Achieving Both High d33 and High Qm for the Pb(Zr0.26Sn0.26Ti0.48)1−xFexO3−x/2 Ternary System for Use in High-Power Ultrasonic Transducers
Achieving Both High d33 and High Qm for the Pb(Zr0.26Sn0.26Ti0.48)1−xFexO3−x/2 Ternary System for Use in High-Power Ultrasonic Transducers
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DOI：
10.1007/s11664-014-3311-2
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发表时间：
2014-07
影响因子：
2.1
通讯作者：
Zhuo Xing;Li Jin;Tong Wang;Q. Hu;Yujun Feng;Xiaoyong Wei
中科院分区：
文献类型：
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作者：
Zhuo Xing;Li Jin;Tong Wang;Q. Hu;Yujun Feng;Xiaoyong Wei
对于高功率超声换能器的应用，高的压电系数d和高的机械品质因数Q都是必不可少的。本工作采用常规固相反应法制备了受主掺杂的接近准同型相界的受主掺杂的Pb型铁电陶瓷。通过在钙钛矿晶格中引入Fe离子，形成了由Fe离子和氧空位引起的缺陷偶极子，钉扎了非本征磁畴壁运动，从而增加了Q但减小了d。结果表明，当Fe掺杂0.5mol%时，d(390pC/N)和Q(540)较高。根据瑞利定律计算了这些陶瓷的非线性介电响应。掺入受主离子Fe后，瑞利系数和都减小，表明本征贡献和可逆畴壁迁移率都降低了。
For applications in high power ultrasonic transducers, both high piezoelectric coefficients d and high mechanical quality factor Q are essential. In this work, acceptor-doped Pb (ZrSnTi) FeO ferroelectric ceramics with compositions near the morphotropic phase boundary were prepared by routine solid-state reaction. By introducing Fe ion into the perovskite crystal lattices, defect dipoles resulting from Fe ions and oxygen vacancies are formed, pinning extrinsic domain wall motion, and hence increasing Q but reducing d. It was found that substitution with 0.5 mol% Fe resulted in high d (390 pC/N) and high Q (540). The nonlinear dielectric responses of these ceramics were evaluated on the basis of the Rayleigh law. Both Rayleigh coefficients,andare reduced by doping with the acceptor ion Fe, indicating that the intrinsic contribution and reversible domain wall mobility are both reduced.