Caractérisation diélectrique de nanocomposites LLDPE/nano-glaises : fidélité des techniques et propriétés électriques

Abstract

In order to answer the energetic needs of the future, insulation, which is the central piece of high voltage equipment, has to be reinvented. Nanodielectrics seem to be the promise of a mayor technological breakthrough. Based on nanocomposites with a linear low density polyethylene matrix reinforced by nano-clays and manufactured from a commercial master batch, the present thesis aims to characterise the accuracy of measurement techniques applied on nanodielectrics and also the dielectric properties of these materials. Thus, dielectric spectroscopy accuracy both in frequency and time domain is analysed with a specific emphasis on the impact of gold sputtering of the samples and on the measurements transposition from time domain to frequency domain. Also, when measuring dielectric strength, the significant role of surrounding medium and sample thickness on the variation of the

Date	6 Jul 2012
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Éric David (Supervisor) & Michel F. Fréchette (Co-supervisor)