Fabrication Through Ion Crosslinking Method and Microwave Absorption Properties of Fe-Ni-P-S/Carbon Aerogel

doi:10.16552/j.cnki.issn1001-1625.2025.0621

Abstract

Abstract: Porous carbon materials have great application potential in the field of electromagnetic wave absorption. In this paper, a gel with three-dimensional network structure was constructed by coordination crosslinking of metal cations with the polar groups of nanocellulose, and then Fe-Ni-P-S/carbon aerogel (Fe-Ni-P-S/CA) composites were prepared through the process of freeze-drying and calcination. The structure and composition of Fe-Ni-P-S/CA composites were characterized by FTIR, XRD, Raman, SEM and EDS. The results show that in addition to Fe-Ni alloy phase, Fe-Ni-P-S/CA composites also contain compound phases formed by Fe, Ni, and P, S. Carbon aerogel exhibits loose and porous structures. Fe-Ni-P-S/CA composites show excellent microwave absorption properties. The reflection loss reaches a minimum value of -59.63 dB at the simulated matching thickness of 2.0 mm, and the maximum effective absorption bandwidth is up to 4.6 GHz at the simulated matching thickness of 1.9 mm. The porous structure of the carbon matrix enhances the impedance matching characteristics and multiple reflection loss. Fe-Ni alloy and FeP₂ micro-nano particles lead to interfacial polarization loss. The ion crosslinking method used in this paper has simple process, which provides new ideas for the development of biomass-derived carbon-based microwave absorption materials.

Key words: carbon aerogel, nanocellulose, coordination crosslinking, porous structure, Fe-Ni, microwave absorption property

CLC Number:

TB333

ZHOU Weihong, LI Yuhuan, CUI Zijian, JI Yongfeng. Fabrication Through Ion Crosslinking Method and Microwave Absorption Properties of Fe-Ni-P-S/Carbon Aerogel[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(12): 4604-4612.

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