Soft magnetic composite materials and their preparation methods

Abstract

A soft magnetic composite material and its preparation method are disclosed, belonging to the field of soft magnetic materials technology. The preparation method of the soft magnetic composite material includes preparing ultrafine alloy powders with a D50 particle size of 100-3000 nm from iron, nickel, manganese, aluminum, silicon, and chromium; reacting the ultrafine alloy powders with 3-aminopropyltriethoxysilane and ethyl silicate; and then reacting them with cyclobutanetetracarboxylic dianhydride and 3-aminobenzophenone to obtain the soft magnetic composite material. This invention discloses a soft magnetic composite material with excellent DC bias performance and a superior quality factor, as well as its preparation method.

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