Achieving Both High d(33) and High Q(m) for the Pb(Zr0.26Sn0.26Ti0.48)(1-x)FexO3-x/2 Ternary System for Use in High-Power Ultrasonic Transducers

作者：Xing Zhuo^*; Jin Li; Wang Tong; Hu Qingyuan; Feng Yujun; Wei Xiaoyong

来源：Journal of Electronic Materials, 2014, 43(11): 3905-3911.

DOI：10.1007/s11664-014-3311-2

• Piezoelectric
• PZST ceramics
• Rayleigh law
• dielectric

For applications in high power ultrasonic transducers, both high piezoelectric coefficients d (33) and high mechanical quality factor Q (m) are essential. In this work, acceptor-doped Pb(Zr0.26Sn0.26Ti0.48)(1-x) Fe (x) O3-x/2 ferroelectric ceramics with compositions near the morphotropic phase boundary were prepared by routine solid-state reaction. By introducing Fe3+ ion into the perovskite crystal lattices, defect dipoles resulting from Fe3+ ions and oxygen vacancies are formed, pinning extrinsic domain wall motion, and hence increasing Q (m) but reducing d (33). It was found that substitution with 0.5 mol% Fe3+ resulted in high d (33) (390 pC/N) and high Q (m) (540). The nonlinear dielectric responses of these ceramics were evaluated on the basis of the Rayleigh law. Both Rayleigh coefficients, and are reduced by doping with the acceptor ion Fe3+, indicating that the intrinsic contribution and reversible domain wall mobility are both reduced.

• 出版日期2014-11
• 单位西安交通大学