Wave Absorption Properties of Co-C Nanoparticles Prepared by the Gaseous Detonation Method
T.-J. Zhao1,2,3, X.-H. Wang2, S. Kang1, Z.-F. Wang1, H.-H. Yan2
1Henan University, Kaifeng, 475004 China
2Dalian University of Technology, Dalian, 116024 China
3Henan Provincial Research Center of Engineering on Intelligent Construction of Rail Transit, Kaifeng, 475004 China
Keywords: gaseous detonation, wave absorption, Co-C nanoparticles, impedance matching
Abstract
Co-C nanoparticles are synthesized via the detonation of benzene and oxygen with cobalt(III) acetylacetonate as a precursor, and the influence of heat treatment on their physical performances is explored. The results indicate that the crystallinity and degree of graphitization of Co-C nanoparticles are dramatically improved after heat treatment, and the impedance matching degree also increases significantly. The wave absorption property is enhanced by more than six times, and the minimum reflection loss is -17.5 dB at 16.98 GHz. The impedance mismatching is the main reason for the poor wave absorption of original Co-C nanoparticles. The temperature plays an important role in the impedance matching degree and wave absorption performance, and a heat-treated process can be a useful way to solve impedance mismatching of Co-C nanoparticles prepared by gaseous detonation.
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