Preparation of PMZN Piezoceramic Using Sol-Autocombustion Synthesized PZT Powder as a Base

摘要

Using Zr(NO_3)_4. 5H_2O as Zr source, PZT powder with a single-phase perovskite structure was synthesized by a sol-autocombustion method at a calcining temperature of 700℃. Compared with a solid-state reaction method, the calcining temperature of PZT can be lowered by 200℃ when using the sol-autocombustion method. PMZN ceramic was prepared at a sintering temperature of 1050℃ with the resulting PZT powder as a base, which can lower the sintering temperature by 150℃. The microstructure of the PMZN ceramic was investigated by XRD and SEM, and the dielectric and piezoelectric properties were measured. The results showed that the PMZN piezoelectric ceramic has a tetragonal perovskite structure, showing the main electrical properties as follows: K_p = 0.54, Q_m = 1073, tgδ ≤ 0.001, ε_(33)~T/ε_0 = 1236, d_(33) = 454pC/N, and f_s =136.1KHz.