Multi-interfacial 1D magnetic ferrite@C fibers for broadband microwave absorption

• Published in: Materials today physics 2023-06, Vol.35, p.101140, Article 101140
• Main Authors: Wang, Xiangyu, Lv, Xiaowei, Liu, Zhengwang, Zhang, Huibin, Liu, Minmin, Xu, Chunyang, Zhou, Xiaodi, Yuan, Mingyue, Yang, Liting, You, Wenbin, Wu, Limin, Liang, Chongyun, Lv, Hualiang, Zhang, Jincang, Che, Renchao
• Format: Article
• Language: English
• Subjects: Broadband microwave absorption; MnZn Ferrite; Multiple interfaces; One-dimension
• ISSN: 2542-5293; 2542-5293
• DOI: 10.1016/j.mtphys.2023.101140

As a classical magnetic material, spinel ferrite materials have been widely studied in the field of microwave absorption. However, due to their low conductivity and uncontrollable self-aggregation, their practical application has been greatly constrained. Now, a novel multi-interfacial one-dimensional (1D) magnetic ferrite@C fibers composites were synthesized by a facile electrospinning and annealing process. Through effective structural design and component adjustment, Zn-based ferrites were successfully confined into 1D carbon fibers. This structure brings about a large number of heterogeneous interfaces, while avoiding magnetic aggregation. Impressively, the results indicate that as-prepared ferrite@C fibers exhibit excellent EM absorption properties. The minimum reflection loss can reach up to −47.42 dB at 13.52 GHz with a matching thickness of 2.5 mm. In the meantime, a super-wide effective absorption bandwidth of 9.28 GHz (8.24–17.52 GHz) is obtained at 3.3 mm, which almost concurrently achieves coverage for X and Ku-bands. This study provides a feasible path to design novel and efficient magnetic ferrite/dielectric absorbers. [Display omitted] •Zn-based ferrites were successfully confined in 1D carbon fibers to increase their magnetic anisotropy and reduce self-aggregation.•The 1D MnZn ferrite@C fibers exhibits high-performance EM absorption, the effective EM wave absorption bandwidth shows endearing 9.28 GHz (8.24–17.52 GHz).•The work confirms that the polarization generated by multiple interfaces is the crucial mechanism for EM wave loss capacity.