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发明申请
US20050147820A1 Iron oxide powder and a process of producing the same 审中-公开
氧化铁粉末及其制造方法

Iron oxide powder and a process of producing the same
摘要：
Iron oxide powder for an undercoat layer of a coat-type magnetic recording medium having a multilayer structure which comprises cobalt-doped iron oxide particles having an average length of 0.02 to 0.3 μm, an aspect ratio (length to width ratio) of 2 to 13, and a BET specific surface area of 40 to 100 m2/g and containing a cobalt compound in an amount of 0.2 to 10 atom % in terms of cobalt based on total iron.
摘要（中）：

用于具有多层结构的涂层型磁记录介质的底涂层的氧化铁粉末，其包含平均长度为0.02至0.3μm的钴掺杂的氧化铁颗粒，纵横比（长宽比）为2至13 ，BET比表面积为40〜100m 2 / g，含钴量为0.2〜10原子％（以铁计计）。

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