Research Progress on Insulation Coating Technology for Soft Magnetic Composites

Soft magnetic composites (SMCs) have the advantages of high permeability as silicon steel sheet and low eddy current loss as ferrite core, and have more extensive application for magnetic core. Insulation coating technology is one of the key processes for SMCs. This paper is a review on patents and scientific research literatures related to insulation coating materials and coating technologies for SMCs. The insolution coating materials include organic, inorganic, mixture and new type coating treatment, especially inorganic includes mineral acids or salts coating, nano oxide coating and magnetic substance coating. Finally, the development on insulation coating technology for SMCs is also discussed. Keywords: Coating technology, insulation coating materials, magnetic properties, patents, progress, soft magnetic composites.