Dielectric loss behavior and microwaves absorption properties of TiB<sub>2</sub> ceramic
Zhuoran Song, Mengxiao Sun, Lipeng Wu, Fan Wu, Aming Xie
Abstract
Abstract Searching for microwaves absorption (MA) with outstanding resistance to harsh condition shows great potential in various special applications. As a typical high-temperature and conducting ceramic, TiB 2 can meet this requirement, but its high electrical conductivity will lead to high reflection of electromagnetic waves. In this paper, we find that TiB 2 ceramic can exhibit excellent MA performance after doping by C/N elements. The chemical structures, dielectric properties and MA performance of ZrB 2 ceramic are systematically measured and analyzed. The MA performance of TiB 2 ceramic reaches −21 dB at 8.00 GHz under a thickness of 2 mm. The results indicate that the MA performance of ZrB 2 can be ascribed to the multiple nonlinear dielectric resonance and polarization relaxation mechanism. This research significantly expands the application scope of TiB 2 ceramic to MA area.