
JPS5556018A (en) Production of ferromagnetic powder
JPS5625904A (en) Ferromagnetic powder and its preparation
JPS5571631A (en) Production of cobalt-containing iron oxide magnetic powder
JPS5573803A (en) Production of magnetic alloy powder