In this paper

experiments on the modified nozzle materials were done on the basis of analyzing nozzle ablation mechanism during the breaking of high voltage SF 6 circuit breaker. The variation regularities of the dielectric

optical

arc ablation behaviours and linear expansion factor have been achieved for the compound PTFE being made from adding MoS 2

BN and absorptiometric materials into pure PTFE. The results provide a theoretical basis for increasing the behaviour of the nozzle against the arc ablation and improving the dielectric property of nozzle materials.