Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 829, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154533
Keywords
Insulation coating; Soft magnetic materials; Magnetic domain; Ferrites; Loss separation
Categories
Funding
- National Nature Science Foundation of China [U1809215]
- Natural Science Foundation of Zhejiang Province [LY20E020015]
- Key R&D projects of Shandong Province [2019JZZY010318]
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Fe@Composite-Ferrite soft magnetic composites (SMCs) were successfully fabricated by ions doping on the surface of Fe@Fe3O4 powders which can improve the thermal stability and insulation. Compared with the traditional SMCs which were constructed by soft magnetic particle and non-magnetic boundary, this new material maintains high B-m of 1.3214 T at 5000 A/m, 50 Hz, high mu(max) of 625.14 and low P-cm of 10.02 W/kg at 50 Hz, 1.3 T. A three-dimensional simulation loss model and correlation theory of magnetic domain walls were used to analyze the relative loss mechanism and the effect of the new ferrite coating on the domain walls during magnetization. The novel composite-ferrite boundary greatly reduces the pinning, promoting domain wall motion and increasing the number of active magnetic objects. (C) 2020 Elsevier B.V. All rights reserved.
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