Lightweight and High-Performance Electromagnetic Wave Absorbers Based on Hollow Glass Microspheres and Carbon-Supported Ni-Co Composites
Source abstract
Abstract
With the continuous advancement of electromagnetic protection technologies, the development of lightweight electromagnetic wave-absorbing materials with excellent absorption performance has become a critical challenge in the field. In this study, commercially available hollow glass microspheres (HGMs) were employed as templates, and Ni2+/Co2+ metal ions were used to catalyze the polymerization of dopamine (PDA), forming HGM@NixCoy/PDA precursors. Subsequent high-temperature pyrolysis yielded lightweight composite absorbing materials, denoted as HGM@NixCoy/C. This material integrates dielectric loss, conductive loss, magnetic loss, and resonance absorption mechanisms, exhibiting outstanding electromagnetic wave absorption properties. The absorption performance can be effectively tuned by adjusting the Ni-to-Co ratio, with the optimal performance observed at an atomic ratio of 2:3. At a filler loading of 20 wt.%, HGM@Ni2Co3/C achieved an effective absorption bandwidth (EAB) of 6.83 GHz (ranging from 10.53 to 17.36 GHz) and a minimum reflection loss (RLmin) of −27.26 dB. These results demonstrate that the synergistic combination of hollow glass bubbles and carbon-based magnetic components not only significantly reduces the material density and required filler content but also enhances overall absorption performance, highlighting its great potential in the development of lightweight and high-efficiency electromagnetic wave absorbers.
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Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Material Science and Thermodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Jimei University, Xiamen 361021, China
Xiamen Sunrui Ship Coatings Co., Ltd., Xiamen 361115, China
Laboratory for Advanced Operation and Maintenance of Marine Engine Equipment and Green Intelligent Technology, Beibu Gulf University, Qinzhou 535011, China
Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering, Jimei University, Xiamen 361021, China
Funding
Natural Science Foundation of Fujian Province · Fujian Province Higher Education Industry-University-Research Cooperation Project · Natural Science Foundation of Guangxi Province
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