TY - JOUR
T1 - High efficiency microwave absorption nanocomposites of multiple-phase core-shell CoNi alloy@C loaded on rGO conducting network
AU - Zhang, Na
AU - Huang, Ying
AU - Liu, Xudong
AU - Wang, Mingyue
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/12
Y1 - 2018/12
N2 - A novel multiple-phase nanocomposites of core-shell CoNi alloy@C nanoparticles uniformly implanted on graphene conducting network are prepared via combining liquid phase reduction and hydrothermal reaction. The core-shell CoNi alloy@C nanoparticles are uniformly dispersed over graphene nanosheets. The abundant conductive network of reduced graphene oxide is favorable for CoNi alloy@C nanoparticles insertion. Compared to single CoNi alloy and CoNi alloy@C, the ternary CoNi alloy@C/rGO nanocomposites reveal a remarkable increase in microwave absorption. The maximum reflection loss achieves −62.4 dB at 7.84 GHz, and the effective bandwidth of reflection loss below −10 dB (90% attenuation of microwave energy) is up to 14.4 GHz. Meanwhile, through calculation of absorption efficiency, it can be obtained that the nanocomposites have a best absorption performance at 3.3 mm and the efficiency value is 24.88 dB GHz/mm. So this study provides an excellent candidate for military radars, aerospace, electronic instruments and other fields.
AB - A novel multiple-phase nanocomposites of core-shell CoNi alloy@C nanoparticles uniformly implanted on graphene conducting network are prepared via combining liquid phase reduction and hydrothermal reaction. The core-shell CoNi alloy@C nanoparticles are uniformly dispersed over graphene nanosheets. The abundant conductive network of reduced graphene oxide is favorable for CoNi alloy@C nanoparticles insertion. Compared to single CoNi alloy and CoNi alloy@C, the ternary CoNi alloy@C/rGO nanocomposites reveal a remarkable increase in microwave absorption. The maximum reflection loss achieves −62.4 dB at 7.84 GHz, and the effective bandwidth of reflection loss below −10 dB (90% attenuation of microwave energy) is up to 14.4 GHz. Meanwhile, through calculation of absorption efficiency, it can be obtained that the nanocomposites have a best absorption performance at 3.3 mm and the efficiency value is 24.88 dB GHz/mm. So this study provides an excellent candidate for military radars, aerospace, electronic instruments and other fields.
KW - Absorption efficiency
KW - Attenuation
KW - Impedance matching
KW - Multiple-phase nanocomposites
UR - http://www.scopus.com/inward/record.url?scp=85054570238&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2018.10.012
DO - 10.1016/j.compositesa.2018.10.012
M3 - 文章
AN - SCOPUS:85054570238
SN - 1359-835X
VL - 115
SP - 283
EP - 293
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -