Excellent electromagnetic wave absorption of Co/Fe2O3 composites by additional activated carbon for tuning the optical and the magnetic properties

•The composite Co/Fe2O3/AC was achieved through a simple milling method at 10 Hz for 1 hour.•The 20% AC is excellent electromagnetic absorption with minimum RL -69.39 dB, thickness 4 mm at the frequency 11.302 GHz.•For 15% AC shows an RL value of -61.74 dB for the thickness of 3 mm at the frequency...

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Bibliographic Details
Published in:Journal of alloys and compounds 2021-05, Vol.864, p.158780, Article 158780
Main Authors: Tahir, Dahlang, Heryanto, Heryanto, Ilyas, Sultan, Fahri, Ahmad Nurul, Rahmat, Roni, Rahmi, Mufti Hatur, Taryana, Yana, Sukaryo, Sulistiyoso Giat
Format: Article
Language:English
Subjects:
Absorption
Activated carbon
Composite Co/Fe2O3
Electromagnetic radiation
FTIR
Magnetic properties
Microwave absorption properties
Optical properties
Reflection loss
Structural properties
Thickness
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Summary:•The composite Co/Fe2O3/AC was achieved through a simple milling method at 10 Hz for 1 hour.•The 20% AC is excellent electromagnetic absorption with minimum RL -69.39 dB, thickness 4 mm at the frequency 11.302 GHz.•For 15% AC shows an RL value of -61.74 dB for the thickness of 3 mm at the frequency 11.19 GHz.•Carbon act as a net and capturing the big ball from the Co ion and Fe ion with a large radius compared with C atoms.•The EM hit atoms cobalt, iron, oxygen, and carbon, transfer energy resulting vibration the atoms and lattice. The new absorbing materials, thin, light, and strong become a challenge and attract more scientists to find excellent absorption performance. In this work, the composite Co/Fe2O3/AC was achieved through a simple milling method at 10 Hz for 1 h. The Co/Fe2O3/AC for 20%AC has an excellent absorption of electromagnetic wave performance with a minimum reflection loss (RL) value of −69.39 dB for the thickness of 4 mm at the frequency 11.302 GHz, followed by 15% AC with an RL value of −61.74 dB for the thickness of 3 mm at the frequency 11.19 GHz. The excellent absorption performance is related to conductivity loss, multiple reflections, electron hoping, and scattering caused by the unique arrangement of atoms. The study provided new and high potentials composite for the development of electromagnetic wave absorbing materials.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.158780