Magnetic TiN composites for efficient microwave absorption: Nanoribbons vs nanoparticles

The rational structure-effect relationship design of microwave absorption devices provides tremendous potential for the elimination of electromagnetic radiation contamination. Here, we report on the efficient microwave absorbers (MA) consisting of TiN/Fe2Ni2N nanoribbons (NRs) and nanoparticles (NPs) as a functional MA filler. The cross-linked network and multiple heterogeneous interface polarization of TiN/Fe2Ni2N NRs contributes to improved conductance loss and polarization loss and is favorable for obtaining the lightweight MA absorber at a low filler content of 15 wt%. As a comparison, due to the enhanced permeability and balanced permittivity, the maximum reflection loss of the NPs filled absorber can reach -31.9 dB at a filler thickness of 1.3 mm at a high filler content of 50 wt%. This work deepens the understanding for designing the high-performance MA through tuning and optimizing the dielectric and magnetic loss.

Automated summary

The study introduces efficient microwave absorbers consisting of TiN/Fe2Ni2N nanoribbons and nanoparticles, which improve performance by tuning and optimizing dielectric and magnetic loss. The absorber achieves lightweight at low filler content and improves reflection loss at high filler content.