Figure 28.
(a) Evolution of PD erosion depth with aging time of unfilled XLPE, XLPE with 5 wt % unfunctionalized nanoSiO2 and XLPE with 5 wt % chemical agent functionalized nanoSiO2 and (b) erosion speed for these kinds of XLPE (© 2016 IEEE. Reprinted, with permission, from [24]).