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62 条记录 (耗时 0.022 秒)

    Process for stabilization of ferromagnetic material and magnetic recording member
    61.
    发明授权
    Process for stabilization of ferromagnetic material and magnetic recording member 失效
    强磁性材料和磁记录元件的稳定化工艺

    公开(公告)号：US4015030A

    公开(公告)日：1977-03-29

    申请号：US591681

    申请日：1975-06-30

    申请人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    发明人： Koji Sasazawa ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

    IPC分类号： H01F1/11 ,  C09D5/23 ,  C09D7/12 ,  G11B5/62 ,  G11B5/706 ,  H01F10/02

    CPC分类号： G11B5/70694

    摘要： A process for stabilizing a ferromagnetic material comprising heat-treating a needle-like ferromagnetic material represented by the formula MO.sub.x wherein M is a ferromagnetic metal ion or a ferromagnetic non-metal ion and another metal ion, and x is the degree of oxidation which ranges from 1.36 to 1.47, and containing at least 0.5 atom % Co, at a temperature of at least about 40.degree. C, and a process for stabilizing a magnetic recording member comprising heat-treating a magnetic recording member produced by providing a ferromagnetic recording layer comprising (a) a ferromagnetic material represented by the formula MO.sub.x wherein M and x are the same as defined above, and containing at least 0.5 atom % Co, and (b) a binder, on a support, at a temperature of at least about 40.degree. C.

    摘要翻译： 一种用于稳定铁磁材料的方法，包括热处理由式MOx表示的针状铁磁材料，其中M是铁磁金属离子或铁磁性非金属离子和另一种金属离子，x是氧化程度 1.36至1.47，并且在至少约40℃的温度下含有至少0.5原子％的Co，以及用于稳定磁性记录元件的方法，该方法包括热处理通过提供铁磁性记录层产生的磁性记录元件，所述磁性记录元件包括 （a）由式MOx表示的铁磁材料，其中M和x与上述定义相同，并且在载体上至少包含至少约40的温度下含有至少0.5原子％的Co和（b）粘合剂 DEG C.

    Ferromagnetic powder for magnetic recording medium and method for preparation thereof
    62.
    发明授权
    Ferromagnetic powder for magnetic recording medium and method for preparation thereof 失效
    磁记录介质用铁磁粉及其制备方法

    公开(公告)号：US3966510A

    公开(公告)日：1976-06-29

    申请号：US497794

    申请日：1974-08-15

    申请人： Masashi Aonuma ,  Yasuo Tamai ,  Goro Akashi

    发明人： Masashi Aonuma ,  Yasuo Tamai ,  Goro Akashi

    IPC分类号： G11B5/712 ,  C09D5/23 ,  C09D7/12 ,  H01F1/06 ,  H01F1/02

    CPC分类号： H01F1/061

    摘要： A ferromagnetic powder which contains at least Fe--B or Fe--Co--B with the surface of the powder having thereon a layer of Cr or a layer mainly consisting of Cr and a method of preparing the ferromagnetic powder comprising reducing a metal salt capable of forming a ferromagnetic powder containing at least Fe or Fe-Co in an aqueous solution thereof with one or more borohydride compounds or derivatives thereof and after the reduction is initiated adding an aqueous solution containing Cr ion or an anion containing Cr.

    摘要翻译： 一种至少含有Fe-B或Fe-Co-B的铁磁粉末，其中粉末的表面上有一层Cr或主要由Cr组成的层，以及制备铁磁性粉末的方法，包括还原金属盐 在一种或多种硼氢化合物或其衍生物的水溶液中形成至少含有Fe或Fe-Co的铁磁粉末，并且在还原开始后，加入含有Cr离子或含Cr的阴离子的水溶液。