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压电材料聚偏氟乙烯的介电常数随电场和温度的变化

Changes in Permittivity of the Piezoelectric Material PVDF as Functions of the Electrical Field and Temperature.

作者信息

Zhou You, Zaghloul Mona

机构信息

School of Engineering and Applied Science, The George Washington University, Washington, DC 20052, USA.

出版信息

Materials (Basel). 2021 Oct 1;14(19):5736. doi: 10.3390/ma14195736.

DOI:10.3390/ma14195736
PMID:34640147
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8510207/
Abstract

Polyvinylidene Fluoride (PVDF) is becoming a widely used piezoelectric material because of its flexibility, low cost, light weight, and biocompatibility. Its electronic properties, such as its permittivity, can be affected by material crystal structure variations, which also greatly impact the material's application. It is known that external stress and electrical fields can alter the crystal structure of piezoelectric material. In this research, we aim to investigate the relationship between the external electrical field and the permittivity property of PVDF material. The basic standard equations, finite element analysis, and experimental measurement are included in this paper. By using sweeping voltages from -25 V to +25 V using an Agilent Technologies B1500A Semiconductor Device Analyzer, an increase in the permittivity of the PVDF material is observed. In this work, the study of the permittivity change under the application of different electrical fields at room temperature is presented, and the application of the electrical field under different temperatures is also studied and presented.

摘要

聚偏氟乙烯（PVDF）因其柔韧性、低成本、重量轻和生物相容性，正成为一种广泛使用的压电材料。其电学性质，如介电常数，会受到材料晶体结构变化的影响，这也极大地影响了材料的应用。众所周知，外部应力和电场会改变压电材料的晶体结构。在本研究中，我们旨在研究外部电场与PVDF材料介电常数特性之间的关系。本文包括基本标准方程、有限元分析和实验测量。通过使用安捷伦科技公司的B1500A半导体器件分析仪施加从-25 V到+25 V的扫描电压，观察到PVDF材料的介电常数有所增加。在这项工作中，展示了在室温下不同电场作用下介电常数变化的研究，同时也研究并展示了不同温度下电场的应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e640/8510207/63556fb60eff/materials-14-05736-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e640/8510207/63556fb60eff/materials-14-05736-g008.jpg

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