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Dielectric and Piezoelectric Properties in Mn‐Modified (1− x )BiFeO 3 – x BaTiO 3 Ceramics
Author(s) -
Leontsev Serhiy O.,
Eitel Richard E.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03313.x
Subject(s) - materials science , ferroelectricity , barium titanate , bismuth ferrite , dielectric , piezoelectricity , perovskite (structure) , mineralogy , hysteresis , piezoelectric coefficient , phase transition , solid solution , ceramic , electrical resistivity and conductivity , analytical chemistry (journal) , condensed matter physics , composite material , crystallography , multiferroics , metallurgy , optoelectronics , chemistry , physics , engineering , chromatography , electrical engineering
In the current work, the bulk (1− x )BiFeO 3 – x BaTiO 3 system has been studied as a potential lead‐free piezoelectric material. Barium titanate (BaTiO 3 ) in solid solution with bismuth ferrite (BiFeO 3 ) is observed to stabilize the perovskite structure and improve switching behavior. Samples with various content of BaTiO 3 were prepared via solid‐state route, and pure perovskite phase was confirmed by X‐ray diffraction. Modification of the BaTiO 3 –BiFeO 3 material with Mn improved DC resistivity by one to five orders of magnitude (7.6 × 10 12 vs. 2.7 × 10 7 Ω·m for 25 mol% BaTiO 3 at room temperature) and polarization hysteresis measurements indicated “hard” ferroelectric behavior with the highest strain response at 33 mol% BaTiO 3 . Finally, low‐field piezoelectric d 33 coefficient of 116 pC/N and ferroelectric transition temperature above 450°C are reported for 25 mol% BaTiO 3 composition.