@article{WU2019, 
author = {Mengjuan WU and Yingchun ZHANG and Maoqiao XIANG},
title = {Synthesis, characterization and dielectric properties of a novel temperature stable (1-x)CoTiNb2O8-xZnNb2O6 ceramic},
year = {2019},
journal = {Journal of Advanced Ceramics},
volume = {8},
number = {2},
pages = {228-237},
keywords = {solid-state reaction, (1-x)CoTiNb2O8-xZnNb2O6 ceramics, crystal structure, microwave dielectric property},
url = {https://www.sciopen.com/article/10.1007/s40145-018-0308-y},
doi = {10.1007/s40145-018-0308-y},
abstract = {(1-x)CoTiNb2O8-xZnNb2O6 microwave dielectric ceramics were prepared via the conventional solid-state reaction route with the aim of reducing the τf value and improving the thermal stability. The phase composition and the microstructure were investigated using X-ray diffraction, Raman spectra, and scanning electron microscopy. A set of phase transitions which were induced by composition had been confirmed via the sequence: rutile structure→coexistence of rutile and columbite phase→columbite phase. For (1-x)CoTiNb2O8-xZnNb2O6 microwave dielectric ceramics, the addition of ZnNb2O6 content (x = 0-1) led to the decrease of εr from 62.98 to 23.94. As a result of the high Q × ƒ of ZnNb2O6 ceramics, the increase of ZnNb2O6 content also led to the lower sintering temperatures and the higher Q × ƒ values. The τf value was reduced from +108.04 (x = 0) to - 49.31 ppm/℃ (x = 1). Among them, high density 0.5CoTiNb2O8-0.5ZnNb2O6 ceramics were obtained at 1175 ℃ with excellent microwave dielectric properties of εr 39.2, Q × ƒ 40013 GHz, and τf + 3.57 ppm/℃.}
}