Performance evaluation of thermally aged ATH and BN co‐doped silicone rubber nano‐micro composites for power cable applications

Abstract

Power cables are intended to operate at high temperatures over a long period which may change the performance of silicone rubber insulation used in high voltage cable accessories. Therefore, in the current study, to enhance the properties of silicone rubber, alumina try‐hydrate (ATH) and boron nitride (BN) micro and nanoparticles were added to the silicone rubber matrix. The synthesized undoped silicone rubber, silicone rubber with 40 wt% micro ATH, 7 wt% nano BN, and 10 wt% micro ATH + 5 wt% nano BN composites were thermally aged for 600 h at 180ºC. The composite properties were analyzed through electrical, thermal, and physicochemical techniques. To assess the electrical characteristics, water droplet‐initiated corona discharge studies as per IEC 60112 were conducted and leakage current, corona inception voltage, and erosion resistance were evaluated. A deep learning technique also was employed for the prediction of erosion resistance of the samples. Further, to examine the surface texture and chemical changes on the surface of the material, 3‐D microscopy and Fourier transform infrared spectroscopy (FTIR) was adopted. Finally, thermal distribution analysis was performed for all the composites by infrared thermography. The results demonstrated the suitability of nano‐micro co‐doped composites over nanocomposites and micro composites for power cable applications.

Boron Nitride/Carbon Fiber High-Oriented Thermal Conductivity Material with Leaves–Branches Structure

“…Therefore, this shift imposes greater demands on the thermal conductivity capabilities of thermal interface materials (TIMs) [3][4][5][6]. Silicone rubber (SIR) is widely selected as the matrix material for TIMs due to its wide viscosity range, adjustable hardness, high insulation, good filler compatibility, and excellent reliability [7][8][9]. Compared with polyurethane, acrylic acid, and epoxy resin, SIR has better filling ability and reliability with respect to thermally conductive particles.…”

Enhanced mechanical, thermal, and erosion resistance properties via the synergetic effect of n-ATH/LMGP added ceramifiable silicone rubber composites for electrical insulation

“…The inclusion of high thermal conductive fillers such as boron nitride (BN) [3], ATH [4], alumina (Al2O3) [5], or alumina nitride (AlN) [6,7] in silicone rubber matrix leads to reduce the local hot spot by increasing the thermal conductivity of the overall polymer matrix and thus higher resistance to erosion could be achieved [8,9]. Traditionally, micro ATH is filled with silicone rubber to increase the flame retardancy and antitracking properties [10]. Yet it is necessary to fill an extent amount of micro-ATH to obtain satisfactory tracking and erosion resistance which leads to low mechanical performance [11].…”

Effect of polydiborosiloxane on the mechanical properties of silicone rubber foam with dual network structure

“…[3][4][5][6][7] Silicone rubber foam, as a kind of porous fixable material, 8,9 not only exhibits the advantages of silicone rubber, but also have light weight, heat insulation, sound insulation, energy absorption, and shock resistance. [10][11][12] Therefore, silicone foam material is widely used in electromagnetic shielding, 13 flexible tactile sensor, 14 aerospace industry, 15 and other aspects. 16,17 In recent years, the silicone foam with highly efficient energy absorption has become important in the field of impact resistance and injury protection.…”