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.