木基多孔炭/铁氧体复合吸波材料的制备与性能表征

doi:10.11896/cldb.20020009

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Abstract In this paper, wood-based porous carbon/ferrite composite microwave absorbing materials (WPC/Fe₃O₄) with excellent properties were prepared by low-temperature pretreatment, vacuum impregnation and high-temperature in-situ growth using masson pine as raw materials. The phase, composition, morphology, and electromagnetic properties were investigated by XRD, XPS, SEM, and VNA. And the mechanism of its absorption was preliminarily explained. The results showed that the WPC/Fe₃O₄ has excellent absorption performance, with the peak reflection loss reaching -35.6 dB, the effective absorption band width exceeding 5.6 GHz, and the effective absorption of all Ku band electromagnetic waves within the thickness range of 3—4.3 mm. WPC/Fe₃O₄ has a regular straight pore structure and a rich heterogeneous interface. Fe₃O₄ nanoparticles grow uniformly in the pores and carbon walls of wood-based porous carbon at high temperatures. As the carbonization temperature increases, the dielectric constant of WPC/Fe₃O₄ increases significantly, but small change in permeability. The electromagnetic loss mechanisms of WPC/Fe₃O₄ are mainly conductive loss, magnetic loss and interfacial polarization loss. The composite materials show high efficiency of Ku band electromagnetic wave, which is expected to achieve its application in the microwave field such as electronic communication or target stealth.

Key words： wood-based porous carbon ferrite reflection loss broadband absorption

Published: 04 June 2021

CLC number:

TB34

Fund:Foundation of Central South University of Forestry and Technology (2018YJ033); the Scientific Research Project of Education Department of Hunan Province (18B173).

About author:: Min Cao, graduated from Central South University of Forestry Technology in June 2018 with a bachelor degree in engineering. She is a master's student in the Faculty of Materials Science and Engineering of Central South Forestry University of Science and Technology. Her main research direction is biomass carbon-based functional materials.
Xianjun Li, professor and doctoral supervisor of School of Materials Science and Engineering, Central South University of Forestry Technology. He is mainly engaged in the research of efficient utilization of wood and bamboo resources. He has published more than 100 research papers and obtained more than 30 national invention patents.
Xi Yang, doctor, working in Central South University of Forestry Technology since 2018. She is mainly engaged in research on biomass carbon-based functional materials and the improvement of bamboo and wood properties. She has published nearly 20 papers in domestic and foreign academic journals.

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	CAO Min
	DENG Yuxi
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	LI Xianjun

Cite this article:

CAO Min,DENG Yuxi,QUAN Peng, et al. Preparation and Characterization of Wood-based Porous Carbon/ Ferrite Composite Microwave Absorbing Materials[J]. Materials Reports, 2021, 35(10): 10029-10035.

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http://www.mater-rep.com/EN/10.11896/cldb.20020009 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10029

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