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Robust measurements of electric conductivity in polyethylene based materials: measurement setup, data processing and impact of sample preparation

Xiangdong Xu (Institutionen för elektroteknik, Elkraftteknik) ; Mattias Karlsson ; Karolina Gaska (Institutionen för elektroteknik, Elkraftteknik) ; Stanislaw Gubanski (Institutionen för elektroteknik, Elkraftteknik) ; Henrik Hillborg ; Ulf Gedde
25th Nordic Insulation Symposium on Materials, Components and Diagnostics (2017)
[Konferensbidrag, refereegranskat]

In this work, a measurement setup and an algorithm are introduced that allow for obtaining and processing the current data during standard measurements of electric conductivity in polymeric insulation materials. Robustness of this setup is demonstrated through dc conductivity measurements of low density polyethylene (LDPE) specimens that were prepared by two different techniques, i.e. compression molding and extrusion, at two independent laboratories (at Chalmers and KTH) from the same raw pellets. The results resented in this paper reveal that the implemented data processing algorithm allows for clear separation of the conduction current level and the external noise and thus for good differentiation between the conductivity levels in the investigated material specimens. In addition, a high reproducibility of the results is obtained for the independently manufactured specimens, suggesting the proposed measurement technique is well suitable for characterization of low conducting dielectrics.



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Denna post skapades 2017-06-21. Senast ändrad 2017-11-29.
CPL Pubid: 250021

 

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