High-performance Pb-free piezoelectrics surpassing soft PZT

基于本课题组长提出的三点MPB理论，我们开发了两种新型无铅压电系统BST-BCT和BHT-BCT，它们表现出大压电常数（d33>500pC/N），创无铅系统历史新高。我们通过高分辨率电子显微镜和 CBED 确定了如此高性能的原因。我们的结果可以为设计高性能压电材料提供指导。

Based on triple-point MPB theory proposed by the present principal investigator, we have developed two new Pb-free piezoelectric systems, BST-BCT and BHT-BCT, which exhibit large piezoelectric constant (d33>500pC/N), a record-high value for Pb-free systems. We have identified the cause of such high properties by means of high-resolution electron microscopy and CBED. Our results may provide a guide to designing high-performance piezoelectric materials.