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发明公开
CN107635924A ε氧化铁及其制造方法、磁性涂料和磁记录介质 有权

ε氧化铁及其制造方法、磁性涂料和磁记录介质
摘要：
本发明提供ε氧化铁及其制造方法，所述ε氧化铁是铁元素的一部分被置换元素置换而成的ε氧化铁，其具有10～18nm的平均粒径、矫顽力为14kOe以下并且该粒径的变异系数为40％以下。本发明提供ε氧化铁的制造方法，其特征在于，具有如下工序：使羟基氧化铁粘附作为置换元素的金属，得到粘附有前述金属的羟基氧化铁的工序；用硅氧化物涂覆粘附有前述金属的羟基氧化铁，得到涂覆有前述硅氧化物的羟基氧化铁的工序；和、在氧化性气氛下对涂覆有前述硅氧化物的羟基氧化铁进行热处理的工序，从而制造铁元素的一部分被前述置换元素置换而成的ε氧化铁。
摘要（英）：

Provided are: epsilon iron oxide which has an average particle size of 10 to 18 nm, in which a part of an iron element is substituted with a substitution element, and which has a coercive force of 14kOe or less, the coefficient of variation of the particle size being 40% or less; and a method for producing the same. This method for producing the epsilon iron oxide includes: a step of applying metal which is the substitution element to iron oxide-hydroxide to obtain iron oxide-hydroxide to which the metal is applied; a step of coating the iron oxide-hydroxide to which the metal is applied withsilicon oxide to obtain iron oxide-hydroxide coated with the silicon oxide; and a step of heat-treating the iron oxide-hydroxide coated with the silicon oxide under an oxidizing atmosphere. The method is characterized by producing an epsilon iron oxide in which a part of the iron element is substituted with the substitution element.

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