Synthesis mechanism and microwave dielectric properties of Colus-plus">0.5Tilus-plus">0.5NbOlus-plus">4 ceramics
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- 作者：Yaoyao Li ; Yan Zhang ; Xiaochi Lu ; Yanyan Zou…
- 刊名：Journal of Materials Science: Materials in Electronics
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：28
- 期：4
- 页码：3380-3385
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials;
- 出版者：Springer US
- ISSN：1573-482X
- 卷排序：28
文摘
Co0.5Ti0.5NbO4 (CTN) microwave dielectric ceramics with low loss were prepared by the conventional solid-state method. The process of phase formation was investigated by X-ray diffraction, it was found that the structure transformed from orthogonal phase to tetragonal phase along with the increasing of temperature from 800 to 1080 °C. Only when temperature was over 1080 °C, the pure CTN phase could be synthesized. However, high calcining temperature would lead to inadequate driving force of sintering. The influences of calcining temperature on the microstructure, densities and microwave dielectric properties were discussed systematically. Calcining at 800 °C for 3 h could achieve optimal microwave dielectric properties in CTN ceramics, permittivity for 64.7, quality factor (\({\text{Q}} \times f\)) for 12,141 GHz and the temperature coefficient of resonant frequency (τf) for 202 ppm/°C. The lower sintering temperature and excellent microwave dielectric properties would make CTN ceramics become a potential material for microwave applications via tailoring high τf.