Abstract: Soft magnetic composites (SMCs) contain metallic magnetic powders embedded in an insulation matrix, and are usually prepared by procedures including powder production, insulation coating, binding, compaction, and annealing. They have attracted extensive interest as fundamental electric and electronic components in the fields of energy, information, transportation, and national defense. With the development of electric and electronic devices with properties suitable for high frequency, large power, energy saving, and being electromagnetically compatible, the demand and requirements for SMCs become significantly higher. The SMC industry in China used to lag far behind overseas competitors with a huge technological gap. The main domestic products were Fe SMCs with only a small amount of alloy SMCs. Such SMCs exhibited low magnetization and unsatisfactory DC-bias properties with double the loss compared to the overseas products. Since 2002, Prof. Mi YAN’s team at Zhejiang University, China has carried out long-term cooperation with related enterprises, achieved key breakthroughs, and invented a series of new SMCs with enhanced performance and low loss. The team has also achieved large-scale production and wide application of the new SMCs, pushing the domestic industry into a world-leading position.

Key words: Soft magnetic, Composite, Power

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