Design of hierarchical core-shell ZnFe2O4@MnO2@RGO composite with heterogeneous interfaces for enhanced microwave absorption. Issue 4 (15th February 2022)

• Record Type: Journal Article
• Authors: Lu, Zhao; Wang, Yan; Di, Xiaochuang; Cheng, Runrun; Yang, Longqi; Gao, Peihu
• Is Part Of: Ceramics international. Volume 48:Issue 4(2022)
• Page Start: 5217
• Page End: 5228
• Publication Date: 2022-02-15
• Subjects: Hierarchical structure -- ZnFe2O4@MnO2@RGO composite -- Electromagnetic wave absorber -- Synergistic effect -- Heterogeneous interface; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.11.062
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In order to overcome the problems caused by electromagnetic pollution, the design and development of high-performance microwave absorbers is urgently required. In this work, a hierarchical ZnFe2 O4 @MnO2 @RGO composite was successfully fabricated via a facile and rapid hydrothermal method. Its unique core-shell structure and synergistic effect between multiple components are beneficial for electromagnetic wave absorption. The morphology, elemental composition, microstructure and microwave absorption characteristics were systematically studied. With a filler loading of 20 wt%, the composite presents a minimum reflection loss (RLmin ) of −46.7 dB and an effective absorption bandwidth (EAB) as wide as 5.2 GHz at a thickness of 2.5 mm. The superior absorption ability profits from a special microstructure, good impedance matching, multiple attenuation features, interfacial polarization, and the synergistic effect of dielectric and magnetic loss. Consequently, this work lays a foundation for the design of high-performance electromagnetic wave absorbers with multicomponent heterogeneous structures.