Controllable synthesis of FeO-based magneto-dielectric ternary nanocomposites and their enhanced microwave absorption properties.

In order to overcome the drawbacks of FeO composite samples and greatly increase their performance in microwave absorption, magnetic FeO spindles coated with dielectric SnO nanorods and MnO nanoflakes have been successfully synthesized by a four-step simple hydrothermal route. This rationally designed magneto-dielectric ternary nanocomposite will introduce multiple reflection and conductive losses caused by its special multilayer structure and the effective complementarity of dielectric loss and magnetic loss. Therefore, its absorbing performance can be greatly improved.

A biomass derived porous carbon for broadband and lightweight microwave absorption.

With the continuous progress of science and technology, the traditional magnetic material is no longer able to meet the new complex electromagnetic (EM) environment due to its high bulk density. Therefore, the novel excellent EM absorber with the feature of thin thickness, low density, broad absorption bandwidth and strong absorption intensity is highly desired. Herein, we fabricated a porous carbon with ultrahigh porosity through a facile KOH activation from biomass waste pumpkin seed shell for lightweight EM wave absorption application.

Biomass-Derived Porous Carbon-Based Nanostructures for Microwave Absorption.

Currently, electromagnetic (EM) pollution poses severe complication toward the operation of electronic devices and biological systems. To this end, it is pertinent to develop novel microwave absorbers through compositional and structural design. Porous carbon (PC) materials demonstrate great potential in EM wave absorption due to their ultralow density, large surface area, and excellent dielectric loss ability.

Investigation and optimization of Fe/ZnFeO as a Wide-band electromagnetic absorber.

In this research, a facile in-situ growth method was applied to load ZnFeO nanoparticles on carbonyl iron (Fe) flakes. These loaded ZnFeO exhibited cone shape with an average size of ∼200 nm. The results revealed that the frequency region with reflection loss <-10 dB (f) was up to 6.