Magnetic impulse record member
    3.
    发明授权
    Magnetic impulse record member 失效
    磁脉冲记录成员

    公开(公告)号:US3904540A

    公开(公告)日:1975-09-09

    申请号:US37063373

    申请日:1973-06-18

    Applicant: PFIZER

    Abstract: A magnetic impulse record member comprising a binding medium and synthetic magnetic gamma ferric oxide, said member having an orientation ratio of at least 2.4 in a 1000 oersted field, said ferric oxide produced from synthetic lepidocrocite by coating same with at least one 8-24 carbon atom hydrophobic aliphatic monocarboxylic acid, reducing and oxidizing the coated lepidocrocite, and mechanically densifying the gamma ferric oxide product, said synthetic lepidocrocite having very fine-grained, needle-like crystalline particles at least 70 percent of which have a length to width ratio greater than 10:1 and a length up to 2 microns.

    Abstract translation: 一种磁脉冲记录元件,包括粘结介质和合成磁性γ氧化铁,所述元件在1000奥斯特菲尔德场中具有至少2.4的取向比,所述氧化铁由合成的石灰石产生,通过用至少一种8-24碳 原子疏水性脂族单羧酸,还原和氧化涂覆的lepidocrocite,以及机械致密化γ氧化铁产物,所述合成的lepidococite具有非常细粒度的针状结晶颗粒,其至少70%的长宽比大于 10:1,长度可达2微米。

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