TITLE

Dielectric characteristics of poly(ether ketone ketone) for high temperature capacitive energy storage

AUTHOR(S)
Pan, Jilin; Kun Li; Junjun Li; Tim Hsu; Qing Wang
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p022902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The dielectric constant and loss of poly(ether ketone ketone) have been investigated over a range of frequency and temperature. A linear correlation between the ac conductance and the angular frequency implies that the hopping as a dominant conduction process contributes to the dielectric loss. The energy density and discharged efficiency of the polymer were measured at various temperatures. High dielectric strengths (>400 MV/m) at temperatures up to 150 °C have been achieved. The increase of the dielectric loss and reduction in the breakdown field with increasing temperature could be attributed to thermally enhanced conduction of charge carriers in the polymer.
ACCESSION #
43277392

 

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