公开(公告)号：US5061412A

公开(公告)日：1991-10-29

申请号：US501883

申请日：1990-03-30

申请人： Kunio Okumori ,  Kazuo Terada

发明人： Kunio Okumori ,  Kazuo Terada

IPC分类号： C04B35/26

CPC分类号： C04B35/2683 ,  Y10S264/58

摘要： An iron ore or mill scale is crushed to form a powder having an average particle diameter not exceeding 12 microns. The powder is heated at a temperature of 600.degree. C. to 900.degree. C. in the presence of oxygen to form an iron oxide containing at least 98.0% of Fe.sub.2 O.sub.3. The iron oxide is mixed with strontium oxide or carbonate. The mixture is calcined to form strontium ferrite. The calcined product is pulverized, the crushed material is molded in a magnetic field, and the molded product is sintered to yield a magnet of strontium ferrite having a high level of performance.

摘要翻译： 将铁矿石或粉碎物粉碎以形成平均粒径不超过12微米的粉末。 在氧气存在下，将该粉末在600〜900℃的温度下加热，形成含有至少98.0％的Fe 2 O 3的氧化铁。 氧化铁与氧化锶或碳酸盐混合。 将混合物煅烧形成锶铁氧体。 将煅烧产物粉碎，将破碎的材料在磁场中模制，并将模制产品烧结以产生具有高性能水平的锶铁氧体磁体。

公开(公告)号：US5053156A

公开(公告)日：1991-10-01

申请号：US618937

申请日：1990-11-28

申请人： Kunio Okumori ,  Kazuo Terada

发明人： Kunio Okumori ,  Kazuo Terada

IPC分类号： C01G49/00 ,  C04B35/26 ,  H01F1/34

CPC分类号： C04B35/2683

摘要： A process for producing ferrite powder for high performance ferrite magnets is claimed, which comprises: milling magnetite or mill scale into a powder comprising particles of specified particle size; oxidizing the milled product to obtain a powder containing 98.0% or higher Fe.sub.2 O.sub.3 ; further adding thereto iron oxide originated from iron chloride or iron sulfide together with an oxide or a carbonate of Sr or Ba; and calcining the resulting powder mixture.The present invention provides a low-cost process for producing ferrite powder for ferrite magnets having high pellet strength as well as high magnetic properties, from which a high performance Sr-ferrite magnet as well as Ba-ferrite magnet suitable for use in automobile motors can be readily produced by simply molding the powder under a magnetic field and sintering.

摘要翻译： 一种用于生产用于高性能铁氧体磁体的铁氧体粉末的方法，其特征在于，它包括：将磁铁矿或磨料粉碎成包含特定粒度的颗粒的粉末; 氧化研磨产物得到含有98.0％或更高的Fe 2 O 3的粉末; 进一步添加源自氯化铁或硫化铁的氧化铁与Sr或Ba的氧化物或碳酸盐; 并煅烧所得的粉末混合物。 本发明提供了一种用于制造铁氧体磁铁铁氧​​体粉末的低成本方法，其具有高的颗粒强度以及高的磁性能，其中适用于汽车电动机的高性能Sr-铁氧体磁体以及Ba-铁氧体磁体可由该方法 通过在磁场下简单地成型粉末并烧结容易地制造。