Enhanced microwave absorption properties of flake-shaped FeCo/BaFe12O19 composites. Issue 9 (1st May 2021)

• Record Type: Journal Article
• Authors: Gong, Haonan; Tan, Shujuan; Zheng, Jing; Peng, Kangsen; Zhang, Yanting; Hu, Yunjia; Duan, Songhan; Xu, Guoyue
• Is Part Of: Ceramics international. Volume 47:Issue 9(2021)
• Page Start: 12389
• Page End: 12396
• Publication Date: 2021-05-01
• Subjects: FeCo/BaFe12O19 composites -- Barium ferrite BaFe12O19 -- Flake-shaped structure -- Dielectric and magnetic loss -- Microwave absorption; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.01.093
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, flake-shaped FeCo/BaFe12 O19 composites were successfully prepared via a facile two-step process involving ball milling and sol-gel treatment. Compared with commonly used FeCo alloys, FeCo/BaFe12 O19 composite material can achieve remarkable microwave absorption performance, and this is largely because of the flake-shaped structure and dielectric relaxation processes. Furthermore, changing mass fractions of BaFe12 O19 enable flexible control of applicable frequency ranges of FeCo/BaFe12 O19 composites. It was found that when the BaFe12 O19 mass fraction is as high as 20%, minimum reflection loss can reach −51.22 dB with effective loss of < –10 dB and effective bandwidth of 6.24 GHz even at a thin thickness of 1.45 mm. It is highly believed that these significant achievements will arouse interest from researchers for further practical exploration of microwave absorbers.