Manufacture of ferromagnetic powder
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 improve the antistatic effect and the electromagnetic conversional characteristics of the titled ferromagnetic powder by a method wherein the material, having the oxidation-reduction potential by the specific value or more for the standard hydrogen electrode potential and the electric resistivity of the specific value or below, is selectively used as the non-magnetic metal with which a non-magnetic metal layer is formed on the surface of magnetic powder.
CONSTITUTION: The oxide magnetic powder, having the energy of band gap from a balance band to a conduction band within the range of 0.5W6.0eV, or the magnetic powder consisting of a metal and/or magnetic alloy powder having an oxide film of the band gap energy same as above on the grain surface, is dispersed into a reducing agent and the liquid medium containing a reducing agent and metal ions consisting of a non-magnetic metal having the oxidation-reduction potential of 0V or above against the standard hydrogen electrode potential and also having the electric resistivity of 10μΩ/cm or below. A beam of light having the energy larger than the energy of the above-mentioned band gap is made to irradiate, the above-mentioned metal ions are reduction-precipitated on the surface of the magnetic powder, and a non-magnetic metal layer is formed. Au, Ag, Pd, Rh, Pt, Ru, Os, Ir, Cu and the like can be used as the above-mentioned metal, but the use of Cu is desirable taking into consideration of economization.
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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