TY - JOUR
T1 - Development of ultra-thin and high-efficient bi-layer microwave absorbers from Fe3N@C and CoS2 samples
AU - Zhao, Jinguo
AU - Nguyen, Thi Kim Yen
AU - Mehrez, Sadok
AU - Mohanavel, V.
AU - Fayed, Mohamed
AU - Mahariq, Ibrahim
AU - Du, Gang
N1 - Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - Nowadays, electromagnetic interference (EMI) is one of the pollution that harm human health and electronic devices. Iron nitride (Fe3N) and cobalt sulfide (CoS2) are promising microwave-absorbing materials (MAMs) due to their intriguing properties. In this work, polygonal Fe3N@C and flower-like CoS2 were fabricated, and Fe3N@C showed pretty good magnetic properties. Microwave absorption properties of as-prepared samples were investigated, where Fe3N@C and CoS2 reached minimum reflection loss (RL) of −12 dB and −23 dB, respectively. In addition, Fe3N@C mostly had no effective absorption bandwidth (EAB), whereas Co2S was 2.5 GHz. The better microwave absorption properties of CoS2 compared to Fe3N@C could be explained through the combination of electrical conductivity, C0 values, loss capacity matching, impedance matching, and attenuation constant. It is worth mentioning that both Fe3N@C and CoS2 could not be considered promising MAMs. Therefore, RL curves of bi-layer MAMs made from as-prepared samples were simulated, where CoS2 and Fe3N@C acted as absorption and matching layers, respectively. The simulated Fe3N@C/CoS2 = 0.6 mm/0.6 mm bi-layer absorber could reach an RL of −45 dB and an EAB of 13 GHz, which was superior to the single-layer ones. The fabricated Fe3N@C/CoS2 = 0.6 mm/0.6 mm bi-layer absorber confirmed these excellent properties, which could be a result of the enhancement of complex permittivity, complex permeability, dielectric, and magnetic loss tangents.
AB - Nowadays, electromagnetic interference (EMI) is one of the pollution that harm human health and electronic devices. Iron nitride (Fe3N) and cobalt sulfide (CoS2) are promising microwave-absorbing materials (MAMs) due to their intriguing properties. In this work, polygonal Fe3N@C and flower-like CoS2 were fabricated, and Fe3N@C showed pretty good magnetic properties. Microwave absorption properties of as-prepared samples were investigated, where Fe3N@C and CoS2 reached minimum reflection loss (RL) of −12 dB and −23 dB, respectively. In addition, Fe3N@C mostly had no effective absorption bandwidth (EAB), whereas Co2S was 2.5 GHz. The better microwave absorption properties of CoS2 compared to Fe3N@C could be explained through the combination of electrical conductivity, C0 values, loss capacity matching, impedance matching, and attenuation constant. It is worth mentioning that both Fe3N@C and CoS2 could not be considered promising MAMs. Therefore, RL curves of bi-layer MAMs made from as-prepared samples were simulated, where CoS2 and Fe3N@C acted as absorption and matching layers, respectively. The simulated Fe3N@C/CoS2 = 0.6 mm/0.6 mm bi-layer absorber could reach an RL of −45 dB and an EAB of 13 GHz, which was superior to the single-layer ones. The fabricated Fe3N@C/CoS2 = 0.6 mm/0.6 mm bi-layer absorber confirmed these excellent properties, which could be a result of the enhancement of complex permittivity, complex permeability, dielectric, and magnetic loss tangents.
KW - Bi-layer absorbers
KW - Cobalt sulfide
KW - Iron nitride
KW - Microwave absorption
KW - Single-layer absorbers
UR - http://www.scopus.com/inward/record.url?scp=85146470480&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2023.01.071
DO - 10.1016/j.ceramint.2023.01.071
M3 - Article
AN - SCOPUS:85146470480
SN - 0272-8842
VL - 49
SP - 14750
EP - 14759
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -
