Flexible Fe₃Si/SiC ultrathin hybrid fiber mats with designable microwave absorption performance

Abstract

Flexible Fe3Si/SiC ultrathin fiber mats have been fabricated by electrospinning and high temperature treatment (1400 °C) using polycarbosilane (PCS) and ferric acetylacetonate (Fe(acac)3) as precursors.

Microwave Absorption Performance of SiC/ZrC/SiZrOC Hybrid Nanofibers with Enhanced High-Temperature Oxidation Resistance

“…In practical applications, the microwave-absorbing performances of an absorbent are mainly evaluated through two aspects. One aspect is the ability of electromagnetic wave dissipation, and the other aspect is the degree of impedance matching . Although a high ε r indicates a high dielectric loss ability, if the ε r is too high, it leads to an impedance mismatch between free space and the material surface.…”

“…One aspect is the ability of electromagnetic wave dissipation, and the other aspect is the degree of impedance matching. 61 Although a high ε r indicates a high dielectric loss ability, if the ε r is too high, it leads to an impedance mismatch between free space and the material surface. To study the wave-absorbing properties of the SiC/ZrC/SiZrOC hybrid nanofibers, the RL values were calculated using μ r and ε r by transmission line theory, as described in eqs 3 and 4 62…”

Flexible Ceramic Fibers: Recent Development in Preparation and Application

“…Polymer conversion is a method for preparing high temperature resistant FCFs from polymers containing silicon (Si), carbon (C), nitrogen (N) and other elements [133]. The polymer precursors are first processed into fibrous materials by fiber processing methods, such as electrospinning, solution Polymer conversion method is often used to prepare non-oxide ceramic fiber materials, and SiC fiber is the most studied [72,73,76,[134][135][136][137][138][139][140]. Hou et al [134][135][136][137]139] developed SiC fibers and a series of modified SiC fibers by electrospinning combined with polymer precursor conversion: First, the spinning solutions containing polymers, ceramic precursors and other ingredients such as modifiers are prepared, then the composite fibers are prepared by electrospinning process, and eventually the SiC fibers or modified SiC fibers are obtained by thermal curing and pyrolysis (Fig.…”

Most recent developments in electrospun magnetic nanofibers: A review

“…85 Fe 3 O 4 /PVP nanofibers showed good electromagnetic shielding for the frequency range between 8.2 and 12.4 GHz. 86 Using polycarbosilane and ferric acetylacetonate as precursors, Hou et al 87 88 found that by tailoring the mass ratio of soft and hard phases, the reflection loss and the bandwidth could be optimized for wide-band microwave absorption. A similar material was applied by Xiang et al 89 91 Similarly, Bayat et al 92 found the electromagnetic shielding properties of electrospun Fe 3 O 4 /C nanofibers related to the carbonization temperature and the magnetite nanoparticle diameter.…”

“…85 Fe 3 O 4 /PVP nanofibers showed good electromagnetic shielding for the frequency range between 8.2 and 12.4 GHz 86. Using polycarbosilane and ferric acetylacetonate as precursors, Hou et al87 prepared electrospun Fe 3 Si/SiC nanofibers which were found suitable for microwave absorption between 8.5 and 16.5 GHz. Mixing Ni 0.5 Zn 0.5…”