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Manufacture of ferromagnetic powder

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专利汇可以提供Manufacture of ferromagnetic powder专利检索,专利查询,专利分析的服务。并且PURPOSE: To effectively form a magnetic metal cover of such as cobalt and the like as well as to contrive improvement in the electromagnetic conversion characteristics when the titled powder is used as a magnetic recording medium by a method wherein the pretreatment process of oxide magnetic powder is performed using an optical catalytic reaction method, and then a non-electrolytic plating is conducted on the magnetic metal using the method commonly in use.
CONSTITUTION: Oxide magnetic powder is dispersed in the liquid medium containing a reducing agent and the metal ions consisting of a non-magnetic metal having the oxidation-reduction potential for standard hydrogen electrode potential of OeV or more. A non-magnetic metal is deposited on the surface of the oxide magnetic powder by projecting a light, having the wavelength of the energy larger than the energy of band gas of the oxide magnetic powder, on the dispersion liquid. Then, said magnetic powder is dispersed in the liquid medium containing magnetic metal ions, a complexing agent, a reducing agent and a PH buffering agent, and a magnetic metal coating is non-electrolytically plated on the surface of the powder.
COPYRIGHT: (C)1986,JPO&Japio,下面是Manufacture of ferromagnetic powder专利的具体信息内容。

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