Influence of gas pressure in the voids during charging on the piezoelectricity of ferroelectrets

Xunlin Qiu; Axel Mellinger; Reimund Gerhard

doi:10.1063/1.2841037

Influence of gas pressure in the voids during charging on the piezoelectricity of ferroelectrets

Xunlin Qiu, Axel Mellinger, Reimund Gerhard

Physics

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Cellular polypropylene ferroelectrets were subjected to vacuum and high air pressures. The capacitance of the samples was measured as a way to monitor their thickness. It was found that both in vacuum and in high-pressure air, the thickness of the samples recovers to its original value after a sufficient storage time (typically, several hours), indicating that the internal and external pressures equalize as a result of gas diffusion. Optimal piezoelectricity is achieved by charging at a pressure of 170 kPa, which is explained by means of the void-height distribution function in combination with Townsend's model of the Paschen breakdown.

Original language	English
Article number	052901
Journal	Applied Physics Letters
Volume	92
Issue number	5
DOIs	https://doi.org/10.1063/1.2841037
State	Published - 2008

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10.1063/1.2841037

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abstract = "Cellular polypropylene ferroelectrets were subjected to vacuum and high air pressures. The capacitance of the samples was measured as a way to monitor their thickness. It was found that both in vacuum and in high-pressure air, the thickness of the samples recovers to its original value after a sufficient storage time (typically, several hours), indicating that the internal and external pressures equalize as a result of gas diffusion. Optimal piezoelectricity is achieved by charging at a pressure of 170 kPa, which is explained by means of the void-height distribution function in combination with Townsend's model of the Paschen breakdown.",

author = "Xunlin Qiu and Axel Mellinger and Reimund Gerhard",

note = "Funding Information: We are indebted to Dr. Guggi Kofod and Werner Wirges (University of Potsdam) for stimulating discussions. The SEM images were provided by Dr. Brigitte Tiersch (Department of Chemistry, University of Potsdam). One of the authors (X.Q.) thanks the Deutsche Forschungsgemeinschaft (DFG) for providing a Research Fellowship (Reference No. QI65/1-1).",

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N2 - Cellular polypropylene ferroelectrets were subjected to vacuum and high air pressures. The capacitance of the samples was measured as a way to monitor their thickness. It was found that both in vacuum and in high-pressure air, the thickness of the samples recovers to its original value after a sufficient storage time (typically, several hours), indicating that the internal and external pressures equalize as a result of gas diffusion. Optimal piezoelectricity is achieved by charging at a pressure of 170 kPa, which is explained by means of the void-height distribution function in combination with Townsend's model of the Paschen breakdown.

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Influence of gas pressure in the voids during charging on the piezoelectricity of ferroelectrets

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