Advanced Composite Materials

Topic Information

Dear Colleagues,

This is a call for papers on the topic “Advanced Composite Materials”. Composites represent an attractive, peculiar and varied group of materials which are the impressive result of the synergic collaboration between materials science and technology. They can not only perform multiple functions within a single structure, but they also offer an improved combination of mechanical, electrical, thermal, optical, electrochemical and catalytic properties ranging from nano- to microscale and macroscale. These properties facilitate their use in many fields of application, such as chemical and strain sensing, energy harvesting and storage, actuators, switches, robots, artificial muscles, controlled drug delivery and the built environment. Furthermore, their design flexibility, durability and lightweight characteristics play a crucial role in various industries such as automotive, transportation, wind energy, aerospace and defense, providing solutions to the issue of transitioning the economy toward more sustainable materials and processes with lower environmental footprints. Finally, biobased and bio-inspired composites are considered among the most promising strategies to improve material efficiency and limit the exploitation of natural resources. This topic is an opportunity for the scientific community to present their latest research contributions in the field of Advanced Composites and their applications.

Dr. Sebastiano Candamano
Dr. Ricardo do Carmo
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Applied Sciences applsci	2.5	5.5	2011	19.8 Days	CHF 2400	Submit
Materials materials	3.2	6.4	2008	15.2 Days	CHF 2600	Submit
Buildings buildings	3.1	4.4	2011	14.9 Days	CHF 2600	Submit
Construction Materials constrmater	-	3.1	2021	18.6 Days	CHF 1200	Submit
Fibers fibers	3.9	7.4	2013	23.3 Days	CHF 2000	Submit
Sustainability sustainability	3.3	7.7	2009	19.3 Days	CHF 2400	Submit
Clean Technologies cleantechnol	4.7	8.3	2019	33.7 Days	CHF 1600	Submit

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All Applied Sciences Materials Buildings Construction Materials Fibers Sustainability Clean Technol.

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14 pages, 8738 KB  

Open AccessArticle

Electromagnetic Wave Absorption Properties of Cation-Substituted Ba_0.5Sr_0.5Zn_2−xMe_xFe₁₆O₂₇ (Me = Fe, Ni, Co, Cu, Mn) W-Type Hexagonal Ferrites

by Jae-Hee Heo and Young-Min Kang

Appl. Sci. 2025, 15(17), 9586; https://doi.org/10.3390/app15179586 - 30 Aug 2025

Viewed by 527

Abstract

W-type hexaferrites with compositions Ba_0.5Sr_0.5Zn_2-xMe_xFe₁₆O₂₇ (Me = Fe, Ni, Co, Cu, Mn; x = 1) and Ba_0.5Sr_0.5Zn_2−xMn_xFe₁₆O₂₇ (x [...] Read more.

W-type hexaferrites with compositions Ba_0.5Sr_0.5Zn_2-xMe_xFe₁₆O₂₇ (Me = Fe, Ni, Co, Cu, Mn; x = 1) and Ba_0.5Sr_0.5Zn_2−xMn_xFe₁₆O₂₇ (x = 0–2.0) were synthesized via solid-state reaction and optimized using a two-step calcination process to obtain single-phase or nearly single-phase structures. Their electromagnetic (EM) wave absorption properties were investigated by fabricating composites with 10 wt% epoxy and measuring the complex permittivity and permeability across two frequency bands: 0.1–18 GHz and 26.5–40 GHz. Reflection loss (RL) was calculated and visualized as two-dimensional (2D) maps with respect to frequency and sample thickness. In the 0.1–18 GHz range, only the Co-substituted sample exhibited strong ferromagnetic resonance (FMR) and broadband absorption, achieving a minimum RL of −41.5 dB at 4.84 GHz and a −10 dB bandwidth of 11.8 GHz. In contrast, the other Ba_0.5Sr_0.5Zn_2-xMe_xFe₁₆O₂₇ samples (Me = Fe, Mn, Ni, Cu) showed no significant absorption in this range due to the absence of FMR. However, all these samples clearly exhibited FMR characteristics and distinct absorption peaks in the 26.5–40 GHz range, particularly the Mn-substituted series, which demonstrated RL values below −10 dB over the 32.0–40 GHz range with absorber thicknesses below 1 mm. The FMR frequency varied depending on the substitution type and amount. In the Mn-substituted series, the FMR frequency was lowest at x = 1.0 and increased as x deviated from this composition. This study confirms the potential of Co-free W-type hexaferrites as efficient, cost-effective, and broadband EM wave absorbers in the 26.5–40 GHz range. Full article

(This article belongs to the Topic Advanced Composite Materials)

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