P2-32 Exploration of piezoresponse and applicability based on Nb-doped lead zirconate titanate ceramic(Short presentation for poster)

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In this presentation, modified lead zirconate titanate (PZT) piezoceramics with a composition Zr/Ti=53/47 containing 1 mole% Nb were prepared by conventional ceramic technology sintering powder compacts. Replacement of Ti^<+4> by Nb^<+5> in such perovskite type solid solutions was accomplished by the creation of cation vacancies. Modified ceramics were explored as a function of firing temperature to acquire exceedingly good piezoelectric characterizations. Under the processing conditions, calcined at 850℃ for 2 h, and then sintered at 1250℃ for 2 h, PZT piezoceramic showed the minimum mechanical quality factor Q_m 50 and maximum electromechanical coupling factor k_p 0.62. Measured P-E hysteresis loop illustrated that the remanent polarization (P_r) and coercive field (E_c) were 8.63 μC/cm^2 and 17.2 kV/cm, respectively. A fundamental planar mode appeared and the resonance frequency was around 200 KHz, which was suitable for piezoelectric resonator and filter applications. Besides, we also fabricated a disk-shaped sample simulated by pulse generator and surveyed the applicability of piezoresponse.
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
2004-10-27