Abstract
In this work, a new concept of dynamic granular arrays was proposed based on magnetically controlled particles. Method of external rotating magnetic field (ERMF), based on a dipole interaction of magnetic spherical Fe3O4 particles in highly ordered volume arrays is proposed. The microwave-absorbing characteristics results of developed composites offer an effective way to design high-performance functional materials to facilitate the research in electromagnetic shielding and microwave absorption.
Highlights
Arising from the rapid development of electronic devices, wireless communication tools, and local area networks, electromagnetic interference (EMI) has greatly threatened human health and disturbed various commercial or industrial equipment [1−2]
Composite material obtained by this method has a small coercive force and a small residual magnetization, which affects the reflection spectra of the electromagnetic radiation
The magnetic susceptibility of the claimed composite material depends on the physical nature of the particles of the Fe3O4 material and on its geometric shape
Summary
Arising from the rapid development of electronic devices, wireless communication tools, and local area networks, electromagnetic interference (EMI) has greatly threatened human health and disturbed various commercial or industrial equipment [1−2]. The demand for electromagnetic absorbents has become urgent over the past years. The ideal absorbing materials must have light weight, strong absorption, thin thickness, and broad frequency. Several factors, such as morphology, geometry, and microstructure, are crucial in determining the electromagnetic absorption properties. A novel method was designed for porous 3D granular arrays fabrication based on magnetically controlled particles as a new type of microwave absorption materials. These well-defined structures consist of numerous air pores. On the basis of this principle, a technique is developed for the formation of dynamic flat and 3D particles arrays with a given packing structure
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