Abstract
Microwave absorption (MA) materials with high heat resistance have a wide range of applications in many fields. In this work, a C,N-codoped MoSi2 ceramic was prepared via a facile solid-phase reaction method and its MA properties was investigated. On the one hand, the results indicate that this ceramic possesses excellent heat resistance and the weight of the MoSi2 is almost constant when the temperature is lower than 800°C. On the other hand, this ceramic shows good MA performance when the filler loading ratio increases to 30 vol%, the value of reflection loss (RL) could reach to −17.70 dB at 7.44 GHz with the thickness of 2.0 mm and the effective electromagnetic absorption bandwidth (RL below −10 dB) could reach to 1.88 GHz (9.28–11.16 GHz) with the thickness of 1.5 mm. Multi-polarization resonance loss is considered as the predominant attention mechanism on the MA performance of this MoSi2 ceramic. This research provides a new idea for understanding resonance mechanism and greatly expands the application scope of MoSi2 ceramic in MA area.
Highlights
We report the microwave absorption (MA) properties of a C,N-codoped MoSi2 ceramic, which was prepared from a solid-state reaction method [22]
The results indicate that C,N-codoped MoSi2 ceramic shows excellent heat resistance as well as good MA performance
C,N-codoped MoSi2 ceramic was prepared by solid-state reaction method
Summary
This article has been edited by the Royal Society of Chemistry, including the commissioning, peer review process and editorial aspects up to the point of acceptance. Electromagnetic radiation is harmful to human health, and to some sophisticated instruments. Many kinds of materials are confirmed to possess great MA performance, such as carbon materials [3,4,5], conductive polymers [6,7] and chiral materials [8]. On the one hand, temperature is one of the most important factors affecting dielectric properties [9,10,11]; these materials’ MA performance varies.
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