含频率选择表面耐高温吸波涂层的高温吸波性能

Due to its adjustable surface impedance, the high-temperature-resistant resistance material has some excellent properties such as co-reflection, loss characteristics, and broadband. The frequency selective surface absorbing coatings were prepared by brush coating method in this paper. The composition, microstructure of the coatings, and high temperature stability of the square resistance were characterized by SEM and square resistance tester. The effects of coating heat treatment temperature and holding time on the reflectivity of absorbing materials were also studied by vector network analyzer. The results show that, after long time heat treatment at 600 ℃, the surface morphology of the ceramic coating has little change, the surface square resistance is stable, and the high temperature resistance is good. Such results suggest that the frequency selective surface has an important significance on preparing a new generation of absorbing coatings with broadband and high temperature resistance.