Influence of environment humidity on properties of FEP, PTFE, PCTFE and PI film electrets

A literature review on space-charge electrets, covering the time period 1987 to 1996, is presented. The review starts out with a discussion of new inorganic and organic electret materials which also includes silicon based single and double layers. This is followed by a review of recent work on methods for measuring charge distributions. New results obtained with these methods on a number of differently charged materials are surveyed, together with data for charge transport and charge decay. Of particular significance is the superb charge storage capability of silicon dioxide/silicon nitride double layers which was discovered only very recently. The review closes with a survey of new, or improved electret applications.

show abstract

Charge distribution and transport in polymers

Sessler¹

1997

IEEE Trans. Dielect. Electr. Insul.

122

View full text Add to dashboard Cite

Experimental work on charge distributions and charge transport in polymer films is reviewed. For studying the charge distributions in the thickness dimension, thermal or acoustic techniques are used with resolutions down to N 1 pm. The polymer samples usually are charged with corona, electron beam or thermal methods. Observation of the change of charge and polarization distributions with time allows one to draw conclusions about charge transport and charge injection phenomena. In some cases theoretical models have been established, based on excess-charge drift due to a finite carrier mobility and on charge compensation due to intrinsic or radiation-induced conductivity Other models are concerned with the interaction of injected or intrinsic space charge with a dipole polarization. Comparisons of measured and calculated charge distributions and their change with time show the applicability of these models and shed new light on charge trapping and charge transport phenomena.

show abstract

Influence of environment humidity on properties of FEP, PTFE, PCTFE and PI film electrets

Cited by 4 publications

References 7 publications

Research of space charge in solid dielectrics in China

Research of space charge in solid dielectrics in China

Space-charge electrets

Charge distribution and transport in polymers

Contact Info

Product

Resources

About