Tailorable microwave absorption properties of macro-porous core@shell structured SiC@Ti3SiC2 via molten salt shielded synthesis (MS3) method in air

High-performance microwave absorption and lightweight design have evolved into the foremost critical considerations in the practical application of modern microwave absorbing materials. In view of this, macro-porous core-shell structured SiC@Ti3SiC2 were prepared through a facile molten salt shielded synthesis method in air. Distinctly, the minimum reflection loss (RL) value of SiC@Ti3SiC2 could reach - 68.59 dB at 9.76 GHz with the bandwidth of RL < -10 dB of 5.6 GHz when the absorber thickness is 2.3 mm. The synergistic mechanism of the multiple scattering, conductive loss, and significant polarization effects of macro-porous (average 53 nm) core-shell structured SiC compounded with nano-layered Ti3SiC2 (similar to 60 nm) is reviewed for the considerable improvement of electromagnetic wave absorption properties. This work provides a practical reference for the design and synthesis of high-performance Ti3SiC2-based microwave absorbers. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study presents the synthesis of high-performance microwave absorber SiC@Ti3SiC2 using a simple method. The material has a macro-porous core-shell structure, low reflection loss value, and wide bandwidth. The synergistic mechanism of macro-porous SiC and nano-layered Ti3SiC2 is reviewed for improving electromagnetic wave absorption properties.