| Title |
Research on AC Tracking Resistance of Silicone Rubber/BN Microcomposites |
| Authors |
변영훈(Younghun Byeon) ; 전영택(Youngtaek Jeon) ; 김명진(Myungchin Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.11.1389 |
| Keywords |
SiR/BN Composites. Trackinng Resistance; Thermal Conductivity; Thermal Stability; Surface Contact Angle |
| Abstract |
Surcace tracking resistance is an essential characteristic that determines the performance of insulation materials for outdoor applications. In this research, the tracking resistance of boron nitride (BN) filled silicone rubber (SiR) composites were evaluated based on tracking time comparison from inclined plane test (IPT). SiR/BN composites with BN loadings of 0, 3, 5, 10 and 20 wt% were manufactured and it was shown that improvement in tracking resistance is achieved by increasing the loadings of BN particles.
Considering that tracking resistance is affected by various materials properties such as heat conducitivity, thermal stability and hydrophobicity, the effect of different BN loadings to the material properties of SiR/BN composite were studied by thermal simulation, thermo-gravimetric analysis (TGA) and surface contacnt angle (SCA) measurement. From analysis for such detailed material properties, it was shown that the additon of micro-sized BN particles contribute to increased level of thermal conductivity, thermal stability and SCA. Instead of direct measurements, in addition to evaluation of tracking resistance, a computational approach to predict thermal conductivity of composites was considered to study the effect of different BN loadings to SiR/BN composites.
The effectivenss of the applied prediction approach was studied by comparing prediction results with conventional models. |