Low loss microwave ferroelectric ceramics for high power tunable devices |
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| Authors: | E.A. Nenasheva N.F. Kartenko I.M. Gaidamaka O.N. Trubitsyna S.S. Redozubov A.I. Dedyk A.D. Kanareykin |
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| Affiliation: | 1. GIRICОND Research Institute, 10, Kurchatova St., Saint-Petersburg, 194223, Russia;2. A.F.Iоffe Physicоtechnical Institute Russian Academy of Sciences, 26, Politechnicheskaya St., Saint-Petersburg, 194021, Russia;3. St. Petersburg State Mining Institute, 2, 21st Line, Saint-Petersburg, 199106, Russia;4. Ceramics Co.Ltd, 10, Kurchatova St., Saint-Petersburg, 194223, Russia;5. Electrotechnical University, 5, Popova St., Saint-Petersburg, 197356, Russia;6. Euclid Techlabs LLC, Solon, OH 44139, USA;1. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China;2. Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;3. Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China;4. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310006, China;1. Université Paris-Saclay, CEA-Saclay, DRF/I2BM/Neurospin/UNIRS, 91191 Gif-sur-Yvette Cedex, France;2. Université Paris-Saclay, CEA-Saclay, DRF/IRFU/SACM, 91191 Gif-sur-Yvette Cedex, France;3. Siemens Healthcare, 93210 Saint-Denis, France;4. Aix Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249, 13013 Marseille, France;1. Department of Physics and Engineering, ITMO University, Saint Petersburg, Russia;2. Institut Langevin, ESPCI Paris, CNRS, PSL University, Paris, France;3. Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany;4. Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of the Moscow Health Care Department, Moscow, Russia |
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| Abstract: | In this paper we report the influence of the composition and concentration of Mg-containing additions such as Mg2TiO4, MgO and a mixture of Mg2TiO4–MgO on ceramics based on a mixture of BaTiO3/SrTiO3. Phase relations, crystal structure, microstructures, microwave dielectric properties (?, tan δ) and DC tunability have been studied over a wide range of frequencies. The temperature dependence of the dielectric properties has been measured as well. Among the compositions synthesized were low loss bulk ferroelectrics with dielectric constants in the range 150–800 and relatively high DC tunabilities (up to 1.49 under a DC electric field of 40 kV/cm). These materials can be used for high power tunable microwave devices. |
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