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Lightweight Magnetic Nanoparticle-Graphite Composites with Tunable and Enhanced Electromagnetic Wave Absorption
Dilsad Dolunay Eslek Koyuncu1, Nail Bugra Kilic2, Huseyin Cagri Yavuz1
1Gazi University, Faculty of Engineering, Chemical Engineering Department, Ankara 06570, Turkey.
ACS Omega
|May 11, 2026
Summary
Iron-based magnetic nanoparticle-graphite composites show enhanced electromagnetic interference (EMI) shielding. These materials offer superior magnetic properties and wave absorption for practical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetism
Background:
- Magnetic nanoparticle-graphite hybrid composites are promising for electromagnetic interference (EMI) shielding.
- Understanding the influence of synthesis parameters on composite properties is crucial for optimizing performance.
Purpose of the Study:
- To synthesize Fe, Ni-Fe, and Co-Fe magnetic nanoparticle-graphite composites.
- To investigate the effects of synthesis parameters on material properties and EMI shielding efficiency.
- To identify optimal compositions for absorption-based EMI shielding applications.
Main Methods:
- Coprecipitation method for composite synthesis.
- X-ray diffraction (XRD), FT-IR, SEM, VSM, and XPS for material characterization.
- Electromagnetic interference shielding tests.
Main Results:
- Cubic spinel structure confirmed by XRD.
- Particle size increased with higher Fe content (19-27 nm).
- Anhydrous metal salts yielded larger, porous particles.
- Fe-based composites exhibited superior saturation magnetization and EMI shielding (wave absorption) compared to NiFe and CoFe counterparts.
Conclusions:
- Fe-based magnetic nanoparticle-graphite composites demonstrate excellent magnetic and EMI shielding properties.
- These materials are highly effective for absorption-based EMI shielding applications.
- Synthesis parameters significantly influence composite characteristics and performance.
