Thermal characteristics of RTV silicone rubber coatings as a function of filler level

Author

Kim, Seog-Hyeon ; Cherney, Edward A. ; Hackam, Reuben

Author_Institution

Dept. of Electr. Eng., Windsor Univ., Ont., Canada

fYear

1992

Firstpage

713

Lastpage

718

Abstract

RTV (room-temperature vulcanizing) silicon rubber is investigated with various levels of alumina trihydrate (ATH) filler. The temperature distribution in the coating during dry band arcing is theoretically determined. The effect of the addition of ATH filler is discussed. It is shown that dry band arcing produces high temperatures (hot spots) which dissociate chemical bonds at the surface. It is suggested that during dry band arcing, the heat energy at the surface penetrates into the bulk of the coating, thereby breaking side groups and the main chain of the polydimethyl silicone molecule

Keywords

arcs (electric); filled polymers; insulation testing; silicones; ATH filler; RTV silicone rubber coatings; alumina trihydrate filler; chemical bonds; dry band arcing; filler level; hot spots; main chain; polydimethyl silicone molecule; room-temperature vulcanizing; side groups; temperature distribution; thermal characteristics; Arc discharges; Coatings; Conducting materials; Flashover; Heat transfer; Rubber; Surface contamination; Surface resistance; Temperature; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-0565-5

Type

conf

DOI

10.1109/CEIDP.1992.283135

Filename

283135