Preparation of hierarchical MoS₂ microsphere/BN composites for microwave absorption and thermal management

Abstract

The increase in the utilization of infrared heat detection technology in military applications necessitates research on composites with improved thermal transmission performance and microwave absorption capabilities. This study satisfactorily fabricated a series of MoS₂/BN-xyz composites (which were characterized by the weight ratio of MoS₂ to BN, denoted by xy:z) through chemical vapor deposition, which resulted in their improved thermal stability and thermal transmission performance. The results show that the remaining mass of MoS₂/BN-101 was as high as 69.25wt% at 800°C under air atmosphere, and a temperature difference of 31.7°C was maintained between the surface temperature and the heating source at a heating temperature of 200°C. Furthermore, MoS₂/BN-301 exhibited an impressive minimum reflection loss value of −32.21 dB at 4.0 mm and a wide effective attenuation bandwidth ranging from 9.32 to 18.00 GHz (8.68 GHz). Therefore, these simplified synthesized MoS₂/BN-xyz composites demonstrate great potential as highly efficient contenders for the enhancement of microwave absorption performance and thermal conductance.

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