As it is highly probable that pellets will have a higher degree of air gaps and voids than thin films, is it possible to pole the samples with corona poling nevertheless? Or is there the possibility to induce partial discharges within the pores?
Hi,
It is equally likely that one can get voids in thin films as well as pellets depending upon what process was used to make them and how meticulously it was followed. Now the polling part is concerned, it can be done on both the types. The occurrence of the discharge is exclusively dependent upon the thickness of the material used and the applied potential. Assuming these are taken into consideration, if voids are minimum in whichever form of material that is employed, poling can be successfully done. One has to optimize all these parameters whilst taking into account the dielectric breakdown of the sample material.
Regards
Amit
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