Mgbemere, Henry EkeneHenry EkeneMgbemerePacher Fernandes, RodrigoRodrigoPacher FernandesSchneider, Gerold A.Gerold A.Schneider2020-05-112020-05-112013-06-14Journal of the European Ceramic Society 15-16 (33): 3015-3022 (2013)http://hdl.handle.net/11420/6105The crystal structure, domain structure and the electrical properties of 0.85(Bi0.5Na0.5)TiO3-0.12BaTiO3-0.03SrTiO3 ceramics have been investigated. Rietveld refinement with Fullprof software was used to analyze the X-ray diffraction data and a two-phase coexistence between a monoclinic (Cm) phase and a tetragonal phase (P4mm) best describes the diffraction patterns from 25°C to 100°C. Results from X-ray diffraction and dielectric measurements show that the Curie temperature is between 220°C and 240°C. The domain structure shows the presence of both non-180° domain walls and 180° domain walls similar to that already observed in Pb(ZrxT1-x)O3 ceramics. The hysteresis curves show that the coercive field decreases with increasing temperature up to 100°C. The piezoelectric charge coefficient (d33*) at 25°C is 167±25pm/V and increased only slightly with temperature up to 100°C. These properties make this piezoelectric ceramic material suitable for ultrasonic transducers, sonars, hydrophones and other applications. © 2013 Elsevier Ltd.en0955-2219201315/1630153022Elsevier ScienceFerroelectricsLead-free ceramicsRietveld refinementSynchrotron X-raysTechnikIngenieurwissenschaftenJournal Article10.1016/j.jeurceramsoc.2013.04.036Other