Manufacture of compound type magnetically soft magnetic core

Abstract

PURPOSE: To obtain the title magnetic core having high permeability and low iron loss using the magnetic metal powder, on which surface treatment is carried out with silicon Alkyd, as raw material magnetic powder. CONSTITUTION: The surface of magnetic metal powder is coated with silicon alkoxide, the power is heated up in the temperature range of 200 to 700°C in an oxidizing atmosphere, and a silicon oxide film, which is grown by decomposition and oxidization of silicon alkoxide, on the surface of the magnetic metal powder. For example, tetraethoxysilane is diluted with ethanole by a factor of 2, and atomized iron powder is mixed therein. This mixture is heated up, cooled in the furnace, and power of raw material is obtained. To be more precise, the frequency (μ-f) characteristics of the initial permeability of the tetraethoxysilane-treated atomized iron powder in the implementation example 1 and the non-treated material in the comparison example 1 are compared. As a result, the μ of the material of the implementation example 1 does not decrease to 5MHz or thereabout, and μ-f characteristics can be improved clearly. COPYRIGHT: (C)1992,JPO&Japio

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    JP-2002305108-AOctober 18, 2002Matsushita Electric Ind Co Ltd, 松下電器産業株式会社Composite magnetic material, magnetic element and manufacturing method of them
    JP-2008159703-AJuly 10, 2008Fuji Electric Holdings Co Ltd, Toda Kogyo Corp, 富士電機ホールディングス株式会社, 戸田工業株式会社Method of manufacturing thin magnetic component
    JP-4684461-B2May 18, 2011パナソニック株式会社磁性素子の製造方法