Electrical Insulation and Mechanical Properties of Epoxy/Micro-silica (MS)/Micro-alumina (MA) Composites
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Effect of mixture ratio of micro-silica (MS) and micro-alumina (MA) on the electrical insulation and mechanical properties of epoxy composites was investigated in order to develop a new insulation material for high voltage gas insulated switchgears. The mixing ratio of inorganic filler to epoxy resin was fixed to 70 wt%, and the mixture ratio of MS and MA in inorganic filler was 10:0, 9:1, 7:3, 5:5, 3:7, 1:9, and 0:10, respectively. Insulation breakdown strength increased with increasing MS content, however it did not follow the mixture rule of composite showing synergy effect. Those values for neat epoxy, epoxy/MS (70 wt%), and epoxy/MA (70 wt%) were 44.5, 53.4 and 47.1 kV/2 mm, respectively. Tensile strength and flexural strength were measured using a universal testing machine at a crosshead speed of 10 mm/min, and they also increased with increasing MS content, while they did not follow the mixture rule of composite.
KeywordsInsulation breakdown strength Tensile strength Flexural strength Epoxy/micro-silica/micro-alumina composite Weibull statistical analysis
- 1.CAPIEL, Switchgear and SF6 Gas, CAPIEL HV-ESDD1-R1-1.02 (2002)Google Scholar
- 2.N. Bernard, S. Theoleyre, G. Valentin, in 16th International Conference and Exhibition on Electricity Distribution, Amsterdam, Netherlands (IEE Conf. Publ No. 482, CIRED, 2001)Google Scholar
- 6.M. Ehsani, Z. Farhadinejad, S. Moemen-bellah, S.M. Bagher alavi, M.M.S. Shrazi, H. Borsi, in 26th Internal Power System Conference, Tehran, Iran, 11-E-CAM-2359 (2011)Google Scholar
- 9.T. Imai, F. Sawa, T. Yoshimitsu, T. Ozaki, T. Shimizu, in Annual Report Conference on CEIDP (2004), p. 402Google Scholar