Open AccessDielectric loss behavior and microwaves absorption properties of TiB2 ceramic
Author(s) -
Zhuoran Song,
Mengxiao Sun,
Lipeng Wu,
Fan Wu,
Aming Xie
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab85fb
Subject(s) - ceramic , materials science , dielectric , microwave , composite material , doping , polarization (electrochemistry) , dielectric loss , reflection loss , absorption (acoustics) , conductivity , optoelectronics , composite number , telecommunications , chemistry , computer science
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.