Dielectric loss and nonlinear resonance properties of zirconium boride (ZrB2) high-temperature ceramic

The developing of electrically conductive materials with extreme thermostability is of great importance in the field of microwaves absorption (MA). However, the dielectric loss of ZrB2 (a typical high-temperature and conducting ceramic) at microwave band still remains to be unexplored. In this paper, we systematically investigate the chemical structures, dielectric properties and MA performance of ZrB2 ceramic at microwave band. High MA performance can be achieved through the regulation of filler loading ratio of ZrB2, where the maximal absorption reaches −43.0 dB at 13.26 GHz at only 1.5 mm. A multi-polarization resonance loss is thought to be the main reason behind the excellent MA performance of ZrB2. This research opens up the exploration of high-temperature ceramic as MA materials.