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Electromechanical Properties of Lead‐Free Nb‐Doped 0.95Bi 0.5 Na 0.5 TiO 3 ‐0.05BaZrO 3 Piezoelectric Ceramics
Author(s) -
Hussain Ali,
Maqbool Adnan,
Malik Rizwan Ahmed,
Qazi Ibrahim,
Song TaeKwon,
Kim WonJeong,
Kim MyongHo
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700942
Subject(s) - materials science , piezoelectricity , microstructure , dielectric , doping , analytical chemistry (journal) , piezoelectric coefficient , perovskite (structure) , electric field , ceramic , polarization (electrochemistry) , mixed oxide , diffraction , mineralogy , oxide , composite material , crystallography , metallurgy , optics , optoelectronics , chemistry , physics , chromatography , quantum mechanics
Lead‐free piezoelectric 0.95(Bi 0.5 Na 0.5 Ti 1− x Nb x )O 3 ‐0.05BaZrO 3 (BNTN‐BZ5) ceramics (with x = 0–0.02) are synthesized by a conventional mixed oxide route. The crystalline phase, microstructure and electromechanical properties of the BNTN‐BZ5 are investigated as a function of different Nb content. X‐ray diffraction analysis shows the formation of single phase perovskite structure for all samples. The polarization response decrease while the dielectric and field‐induced strain response increase when a small amount ( x = 0.005) of Nb is incorporated in 0.95(Bi 0.5 Na 0.5 Ti)O 3 ‐0.05BaZrO 3 (BNT‐BZ5). An enhanced field‐induced strain ( S max = 0.37%) with a corresponding dynamic piezoelectric coefficient ( d * 33 ) of 542 pm V −1 is observed for x = 0.005 at an applied electric field of 7 kV mm −1 .