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Electromechanical Properties of Lead‐Free Nb‐Doped 0.95Bi0.5Na0.5TiO3‐0.05BaZrO3 Piezoelectric Ceramics

Lead‐free piezoelectric 0.95(Bi0.5Na0.5Ti1−xNbx)O3‐0.05BaZrO3 (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‐ra...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2018-10, Vol.215 (20), p.n/a
Main Authors: Hussain, Ali, Maqbool, Adnan, Malik, Rizwan Ahmed, Qazi, Ibrahim, Song, Tae‐Kwon, Kim, Won‐Jeong, Kim, Myong‐Ho
Format: Article
Language:English
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Summary:Lead‐free piezoelectric 0.95(Bi0.5Na0.5Ti1−xNbx)O3‐0.05BaZrO3 (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(Bi0.5Na0.5Ti)O3‐0.05BaZrO3 (BNT‐BZ5). An enhanced field‐induced strain (Smax = 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. A large field‐induced strain of 0.37% with a normalized strain d*33 of 542 pm V−1 is observed for x = 0.005. The findings of present work suggests that for large strain response, not only suitable chemical modifier is important, but the selection of the base composition also play a crucial role.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201700942