Title :
Effects of low temperature on treeing Phenomena of silicone rubber/SiO2 nanocomposites
Author :
Du, B. ; Han, Trung ; Su, J.G.
Author_Institution :
Sch. of Electr. Eng. & Autom., Tianjin Univ., Tianjin, China
Abstract :
Silicone rubber (SiR) has been widely used in XLPE cable accessories because of its excellent electrical and mechanical properties. The electrical tree is a serious threat to SiR insulation and it can even cause the insulation breakdown. Addition of nanoparticles into SiR can improve the insulating properties compared with undoped material. The effect of nanoparticles on tree characteristics at temperatures above 0 °C has been widely researched. However, the effect under low temperature has not been researched. In this paper, electrical treeing process in SiR/SiO2 nanocomposites was investigated over a range of low temperatures. The samples were prepared by mixing nano-SiO2 into room temperature vulcanized (RTV) SiR, with the content of 0, 0.5, 1.0, 1.5 and 2.0 wt% respectively. The experiment temperature ranges from -30 °C to -90 °C. AC voltage with a frequency of 50 Hz was applied between a pair of needle-plate electrodes to initiate the electrical tree at different experiment temperatures. Both the tree structures and the growth characteristics were observed by using a digital microscope system. The experiment results indicated that low temperature is an important factors of the treeing process in SiR/SiO2 nanocomposites.
Keywords :
nanocomposites; silicon compounds; silicone rubber; silicone rubber insulators; trees (electrical); SiO2; electrical tree; frequency 50 Hz; insulating properties; low temperature effect; nanocomposite materials; needle plate electrodes; temperature -30 C to -90 C; treeing phenomena; vulcanized silicone rubber; Crystallization; Nanocomposites; Nanoparticles; Rubber; Temperature distribution;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2013 IEEE Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CEIDP.2013.6748339