Electrical insulator offering reduced sensitivity to pollution

Details Electrical insulator offering reduced sensitivity to pollution Electrical insulator offering reduced sensitivity to pollution

1984-04-23

1986-01-07

Askin, Laramie E.

Electricity: conductors and insulators

Insulators

Combined

65 6053, 174211, 252519, 4271262, 4271263, 4273762, H01B 1742, H01B 1750

Patent

active

045635447

ABSTRACT:
An electrical insulator offering reduced sensitivity to pollution comprises a body of a glass or porcelain dielectric material with a semiconductor outside coating. This coating mainly consists of zinc oxide with at least one further metal oxide added to it to make its voltage-current characteristic non-linear, such that I=kV.sup..alpha. where I is current, V is voltage, k and .alpha. are coefficients, and the value of .alpha. is between 20 and 50. The coating is between 0.05 and 0.5 mm thick. The further metal oxide is advantageously selected from bismuth, manganese, cobalt, chromium and antimony oxides.

REFERENCES:
patent: 3627905 (1971-12-01), Astle-Fletcher et al.
patent: 3795499 (1974-03-01), Ogawa et al.
patent: 4174303 (1979-11-01), Gaiffi et al.

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