Correlation between the microstructure and the electromagnetic properties of carbonyl iron filled polymer composites

Evolution of double magnetic resonance behavior and electromagnetic properties of flake carbonyl iron and multi-walled carbon nanotubes filled epoxy-silicone

“…By using multi-layer absorber design, wideband absorption microwave absorber can be obtained by optimizing the impedance matching characteristic and the attenuation characteristic of the absorber. A suitable matching layer, which can achieve a good impedance matching with the free space and allow an 11 incident EM waves enter into the absorbing layer, is often employed for design multi-layer microwave absorber with a good absorption performance. A higher absorption layer is also often employed for design microwave absorber, which possess higher magnetic and/or dielectric loss and greater ability of dissipate an incident EM wave into heat.…”

“…Electromagnetic (EM) waves absorbing materials in the frequency range of [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] GHz are important for both commercial and military applications, for example, protect the electronic devices and components, reduce the RCS for stealth systems [1,2]. It is also well known that the absorption of EM waves was worked by dissipating the EM energy into heat via magnetic and/or dielectric losses.…”

“…Most of the prior works have been concerned with the EM properties and microwave absorption of the CNTs filled composites by changing the structure and content of the CNTs [7][8][9]. Recent studies have shown that carbonyl iron (CI) particles filled composites possess high real (μ′) and imaginary (μ′′) part of complex permeability in the frequency range of 2-18GHz, indicating that such composites could be used as the EM waves absorbing material [10][11][12][13]. Recently, EM wave absorbing materials fabricated by multi-walled carbon nanotubes (MWCNTs)/magnetic particles composites have been intensively investigated [14][15][16].…”

Preparation of magnetic polymer particles with nanoparticles of Fe(0)

“…Iron (Fe 0 ) particles with a average diameter of particle of 66 nm determinated by dynamic light scattering, were encapsulated into polymethyl methacrylate by means of emulsion polymerization techniques in a semicontinuous process. The polymerization reaction was made in presence of a surfactant because this kind of material has a tendency to aggregate, showing poor dispersion behavior when introduced into various polymer matrices [36]. The number of iron particles was kept constant in the system.…”

Novel aluminum phosphate/cyanate ester composites: Thermodegradation behaviors and kinetic analyses

“…[1][2][3] It is well known that the matrix is the basic and important component of a composite, and many important properties of a composite such as thermal resistance, dielectric property, and interlaminate shear strength as well as processing characteristics are closely dependent on the properties of the matrix. 4,5 Cyanate ester (CE) resin is one of typical high performance resins for advanced composites, which has excellent dielectric properties, outstanding thermal, and mechanical properties as well as good processing characteristics, and thus has been considered as the most potential matrix for fabricating advanced structural/functional composites.…”