Surface Potential Decay on LDPE and LDPE/Al2O3 Nano-Composites: Measurements and Modeling
Artikel i vetenskaplig tidskrift, 2016

Surface potential decay on LDPE and LDPE/Al2O3 nano-composite films charged by positive corona was studied. Potential distributions and decay on charged samples were measured using non-contact technique under ambient conditions. Results show that addition of 3 wt% of Al2O3 nano-filler drastically slows down the decay process, confirming this way modification of the charge transport process. The obtained decay characteristics are analyzed by considering various decay models, based on intrinsic conduction, dielectric polarization, surface charge de-trapping as well as charge injection and its transport. Applicability of the first three models is analyzed in terms of derived quantities such as material conductivity, potential decay rate and trap density distribution whereas the latter one is examined by means of computer simulations. Among the studied models, the ones based on dielectric polarization and charge transport model provide best fits to potential decay characteristics.

nano-dielectrics

dielectric polarization

charge transport

de-trapping

mobility.

conduction

Polyethylene

trap density

surface charge

Författare

Sarath Kumara

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Yuriy Serdyuk

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Stanislaw Gubanski

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN)

Vol. 23 6 3466-3475

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialteknik

Elektroteknik och elektronik

Annan elektroteknik och elektronik

Styrkeområden

Energi

Materialvetenskap

DOI

10.1109/TDEI.2016.005663