Microstructure, phase evolution and interfacial effects in a new Zn0.9Mg0.1TiO3-ZnNb2O6 ceramic system with greatly induced improvement in microwave dielectric properties

Publication date: 15 March 2018
Source:Scripta Materialia, Volume 146
Author(s): Shenhui Lei, Huiqing Fan, Xiaohu Ren, Jiawen Fang, Longtao Ma, Hailin Tian
Zn0.9Mg0.1TiO3-ZnNb2O6 (ZMT-ZN) ceramics was synthesized and characterized successfully for the first time, and phase conversion to secondary phases was largely restrained due to the introduction of ZnO nano inhibitors. Excellent microwave dielectric properties and optimal combination were achieved for the ceramics sintered at 1100°C, i.e., εr=27.5, Q×f=75,000GHz, τf=−3.8ppm/°C. Particularly, the comparatively insulated interlayers were considered as the key mechanism to impede transportation or transfer of defects and surface polarization charges. Considering the merits of facile, low cost and simple process, this series of ZMT-ZN ceramics are promising new candidates for ultra-low microwave devices.

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