Characteristics on energy-absorption and outer insulation of semiconductor silicon rubber

The effect of thermal treatment on the thermal stability and energy-absorption of semiconductor silicon rubber resistance was studied. The experiments on the changes of hot and cool resistance, DTA&TG curves of semiconductor silicon rubber resistance before and after thermal treatment have been conducted. The result shows that semiconductor silicon rubber resistance after thermal treatment can get stable hot and cool resistance, and the thermal stability of semiconductor silicon rubber resistance may also increase in large scale. Impulse current generator was selected to conduct electric-thermal capacity and outer insulation test. The results show the damage phenomenon will become serious with the increase of energy, and the electric-thermal capacity is close to its pure thermal capacity. The outer insulation flashover field strength of rubber with RTV is 5.32 kV/cm that is nearly two times than that of rubber without RTV and is also close to that of pure silicon rubber.