P1-5 PbTiO_3-Pb(Mg_<1/3>Nb_<2/3>)O_3系電歪セラミックスのDCバイアス下におけるハイパワー特性(ポスター発表)

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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.
超音波エレクトロニクスの基礎と応用に関するシンポジウム運営委員会の論文
2006-11-15