Abstract
The application of semiconductor materials was limited as electromagnetic absorption materials, due to the unstable absorption performance caused by the temperature sensitivity. In this work, a structurally controllable ceramic heterojunction was developed by assembling structural units of SiC nanowires (SiCnws) and Ba 0.75 Sr 0.25 Al 2 Si 2 O 8 (BSAS). Benefiting from the optimization of the energy gap and the construction of heterogeneous interfaces, the ceramic heterojunction can achieve stable electromagnetic absorption from room temperature to 600 °C, the effective absorption bandwidth is almost unchanged. And the minimum reflection loss value reached -63.6 dB at 600 °C. Meanwhile, the SiCnws/BSAS ceramic heterojunction shows stable electromagnetic absorption performance in various simulated outdoor environments, including acid rain, seawater, high temperature and water vapor corrosion. This result provides a fire-new idea to realize the environmental adaptability of electromagnetic absorption materials and largely broadens its application prospect.
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