Facile synthesis of a CNT@Fe@SiO₂ ternary composite with enhanced microwave absorption performance

Abstract

The CNTs@Fe@SiO2 ternary core-structure was prepared by a simple two-step approach consisting a pyrolysis process and then decomposition. At a thin thickness of 1.5 mm, the optimal reflection loss value of the ternary composite is as high as −14.2 dB.

Flexible composite film of aligned polyaniline grown on the surface of magnetic barium titanate/polyvinylidene fluoride for exceptional microwave absorption performance

“…This phenomenon can be explained by the 1/4 wavelength equation (t m ¼ nc/4f(3 r m r ) 1/2 ). 46 Hence, the absorption frequency range can be tuned by changing the thickness of the composites to satisfy practical application. For comparison, the microwave absorption performances of BaTiO 3 /PVDF and BaTiO 3 @Ni-P/PVDF are shown in Fig.…”

Preparation and characterization of CNT films/silicone rubber composite with improved microwave absorption performance

“…Because it has many merits like good elasticity with a large deformation [16,17], biocompatibility [18,19], acid/basic inertness [20] and excellent processability for molding [18,21]. Sufficient CNT contents are in favor of conductive loss with forming microcurrent networks, which has been proved in other CNT-containing absorbers [8,22]. It reports that even a 5 wt% CNT loading cannot help the RL values of CNT/SR absorber to reach the range of RL<−10 dB [23].…”

“…In response to this problem, exploring carbon nanotube (CNT)-based microwave absorbers (MAs) become a hot spot in this field. Because CNT is eligible to an ideal MAs with its natural material characteristics of low density, high electrical conductivity, and high specific surface area [8][9][10][11]. CNT plays a role as the conductive filler to adjust permittivity of CNT/polymer composite for satisfying the required bandwidth absorption such as X-band [10][11][12].…”

A Bean‐Like Formation of Germanium Nanoparticles Inside CNTs by the Subsequent Operation of Colloidal Synthesis and Catalytic Chemical Vapor Deposition Methods

“…Multiwall CNT‐based formation of magnetic/dielectric composite structure is an emerging field for many applications including enhancing microwave absorption properties of functional materials and nanodiodes . Such materials are also considered as a fundamental strengthening block onto the various surfaces where it is applied .…”