APPLICATION OF CONDUCTIVE PORCELAIN TO ELECTRICAL INSULATORS

摘要

A ceramic body such as a porcelain insulator is provided with a conductive porcelain layer which can be fired on to the body without diffusion into a contiguous insulative or semiconductive glaze layer. The conductive porcelain layer consists of insulator clay admixed with ferric oxide, the ferric oxide constituting from 15% to 50% by dry weight of the mixture, and is fired on to the porcelain body of the insulator for a time of four to eight hours at a temperature in the range 1115.degree.C to 1365.degree.C.