Aligning flaky FeSiAl particles with a two-dimensional rotating magnetic field to improve microwave-absorbing and shielding properties of composites

Magnetically driven hierarchically ordered carbonyl iron@SiO2/Ni@Ag/silicone rubber composite film for enhanced electromagnetic interference shielding with ultralow reflection

“…This was due to the fact that the alignment would increase the electronic polarization of the CS microparticles. 28 Therefore, the complex permittivity and dielectric loss of the CS samples were significantly enhanced. In particular, the CS-3 sample had a larger e 00 among the CS samples, which should be attributed to the strong interface polarization introduced by the SiO 2 layers.…”

“…, TPU, PDMS, epoxy resin), magnetic alignment-based highly ordered SRMs have not been reported to the best of our knowledge. 27–29 In this work, magnetic alignment of EM microparticles was utilized to construct multi-layer, highly flexible, adsorption-dominated SRMs. In general, good magnetism is a prerequisite for microparticles to serve as EMW absorbers, such as ferrites ( e.g.…”

“…26 Despite the development of constructing aligned EMI shielding composites in low-viscosity matrixes (e.g., TPU, PDMS, epoxy resin), magnetic alignment-based highly ordered SRMs have not been reported to the best of our knowledge. [27][28][29] In this work, magnetic alignment of EM microparticles was utilized to construct multi-layer, highly flexible, adsorption-dominated SRMs. In general, good magnetism is a prerequisite for microparticles to serve as EMW absorbers, such as ferrites (e.g., CoFe 2 O 4 , Fe 3 O 4 ), 30,31 carbonyl iron (CI), 32 and metals (e.g., Fe, Co, Ni).…”

Highly Stretchable Electromagnetic Interference Shielding Materials Made with Conductive Microcoils Confined to a Honeycomb Structure

“…In recent years, the increasing number electronics applications of wireless communication and microwave devices has made available a tremendous number of conveniences to humanity. , Meanwhile, electromagnetic (EM) waves emitted by these applications also threaten human health. − In addition, in terms of packaging electronic devices, EM waves may interfere with other sensitive devices and cause malfunctions . To solve this problem, using electromagnetic interference (EMI) shielding materials is a convenient and efficient method. − Currently, various EMI shielding materials have been developed, such as sheet/film types, , foam types, , and coating types, , which have been proven to be effective for conventional EMI shielding.…”

Synthesis of absorbing coating based on magnetorheological gel with controllable electromagnetic wave absorption properties

“…These devices generally operate at gigahertz (GHz) range [7,8]. There is no doubt that excessive electromagnetic (EM) wave generated from these electronic devices bring electromagnetic radiation that has greatly threatened human health and disturbed various commercial or industrial equipment [9][10][11][12][13][14]. Worse yet, electronic equipment work in various frequency bands and radar detection technology has also been greatly upgraded, so electromagnetic environment (military and civilian) is becoming more and more complicated [8].…”