Investigation on Electrical, Thermal, and Mechanical Properties of Silicone Rubber ATH Nanocomposites

Abstract

In the present study, investigations have been carried out by choosing the nano-sized ATH (30 -50 nm) particles as filler content in silicone rubber to acquire a deep insight to understand the use of nano ATH fillers in silicone rubber on its performance, to use it as insulation structure as an outdoor insulator. Variation in the surface condition of silicone rubber nanocomposites due to corona aging and the recovery characteristics analysis carried out through contact angle measurement. Nano ATH added in silicone rubber, up to 3 wt% of filler, shows increased dielectric constant with less loss factor. Water droplet-initiated discharges on silicone rubber nano ATH composites under DC voltage measured using UHF technique and the damage caused zone analyzed through AFM studies and by surface potential measurement, which indicates higher surface roughness and increased charge trap depth. It is observed that negative DC voltage has higher CIV followed by positive DC and AC voltage. Laser Induced breakdown studies (LIBS) show a direct correlation between plasma temperature and material surface hardness. Also, on laser shining on the surface of the specimen, its temperature was measured on the backside of the specimen through thermal imaging confirming increased diffusivity of temperature. Laser flash analysis shows a direct correlation between filler content in base polymer and thermal conductivity and diffusivity. Higher storage modulus and activation energies measured from the dynamic mechanical analysis indicate the significance of prepared composites as an excellent mechanical support structure for the power system network.

Electromagnetic shielding effectiveness of silver‐coated hollow glass microsphere‐graded short carbon fiber epoxy composite

“…A pulse energy of 30 mJ of 200 pulses is applied at the front side of the samples, which produces molecular vibration and breaks the atomic bonds of the epoxy‐based sample. This generates heat and is captured from the rear side of the sample using a handheld forward looking infrared (FLIR) camera 14 . The dimensions of the samples are 30 × 30 mm 2 .…”

“…This generates heat and is captured from the rear side of the sample using a handheld forward looking infrared (FLIR) camera. 14 The dimensions of the samples are 30 Â 30 mm 2 . Additionally, a laser flash analysis test is performed to determine the thermal conductivity of the fabricated samples.…”

Investigation on the Surface Condition of Gamma Irradiated Silicone Rubber Micro-Nanocomposites

“…The experimental setup for measuring water droplet initiated corona inception voltage is shown in Fig 1 . It includes a signal generator (Tektronix 3051C), a high voltage amplifier (Trek type 20/20 C), and stainless-steel electrodes with a 45 • cut at the tip, as per IEC 60112. The complete procedure for measuring for CIV is explained in the previous study [35].…”

Surface Charge Dissipation Characteristics of Al₂O₃/Silicone Rubber Composites With Different Weight Percentages

“…Their research revealed that the introduction of nanosized ATH improved the interface region between the matrix and the filler. This interface region provided a free pathway for charge carriers to transport into the material's interior [7]. Z. P. Yan et al applied both nano and micron-sized SiO2 coatings to the surface of silicone rubber, resulting in silicone rubber composites with superhydrophobic properties.…”