Comparison between AC and DC polarization methods of piezoelectric nanofibrous layers

Selleri, Giacomo; Gasperini, Leonardo; Piddiu, L.; Fabiani, Davide

doi:10.1109/icd53806.2022.9863546

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…Before electromechanical tests were performed, the two opposite surfaces of the nanofibrous mats were connected to the ground for 24 hours at room temperature so as to remove any residual electrostatic charges that could have been generated during the electrospinning and poling procedures [11]. The piezoelectric strain coefficient d33 (pC/N) of all the polarized samples was measured by means of a piezometer (PiezoMeter PM300, Piezotest, Singapore, www.piezotest.com).…”

Section: Electromechanical Characterizationmentioning

confidence: 99%

Corona poling for polarization of nanofibrous mats: advantages and open issues

Gasperini

Selleri

Pegoraro

et al. 2022

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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This paper deals with the polarization process of piezoelectric nanofibrous mats of PVdF-TrFE by using a corona discharge process. With respect to traditional contact poling this process reduces the electrical breakdown risk which could easily occur when a highly porous mat is placed between two solid electrodes. Different set-up configurations were investigated by varying the applied voltage and the distance between the needle and the sample. The polarized nanofibers show a piezoelectric strain coefficients (d33) comparable with the values of a commercial stiff film.

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Section: Electromechanical Characterizationmentioning

confidence: 99%

Corona poling for polarization of nanofibrous mats: advantages and open issues

Gasperini

Selleri

Pegoraro

et al. 2022

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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“…To confer a macroscale piezoelectric behavior to the polymeric materials and align the molecular dipoles within the crystalline lattice uniformly, a process called poling is required. Traditional polarization methods involve contact poling using direct or alternating current [5], [6]. However, these techniques often pose challenges, particularly when dealing with materials that require high coercive electric fields.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Corona Triode Polarization by 2D Electrostatic Mapping

Gasperini,

Rumi,

Selleri

et al. 2023

2023 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Traditional methods for characterizing piezoelectric materials typically involve analyzing their electromechanical response, focusing on coefficients such as the piezoelectric strain coefficient d33. In this study, an alternative approach is proposed to evaluate the piezoelectric response by examining the surface charge accumulated in the tested sample following a corona polarization process. Through the use of an electrostatic voltmeter, two influential factors affecting the piezoelectric response were investigated: the number of needles employed during the polarization and the presence of a grid interposed between the high-voltage needles and the specimen.

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