DocumentCode :
684207
Title :
Fatigue and recovery of cellular-polypropylene piezoelectrets during and after dielectric-barrier discharges
Author :
Xunlin Qiu ; Sborikas, M. ; Wirges, Werner ; Gerhard, Reimund
Author_Institution :
Dept. of Phys. & Astron., Univ. of Potsdam, Potsdam, Germany
fYear :
2013
fDate :
20-23 Oct. 2013
Firstpage :
591
Lastpage :
594
Abstract :
Ferroelectrets (also called piezoelectrets) are internally charged polymer foams that combine high direct and inverse piezoelectricity with high mechanical flexibility and good elastic compliance. The poling process of the cavities inside the material requires dielectric barrier discharges (DBDs). In DBDs, at least one of the inner surfaces of the discharge gap is provided by a dielectric layer. DBDs produce an internal plasma with - among others - energetic and often reactive charged particles, electrons, and neutral species. The existence of these particles facilitates the charging process. However, the inner surfaces of the cavities are thus also exposed to a highly reactive plasma. Repeated DBDs in air may result in significant fatigue of the effective polarization and hence also of the piezoelectricity and of the ferroic behavior in cellular-polypropylene (PP) ferroelectrets - mainly because of plasma-surface interactions in the cavities. In this paper, the recovery of the piezoelectricity in fatigued cellular-polypropylene ferroelectrets is studied, and the influence of storage times and different storage conditions on the stability of the piezoelectricity in fatigued samples is explored.
Keywords :
discharges (electric); ferroelectric materials; piezoelectric materials; piezoelectricity; cellular-polypropylene piezoelectrets; charging process; dielectric barrier discharges; fatigued cellular-polypropylene ferroelectrets; high direct piezoelectricity; highly reactive plasma; internal plasma; internally charged polymer foams; inverse piezoelectricity; poling process; storage condition; storage time; Cavity resonators; Dielectrics; Fatigue; Laboratories; Piezoelectricity; Polymers; Surface treatment; dielectric barrier discharges (DBDs); ferroelectrets; piezoelectricity; plasma-surface interactions; polarization fatigue;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
Type :
conf
DOI :
10.1109/CEIDP.2013.6748296
Filename :
6748296
Link To Document :
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