Ultra-low hysteresis electric field-induced strain with high electrostrictive coefficient in lead-free Ba(ZrxTi1-x)O3 ferroelectrics
Ultra-low hysteresis electric field-induced strain with high electrostrictive coefficient in lead-free Ba(ZrxTi1-x)O3 ferroelectrics
复制标题
无铅 Ba(ZrxTi1-x)O-3 铁电体中具有高电致伸缩系数的超低磁滞电场诱导应变
DOI：
10.1016/j.jallcom.2019.01.106
复制
发表时间：
2019-05-05
影响因子：
6.2
通讯作者：
Yan, Yan
中科院分区：
文献类型：
--
作者：
Jin, Li;Qiao, Jun;Yan, Yan
从应用角度来看，高精度位移执行器非常需要具有超低磁滞或无磁滞特性的高电场感应应变。在这项工作中，通过传统的固相反应方法制备了x在0.02至0.1范围内的无铅Ba(ZrxTi1-x)O-3 (BZT)铁电体。系统地研究了结构演变和电性能，重点是电致伸缩效应。随着x从0.02增加到0.1，晶格参数（a和c轴）增加，而四方性（c/a-1）下降。此外，BZT的居里温度（T-C）逐渐降低，而四方相至斜方相（T-O）和斜方相至菱面体（O-R）相变对应的温度则升高。在所有研究的组合物中都观察到超低滞后（60 kV/cm 时为 0.15%）。最重要的是，在 x = 0.1 成分中还发现了高纵向电致伸缩系数 Q(33) (0.0453 m(4)/C-2)。这项工作不仅报道了无铅 BZT 铁电体中具有超低磁滞和高 Q(33) 的高电场感应应变，而且还表明了 BZT 陶瓷在高精度位移执行器中的潜在应用。 (C) 2019 Elsevier B.V. 保留所有权利。
From the application point of view, high electric field-induced strain with ultra-low hysteresis or hysteresis-free characteristic is highly desired in high-precision displacement actuators. In this work, lead-free Ba(ZrxTi1-x)O-3 (BZT) ferroelectrics with x in the range between 0.02 and 0.1 were fabricated by a conventional solid state reaction method. The structural evolution and electrical properties were investigated systematically with an emphasis on electrostrictive effect. As x increases from 0.02 to 0.1, the crystal lattice parameters (a and c axes) increase while the tetragonality (c/a-1) goes down. In addition, the Curie temperature (T-C) of BZT decreases gradually, while the temperatures corresponding to tetragonal-to-orthorhombic (T-O) and orthorhombic-to-rhombohedral (O-R) phase transitions increase. Ultra-low hysteresis (0.15% at 60 kV/cm) are observed in all studied compositions. Most importantly, a high longitudinal electrostrictive coefficient Q(33) (0.0453 m(4)/C-2) was also identified in x = 0.1 composition. This work not only reports high electric field-induced strains with ultra-low hysteresis and high Q(33) in lead-free BZT ferroelectrics, but also indicates a potential application for BZT ceramics in high-precision displacement actuators. (C) 2019 Elsevier B.V. All rights reserved.