Research & Development in Material Science

Impact of Alumina Trihydrate and Silica on Mechanical, Thermal and Electrical Properties of Silicone Rubber Composites for High Voltage Insulations

  • Open or Close Hidayatullah Khan1*, Muhammad Amin2, Ayaz Ahmad1 and Muhammad Yasin3

    1Department of Electrical Engineering, COMSATS Institute of Information Technology, Pakistan

    2Department of Electrical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Pakistan

    3Department of Electrical Engineering, National University of Sciences and Technology, Pakistan

    *Corresponding author: Hidayatullah Khan, Department of Electrical Engineering, COMSATS Institute of Information Technology, Wah Cantt, Punjab 47040, Pakistan, Email: hidayat.msk@gmail.com

Submission: November 07, 2017; Published: December 01, 2017

DOI: 10.31031/RDMS.2017.02.000540

ISSN: 2576-8840
Volume2 Issue3


In recent years, silicone rubber (SiR) based composites have been widely investigated for outdoor applications due to its promising insulating properties. However, mechanical, thermal and tracking properties of pure silicone rubber are very low, which restrains its application for long-term performance. In this research work, the influence of micro-sized alumina-tri-hydrate (ATH) and micro/nano-sized silica (SiO2) fillers on mechanical, thermal and electrical properties of room temperature vulcanized (RTV) SiR has been studied. SiR-blends with varying amounts of ATH and SiO2 particles were prepared, by following blending in a two roll mixing mill, compression moulding and post curing processes sequentially. In order to evaluate relative tracking and erosion resistance of SiR-blends, inclined plane test (IPT) was conducted in accordance with ASTM-D-2303 standard procedure. Surface temperature distribution was recorded using Fluke-Ti25 infrared (IR) camera during IPT experiments. Thermogravimetric analysis (TGA) was carried out to analyze thermal stability of ATH/SiO2 filled SiR Composites. Surface morphology, tensile strength, percent elongation at break (%EAB), hardness, erosion, tracking resistance and thermal properties were also investigated and discussed. Results showed that the mechanical, thermal and tracking/erosion performance of SiR-blends improves by the incorporation of ATH/silica particles, which is governed by filler type, size and wt% in polymer matrix.

Keywords: ATH; IPT; Characterization; SiR; SiO2

Get access to the full text of this article