From beverage waste to electrical withstand: crystal-phase-controlled recycled alumina nanofillers for surface charge regulation in HVDC epoxy spacers
Epoxy spacers in gas-insulated substations (GIS) and transmission lines (GITL) accumulate surface charge under HVDC stress, distorting the electric field and lowering flashover voltage. Here, γ-rich alumina and α-Al2O3 nanofillers were synthesized from recycled aluminum beverage cans through acid dissolution, carbonate...