Sintered (Bi,Na)TiO3 piezoelectric body

摘要

A piezoelectric body containing (Bi_1/2Na_1/2)TiO₃ as a main component which is obtained by forming and sintering powders. A heterogeneous phase other than (Bi_1/2Na_1/2)TiO₃ system perovskite phase in the powders has a peak ratio relative to the strongest peak of the perovskite phase of 5% or lower as determined by powder X-ray diffraction. As a result, the frequency of producing dielectric breakdown in a sintered piezoelectric body during polarization can be dramatically reduced to 0.1 to 2%. The manufacturing yield can be increased and manufacturing cost can be reduced and the reliability of products manufactured therefrom can be improved.