Title:
MAGNETIC SUBSTANCE AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH0567509
Kind Code:
A
Abstract:
PURPOSE: To provide a magnetic substance which is light in weight and excellent in workability and the manufacturing method of the substance.
CONSTITUTION: A cation radical is produced by extracting one piece of π electron from each carbon ball in which 60, 70, or 84 pieces of carbon atoms are coupled in a spherical state by dispersing and oxidizing the carbon balls in concentrated sulfuric acid. When the π electron is extracted by one piece in such way, unpaired electron spins are added to the carbon balls and the balls are magnetized. The magnetized carbon balls show a ferromagnetic property.
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Inventors:
ATA MASAFUMI
Application Number:
JP25475891A
Publication Date:
March 19, 1993
Filing Date:
September 05, 1991
Export Citation:
Assignee:
SONY CORP
International Classes:
H01F1/00; H01F1/42; (IPC1-7): H01F1/00
Attorney, Agent or Firm:
Akira Koike (3 others)
Next Patent: MANUFACTURE FOR PIEZOELECTRIC CERAMIC RESONATOR