阻抗匹配策略提升氮掺杂单壁碳纳米角吸波性能研究

doi:10.19964/j.issn.1006-4990.2024-0189

Abstract

Abstract:

Single-walled carbon nanohorns（CNHs） are promising lightweight materials for electromagnetic wave absorption.Their“dahlia-like” structure facilitates multiple scattering and dissipation of electromagnetic waves.To solve the issue of poor X-band absorption performance in CNHs due to impedance mismatch，the dielectric barrier discharge（DBD） plasma with oxygen and nitrogen gas was utilized to optimize the impedance matching of nitrogen-doped single-walled carbon nanohorns（NCNHs）.By controlling the amount of surface oxygen functional groups，the absorption performance of NCNHs in the X-band was enhanced.After oxygen DBD treatment，O-NCNHs achieved a minimum reflection loss（RL_min） of -42.93 dB at a thickness of 2.6 mm，with an effective absorption bandwidth（EAB） of 4.14 GHz at a thickness of 1.6 mm.After nitrogen DBD treatment，N-NCNHs exhibited an RL_min of -47.88 dB at a thickness of 2.8 mm，with an EAB of 3.72 GHz at a thickness of 1.8 mm.The improvement in absorption performance could be attributed to the impedance matching achieved through DBD treatment and the balance between attenuation capability and impedance matching ability.Specifically，by regulating the amount of surface oxygen functional groups through DBD treatment，NCNHs' impedance matching was improved.This study provided a new approach for optimizing impedance matching in high-performance absorbers.

Key words: nitrogen doped single-wall carbon nanohorns, dielectric barrier discharge plasma, electromagnetic wave absorption, impedance matching

CLC Number:

TQ127.1

LIU Yichang, XIE Zhipeng, LIU Yunfeng, ZHANG Da, LIANG Feng. Study on impedance matching strategy of enhancing microwave absorption performance of nitrogen-doped single-walled carbon nanohorns[J]. Inorganic Chemicals Industry, 2024, 56(12): 29-34.

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Study on impedance matching strategy of enhancing microwave absorption performance of nitrogen-doped single-walled carbon nanohorns

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