Special Issue "Electromagnetic Absorbing Materials"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: 15 October 2020.

Special Issue Editors

Prof. Dr. Pilar Marín
Website
Guest Editor
Departamento de Física de Materiales, Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid, Nacional VI, Km 22,5, 28230 Las Rozas, Spain
Interests: amorphous magnetic materials; nanocrystalline magnetic materials; radara absorbing materials; magnetic sensors
Prof. Dr. Elena Navarro
Website
Guest Editor
Departamento de Física de Materiales, Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid, Nacional VI, Km 22,5, 28230 Las Rozas, Spain
Interests: magnetism; nanostructures; high frequency materials
Dr. Jesús López
Website
Guest Editor
Departamento de Física de Materiales, Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid, Nacional VI, Km 22,5, 28230 Las Rozas, Spain
Interests: magnetic nanopaticles; sol-gel technique; radar absorbing materials

Special Issue Information

Dear Colleagues,

Electromagnetic absorbent materials, in particular microwave attenuating materials (MAMs), have been the subject of many studies in recent years. This fact is due to the proliferation of electronic devices working in the GHz range, both for mobile communications and for the control of devices in the field of medicine, transport or for military purposes. The origin of the attenuation should be sought both in dielectric and magnetic losses as well as in the combination of both. It is worth pointing out that, not only the strong absorption performance, but also lightweight should be considered for MAMs’ practical application.

The challenge of these investigations is to obtain maximum attenuation with materials as light in weight as possible. There are interesting studies carried out with micro- and magnetic nanomaterials embedded in dielectric matrices. In some cases, very good results are obtained by combining these materials with carbon nanotubes or graphene derivatives.

This Special Issue will focus on the latest developments, research findings, and applications of electromagnetic absorbent materials.

Both reviews and original research papers will be considered. Reviews should provide an up-to-date, well-balanced overview of the current state-of-the-art of a particular material or materials combination and include the main results from other groups.

Prof. Dr. Pilar Marín
Prof. Dr. Elena Navarro
Dr. Jesús López
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 papers will be 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. Materials is an international peer-reviewed open access semimonthly 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 2000 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

  • electromagnetic waves absorbing material
  • nanomaterials
  • composites

Published Papers (2 papers)

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Research

Open AccessArticle
Effect of Ball Milling on the Absorption Properties of Fe3O4
Materials 2020, 13(4), 883; https://doi.org/10.3390/ma13040883 - 17 Feb 2020
Abstract
FeCl3∙6H2O was used as raw material to produce Fe3O4, using the solvothermal method with ethylene glycol as the solvent. Fe3O4, with different particle sizes, was obtained via mechanical ball-milling by controlling [...] Read more.
FeCl3∙6H2O was used as raw material to produce Fe3O4, using the solvothermal method with ethylene glycol as the solvent. Fe3O4, with different particle sizes, was obtained via mechanical ball-milling by controlling the milling time. Effect of the milling time on the structure, morphology, and electromagnetic parameters of Fe3O4 were studied, and the absorption properties and mechanism of Fe3O4, for different milling times were analyzed. The results showed that the integrity of the original small spherical structure decreased as the ball milling time increased. Fe3O4 showed excellent microwave absorptions as the milling time reached 2 h, the reflection loss reached the maximum of −21.19 dB at 4.64 GHz as the thickness was 6.55 mm. Full article
(This article belongs to the Special Issue Electromagnetic Absorbing Materials)
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Open AccessArticle
Carbon Fiber and Nickel Coated Carbon Fiber–Silica Aerogel Nanocomposite as Low-Frequency Microwave Absorbing Materials
Materials 2020, 13(2), 400; https://doi.org/10.3390/ma13020400 - 15 Jan 2020
Abstract
Silica aerogel-based materials exhibit a great potential for application in many industrial applications due to their unique porous structure. In the framework of this study, carbon fiber and nickel coated carbon fiber–silica aerogel nanocomposites were proposed as effective electromagnetic shielding material. Herein, the [...] Read more.
Silica aerogel-based materials exhibit a great potential for application in many industrial applications due to their unique porous structure. In the framework of this study, carbon fiber and nickel coated carbon fiber–silica aerogel nanocomposites were proposed as effective electromagnetic shielding material. Herein, the initial oxidation of the surface of carbon fibers allowed the deposition of a durable Ni metallic nanolayer. The fibers prepared in this way were then introduced into a silica aerogel structure, which resulted in obtaining two nanocomposites that differed in terms of fiber volume content (10% and 15%). In addition, analogous systems containing fibers without a metallic nanolayer were studied. The conducted research indicated that carbon fibers with a Ni nanolayer present in the silica aerogel structure negatively affected the structural properties of the composite, but were characterized by two-times higher electrical conductivity of the composite. This was because the nickel nanolayer effectively blocked the binding of the fiber surface to the silica skeleton, which resulted in an increase of the density of the composite and a reduction in the specific surface area. The thermal stability of the material also deteriorated. Nevertheless, a very high electromagnetic radiation absorption capacity between 40 and 56 dB in the frequency range from 8 to 18 GHz was obtained. Full article
(This article belongs to the Special Issue Electromagnetic Absorbing Materials)
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