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In this paper we present a set of (Bi0.5Na0.5)TiO3-based lead-free ceramics which can provide large strain in response to an external electric field. An effective piezoelectric constant, Smax/Emax, as high as 830 pm/V, is obtained in optimized compositions under proper exciting conditions. This value is comparable to some soft PZT ceramics used in modern multilayer actuators. Electromechanical measurements...
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