Effect of Sr2+doping on the microwave dielectric properties of BaZrO3 ceramics

ABSTRACTIn this study, undoped and Sr2+ doped BaZrO3 ceramics were prepared by solid-state reaction using 3 wt-% B2O3 as sintering aid. The phase composition and microstructure of BaZrO3 were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that introducing an appropriate amount of Sr2+ makes BaZrO3 ceramics Q × f value and density increase. In addition, the dielectric constant of BaZrO3 ceramics increases with the increase of Sr2+ addition. With excellent microwave dielectric properties, ϵr = 34.17 and Q × f value of 39,070 GHz(@ 7.8 GHz) τf = + 140 ppm/°C were obtained in 6 at.-% Sr2+ doped BaZrO3 with 3 wt-% B2O3 sintering aid at 1275°C for 5 h. Using this material as the medium, the simulation of GPS antenna by HFSS software shows that this material has the potential to be used as the antenna medium material.KEYWORDS: Microwave dielectric ceramicsantennabarium zirconate Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by Key Laboratory of Inorganic Functional Materials and Devices [grant number KLIFMD202301].