Title:
MAGNETIC SUBSTANCE AND METHOD OF ITS MANUFACTURE
Document Type and Number:
WIPO Patent Application WO/1994/012990
Kind Code:
A1
Abstract:
The substance has a small dimensional change after burning, and does not deteriorate in its magnetic properties. The magnetic substance consists of ferrite grains (1) formed by burning powdery ferrite material, and contraction preventive grains (2) mixed in the ferrite grains (1) sintered and bonded to the ferrite grains (1) in contact with the contraction preventive grains in burning, and turned into ferrite by oxidation.
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Inventors:
INUZUKA TSUTOMU (JP)
HARADA SHINJI (JP)
FUJI HIROSHI (JP)
OHBA MICHIO (JP)
HARADA SHINJI (JP)
FUJI HIROSHI (JP)
OHBA MICHIO (JP)
Application Number:
PCT/JP1993/001726
Publication Date:
June 09, 1994
Filing Date:
November 25, 1993
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
INUZUKA TSUTOMU (JP)
HARADA SHINJI (JP)
FUJI HIROSHI (JP)
OHBA MICHIO (JP)
INUZUKA TSUTOMU (JP)
HARADA SHINJI (JP)
FUJI HIROSHI (JP)
OHBA MICHIO (JP)
International Classes:
C04B35/26; C04B35/65; (IPC1-7): H01F1/34
Foreign References:
| JPS3920677B1 | ||||
| JPS58135177A | 1983-08-11 | |||
| JPS58135606A | 1983-08-12 | |||
| JPH0397204A | 1991-04-23 | |||
| JPH04142003A | 1992-05-15 |
Other References:
See also references of EP 0623938A4
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