Metal treatment – Stock – Magnetic
Patent
1997-01-03
1998-09-01
Sheehan, John
Metal treatment
Stock
Magnetic
75232, 75246, 252 6255, H01F 122
Patent
active
058006362
ABSTRACT:
A dust core is prepared from an iron powder with a particle size of 75-200 .mu.m having added thereto 0.015-0.15 wt % of silica sol, 0.05-0.5 wt % of a silicone resin, and 10-50 wt % based on the silicone resin of an organic titanium compound. By subjecting the iron powder to a curing treatment at 50.degree.-250.degree. C., compacting the powder, and annealing in an inert atmosphere at 550.degree.-650.degree. C., there is obtained a dust core consisting essentially of iron powder particles with a particle size of 75-200 .mu.m, 0.03-0.1% by weight of Si, 15-210 ppm of Ti, and 300-2,500 ppm of oxygen.
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Kanasugi Masaaki
Miyashita Masataka
Okada Kazuhiro
Tsukada Takeo
Yamaguchi Norishige
Sheehan John
TDK Corporation
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