公开(公告)号：US4400337A

公开(公告)日：1983-08-23

申请号：US337149

申请日：1982-01-05

申请人： Yukihiro Hayashi ,  Toshinobu Sueyoshi ,  Shigeo Hirai ,  Mikio Kishimoto ,  Katsunori Tashita ,  Masahiro Amemiya

发明人： Yukihiro Hayashi ,  Toshinobu Sueyoshi ,  Shigeo Hirai ,  Mikio Kishimoto ,  Katsunori Tashita ,  Masahiro Amemiya

IPC分类号： H01F1/06 ,  C04B15/14

CPC分类号： H01F1/065 ,  H01F1/061

摘要： A method for the production of uniform acicular metal magnetic particles comprising predominantly iron which have excellent magnetic characteristics and are useful as a recording element for a magnetic recording medium, said method comprising the steps of coating the surface of metal compound particles containing predominantly acicular iron oxyhydroxide or iron oxides with at least one member selected from the group consisting of an aluminum compound and a silicon compound, pelletizing the coated particles, and reducing the pellets with heating under reducing atmosphere, e.g. under hydrogen stream.

摘要翻译： 一种生产均匀的针状金属磁性颗粒的方法，其主要是铁，其具有优异的磁特性并且可用作磁记录介质的记录元件，所述方法包括以下步骤：涂覆主要为针状羟基氧化铁的金属化合物颗粒的表面 或具有选自铝化合物和硅化合物中的至少一种的氧化铁，造粒涂覆颗粒，并在还原气氛下加热还原颗粒，例如 在氢气流下。