Next-generation laminated nanocrystalline magnetic cores for high-frequency power electronics: enhancing magnetic properties and thermal stability

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-13 DOI:10.1016/j.jmmm.2025.173299

Kuang-Heng Wan , Hsing-I Hsiang

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Abstract

This study presents the development of next-generation laminated nanocrystalline magnetic cores designed for high-frequency power electronics, with a focus on enhancing magnetic performance and thermal stability. Fe-based amorphous alloy ribbons were used as the base material and subjected to optimized annealing treatments to induce controlled nanocrystallization. To suppress interlayer eddy currents and improve mechanical integrity, a spin-coating method was employed to incorporate nickel-zinc ferrite (NZF) nanoparticles, which were surface-modified using titanate coupling agents to enhance dispersion and thermal resistance.

The results demonstrate that optimized thermal treatment significantly reduces coercivity and improves saturation magnetization by promoting the formation of fine α-Fe(Si) nanocrystals. The incorporation of NZF nanoparticles further enhances high-frequency performance by increasing interlaminar resistivity and improving magnetic flux continuity. The fabricated laminated cores exhibit reduced core loss, improved inductance stability under DC bias, and extended resonant frequency range, indicating strong potential for integration into high-frequency inductors, transformers, and wireless power transfer systems. These findings provide a scalable and effective materials strategy for realizing compact, thermally stable, and energy-efficient magnetic components in next-generation power electronics.

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用于高频电力电子的下一代层压纳米晶磁芯：增强磁性和热稳定性

本研究介绍了为高频电力电子设计的下一代层压纳米晶磁芯的开发，重点是提高磁性能和热稳定性。以铁基非晶态合金带为基材，通过优化退火处理诱导可控纳米化。为了抑制层间涡流，提高机械完整性，采用自旋涂覆方法包裹镍锌铁氧体纳米颗粒，并使用钛酸盐偶联剂对其进行表面改性，以提高分散性和耐热性。结果表明，优化后的热处理通过促进α-Fe（Si）纳米晶的形成，显著降低了矫顽力，提高了饱和磁化强度。NZF纳米颗粒的掺入通过增加层间电阻率和改善磁通连续性进一步提高了高频性能。制备的层压铁芯具有降低铁芯损耗、提高直流偏置下的电感稳定性和扩展谐振频率范围的特点，表明其在高频电感器、变压器和无线电力传输系统中的集成潜力巨大。这些发现为实现下一代电力电子中紧凑、热稳定和节能的磁性元件提供了一种可扩展和有效的材料策略。

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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.