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Transient phenomena of current and field distortion due to dynamics of packet‐like charges in LDPE films
Author(s) -
Yoshioka Hirokazu,
Kadowaki Kazunori,
Kitani Isamu
Publication year - 2012
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.21256
Subject(s) - low density polyethylene , space charge , anode , materials science , electrometer , cathode , current (fluid) , transient (computer programming) , distortion (music) , analytical chemistry (journal) , electrode , electrical engineering , condensed matter physics , composite material , polyethylene , chemistry , optoelectronics , physics , engineering , electron , amplifier , chromatography , quantum mechanics , cmos , computer science , operating system
Abstract Simultaneous measurements of space charge and external current were carried out using a PEA measurement system with an electrometer on the back of a grounding electrode in order to clarify the physical situation of a huge packet of positive space charges in LDPE films. A large number of positive charges from a semiconducting anode were accumulated at the interface between LDPE and an Al‐cathode at a mean applied field of 1.5 MV/cm and then finally disappeared. The results of simultaneous measurements showed that the external current kept a relatively high value during charge accumulation and further increased when the charges disappeared. Both the charge dynamics and the external current were restricted by addition of a low‐molecular‐weight paraffin wax, indicating that carrier transport was influenced by the microstructure of the polymer. The dynamics of the residual charges after short‐circuiting is also discussed. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 179(4): 10–17, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21256