Effect of silicone oxide nano particles on dielectric characteristics of natural ester

Transformer efficiency purely depends on integral functions of solid and liquid dielectric. A good dielectric should possess the following properties like; high breakdown strength, high thermal stability, chemical inertness, environmental friendly and good heat transfer capacity. Natural esters such as Corn Oil (CRO) and Coconut Oil (CO) are chosen based on the fatty acid compositions and considered to be the next generation heat transfer fluids. The SiO
₂
nanoparticles was attributed with good abrasion resistance, electrical insulation and high thermal stability: dispersed to the CRO and CO in various proportions. The properties like breakdown voltage, dissipation factor, dielectric constant, volume resistivity, viscosity, flash point, fire point, acidity and iodine values were measured according to IEC and ASTM standards. Astonishingly at elevated temperature the altered natural esters shows excellent insulating properties.