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| 1 | 铁电材料的疲劳失效行为显示文摘在航空航天、核能发电等重大装备技术领域,作为高温传感/驱动/能量收集器件的敏感材料——铋层状结构铁电(BLSF)陶瓷在复杂载荷环境下的疲劳失效问题严重限制着器件寿命和可靠性的提高.本文以BLSF陶瓷的应用需求为背景,围绕铁电材料的疲劳裂纹扩展与电畴极化翻转及其相互作用机制等关键问题,综述了铁电材料在热、力、电三种载荷及其耦合作用下疲劳失效行为的研究现状,并根据当前铁电材料的一些新发展、新应用对其未来研究方向进行了展望,旨在为高性能、长寿命铁电/压电器件设计提供参考. | 陈渝 周华将 谢少雄 徐倩 朱建国 王清远 | 2021 | 力学进展2021，51，4： | 1 |
| 2 | A multiaxial lead-free two-dimensional organic-inorganic perovskite ferroelectric显示文摘Two-dimensional(2 D)hybrid organic-inorganic perovskites(HOIPs)have recently gained tremendous interest because of their unique features in contrast to three-dimensional counterparts and traditional 2 D materials.However,although some 2 D HOIP ferroelectrics have been achieved,the issue of toxic Pb and uniaxial nature impede their further application.Herein,for the first time,we report a lead-free 2 D HOIP multiaxial ferroelectric,[3,3-difluorocyclobutylammonium]2 CuCl4(1),which shows four ferroelectric axes and eight equivalent polarization directions,more than those of the other 2 D HOIP ferroelectrics and even the inorganic perovskite ferroelectric BaTiO3(three ferroelectric axes and six equivalent polarization directions).1 also features a high Curie temperature of 380 K and exhibits remarkable thermochromism of color change from green-yellow to dark brown.To our knowledge,1 is the first multiaxial lead-free2 D HOIP ferroelectric.This work sheds light on the exploration of better lead-free 2 D HOIP ferroelectrics. | Chao-Ran Huang Xuzhong Luo Xiao-Gang Chen Xian-Jiang Song Zhi-Xu Zhang Ren-Gen Xiong | 2021 | National Science Review2021，8，5： | 0 |
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