Title :
Nuclear magnetic resonance imaging of electrical trees in PE
Author :
Weigand, F. ; Spiess, H.W. ; Blumich, B. ; Salge, G. ; Moller, K.
Author_Institution :
Max-Planck-Inst. fur Polymerforschung, Mainz, Germany
fDate :
6/1/1997 12:00:00 AM
Abstract :
Test samples of LDPE (low-density polyethylene) were electrically aged until PD (partial discharge) and electrical treeing occurred. Investigations on the spatial distribution of microscopic domain sizes in the lamellar morphology of the samples were carried out applying a novel method of proton NMR imaging which probes magnetization transfer by spin diffusion. Spatial changes of LDPE morphology are detected due to the appearance of PD
Keywords :
NMR imaging; ageing; partial discharges; polyethylene insulation; trees (electrical); LDPE; domain size; electrical ageing; electrical tree; lamellar morphology; low-density polyethylene; magnetization transfer; partial discharge; proton NMR imaging; spin diffusion; Aging; Magnetic force microscopy; Magnetic resonance imaging; Magnetization; Morphology; Partial discharges; Polyethylene; Probes; Protons; Testing;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
