Research progress in high temperature microwave absorbing ceramics and coatings

Abstract

With the development of modern science and technology, the demand for survivability of high-speed aircraft is constantly increasing. Its nose cone, wing, tail nozzle and other high-temperature components are easily exposed. In order to hide the high temperature parts of high-speed aircraft, the high temperature application of wave absorbing materials has attracted the attention of researchers. High temperature absorbing ceramic materials can realize the application in the above background. In order to provide the basis for analyzing and improving the problems of limited high temperature degree and narrow absorption bandwidth of ceramic absorbing materials, the absorbing mechanism of ceramic absorbing materials with high temperature resistance was described with the influence of temperature. The high temperature absorbing ceramic materials and coatings can be classified into carbide ceramics, nitride ceramics, oxide ceramics and polymer conversion ceramics. Based on this classification, the electromagnetic wave loss mechanism of ceramic absorbing materials and coatings, and their absorbing properties under high temperature conditions were summarized in this paper.In addition, it is pointed out that the future high temperature absorbing ceramic materials should improve the existing materials' low high temperature resistance and narrow effective absorption band width so as to strengthen its service ability.

Keywords

• ceramics
• composite material
• dielectric loss
• high-temperature microwave absorbing coating