Raman spectra,bond characteristics,and microwave dielectric properties of Gd2Mo3O12 ceramics |
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| Affiliation: | 1. Provincial Key Laboratory of Informational Service for Rural Area of Southwestern Hunan, Shaoyang University, Shaoyang 422000, China;2. College of Information Engineering, Shaoyang University, Shaoyang 422000, China;1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Tianjin Dagang Oilfield Shengda Technology Company Limited 300280, China;3. Mianyang Westmag Technology Corporation Limited 621000, China;1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China;2. Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China;1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;2. School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China;3. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;4. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China;1. School of Advanced Materials and Nanotechnology, Xidian University, Xi’an, 710071, PR China;2. Academy of Advanced Interdisciplinary Research, Xidian University, Xi’an, 710071, PR China;3. Songshan Lake Materials Laboratory A1 Building, University Innovation Park, Dongguan, 523808, PR China;4. Yunnan Precious Metals Lab Co, LTD, Kunming, 650106, PR China;1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;2. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | Gd2Mo3O12 ceramics were prepared using the traditional solid-phase reaction method. All samples were found to possess an orthorhombic crystal structure with a space group of Pba2, as revealed by refined XRD results. The ceramic sintered at 1000 °C exhibited a high relative density of 96.95 % and superior microwave dielectric properties, including εr of 9.42 ± 0.05, × f of 49258 ± 1200 GHz, and τf of −71.8 ± 0.7 ppm/°C. The results suggest a correlation between an increase in εr and higher relative density, and a more compact and uniform microstructure can lead to higher × f value. Chemical bonding theories and Raman spectroscopy analysis reveal that Mo-O bonds, rather than Gd-O bonds, dominate the microwave dielectric properties. Furthermore, the εr of Gd2Mo3O12 ceramic was closely related to bond ionicity, while × f and τf were mainly determined by lattice energy and bond energy, respectively. |
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| Keywords: | Microwave dielectric properties Raman spectra Rietveld refinement P-V-L theory |
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