By Topic

Poling kinetics in polar amorphous polymers containing space charge

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
A. S. DeReggi ; Polymers Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA ; J. A. Giacometti

Polar amorphous polymers available in sheets are readily made into planar capacitors with parallel thin film electrodes on opposite surfaces. They may be poled in this form using a process called thermopoling where a specimen is heated to a temperature near its glass transition temperature T, a voltage V is applied across the electrodes, and the specimen is cooled below T before V is removed. In the s absence of space charge, the electric field E in the specimen of thickness d is homogeneous and has the initial value V/d. The electric polarization P induced by thermopoling is then homogeneous. In practice, however, space charge is almost always present during poling. This charge may be pre-existing or be injected during poling and its mobility may be strongly dependent on temperature. The volume-density of space charge p may then vary spatially and temporally during poling and the resulting E and P no longer can be homogeneous. In those cases, poling kinetics are important in establishing the final polarization distribution P(x). In this paper, we develop mathematical relations among the spatially and/or temporally varying quantities v(t), E(x,t), and p(x,t) where x is a coordinate measuring distance from the initially positive electrode and t is the time

Published in:

Electrical Insulation and Dielectric Phenomena, 1994., IEEE 1994 Annual Report., Conference on

Date of Conference:

23-26 Oct 1994