On the Electric Breakdown Behavior of Silicone Gel at Interfaces

Self-healing during electrical treeing: A feature of the two-phase liquid-solid nature of silicone gels

“…[5,[7][8][9][10][28][29][30]). However the behaviour of gels has received little attention [2][3][4]. The data obtained here indicates that the Low Molecular Weight (LMW) liquid content of the samples is instrumental in determining the structure and behaviour of the electrical trees in the gel samples whereas in the silicone rubber elastomer the flexibility of the 3D matrix becomes important.…”

“…The special feature of a gel is that when cured it retains much of the stress relief and self-healing qualities of a liquid while providing the dimensional stability of a cross-linked elastomer. Their physical and electrical stability is maintained over a wider temperature range (-45°C to 200°C) than other polymers [1][2][3].…”

“…The self-healing capability of silicone gels is of some importance in high voltage (HV) applications where partial selfhealing has been observed when the gel was subjected to partial discharges (PDs) [2][3][4]. In a solid polymer, a cavity resulting from PDs will be a permanent defect and usually will propagate and grow as a fractal or tree structure leading eventually to failure.…”

Electrical trees in silicone gel: A combination of liquid and solid behaviour patterns

“…The semi-liquid, semi-solid, structure of a silicone gel means that both of these features will be expected when it is exposed to fields high enough to cause electrical tree formation. Although self-healing behaviour in high voltage applications has been indicated in previous work [3,4] it was not the focus of the work. Here we concentrate on demonstrating its existence in electrical treeing experiments and elucidating its general features through an analysis of the time decay of the cavities generated due to electrical tree/streamer propagation across the gel matrix.…”

Генерация Импульсно-Периодической Последовательности Наносекундных Искровых Разрядов В Воздушном Промежутке Между Прозрачными Гидрогелевыми Электродами

“…В настоящей работе впервые описаны эксперименты, в которых продемонстрирован импульсно-периодический искровой разряд между электродами, изготовленными из гидрогеля, насыщенного соленой водой. Отметим, что ранее гели использовались в исследованиях разрядов в качестве плазмообразующего изолятора [14,15], однако исследований электрических разрядов с гелевым электродами прежде не проводилось.…”