Low-Dimensional Electromagnetic Functional Materials
A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".
Deadline for manuscript submissions: 20 October 2024 | Viewed by 297
Special Issue Editor
Special Issue Information
Dear Colleagues,
Electromagnetic functional materials refer to electromagnetic protection materials (including microwave absorption and electromagnetic interference shielding materials), as well as materials with electromagnetic protection properties and other applications. With the arrival of the 5G era, electromagnetic pollution is becoming increasingly serious, and the key to solving electromagnetic pollution is to develop electromagnetic protection materials. Electromagnetic protection materials have become one of the most frequently debated topics in the field of materials research.
Long-term research has shown that low-dimensional materials (usually referring to one-dimensional and two-dimensional materials) have significant advantages in the field of electromagnetic protection, such as a high specific surface area, strong electron transfer ability, and natural defects. A high specific surface area makes it easier to design structures, a strong electron transfer ability can effectively form a surface current to reflect electromagnetic waves, and natural defects can effectively form dipole polarization to effectively attenuate electromagnetic waves. Therefore, introducing low-dimensional materials into the field of electromagnetic protection will be the main development trend of future electromagnetic protection materials.
In recent years, in order to meet the ever-changing military and civilian market demands, electromagnetic protection materials need to meet more application requirements, such as flexible wearability, oxidation resistance, and flame retardancy, among others, including developing into a multifunctional and integrated electromagnetic functional material based on electromagnetic protection applications.
It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.
Dr. Peng He
Guest Editor
Manuscript Submission Information
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Keywords
- microwave absorption
- electromagnetic interference shielding
- low-dimensional materials
- multifunctional electromagnetic protection
Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Modulating Electrical Properties of Ti64/B4C Composite Materials via Laser Direct Manufacturing with Varying B4C Contents
Authors: Wenshu Zhang; Hui Chang; Ning Dang; Lian Zhou
Affiliation: Nanjing Tech University
Abstract: The modulation of electrical properties in composite materials is critical for applications requiring tailored electrical functionality, such as electromagnetic shielding and absorption. This study focuses on Ti64/B4C composites, a material combination promising enhanced electromagnetic properties. The Laser Direct Manufacturing (LDM) utilized to fabricated coaxial samples of Ti64 blended with TiB and TiC in various mass ratios, with sample thicknesses ranging from 0.5 mm to 3.5 mm. The electrical characterization involved assessing the dielectric and magnetic permeability, as well as impedance and reflectance, across a frequency spectrum of 2 to 18 GHz. The result reveal that TiC, when incorporated into Ti64, exhibits strong dielectric polarization and achieves a reflectivity as low as -40 dB between 7 and 14 GHz. Conversely, TiB demonstrates effective electromagnetic absorption, with reflectivity values below -10 dB in the frequency band of 8.5 to 11.5 GHz. The study also notes that a lower B4C content enhances electronic polarization and increases the dielectric coefficient, while higher contents favor ionic polarization. This shift can lead to a timing mismatch in the establishment of electron and ion polarization, resulting in a decreased dielectric coefficient. In addition, adjusting the B4C content in Ti64/B4C composites effectively modulates their electrical properties, suggesting a strategic approach to designing materials for specific electromagnetic functions.
