Abstract
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.
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