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Bipolar piezoelectric fatigue of Bi(Zn<sub>0.5</sub>Ti<sub>0.5</sub>)O<sub>3</sub>-(Bi<sub>0.5</sub>K<sub>0.5</sub>)TiO<sub>3</sub>-(Bi<sub>0.5</sub>Na<sub>0.5</sub>)TiO<sub>3</sub> Pb-free ceramics
70
Citations
29
References
2012
Year
Materials ScienceEngineeringPiezoelectric Fatigue BehaviorMechanical PropertiesFatigue Free BehaviorFerroelectric ApplicationMechanical EngineeringCeramics MaterialsFerroelectric MaterialsPiezoelectric MaterialsPiezoelectricityPiezoelectric MaterialElectrical PropertiesFunctional MaterialsBipolar Piezoelectric FatigueSolid SolutionsStructural Materials
The piezoelectric fatigue behavior of Pb-free ceramics based on solid solutions of Bi(Zn0.5Ti0.5)O3-(Bi0.5K0.5)TiO3-(Bi0.5Na0.5)TiO3 was characterized at 50 kV/cm after 106 bipolar cycles. Ferroelectric compositions containing 2.5% Bi(Zn0.5Ti0.5)O3 exhibited only minor losses in maximum strain (∼10%). In compositions with 5% Bi(Zn0.5Ti0.5)O3 that exhibit large electric field-induced strains, the electromechanical strain actually increased 4%, exhibiting essentially fatigue free behavior. This finding demonstrates that these materials have excellent potential for demanding high cycle applications such as microelectromechanical systems actuators.
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