Magnetic properties and lowering core loss in Fe-Si powder cores in high frequency range

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Magnetism and Magnetic Materials Pub Date : 2025-04-01 Epub Date: 2025-02-01 DOI:10.1016/j.jmmm.2025.172816

Mai Phuong Nguyen , Shigeyoshi Yoshida , Satoshi Okamoto , Takamichi Miyazaki , Yasushi Endo

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Abstract

The microstructure and magnetic performance of Fe-6.5 wt% Si soft magnetic powder cores were investigated. Samples annealed up to 1073 K exhibited stable real part of permeability (μ’) across a wide frequency range from 1 kHz to 1 MHz, with the initial value gradually increasing from 52 to 113. Core loss (P_cv) increased with frequency but was strongly dependent on the temperature. The effect of compaction pressure on magnetic properties was also assessed. P_cv separation analysis was conducted to evaluate the mechanisms influenced by compaction pressure. At 50 kHz and 100 mT, the lowest P_cv of 394 kW/m³, combined with a high B_s of 1.56 T and a moderately high permeability of 66, was achieved for the core annealed at 973 K and compacted of 1470 MPa. These findings indicate that Fe-Si powder cores are promising candidates for the power electronic devices operating in the mid-frequency range.

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铁硅粉铁心高频磁特性及降低铁心损耗

研究了Fe-6.5 wt% Si软磁粉芯的显微组织和磁性能。退火至1073 K时，样品的磁导率实部（μ′）在1 kHz至1 MHz的宽频率范围内稳定，初始值从52逐渐增加到113。磁芯损耗（Pcv）随频率增加而增加，但与温度密切相关。并对压实压力对磁性能的影响进行了评价。通过Pcv分离分析，探讨压实压力对Pcv分离的影响机理。在50 kHz和100 mT条件下，在973 K退火和1470 MPa压实条件下，磁芯的最低Pcv为394 kW/m3，高Bs为1.56 T，中高磁导率为66。这些发现表明，铁硅粉芯是中频范围内电力电子器件的理想候选材料。

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.