Electrical conductivity and electret stability. Why electrets are so stable?

Author

Malecki, Jerzy

Author_Institution

Inst. of Molecular Phys., Polish Acad. of Sci., Poznan, Poland

fYear

1996

fDate

25-30 Sep 1996

Firstpage

110

Lastpage

116

Abstract

The processes causing a very strong decrease in electrical conductivity after charging the polymer foils are considered. The relation between the shape of electret from and its stability is also discussed. The main reason why the electrical conductivity measured under a strong, static electric field is much lower in comparison with the low field conductivity, is a competition between the rate of the carriers generation in the thermal activation processes and the rate of carriers captured on electrodes and by free charge present in an electret. Eventually the excess charge enter the conduction band causing a decrease of electrical conductivity by a few orders of magnitude

Keywords

conduction bands; electrets; electrical conductivity; electron traps; foils; high field effects; insulating thin films; organic insulating materials; polymer films; surface charging; carrier capture; carrier generation; charging; conduction band; electret stability; electrical conductivity; electrodes; excess charge; free charge; low field conductivity; polymer foils; strong static electric field; thermal activation processes; Charge measurement; Conductivity measurement; Current measurement; Electrets; Electric variables measurement; Electrodes; Polymers; Shape; Stability; Thermal conductivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1996. (ISE 9), 9th International Symposium on

Conference_Location

Shanghai

Print_ISBN

0-7803-2695-4

Type

conf

DOI

10.1109/ISE.1996.578054

Filename

578054