Du Yue-fan, Lv Yu-zhen, Zhou Jian-quan, Chen Mu-tian, Lian Xiao-xin, Li Cheng-rong
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Effect of Ageing on Insulating Property of Mineral Oil-based TiO2 Nanofluids
A class of mineral oil-based nanofluid has been developed by modifying mineral oil with TiO2 nanoparticle to enhance their dielectric performance. In this paper, we present the investigation results of aged nanofluids, which have been subjected to accelerated aging condition of 130°C for 6 days. Both AC breakdown voltage and PDIV tests were carried out according to ASTM standards respectively. It was found that AC breakdown voltage of nanofluids has been largely improved before and after aging 6 days. The mean value of PDIV in aged nanofluid achieves an increase of 1.16 times than that of mineral oil. In addition, the results of statistical data indicate that 1% probability breakdown voltage of nanofluid is 78.34kV, which is 8kV higher than that of mineral oil. The experimental results demonstrated that both breakdown voltage and PDIV of mineral oil can be significantly improved by modifying with TiO2 nanoparticles.
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