History and recent progress in ferroelectrets produced in Brazil

Ruy Alberto Pisani Altafim; Ruy Alberto Corrêa Altafim

doi:10.1142/S2010135X23410072

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[2] Constant current corona charging of PVF2. J. Appl. Phys., 56, 1487(1984).

[3] A novel method for electret production using impulse voltages. IEEE Trans. Electr. Insul., 27, 739(1992).

[4] Charging of cellular space-charge electret films in various gas atmospheres. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 24-27(2001).

[5] Electrode poling of cellular polypropylene films with short high-voltage pulses. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 299-302(2002).

[6] Piezoelectricity of multi-layers space-charge electrets from Teflon FEP films with homogeneous voids distributed on its surface. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 225-228(2003).

[7] Piezoelectricity in multi-air voids electrets. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 669-672(2005).

[8] Piezoelectrets from thermo-formed bubble structures of fluoropolymers-electret films. IEEE Trans. Dielectr. Electr. Insul., 13, 979(2006).

[9] Piezoelectricity of a single bubble formed by two oppositely charged TeflonⓇ-FEP films. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 146-149(2006).

[10] Three-layer ferroelectrets from perforated Teflon-PTFE films fused between two homogeneous Teflon-FEP film. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 453-456(2007).

[11] Template-based fluoroethylene propylene piezoelectrets with tubular channels for transducer applications. J. Appl. Phys., 106, 014106(2009).

[12] Resonance frequency analysis in open tubular channels ferroelectrets by interferometry. OSA Latin America Optics and Photonics Conf., 27-30(2010).

[13] Piezoelectric sensor based on electret thermoforming technology. Proc. Inter. Conf. Solid Dielectrics, 1-3(2010).

[14] Multi-layers fluoroethylenepropylene (FEP) films bounded with adhesive tape to create piezoelectrets with controlled cavities. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 137-140(2011).

[15] Thermo-formed piezoelectrets with open-tubular channels produced from water-filled FEP pads. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 648-651(2015).

[16] Piezoelectrets with well-defined cavities produced from 3D-printed acrylonitrile-butadiene styrene structures. Electron. Lett., 51, 2028(2015).

[17] Hydrophone based on 3D printed polypropylene (PP) piezoelectret. Electron. Lett., 55, 203(2019).

[18] A new route to piezo-polymer transducers: 3D printing of polypropylene ferroelectrets. IEEE Trans. Dielectr. Electr. Insul., 27, 1668(2020).

[19] Adding an electroactive response to 3D printed materials: Printing a piezoelectret. Addit. Manuf., 31, 100963(2020).

[20] Piezoelectric-magnetic behavior of ferroelectrets coated with magnetic layer. Appl. Phys. Lett., 119, 241901(2021).

[21] Mechanical and electrical response of charged polymers with cellular structure. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 43-46(1999).

[22] Electromechanical film (EMFi) — A new multipurpose electret material. Sensor. Actuator. A Phys., 84, 95(2000).

[23] New piezoelectric polymer for air-borne and water-borne sound transducers. J. Acoust. Soc. Am., 109, 1412(2001).

[24] Broadband ultrasonic transducer for a artificial bat head. Proc. Ultrasonics Symp., 1364-1367(2003).

[25] Piezoelectret sensors detect geometry-related modifications of the acoustical signatures from partial discharges in an electrical equipment chamber. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 108-111(2012).

[26] Different piezoelectric structures applied to acoustic detection of impulse and corona partial discharges. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 1242-1245(2013).

[27] Acoustic detection of single and multiple air-gap partial discharges with piezoelectrets transducers. Proc. Conf. Electrical Insulation and Dielectric Phenomena, 216-219(2014).

[28] Piezoelectret-based hydrophone: An alternative device for vibro-acoustography. J. Meas. Sci. Technol., 26, 095102(2015).

[29] Ferroelectret-based hydrophone employed in oil identification — A machine learning approach. Sensors, 20, 2979(2020).

[30] Electret accelerometers: Physics and dynamic characterization. J. Acoust. Soc. Am., 129, 3682(2011).

[31] An accelerometer based on thermoformed piezoelectrets with open-tubular channels. Proc. Int. Conf. Dielectric Physics, 524-526(2020).