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Polymer-based insulators offer major benefits as compared to customary insulators. In the current research, efforts are conducted to enumerate the effect of µATH (Micro Aluminum Trihydrate) and nSiO 2  (Nano silicon Di-oxide) fillers loading on to electrical, mechanical, thermal, and tracking resistance properties of Silicone Rubber-RTV/µATH@nSiO 2  micro/nano composites for high voltage insulation. The UV-vis and FESEM characterizations were conducted to see the optical behavior and uniform dispersion of all fillers into base material before and after mixing. The prepared composites A, B, and C with wt.% concentrations of the 100% Silicone rubber, (15 wt.%µATH@Silicone rubber), and (15 wt.% µATH@nSiO 2 @Silicone rubber )  respectively were tested for electrical, mechanical, thermal, and tracking resistance properties measurements. The characterization result for all samples A, B, and C indicates that all micro and nanocomposites had high voltage insulation characteristics with the loading of micro and nanofillers in pure silicone rubber. Silicone rubber was been mixed with varying concentrations of (15 wt.%µATH@Silicone rubber) and (15 wt.% µATH@nSiO 2 @silicone rubber )  by using a roll milling sulfur cure system. The outcome that arises from the present research highlighted that the dielectric breakdown has increased with micro and nanofiller loadings which are about 120KV, 179KV, and 190KV for samples A, B, and C correspondingly. Similarly, the surface resistivity was noticed (3.3 × 10 14,  5.5 × 10 14,  and 8.4 × 10 14 ) Ω/Square for all three samples A, B, and C sequentially. Also, the volume resistivity was been recorded as (1.14 × 10 14,  4.5 × 10 14,  and 9.8 × 10 14 ) Ω-cm-Square for all three samples accordingly. Based on all experimental results, it has been concluded that sample C with nSiO 2  fillers loadings showed improved electrical, mechanical, thermal, and tracking resistance properties as compares to other samples and suitable for high voltage outdoor applications.

Characteristics investigation of silicone rubber-based RTV/µATH@nSiO 2 micro/nano composites for outdoor high voltage insulation