Designing Advanced Soft Magnetic Powder Cores with Ultralow Energy Loss by Combining Ultrasonic and Static Compaction
Source abstract
Abstract
ABSTRACT Power inductors are critical in electronics and automotive systems, with integrated inductors gaining attention for miniaturization and high power efficiency. Iron‐based amorphous/nanocrystalline soft magnetic powders offer high permeability and low core loss, yet their high strength and brittleness pose compaction challenges. This study introduces an ultrasonic vibration‐assisted cold pressing (UVP‐CP) technique, which promotes particle rearrangement and interlocking by reducing interparticle friction, enabling the fabrication of dense powder cores under reduced forming pressure. Compared with conventionally cold pressed cores fabricated from the same powder system, the UVP‐CP samples exhibit improved soft magnetic performance, achieving an effective permeability ( µ e ) of 47.8 at 10 MHz and a core loss of 175.8 mW/cm 3 at 50 mT/100 kHz. These values represent a 21.0% improvement in permeability and a 43.4% reduction in core loss over conventional counterparts, establishing a new paradigm for high performance integrated inductor fabrication.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic Properties of Alloys · Metallic Glasses and Amorphous Alloys · Nanomaterials and Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Science Zhejiang Key Laboratory of Magnetic Materials and Applications Ningbo China
School of Materials Science and Chemical Engineering Ningbo University Ningbo China
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China
Department of Electrical Engineering North China Electric Power University Baoding China
Shenzhen Sunlord Electronics Co., Ltd Shenzhen China
North China Electric Power University Beijing China
Funding
National Natural Science Foundation of China
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