Structural Electromagnetic Absorber Based on MoS2/PyC-Al2O3 Ceramic Metamaterials

Liu X, Liu H, Wu H, Zhou Q, Liang H, Liu G, Duan W, Gu Y, Xu C, Travitzky N, Colombo P, Riedel R (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Small Wiley-VCH Verlag

DOI: 10.1002/smll.202300664

Abstract

Limited by the types of suitable absorbents as well as the challenges in engineering the nanostructures (e.g., defects, dipoles, and hetero-interface) using state-of-the-art additive manufacturing (AM) techniques, the electromagnetic (EM) wave absorption performance of the current ceramic-based materials is still not satisfying. Moreover, because of the high residual porosity and the possible formation of cracks during sintering or pyrolysis, AM-formed ceramic components may in many cases exhibit low mechanical strength. In this work, semiconductive MoS2 and conductive PyC modified Al2O3 (MoS2/PyC-Al2O3) ceramic-based structural EM metamaterials are developed by innovatively harnessing AM, precursor infiltration and pyrolysis (PIP), and hydrothermal methods. Three different meta-structures are successfully created, and the ceramic-based nanocomposite benefit from its optimization of EM parameters. Ultra-broad effective absorption bandwidth (EAB) of 35 GHz is achieved by establishment of multi-loss mechanism via nanostructure engineering and fabrication of meta-structures via AM. Due to the strengthening by the PyC phase, the bending strength of the resulting ceramics can reach ≈327 MPa, which is the highest value measured on 3D-printed ceramics of this type that has been reported so far. For the first time, the positive effect deriving from the engineering of the microscopic nano/microstructure and of the macroscopic meta-structure of the absorber on the permittivity and EM absorption performance is proposed. Integration of outstanding mechanical strength and ultra-broad EAB is innovatively realized through a multi-scale design route. This work provides new insights for the design of advanced ceramic-based metamaterials with outstanding performance under extreme environment.

Authors with CRIS profile

Nahum Travitzky Lehrstuhl für Glas und Keramik

Additional Organisation(s)

FAU Profilzentrum Licht.Materie.Quantentechnologien (FAU LMQ)

Involved external institutions

Northwestern Polytechnical University / 西北工业大学 (NPU/NWPU) CN China (CN) Xi’an University of Posts and Telecommunications CN China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) North Carolina State University US United States (USA) (US) University of Padua / Universita degli Studi di Padova IT Italy (IT)

How to cite

APA:

Liu, X., Liu, H., Wu, H., Zhou, Q., Liang, H., Liu, G.,... Riedel, R. (2023). Structural Electromagnetic Absorber Based on MoS2/PyC-Al2O3 Ceramic Metamaterials. Small. https://doi.org/10.1002/smll.202300664

MLA:

Liu, Xingmin, et al. "Structural Electromagnetic Absorber Based on MoS2/PyC-Al2O3 Ceramic Metamaterials." Small (2023).

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