Crystal structure,infrared-reflectivity spectra,and microwave dielectric properties of novel Ce2(MoO4)2(Mo2O7) ceramics |
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| Affiliation: | 1. School of Environmental and Material Engineering, Yantai University, Yantai, 264005, Shandong, China;2. Colleges of Humanities of Yantai University, Yantai University, Yantai, 264005, Shandong, China;3. Engineering Technology Research Center of Preparation and Application of Industrial Ceramics of AnHui Province, Chaohu University, Chaohu, 238024, China;4. School of Materials Science and Engineering, University of Jinan, Jinan, 250022, Shandong, China |
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| Abstract: | Novel Ce2(MoO4)2(Mo2O7) (CMO) ceramics were prepared by a conventional solid-state method, and the microwave dielectric properties were investigated. X-ray diffraction results illustrated that pure Ce2(MoO4)2(Mo2O7) structure formed upon sintering at 600 °C-725 °C. [CeO7], [CeO8], [MoO4], and [MoO6] polyhedra were connected to form a three-dimensional structure of CMO ceramics. Analysis based on chemical bond theory indicated that the Mo–O bond critically affected the ceramics’ performance. Furthermore, infrared-reflectivity spectra analysis revealed that the primary polarisation contribution was from ionic polarisation. Notably, the optimum microwave dielectric properties of εr = 10.69, Q·f = 49,440 GHz (@ 9.29 GHz), and τf = −30.4 ppm/°C were obtained in CMO ceramics sintered at 700 °C. |
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| Keywords: | Chemical bond theory Infrared-reflectivity spectra Microwave dielectric ceramic |
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