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Structure and electrical properties of 0.85(Bi0.5Na0.5)TiO3-0.12BaTiO3-0.03SrTiO3 ferroelectric ceramics
Publikationstyp
Journal Article
Date Issued
2013-06-14
Sprache
English
TORE-URI
Volume
33
Issue
15/16
Start Page
3015
End Page
3022
Citation
Journal of the European Ceramic Society 15-16 (33): 3015-3022 (2013)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
The 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.
Subjects
Ferroelectrics
Lead-free ceramics
Rietveld refinement
Synchrotron X-rays
DDC Class
600: Technik
620: Ingenieurwissenschaften
More Funding Information
Deutsche Forschungsgemeinschaft (DFG)