Title:
MANUFACTURE OF FERROMAGNETIC METALLIC FINE PARTICLE
Document Type and Number:
Japanese Patent JPS59157204
Kind Code:
A
Abstract:
PURPOSE: To improve the uniformity of particles and to increase the squareness ratio of a magnetic tape by sticking a metallic compound to iron oxide or iron oxyhydroxide as a starting material using an org. acid salt of the metal of said metallic compound.
CONSTITUTION: An aqueous soln. of a metallic salt of 1W20C org. carboxylic acid such as the Ni or Co salt is prepd., and the soln. is added to an aqueous suspension of a needlelike starting material. The suspension is made basic by adding a base, a metallic compound is stuck to the starting material, and the starting material is reduced. The influence of harmful anions is eliminated, so the uniformity of particles is improved, and the squareness ratio of a magnetic tape is increased.
More Like This:
Inventors:
YATSU KAZUMASA
ADACHI TAKAHITO
YOSHIZAKI TAKAYOSHI
ADACHI TAKAHITO
YOSHIZAKI TAKAYOSHI
Application Number:
JP2898783A
Publication Date:
September 06, 1984
Filing Date:
February 23, 1983
Export Citation:
Assignee:
CHISSO CORP
International Classes:
G11B5/62; B22F1/16; B22F9/22; B22F9/26; H01F1/06; (IPC1-7): B22F9/22; G11B5/62; H01F1/06
Domestic Patent References:
| JPS5272354A | 1977-06-16 | |||
| JPS54162666A | 1979-12-24 | |||
| JPS5616605A | 1981-02-17 | |||
| JPS5585606A | 1980-06-27 | |||
| JPS57161006A | 1982-10-04 |
Attorney, Agent or Firm:
Yataro Sasai