Recent advances of magnetism-based microwave absorbing composites: an insight from perspective of typical morphologies
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Recent advances of magnetism-based microwave absorbing composites: an insight from perspective of typical morphologies Haitao Bai1, Pengfei Yin1,* , Xu Lu2, Limin Zhang3, Wenjuan Wu1, Xing Feng1, Jian Wang1, and Jianwu Dai4 1
College of Science, Sichuan Agricultural University, Ya’an 625014, People’s Republic of China School of Art and Science, Shaanxi University of Science and Technology, Xi’an 710021, People’s Republic of China 3 School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an 710072, People’s Republic of China 4 College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya’an 625014, People’s Republic of China 2
Received: 3 October 2020
ABSTRACT
Accepted: 9 November 2020
Due to the fast development of various wireless devices and radar detection technology, the microwave absorbing composites have been developed to solve the problem of electromagnetic pollution and radar stealth by transferring microwave energy into thermal energy. Given that, the morphology is a key factor which can influence the absorbing performance of absorbers to a large extent. Recently, abundant investigations on fabrication of microwave absorbers with miraculous morphologies and microstructures have been reported. This review aims at summarizing the recent progress of magnetism-based microwave absorbing composites from perspective of several typical morphologies, including core-shell structure, layered structure, porous structure, polyhedral structure, flower-like structure and coral/needle-like structure etc. Firstly, the influential factors of electromagnetic absorption ability in materials and their relationship with morphology have been introduced briefly, then the synthesis methods, microwave absorption properties, and electromagnetic absorbing mechanisms of these composites in each morphology are discussed in detail. Moreover, the promising prospects of magnetism-based microwave absorbing composites with different morphologies are also proposed.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Haitao Bai and Pengfei Yin contributed equally.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10854-020-04857-8
J Mater Sci: Mater Electron
1 Introduction Since the rapid development of electromagnetic (EM) technology, the electromagnetic pollution produces many severe problems to our environment [1–3]. It not only causes a lot of troubles in human health, but also influences the performance of precise electronic equipment [4–6]. Therefore, microwave absorbing materials (MAMs) are developed to absorb the incident EM wave effectively by transferring it into thermal energy via dielectric loss, magnetic loss and resistance loss etc [7, 8], which proposes the demand of MAMs with thin thickness, strong absorbing performance, broad bandwidth, light weight, and low cost [9–11]. In general, microwave absorbing materials can be classified into magnetic loss materials e.g., magnetic alloys, ferrites, magnetic metal oxide
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