The AC non linear permittivity characteristics of barium titanate filled acrylic resin

The high field conductivity properties of resins and polymers can be changed through the inclusion of appropriate fillers into the polymer matrix. Addition of ceramic ferroelectric fillers, such as barium titanate, lead titanate and lead zirconium titanate allow the dielectric to have a permittivity which increases with electric field strength, through a process of spontaneous domain alignment within the filler crystal. This paper studies the AC high field conductivity characteristics of barium titanate filled acrylic resin and how the properties are enhanced at increased concentration levels. The effects of temperature, cure time and post curing at elevated temperatures are also investigated with their significance on the non-linear conduction characteristics.