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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.8 P.923~927

http://doi.org/10.1631/jzus.2004.0923


Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets


Author(s):  CHEN Gang-jin, XIAO Hui-ming, ZHU Chun-feng

Affiliation(s):  Institute of Functional Material Research, Zhejiang University of Science and Technology, Hangzhou 310027, China

Corresponding email(s):   cgjin@zust.edu.cn

Key Words:  Polymer electrets, Charge dynamics, Material microstructure


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CHEN Gang-jin, XIAO Hui-ming, ZHU Chun-feng. Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets[J]. Journal of Zhejiang University Science A, 2004, 5(8): 923~927.

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%A XIAO Hui-ming
%A ZHU Chun-feng
%J Journal of Zhejiang University SCIENCE A
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T1 - Charge dynamic characteristics in corona-charged polytetrafluoroethylene film electrets
A1 - CHEN Gang-jin
A1 - XIAO Hui-ming
A1 - ZHU Chun-feng
J0 - Journal of Zhejiang University Science A
VL - 5
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SP - 923
EP - 927
%@ 1869-1951
Y1 - 2004
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2004.0923


Abstract: 
In this work, the charge dynamics characteristics of injection, transport and decay in porous and non-porous polytetrafluoroethylene (PTFE) film electrets were investigated by means of corona charging, isothermal and thermal stimulating surface-potential decay measurements. The results showed that the initial surface potential, whether positively or negatively charging, is much higher in non-porous PTFE than in porous PTFE. For porous film the value of initial surface potentials increases with increase of film thickness. Higher charging temperature can remarkably improve charge stability. The charge dynamics are correlated to materials microstructure according to their scanning electron micrographs. For non-porous PTFE films, polarizability change of C-F bonds is the main origin of electret charges; but for porous PTFE film a large number of bulk and interface type traps are expected because of the greater area of interface and higher crystallinity.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[3] Gerhard-Multhaupt, R., Künstler, W., Görne, T., Weinhold, T., Seiß, M., Xia, Z.F., Wedel, A., Danz, R., 2000. Porous PTFE Space-charge electrets for Piezoelectric Applications. IEEE Trans. Electr. Insul., 7(4):480-488.

[4] Hilczer, B., Malecki, J., 1986. Electrets. PWN-Polish Scientific Publisher, Amsterdam, p.166.

[5] Hillenbrand, J., Sessler, G.M., 2000. Space-charge electrets. IEEE Trans. Electr. Insul., 7(4):537-542.

[6] Kressmann, R., Sessler, G.M., Günther, P., 1996. Space-charge electrets. IEEE Trans. Electr. Insul., 3(5):607-623.

[7] Schwödiauer, R., Neugschwandtner, G.S., Schrattbauer, K., Lindner, M., Vieytes, M., Bauer-Gogonea, S., Bauer, S., 2000. Preparation and characterization of novelpiezoelectric and pyroelectric polymer electret. IEEE Trans. Electr. Insul., 7(4):578-586.

[8] Sessler, G.M., Yang, G.M., 1996. Evolution of Charge Distributions in Polymers during Annealing. 9th Intern. Symp. Electrets. Shanghai, China, p.165-170.

[9] Winstle, H., 1973. Introduction to electrets. J. Acoust. Soc. Am., 52:1578-1588.

[10] Xia, Z.F., Wedel, A., Danz, R., 1999. The Excellent Charge Storage Stability of Porous Polytetrafluoroethylene (PTFE) Film Electrets. 10th Intern. Symp. Electrets. IEEE Service Center, Piscataway, p.23-26.

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T. Yovcheva@Assoc. prof. Dr<temiov@uni-plovdiv.bg>

2010-10-25 02:20:56

I am interested in voided polymer films. Please, send me full text of this paper. It will be vwry intwrwsting for my work in the Plovdiv University, Bulgaria

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