期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 33, 期 13, 页码 10131-10141出版社
SPRINGER
DOI: 10.1007/s10854-022-08003-4
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资金
- Youth Innovation Promotion Association CAS [2021294]
- Science and Technology Service Network Initiative of the Chinese Academy of Sciences [KFJ-STSQYZD-2021-07-002]
- S&T Innovation 2025 Major Special Program [2018B10085, 2021Z038]
- National Natural Science Foundation of China [U1809216]
- K. C. Wong Magna Fund in Ningbo University
In this study, soft magnetic powder cores with a nanoporous-structured phosphate coating were fabricated, which showed a beneficial adsorption effect on the outer resin and enhanced the bonding force between the organic/inorganic coating. Optimized soft magnetic properties were obtained, making it suitable for manufacturing micro-magnetic components.
The phosphating treatment method has been extensively applied in the field of insulating soft magnetic powders because of its simplicity and ease of operation; however, the specific nanoscale morphology of phosphate coating layers and the interface/connection/interaction with the outer resin are still unclear. In this study, soft magnetic powder cores (SMPCs) with a nanoporous-structured phosphate coating were fabricated, in which the coating has a beneficial adsorption effect on the outer resin and can enhance the bonding force between the organic/inorganic coating. Optimized soft magnetic properties were obtained for the SMPCs with a phosphoric acid content of 0.6 wt%, including a high effective permeability of 61, low core loss of 134.6 mW/cm(3) (measured at 100 mT, 50 kHz), and high DC bias performance of 56% under a superimposed field of 100 Oe due to the favorable interactions between the insulating coating layers. These properties can be used to manufacture micro-magnetic components.
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