Abstract
An ultralow-firing microwave dielectric ceramic Cu3Mo2O9 with orthorhombic structure has been fabricated via a solid-state reaction method. X-ray diffraction analysis, Rietveld refinement, Raman spectroscopy, energy-dispersive spectrometry, and scanning electron microscopy were employed to explore the phase purity, crystal structure, and microstructure. Pure and dense Cu3Mo2O9 ceramics could be obtained in the sintering temperature range from 580°C to 680°C. The sample sintered at 660°C for 4 h exhibited the highest relative density (∼ 97.2%) and best microwave dielectric properties with ε r = 7.2, Q × f = 19,300 GHz, and τ f = − 7.8 ppm/°C. Chemical compatibility with aluminum electrodes was also confirmed. All the results suggest that Cu3Mo2O9 ceramic is a promising candidate for use in ultralow-temperature cofired ceramic applications.
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Acknowledgements
This work was supported by the Natural Science Foundation of China (Nos. 21561008, 51502047, and 21761008), Natural Science Foundation of Guangxi Zhuang Autonomous Region (Nos. 2015GXNSFFA139003, 2016GXNSFBA380134, and 2016GXNSFAA380018), Project of Scientific Research and Technical Exploitation Program of Guilin (2016010702-2), Innovation Project of Guangxi Graduate Education (YCBZ2017052), and Project of Department of Science and Technology of Guangxi (2015AA07036).
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Wen, W., Li, C., Sun, Y. et al. Cu3Mo2O9: An Ultralow-Firing Microwave Dielectric Ceramic with Good Temperature Stability and Chemical Compatibility with Aluminum. J. Electron. Mater. 47, 1003–1008 (2018). https://doi.org/10.1007/s11664-017-5957-z
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DOI: https://doi.org/10.1007/s11664-017-5957-z