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Polytetrafluoroethylene piezoelectrets prepared by sintering process

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Abstract

Polytetrafluoroethylene (PTFE) films with a void structure are prepared by a sintering process. Such void PTFE films are piezoelectric after proper corona charging. The quasi-static piezoelectric d 33 coefficients up to 250 pC/N are achieved for the samples which were made of compact and biaxial-tension porous PTFE layers. Pre-ageing treatment is an effective method to further improve the thermal stability. For the samples with pre-ageing treatment, the reduction of the d 33 coefficients is around 2% per day when exposed to 120 °C.

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Authors and Affiliations

  1. Pohl Institute of Solid State Physics, Tongji University, Siping Road 1239, Shanghai, 200092, China

    X. Zhang, X. Wang, G. Cao, D. Pan & Z. Xia

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  1. X. Zhang
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  2. X. Wang
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  3. G. Cao
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  4. D. Pan
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  5. Z. Xia
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Correspondence to X. Zhang.

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Zhang, X., Wang, X., Cao, G. et al. Polytetrafluoroethylene piezoelectrets prepared by sintering process. Appl. Phys. A 97, 859–862 (2009). https://doi.org/10.1007/s00339-009-5341-9

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  • DOI: https://doi.org/10.1007/s00339-009-5341-9

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