TY - JOUR
T1 - Impacts of acceptor doping on the piezoelectric properties and domain structure in NBT-based lead-free ceramics
AU - Qin, Yalin
AU - Zhang, Shujun
AU - Wu, Yanqing
AU - Lu, Chaojing
AU - Zhang, Jialiang
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/9
Y1 - 2017/9
N2 - The domain structure and piezoelectric properties of Mn-doped 0.79(Na0.5Bi0.5)TiO3-0.14(K0.5Na0.5)TiO3-0.07BaTiO3 (BNBK79) ceramics were studied. The relationship between macroscopic properties and microstructure was established. The pure and Mn doped BNBK79 ceramics show different dynamic behavior in strain behavior and polarization hysteresis, due to the different domain structure and domain switching behavior. The BNBK79 ceramics show dominating irregular watermarks domain configuration before poling, changes to simple parallel stripes after poling, while BNBK79-Mn ceramics show more complicated domain configurations, where regular domain stripes containing Herringbones assembled with watermarks are dominated before poling, and the Herringbones remain after poling. The pinning effect induced by MnTi''−V0. defect dipoles accounts for the complicated domain structure and hinders the domain switching, resulting in “hard” properties (low dielectric loss of 0.6% and high mechanical quality factor Qm of 1100), makes BNBK79-Mn ceramics promising for high-power piezoelectric applications.
AB - The domain structure and piezoelectric properties of Mn-doped 0.79(Na0.5Bi0.5)TiO3-0.14(K0.5Na0.5)TiO3-0.07BaTiO3 (BNBK79) ceramics were studied. The relationship between macroscopic properties and microstructure was established. The pure and Mn doped BNBK79 ceramics show different dynamic behavior in strain behavior and polarization hysteresis, due to the different domain structure and domain switching behavior. The BNBK79 ceramics show dominating irregular watermarks domain configuration before poling, changes to simple parallel stripes after poling, while BNBK79-Mn ceramics show more complicated domain configurations, where regular domain stripes containing Herringbones assembled with watermarks are dominated before poling, and the Herringbones remain after poling. The pinning effect induced by MnTi''−V0. defect dipoles accounts for the complicated domain structure and hinders the domain switching, resulting in “hard” properties (low dielectric loss of 0.6% and high mechanical quality factor Qm of 1100), makes BNBK79-Mn ceramics promising for high-power piezoelectric applications.
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U2 - 10.1016/j.jeurceramsoc.2017.04.047
DO - 10.1016/j.jeurceramsoc.2017.04.047
M3 - Article
AN - SCOPUS:85018170121
SN - 0955-2219
VL - 37
SP - 3493
EP - 3500
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 11
ER -