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    • 5. 发明授权
    • Process for production of ferromagnetic powder and apparatus therefor
    • 铁磁粉末生产方法及其设备
    • US4141763A
    • 1979-02-27
    • US784747
    • 1977-04-05
    • Masashi AonumaYasuo TamaiTatsuji KitamotoFumio Kodama
    • Masashi AonumaYasuo TamaiTatsuji KitamotoFumio Kodama
    • B22F9/24H01F1/06
    • B22F9/24H01F1/065
    • A process for producing a ferromagnetic powder comprising injecting a stream of an aqueous solution of a metal salt capable of forming a ferromagnetic substance and a stream of solution containing a reducing material for mixing into a reaction chamber such that the two solutions impinge upon one another causing an oxidation-reduction reaction between them to occur, and applying a magnetic field of 50 oe or more to the particles produced by the oxidation-reduction reaction for the period during which the particles become ferromagnetic particles after going through a superparamagnetic state and an apparatus for use in the practice of the above process comprising a reaction vessel, at least one nozzle for injecting each of a solution of a metal salt and a solution containing a reducing material into the reaction vessel and a magnet for producing a magnetic field in the reaction vessel with the nozzles being open to the magnetic field and positioned so that the solution of the metal salt and the solution of the reducing material when injected are mixed.
    • 一种制造铁磁粉末的方法,包括将能形成铁磁性物质的金属盐的水溶液流和含有还原材料的溶液流混合到反应室中,使得两种溶液彼此撞击导致 在它们之间发生氧化还原反应,并且在通过超顺磁性状态的颗粒变成铁磁颗粒的时期之后,对由氧化还原反应产生的颗粒施加50ee或更大的磁场, 用于上述方法的实践中,包括反应容器,用于将金属盐溶液和含有还原材料的溶液中的每一个注入反应容器的至少一个喷嘴和用于在反应容器中产生磁场的磁体 其中喷嘴对磁场开放并且定位成使得金属盐a的溶液 并且当注入时将还原材料的溶液混合。