Advances of Soft Magnetic Particles and Composites towards Electromagnetic Wave Applications

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Applications of Magnetism and Magnetic Materials".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 1889

Special Issue Editors


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Guest Editor
School of Science, Wuhan University of Technology, Wuhan 430070, China
Interests: microwave absorption; soft magnetic materials; crystallography

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Interests: metamaterials; soft magnetic materials; microwave absorption
School of Microelectronics, Hubei University, Wuhan 430062, China
Interests: soft magnetic materials; hexagonal ferrite; microwave absorption

Special Issue Information

Dear Colleagues,

Soft magnetic particles can simultaneously interact with magnetic and electric fields of electromagnetic waves, and hence exhibit important responses, shielding or absorption properties. However, development in this field has long been limited by many challenges, such as low absorption, narrow bandwidth, large thickness, lack of theoretical understanding for composition design and kinetic processes, difficulties in controlling frequency-dispersion behavior of permeability/permittivity, and low efficiency in the surface modulation of particles for composites and applications.

In this Special Issue, we invite scientists and investigators to contribute original high-quality research and review articles which address the challenges and advances of magnetic particles. Topics of interest include, but are not limited to:

(i) Theoretical design and experimental verification of novel soft magnetic metal/alloy/oxide particles and their composites;

(ii) Interaction mechanism between electromagnetic properties and nano/microscale defects, crystalline structure, phase composition, texture, and spatial orientation of soft magnetic particles;

(iii) Novel methods for controlling the surface status and wettability of soft magnetic particles and composites;

(iv) Novel properties and applications of soft magnetic particles and their composites;

(v) Fabrication and electromagnetic properties of soft metals, alloys, ferrites and their composites with polymers.

Prof. Dr. Zhihong Chen
Prof. Dr. Wei Li
Dr. Qifan Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • first-principles calculation for magnetic compounds
  • molecular dynamics for environmental behavior of magnetic particles
  • novel physics phenomenon of microwave–material interaction
  • soft magnetic alloys
  • ferrite
  • magnetic oxide
  • nanocrystalline soft magnetic particles
  • metamaterials and composites including magnetic particles
  • magnetic loss
  • magnetic resonance
  • magnetic domain resonance
  • frequency dispersion of permeability
  • microwave absorption
  • electromagnetic interference and shielding

Published Papers (1 paper)

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Research

11 pages, 2697 KiB  
Article
Electromagnetic Property Modulation of Flaky Ferromagnetic 304 Stainless-Steel Powders for Microwave Absorption at Elevated Temperatures
by Bolin Yang, Yifan Xu, Zhihong Chen, Hang Yang, Yuchen Hu, Haoqin Wu, Mingfeng Xing, Jianguo Guan and Wei Li
Magnetochemistry 2023, 9(9), 208; https://doi.org/10.3390/magnetochemistry9090208 - 5 Sep 2023
Viewed by 1283
Abstract
Soft magnetic metallic absorbents suffer from severe oxidation, reduction in permeability and deterioration in microwave absorption when exposed to high temperatures. In this study, we prepared flaky 304 stainless-steel powders as new microwave absorbents via deformation-induced ferromagnetism. The 304 stainless-steel powders showed significant [...] Read more.
Soft magnetic metallic absorbents suffer from severe oxidation, reduction in permeability and deterioration in microwave absorption when exposed to high temperatures. In this study, we prepared flaky 304 stainless-steel powders as new microwave absorbents via deformation-induced ferromagnetism. The 304 stainless-steel powders showed significant increases in saturation magnetization (Ms) from 1.03 to 82.46 emu/g when their shape was changed from spheroids to flakes; the Ms further increased to 92.29 emu/g after heat treatment at 500 °C in air. The permeability of 304 alloy powders also showed an obvious increase after ball milling and remained roughly stable after heat treatment at 500 °C in air. Moreover, the permittivity exhibited a sharp decrease after heat treatment, enabling the improvement of impedance matching and microwave absorption. After heat treatment at 500 °C in air for 100 h, the simulated reflection loss of 304 stainless-steel powders with wax still showed attractive levels, giving a minimum value of −22 dB and remaining below −6 dB over 8.5–16.5 GHz at a thickness of 2 mm. Our work can help to include paramagnetic alloy systems as new microwave absorbents for working in harsh environments. Full article
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