The In Situ Preparation of Ni–Zn Ferrite Intercalated Expanded Graphite via Thermal Treatment for Improved Radar Attenuation Property

Ning Xiang; Zunning Zhou; Xiaoxia Ma; Huichao Zhang; Xiangyuan Xu; Yongpeng Chen; Zerong Guo

doi:10.3390/molecules28104128

Molecules (May 2023)

The In Situ Preparation of Ni–Zn Ferrite Intercalated Expanded Graphite via Thermal Treatment for Improved Radar Attenuation Property

Ning Xiang,
Zunning Zhou,
Xiaoxia Ma,
Huichao Zhang,
Xiangyuan Xu,
Yongpeng Chen,
Zerong Guo

Affiliations

Ning Xiang: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Zunning Zhou: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Xiaoxia Ma: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Huichao Zhang: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Xiangyuan Xu: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Yongpeng Chen: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Zerong Guo: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

DOI: https://doi.org/10.3390/molecules28104128
Journal volume & issue: Vol. 28, no. 10
p. 4128

Abstract

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The composites of expanded graphite (EG) and magnetic particles have good electromagnetic wave attenuation properties in the centimeter band, which is valuable in the field of radar wave interference. In this paper, a novel preparation method of Ni–Zn ferrite intercalated EG (NZF/EG) is provided in order to promote the insertion of Ni–Zn ferrite particles (NZF) into the interlayers of EG. The NZF/EG composite is in situ prepared via thermal treatment of Ni–Zn ferrite precursor intercalated graphite (NZFP/GICs) at 900 °C, where NZFP/GICs is obtained through chemical coprecipitation. The morphology and phase characterization demonstrate the successful cation intercalation and NZF generation in the interlayers of EG. Furthermore, the molecular dynamics simulation shows that the magnetic particles in the EG layers tend to disperse on the EG layers rather than aggregate into larger clusters under the synergy of van der Waals forces, repulsive force, and dragging force. The radar wave attenuation mechanism and performance of NZF/EG with different NZF ratios are analyzed and discussed in the range of 2–18 GHz. The NZF/EG with the NZF ratio at 0.5 shows the best radar wave attenuation ability due to the fact that the dielectric property of the graphite layers is well retained while the area of the heterogeneous interface is increased. Therefore, the as-prepared NZF/EG composites have potential application value in attenuating radar centimeter waves.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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