Recent Progresses of High-Temperature Microwave-Absorbing Materials

Generally, certain parts of aircraft and weapons, for example, head cone, engine inlet and nozzle, need to be resistant to high-temperature and high-speed heat flow. In order to meet the requirement of stealth of these special parts, the high-temperature structural absorbing materials, for example, ceramic fibers, ceramic matrix composites and creative commons (C/C) materials are being actively developed at home and abroad. Continuous and increasing efforts have also been made in the last decade aiming at developing excellent electromagnetic (EM) wave absorbents, for example, SiC working at high temperature. An ideal EM absorber should be relatively lightweight, thermally stable, capable of broad absorbing frequency and cost effective. Different kinds of high-temperature absorbers including ceramics, carbon-based materials, ferromagnetic materials and metal oxides have been summarized and discussed in this review. This review intends to inspire new concepts and approaches for designing excellent high-temperature microwave-absorbing materials.