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Structural and dielectric properties of (Na0.5Bi0.5)0.70Ba0.30TiO3 ceramics
Affiliation:1. Institute of Physics, Pedagogical Academy, ul.Podchorazych 2, 30-084 Krakow, Poland;2. Institute of Physics, University of Silesia, ul.Uniwersytecka 4, 40-007 Katowice, Poland;3. Institut fur Geowissenschaften, Johannes Gutenberg Universitat, D-55099 Mainz, Germany;4. Faculte des Sciences, Universite de Limoges, 123, Av.Albert Thomas, 7060 Limoges Cedex, France;1. C.A.S.C.O., IRCCS Istituto Ortopedico Galeazzi, Milan, Italy;2. Universita’ degli Studi di Milano, Italy;3. Clinical Research Department, Zimmer Biomet, Winterthur, Switzerland;4. Orthopaedic and Traumatolgy Division, University “G. d’Annunzio”, Chieti-Pescara, Italy;1. Department of Mechanical Engineering, Jönköping University, SE-55111 Jönköping, Sweden;2. Department of Mathematics and Mathematical Statistics, Umeå University, SE-90187 Umeå, Sweden;1. University of Information Technology and Management, Faculty of Applied Computer Science, ul. Sucharskiego 2, 35-225 Rzeszów, Poland;2. AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059 Kraków, Poland;3. Jagiellonian University, Faculty of Physics, Astronomy and Applied Computer Science, ul. ?ojasiewicza 11, 30-348 Kraków, Poland;4. Pedagogical University of Cracow, Institute of Technology, Kraków, Poland;1. Department of Arrhythmology, IRCCS Policlinico San Donato, San Donato Milanese, Milán, Italia;2. Servicio de Cardiología, Instituto Cardiovascular, Hospital Clínic e IDIBAPS, Universidad de Barcelona, Barcelona, España;1. Facultad de Ingeniería, Universidad Nacional del Comahue, Buenos Aires 1400, 8300 Neuquén, Argentina;2. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas – CONICET-UNCo, Argentina;3. Grupo de Nuevos Materiales, Universidad de la Guajira, Riohacha, Colombia;4. CONICET - Instituto Balseiro, Centro Atómico Bariloche, Avda. Bustillo 9500, 8400 Bariloche, Argentina
Abstract:A (Na0.5Bi0.5)0.70Ba0.30TiO3 ceramic has been studied by X-ray diffraction and by measurements of dielectric and ferroelectric properties between room temperature and 450 °C. A sharp increase in the electric permittivity and dielectric loss near 200 °C has been observed. This sharp increase in dielectric responses indicates a transformation between normal and relaxor ferroelectric states. It is found that polar regions can exist at higher temperatures. The X-ray diffraction study shows that the transformation corresponds to the first order phase transition from tetragonal to cubic. The use of the (Na0.5Bi0.5)0.70Ba0.30TiO3 ceramic for device application has also been indicated.
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