Effects of sintering parameters and Nd doping on the microwave dielectric properties of Y2O3 ceramics |
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| Affiliation: | 1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Key Lab of Functional Materials for Electronic Information, MOE, Huazhong University of Science and Technology, Wuhan 430074, PR China;1. Laboratoire de Mathématiques et de leurs Applications, CNRS-UMR 5142, Université de Pau, Av. de l’Université, 64000 Pau, France;2. Laboratory of Fluid Dynamics and Seismics, Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region, 141700, Russian Federation;1. National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Jianshe Road, Chengdu, 610054, People''s Republic of China;2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Jianshe Road, Chengdu, 610054, People''s Republic of China;1. College of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;1. State Key Laboratory Breeding Base of Nonferrous Metals and Specific Materials Processing, Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China;2. Guangxi Key Laboratory of New Energy and Building Energy Saving, Guilin University of Technology, Guilin 541004, China;3. College of Information Science and Engineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | Y2O3 ceramics with good dielectric properties were prepared via co-precipitation reaction and subsequent sintering in a muffle furnace. The effects of Nd doping and sintering temperature on microwave dielectric properties were studied. With the increase in sintering temperature, the density, quality factor (Q×f), and dielectric constant (εr) values of pure Y2O3 ceramics increased to the maximum and then gradually decreased. The Y2O3 ceramics sintered at 1500 °C for 4 h showed optimal dielectric properties: εr=10.76, Q×f=82, 188 GHz, and τf=−54.4 ppm/°C. With the addition of Nd dopant, the Q×f values, εr, and τf of the Nd: Y2O3 ceramics apparently increased, but excessive amount degraded the quality factor. The Y2O3 ceramics with 2 at% Nd2O3 sintered at 1460 °C displayed good microwave dielectric properties: εr=10.4, Q×f=94, 149 GHz and τf=−46.2 ppm/°C. |
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| Keywords: | Sintering temperature Microstructure Microwave dielectric properties |
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