Abstract
We have developed the piezoelectric ceramics for high power applications. We focused efforts on (1-x)PbTiO_3-Pb(Mg_<1/3>Nb_<2/3>)O_3 (x=1.00, 0.95, 0.90) electrostrictive ceramics which haven't almost domain wall causing the increase of energy loss such as heat generations. We investigated DC bias field dependence on high-power characteristics for PbTiO_3-Pb(Mg_<1/3>Nb_<2/3>)O_3 electrostrictive ceramics using electrical transient response method. The Q_m for the paraelectric crystal phase composition at room temperature maintains over 5000 at high stress level under dc bias field. Furthermore, the piezoelectric d_<31> constant is almost the same as that of hard lead zirconate titanate (PZT). Electrostrictive ceramics are therefore superior electromechanical vibrator material for high power application.
