Formula of silicone rubber material for composite insulator in power system

The formula of silicone rubber materials for the composite insulator used in power system were investigated,and a reasonable components ratio was found.The results showed that the tensile strength of the material could reach above 4.0 MPa at 30-40 phr silica per 100 phr silicone rubber,and the tracking resistance and erosion mass loss could achieve grade 1 A 4.5 and below 0.04%,respectively,at 90-120 phr aluminium hydroxide per 100 phr silicone rubber.Meanwhile,it was only when the amount of vulcanizator 2,5-dimethyl-2,5-bis(tertiary butyl-peroxy) hexane ranged between 1.5 phr to 2.5 phr that the silicon rubber could be ensured to be vulcanized completely.The insulating materials with better all round properties could be obtained from the silicon rubber compounds which were prepared by keeping both the heat resistant additive Fe2O3 and the structurized control agent hydroxyl silicone oil at 4-6 phr.