In this paper

a formula of porcelain silicone rubber composite which can make ceramic insulating layer protection cover on metal wire was studied. The ceramic temperature of material was 600℃ which was substantially lower than the current temperature as reported in the literature. By experiments investigated the influence of the substance dosage formulation on the material properties

got the optimal experimental formula composed of:alumina 10 parts

15 parts of wollastonite and 15 parts of constitution controller A

lithium carbonate 3 parts. Under this condition the tensile strength was up to 10.79MPa

and the elongation at break was up to 316%

the compressive strength of 600℃ and 800℃ ablation residue were 3.47MPa and 10.13MPa

the volume resistivity was 134×10

12

Ω·cm. The volume resistivity of its ablation residues was over than 28×10

13

Ω·cm

and met the requirements as porcelain insulating material. The material properties were characterized by SEM analysis and thermogravimetric analysis. The results of thermogravimetric analysis show that the weight loss of the sample is reduced by 39.4% and the ablation residual rate is greatly improved. The results of SEM analysis show that sample structure is dense.