COMPOSITE BISMUTH-BASED LEAD-FREE PIEZOELECTRIC CERAMICS AND PREPARING METHOD THEREOF

摘要

The present invention relates to composite bismuth-based lead-free piezoelectric ceramics and a method for preparing bismuth-based lead-free piezoelectric ceramics and, more specifically, to composite bismuth-based lead-free piezoelectric ceramics having excellent electric field induced strain in a low electric field, an actuator including the same and a method for preparing bismuth-based lead-free piezoelectric ceramics. The composite bismuth-based lead-free piezoelectric ceramics according to an embodiment of the present invention replaces Ti of (Bi,Na)TiO_3 with one element among Fe, Al and Sc in a (Bi,Na)TiO_3-SrTiO_3 based solid-solution composition made by adding SrTiO_3 to (Bi,Na)TiO_3 based parent composition and can have a perovskite crystal structure.;COPYRIGHT KIPO 2017