Abstract
Silicone rubber filled with nano-filler was prepared in laboratory-scale for outdoor insulators. Specimen preparation and property estimation were done to improve various properties of silicone rubber by mixing small amount of nano-fillers. This paper deals with the influence of particle type, particle size and dispersibility on various surface properties of silicone rubber filled with nano-scale aluminum hydroxide. Boehmite alumina (AlOOH) and alumina trihydrate (ATH) are used as nano-filler and micro-filler, respectively. Specimens were originally prepared using three kinds of mixing machines such as a planetary mixer, a triple roll mill, and a high-pressure-type mixer. Dispersion state of the fillers was analyzed with a scanning electron microscope (SEM). Hydrophobicity characteristics and tracking characteristics of the specimens were evaluated with a developed artificial acceleration pollution aging test system (AAPATS) and IEC-60112, respectively.
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