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GCB hvdc Vacuum Charging

Energies | Free Full-Text | Electrical Detection of ... PTFE and epoxy resin samples surfaces were polished with sandpaper of 800 grit gradually increasing up to 7000 grit size. The silicone rubber samples were vacuum casted using a highly polished stainless-steel mold, followed by at least 24 h curing at 50 ∘ C. For all cases, arithmetical mean height R a is maintained between 0.6–0.8 μ m.

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