Title :
Piezoelectric polytetrafluoroethylene films with void structure
Author :
Zhang, X. ; Wang, X. ; Cao, G. ; Pan, D. ; Xia, Z.
Author_Institution :
Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China
Abstract :
Polytetrafluoroethylene (PTFE) films with a void structure are prepared by the sintering process. Such void PTFE films are piezoelectric after proper corona charging. The quasi-static piezoelectric d33 coefficients up to 250 pC/N are obtained. Pre-ageing treatment is an effective method to further improve the thermal stability. For the samples with pre-ageing treatment, the the d33 coefficients are very stable when exposed to 120degC. The values of d33 are slightly applied pressure dependent in the range of 50 kPa.
Keywords :
ageing; corona; piezoelectric thin films; polymer films; sintering; thermal stability; voids (solid); PTFE films; corona charging; piezoelectric polytetrafluoroethylene films; quasi-static piezoelectric coefficients; sintering process; thermal stability; treatment; void structure; Corona; Dielectric materials; Electrets; Electrodes; Ferroelectric materials; Piezoelectric films; Piezoelectric materials; Plastic films; Polymer foams; Temperature; electret; piezoelectret; piezoelectricity; polytetrafluoroethylene;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252280
