MnFe2O4/ rGO/Diatomite composites with excellent wideband electromagnetic microwave absorption

• Published in: Journal of alloys and compounds 2023-04, Vol.941, p.168851, Article 168851
• Main Authors: Li, Qingyu, Guo, Wanmi, Kong, Xiaotian, Xu, Jiale, Xu, Chunshan, Chen, Yue'e, Chen, Jing, Jia, Xinyu, Ding, Yi
• Format: Article
• Language: English
• Subjects: Composites; Diatomite; Microwave absorption; MnFe2O4; RGO
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.168851

Electromagnetic interference has become one urgent problem in the current society. Efficient preparation of materials with excellent electromagnetic wave absorption is challenging but urgently needed. In this work, MnFe2O4/rGO/Diatomite (M/rGO/DT) cladding structure composites were prepared using a direct, one-step hydrothermal technique. The ternary composite has many microwave absorption mechanisms, including interfacial dipole polarization, conductive loss, natural resonance, flux loss, huge kudos to the three-dimensional cladding cross-linked structure and close-packed MnFe2O4 particles. As a result, compared with unitary or binary composites this ternary composite offers superior capabilities in low and medium frequency microwave absorption. The composite's minimum reflection loss (RLmin) is − 76.56 dB at 7.9 GHz, its thickness is 2.485 mm, and its effective absorption bandwidth (EAB) is up to 3.61 GHz. The remarkable electromagnetic wave attenuation ability of the generated ternary composite shows that the work in this research may provide an innovative and simple technique for the preparation of superior microwave absorbing materials (MAMs). •MnFe2O4/rGO/diatomite composite provides new possibilities for modifying ferrite wave absorbing materials.•This ternary composite offers superior capabilities in low and medium frequency microwave absorption.•Impedance matching and attenuation coefficient cooperatively regulate microwave absorption of composites.