Fabrication and microwave absorbing property of WO3@WC with a core-shell porous structure

Special microstructure can significantly improve the microwave absorption property of rare materials. In this paper, porous WC powders were successfully synthesized by spray granulation method. Then, WO3@WC materials with core-shell porous structure can be prepared after 410 degrees C heating treatment at different time to form the outer WO 3 oxidation layer. In addition, the microstructure, morphology, phase analysis and electromagnetic property were fully studied by investigating the WC-based materials in different structures. For WO3@WC coreshell porous materials, when the coating thickness was 2.1 mm, the maximum reflection loss can reach -19.4 dB at 12.6 GHz, which shows quite good microwave absorbing effects. The core-shell porous structure enhances the original microwave absorption performance due to the multiple reflection reflections and polarizations.

Automated summary

In this paper, the authors successfully synthesized WO3@WC materials with core-shell porous structure and investigated their microstructure, morphology, phase analysis, and electromagnetic property. The experimental results demonstrated that the core-shell porous structure can significantly improve the microwave absorption property of the materials and exhibit good microwave absorbing effects.