NDLI: Polyethylene-naphthalate (PEN) ferroelectrets: cellular structure, piezoelectricity and thermal stability

Content Provider	IEEE Xplore Digital Library
Author	Peng Fang Xunlin Qiu Wirges, W. Gerhard, R. Zirkel, L.
Copyright Year	1994
Abstract	Cellular polyethylene-naphthalate (PEN) ferroelectrets are useful as soft and flexible electromechanical transducer materials. Improved cellular PEN foams are prepared by means of a "voiding + inflation + stretching" process and investigated with respect to their structure and their applications-relevant properties. It is found that most of the cellular voids have heights below 8 μm. The polymer walls do not allow sufficient gas exchange between the voids and the ambient atmosphere, when the cellular films are exposed to atmospheric pressures between a millibar and a few bars. As expected for ferroelectrets, a threshold voltage for charging is observed: A reasonable piezoelectric coefficient d₃₃ is only found when the charging voltage is higher than 4 kV. Furthermore, d₃₃ increases with charging voltage and reaches saturation at approximately 8 kV. Annealing after charging or charging at elevated temperatures may enhance the thermal stability of the PEN ferroelectrets. The d₃₃ of properly annealed samples is stable up to the respective annealing temperatures, but the annealing process reduces the piezoelectric activity of charged ferroelectret films to some extent. Samples charged at suitable elevated temperatures show much better thermal stability than those charged at room temperature, but the charging temperature should be limited to values below the material's glass-transition temperature T_g. Furthermore, the relevant elastic modulus c₃₃ of PEN ferroelectrets may decrease upon thermal treatment.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
File Size	2711237
File Format	PDF
ISSN	10709878
Volume Number	17
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Piezoelectricity Thermal stability Temperature Annealing Polymer films Piezoelectric films Threshold voltage Piezoelectric transducers Biological materials Atmosphere
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Piezoelectricity and dynamic characteristics of laminated fluorocarbon films

Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene- propylene copolymer films - A comparison

Piezoelectric two-layer stacks of cellular polypropylene ferroelectrets: transducer response at audio and ultrasound frequencies

Piezoelectricity in cellular electret films

Bending piezoelectricity in SAN and ABS copolymer films

Improving the thermal stability of 1-3 piezoelectric composite transducers

Dynamic shear piezoelectricity of poly(vinylidene fluoride) thin films

Piezoelectrically actuated dome-shaped diaphragm micropump

Properties of transverse ultrasonic transducers of ferroelectric polymers working in thickness shear modes

Polyethylene-naphthalate (PEN) ferroelectrets: cellular structure, piezoelectricity and thermal stability

Similar Documents

Piezoelectricity and dynamic characteristics of laminated fluorocarbon films

Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene- propylene copolymer films - A comparison

Piezoelectric two-layer stacks of cellular polypropylene ferroelectrets: transducer response at audio and ultrasound frequencies

Piezoelectricity in cellular electret films

Bending piezoelectricity in SAN and ABS copolymer films

Improving the thermal stability of 1-3 piezoelectric composite transducers

Dynamic shear piezoelectricity of poly(vinylidene fluoride) thin films

Piezoelectrically actuated dome-shaped diaphragm micropump

Properties of transverse ultrasonic transducers of ferroelectric polymers working in thickness shear modes

Polyethylene-naphthalate (PEN) ferroelectrets: cellular structure, piezoelectricity and thermal stability