Giant electric-field-induced strains in lead-free ceramics for actuator applications - status and perspective
Giant electric-field-induced strains in lead-free ceramics for actuator applications - status and perspective
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DOI：
10.1007/s10832-012-9742-3
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发表时间：
2012-08-01
影响因子：
1.7
通讯作者：
Roedel, Juergen
中科院分区：
文献类型：
--
作者：
Jo, Wook;Dittmer, Robert;Roedel, Juergen
为了应对当前禁止在日常电子设备中使用铅的环境法规，世界各地开展了许多研究，以寻找替代市场上占主导地位的铅基压电陶瓷，典型的是铅(Zr(X)Ti1-x)O-3(PZT)固溶体。经过化学修饰和/或晶体织构的(K，Na)NbO_3和(Bi1/2Na1/2)TiO_3基固溶体等具有潜在重要性的体系已经被开发出来。然而，到目前为止，只有少数几项成果被推向市场。最近的一项发现极大地扩展了我们的材料设计工具箱，它在电场的作用下提供了(Bi1/2Na1/2)TiO_3基陶瓷在遍历弛豫态和铁电态之间的可逆相变。这将压电效应与应变产生的相变配对，并以一种全新的方式扩大了致动器应用的机会。在这篇文章中，我们将介绍这类新型致动器陶瓷的现状和前景，旨在涵盖从基础到实践的广泛主题。
In response to the current environmental regulations against the use of lead in daily electronic devices, a number of investigations have been performed worldwide in search for alternative piezoelectric ceramics that can replace the market-dominating lead-based ones, representatively Pb(Zr (x) Ti1-x )O-3 (PZT)-based solid solutions. Selected systems of potential importance such as chemically modified and/or crystallographically textured (K, Na)NbO3 and (Bi1/2Na1/2)TiO3-based solid solutions have been developed. Nevertheless, only few achievements have so far been introduced to the marketplace. A recent discovery has greatly extended our tool box for material design by furnishing (Bi1/2Na1/2)TiO3-based ceramics with a reversible phase transition between an ergodic relaxor state and a ferroelectric with the application of electric field. This paired the piezoelectric effect with a strain-generating phase transition and extended opportunities for actuator applications in a completely new manner. In this contribution, we will present the status and perspectives of this new class of actuator ceramics, aiming at covering a wide spectrum of topics, i.e., from fundamentals to practice.