This paper presents the results of the dielectric properties and partial discharge endurance measurements conducted on polypropylene (PP)-silica nanocomposite. The material compounds were analyzed with micro-Raman spectroscopy, X-ray tomography and transmission electron microscopy (TEM). ac and dc breakdown strength of the materials was measured. Dielectric response, capacitance and loss factor of the film samples were measured as a function of temperature and frequency. Partial discharge (PD) endurance of the reference PP and PP Silica nanocomposite was studied as a function of ac voltage. Material surfaces were analyzed after PD stress with optical microscopy. All dielectric measurements were done for oriented thin films with a thickness of 11-23 μm. The results were analyzed statistically to determine the effects of the additive on the properties of PP. The paper discusses the potential of PP Silica nanocomposite with a view to high voltage applications, especially power capacitors.
|Number of pages||9|
|Journal||IEEE Transactions on Dielectrics and Electrical Insulation|
|Publication status||Published - 2010|
|MoE publication type||A1 Journal article-refereed|
- dielectric properties
- partial discharge
Takala, M., Ranta, H., Nevalainen, P., Pakonen, P., Pelto, J., Karttunen, M., Virtanen, S., Koivu, V., Pettersson, M., Sonerud, B., & Kannus, K. (2010). Dielectric properties and partial discharge endurance of polypropylene-silica nanocomposite. IEEE Transactions on Dielectrics and Electrical Insulation, 17(4), 1259-1267. https://doi.org/10.1109/TDEI.2010.5539698