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- W3114265981 abstract "压电驻极体是具有压电效应的微孔结构空间电荷驻极体材料，其压电性能与材料的微结构和空间电荷密切相关. 本文首先利用压缩气体膨化工艺对聚丙烯（PP）的微结构进行改性，然后利用接触极化方法，研究了极化电压与PP膜空间电荷密度之间的关系，及其对压电性能的影响. 结果表明对于极化前厚度为100 m的PP膜，其内部建立有序空间电荷分布的阈值极化电压为2 kV；一旦有序空间电荷建立起来，PP膜即具有压电效应. 随着极化电压的提高，PP膜的空间电荷密度逐步增大，压电效应显著增强. 当峰值电压为8 kV时，PP膜电极上的电荷密度、准静态压电系数和品质因数FOMv（d33 g33）分别为0.56 mC/m2，379 pC/N和8.6（GPa）-1. PP压电驻极体膜的FOMv 比聚偏氟乙烯（PVDF）铁电聚合物膜高2个量级以上，且声阻抗非常低（～ 0.025 MRayl），因此该压电膜在超声波发射-接收系统或脉冲-回波系统中具有明显的优势." @default.
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- W3114265981 date "2014-01-01" @default.
- W3114265981 modified "2023-09-27" @default.
- W3114265981 title "Influence of polarization voltage on piezoelectric performance of polypropylene piezoelectret films" @default.
- W3114265981 doi "https://doi.org/10.7498/aps.63.157703" @default.
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