Abstract
We fabricated a ZrO2/Al2O3 ceramic using the 3D plasma spraying technology, and the surface morphology and electrical properties of the prepared ceramic were investigated. The microwave-absorbing performance of the ceramic was studied based on the measured electrical properties. Furthermore, a radar-absorbing structure (RAS) was designed based on the fabricated ZrO2/Al2O3 ceramic with a K0.5Na0.5NbO3 (KNN) film heterojunction. The relationship between the structural parameters of the RAS and the microwave performance was explored. The changes in the absorption performance and band structure of the RAS with the resistance of the KNN film were investigated. The analytical results showed that the structural parameters of the KNN film can facilitate the absorption intensity as well as the bandwidth of the RAS while inducing electromagnetic coupling in the RAS system. The improvement in the absorption performance could be attributed to the resonance coupling between the ZrO2/Al2O3 ceramic and the KNN film.
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