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- W1853367899 abstract "Low-density Fe-doped ordered mesoporous carbon (CMK-3)-silica (SBA-15) nanocomposites with different Fe contents have been prepared by a catalytic carbonization procedure followed by high-temperature calcination in N 2 . From field emission-scanning electron microscope (FE-SEM) and high resolution-transmission electron microscope (HR-TEM) images, it can be concluded that CMK-3 particles are dispersed homogeneously into a silica matrix and form a novel, special and interesting composite nanostructure. The metal species ([Formula: see text]18[Formula: see text]nm) are dispersed on the surface of frameworks during the catalytic carbonization procedure and endow a magnetic property to the carbon–silica nanocomposites. The optimal reflection loss (RL) calculated from the measured permittivity and permeability is [Formula: see text]19[Formula: see text]dB at 17.2[Formula: see text]GHz for an absorber thickness of 2.00[Formula: see text]mm. Moreover, the electromagnetic (EM) wave absorption less than [Formula: see text]10[Formula: see text]dB is found to exceed 5.76[Formula: see text]GHz as the layer thickness is 2.37 mm. The permittivity dispersion behaviors have been explained based on the Cole–Cole model and the conductivity contribution model. A new simple empirical model was also supposed to find the fitted curves of the multi-resonance imaginary permeability spectra of the composites. The EM wave can hardly be reflected on the absorber surface because of a better match between dielectric loss and magnetic loss, which originates from the combination of dielectric carbon–silica and magnetic Fe species." @default.
- W1853367899 created "2016-06-24" @default.
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- W1853367899 date "2015-11-23" @default.
- W1853367899 modified "2023-10-16" @default.
- W1853367899 title "Microwave Absorption Properties of Fe-Doped Ordered Mesoporous Carbon (CMK-3)/Silica Matrix Nanocomposites with Magnetic Multi-Resonance Mechanisms" @default.
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- W1853367899 doi "https://doi.org/10.1142/s1793292015501106" @default.
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