铁电材料疲劳后出现的内部不同区域中的疲劳程度不一致,称为铁电疲劳不均匀性.概述了在铁电薄膜、陶瓷、单晶中观察到的疲劳不均匀现象,介绍了铁电材料中近电极区域的疲劳集中现象,针对铁电材料的极化反转机制和铁电疲劳不均匀性的微观机理进行了阐述分析,并展望了今后的研究方向即利用压电响应力显微术从微米纳米尺度对疲劳不均匀性进行深入研究.
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