Boosting Microwave Absorption Performance of Bio-Gel Derived Co/C Nanocomposites
Zhong Y. Liu D. Yang Q. Qu Y. Yu C. Yan K. Xie P. Qi X. Guo Z. Toktarbay Z.
2023Engineered Science Publisher
Engineered Science
2023#26
The Co/C nanocomposites toward outstanding electromagnetic (EM) microwave absorption were meticulously designed and prepared by bio-gel method. The Co nanoparticles were embedded into the carbon network constructed by agar powder. Our obtained Co/C nanocomposites exhibited excellent EM wave absorption performance including wide bandwidth (7.1 GHz), thin thickness (1.71 mm), light weight and wide effective absorbing frequency. Dielectric relaxation at multilayer interfaces, porous biomass carbon materials and magnetic Co nanoparticles are the main sources for enhancing the wave absorption properties. The amorphous carbon in the material prevents the condensation and oxidation of magnetic Co nanoparticles, thus contributing to the generation of good impedance matching. On the basis of the percolation theory, the optimal Co content was determined, and a percolation model suitable for Co/C materials was established.
Dielectric loss , High-performance microwave absorption , Magnetic loss , Percolation , Porous Co/C nanocomposites
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College of Physics, Guizhou University, Guiyang, 550025, China
College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, China
Qingdao Municipal Hospital, Qingdao, 266000, China
State Key Laboratory of Material-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China
Integrated Composites Lab, Department of Mechanical and Construction Engineering, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom
Laboratory of Engineering Profile, Satbayev University, Satbayev St. 22a, Almaty, 050013, Kazakhstan
College of Physics
College of Materials Science and Engineering
Qingdao Municipal Hospital
State Key Laboratory of Material-Oriented Chemical Engineering
Integrated Composites Lab
Laboratory of Engineering Profile
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026