Piezoelectric Properties and Dielectric Property of Li Added KNN Ceramics

摘要

Recently, high performance lead-free piezoelectric materials are strongly demanded for environmental issues. (K0.5Na0.5)NbO_3 (KNN) has been attracting interest as lead-free piezoelectric ceramics because of its high Curie temperature and excellent piezoelectric properties. In this study, we investigated effects of Li addition on piezoelectric properties of (Li,Na,K)(Nb+Ta)03+CuO,BaTiO_3 . We found that optimum Li ratio of A site and B site on the perovskite structure increases relative density and ε_(33)~T~/ε_0.