Magnetic material and manufacturing method thereof

Details Magnetic material and manufacturing method thereof Magnetic material and manufacturing method thereof

1996-01-31

1997-11-04

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, C04B 3530

Patent

active

056836171

ABSTRACT:
The invention relates to a magnetic material and a method of manufacturing the same. An objective of the invention resides in providing a magnetic material whose dimensional change rate after sintering is low and whose magnetic property is not deteriorated. In order to achieve the objective, a magnetic material according to the invention comprises a great number of ferrite grains (1) which are formed by sintering ferrite raw powder, and shrinkage preventing grains (2) which are interposed among these plural ferrite grains (1) and which are sintered with the ferrite grains (1) in contact with the outer peripheries thereof and are also oxidized with oxygen so as to change into ferrite when they are sintered.

REFERENCES:
patent: 2700023 (1955-01-01), Albers-Schonberg
patent: 4490268 (1984-12-01), Tchernev
Database WPI Week 9425, Derwent Publications Ltd., London, GB; AN 94-208000 & SU-A-1 809 931 (USSR Structural Makrokinetics Inst.) 15 Apr. 1993.
Database WPI Week 9435, Derwent Publications Ltd., GB; AN 94-284689 & SU-C-2 009 561 (USSR Structural Makrokinetics Inst.) 15 Mar. 1994.
Database WPI Week 8031, Derwent Publications Ltd., London, GB; AN 80-54382C & JP-A-55 080 727 (Mitsubishi) Jun. 19, 1980.
Database WPI Week 9206, Derwent Publications Ltd., London, GB; AN 92-046159 & JP-A-3 291 901 (TDK) 24 Dec. 1991.

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