Issue 37, 2021

A novel and facile route for the in situ formation of composites with dual coupling interactions for considerable millimeter wave absorption performance

Abstract

A hard/soft magnetic exchange coupling or ferroelectric–ferromagnetic coupling has been proved to be beneficial for improving microwave absorption properties. Herein, we propose a BaZrxFe12−xO19/Fe3O4/BaZrO3 composite to integrate the advantages of the two couplings. However, the synthesis of BaFe12O19/Fe3O4in situ still remains a challenge due to the different degrees of oxidation resistance. In this work, by delicately exploiting the reducibility of graphene at high temperatures, the BaZrxFe12−xO19/Fe3O4/BaZrO3 composite was successfully prepared in situ by a hydrothermal process combined with a subsequent heat treatment at 600 °C. The two integrable couplings provide good impedance matching and attenuation characteristics for the material system, making it reach a considerable millimeter wave absorption performance around an atmospheric window of 35 GHz with a broad bandwidth of >7.36 GHz (32.64–40.00+ GHz) and a strong RL of −25.4 dB under an extremely thin thickness of 1.00 mm. The strategy provides a novel and facile pathway to design outstanding millimeter wave absorbers.

Graphical abstract: A novel and facile route for the in situ formation of composites with dual coupling interactions for considerable millimeter wave absorption performance

Article information

Article type
Communication
Submitted
21 7 2021
Accepted
20 8 2021
First published
21 8 2021

J. Mater. Chem. C, 2021,9, 12523-12529

A novel and facile route for the in situ formation of composites with dual coupling interactions for considerable millimeter wave absorption performance

C. Liu, T. Jiang, T. Gao, G. Xia, Y. Cao, G. Fang, K. Peng, Y. Zhang, Y. Zhang and K. Zhu, J. Mater. Chem. C, 2021, 9, 12523 DOI: 10.1039/D1TC03398K

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