原子层沉积涂层增强Y2Fe16Si的电磁波吸收

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-07-02 DOI:10.1063/5.0271637

Tianyu Xin, Kewei Li, Shaohua Fan, Yuankang Wang, Pengyu Zhang, Zhou Liu, Qing Xu, Zhaochu Luo, Honglin Du, Wenyun Yang, Changsheng Wang, Jinbo Yang

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引用次数: 0

摘要

金属磁粉的表面改性对金属磁粉与绝缘介质组成的吸波复合材料的高频电磁性能具有重要的调节作用。本研究采用原子层沉积（ALD）技术，在金属磁性Y2Fe16Si粉末表面包裹均匀Al2O3层，提高其高频电磁性能。通过透射电子显微镜和x射线光电子能谱方法对涂层厚度进行了表征，其平均值约为50 nm。发现涂覆层可以显著降低介电常数，从而提高Y2Fe16Si@Al2O3 -石蜡复合材料的阻抗匹配和微波吸收能力。在厚度为2.2 mm时，在9.9 GHz处获得了−63 dB的高反射损耗，在1.6 mm处获得了6.4 GHz的有效吸收带宽。本研究证明了ALD技术在优化金属磁粉材料电磁性能以获得更好的微波吸收方面的潜力。

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Enhanced electromagnetic wave absorption of Y2Fe16Si by atomic layer deposition coating

Surface modification of metallic magnetic powders is important to regulate high-frequency electromagnetic properties for microwave absorbing composite materials composed of these powders and insulating media. In this study, atomic layer deposition (ALD) was applied to coat metallic magnetic Y2Fe16Si powder with uniform Al2O3 layer to improve its high-frequency electromagnetic properties. The thickness of the coating layer was characterized by transmission electron microscopy and x-ray photoelectron spectroscopy methods, with an average value of approximately 50 nm. It was found that the coating layer can significantly decrease the permittivity, and hence improve the impedance matching and the microwave absorption capability of the Y2Fe16Si@Al2O3–paraffin composite. A high reflection loss of −63 dB was achieved at 9.9 GHz with a thickness of 2.2 mm, and an effective absorption bandwidth of 6.4 GHz was obtained at 1.6 mm. This study demonstrates the potential of ALD technology for optimizing the electromagnetic properties of metallic magnetic powder materials for better microwave absorption.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.