公开(公告)号：US5800636A

公开(公告)日：1998-09-01

申请号：US779240

申请日：1997-01-03

申请人： Takeo Tsukada ,  Masaaki Kanasugi ,  Masataka Miyashita ,  Kazuhiro Okada ,  Norishige Yamaguchi

发明人： Takeo Tsukada ,  Masaaki Kanasugi ,  Masataka Miyashita ,  Kazuhiro Okada ,  Norishige Yamaguchi

IPC分类号： B22F1/00 ,  C22C33/02 ,  H01F1/20 ,  H01F1/24 ,  H01F27/255 ,  H01F41/02 ,  H01F1/22

CPC分类号： H01F41/0246 ,  H01F1/24

摘要： 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.

摘要翻译： 粉末核心由粒径为75〜200μm的铁粉制成，添加了0.015〜0.15重量％的硅溶胶，0.05〜0.5重量％的有机硅树脂，10〜50重量％ 有机钛化合物的有机硅树脂。 通过使铁粉在50-250℃下进行固化处理，压实粉末，并在550-650℃的惰性气氛中进行退火，得到一个主要由铁粉末和 粒径为75-200μm，Si 0.03-0.1重量％，Ti为15-210ppm，氧为300-2,500ppm。