Nanodielectrics for Cryogenic Applications

Electrical properties of a polymeric nanocomposite with in-situ synthesized nanoparticles

“…Nanodielectrics, which are composed of inorganic nanoparticles dispersed in polymeric matrices, have been shown to possess desirable electrical properties for electrical insulation and high voltage applications [1]- [8]. The desirable properties can be listed as high dielectric strength (design breakdown strength), low permittivity, partial discharge resistance, thermal stability, mechanical strength, durability, etc.…”

Epoxy nanodielectrics fabricated within situandex situtechniques

“…These new materials have potential for fusion energy and low-temperature power applications, where superconducting wires are employed, since the number of commercially available structural composites with good electrical insulation properties are few [7,8]. In conventional polymeric composites for electrical insulation, addition of micrometre size particles degrade dielectric performance of the insulation compared to unfilled polymer.…”

“…In conventional polymeric composites for electrical insulation, addition of micrometre size particles degrade dielectric performance of the insulation compared to unfilled polymer. However, no degradation in electrical properties, such as dielectric breakdown, with respect to time and electrical aging of electrical insulation properties has been observed in nanodielectrics for conventional applications [1] and for cryogenic applications [3,[8][9][10]. Although it is clear that nanoparticles influence the dielectric performance, yet no detailed analysis has been performed on the particle size to breakdown strength statistics.…”

“…Better electrical insulation materials with improved thermal and mechanical properties, without concomitant degradation of dielectric and electrical insulation properties, are needed for energy transmission and distribution and power applications, especially in electrical insulation for cryogenic applications [7,8]. Here, we focus on a commercial cryogenic resin and fabricate a nanocomposites using in situ and ex situ synthesis methods.…”

“…To produce well-dispersed particles or to improve the dispersion, twin-screw extruders and high-power horn sonicators are employed for polymers with no-volatile content and within diluted solutions, respectively. Later, due to problems experienced in this ex situ approach (particles were not mixed uniformly), other methods were developed based on nanoparticle synthesis and in situ particle precipitation procedures [3,8,[13][14][15] -in situ nanoparticle synthesised polymeric nanocomposites [3,9].…”