Zinc oxide varistor and method of making it

Details Zinc oxide varistor and method of making it Zinc oxide varistor and method of making it

1985-03-29

1987-10-13

Grimley, Arthur T.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

252519, 338308, 427101, 4271266, 4273762, H01C 710

Patent

active

047001690

ABSTRACT:
A high resistivity layer is disclosed for a medal oxide voltage-nonlinear resistor (varistor) for arrestors and surge absorbers of the type having a sintered body containing zinc oxide as a major component and two spaced electrodes attached to the surface of the body wherein the electrodes are insulated from one another by the high resistivity layer. The high resistivity layer of the invention consists essentially of at least zinc ferrate (III). The high resistivity layer is formed by sintering a slurry containing ferric oxide (Fe.sub.2 O.sub.3) as a major component.

REFERENCES:
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patent: 3162603 (1964-12-01), Kohn et al.
patent: 3813296 (1974-05-01), McStrack et al.
patent: 3872582 (1975-03-01), Matsuoka et al.
patent: 3905006 (1975-09-01), Matsuoka et al.
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patent: 4031498 (1977-06-01), Hayashi et al.
patent: 4171328 (1979-10-01), Umemura et al.
Ichinose, Noboru and Yuji Yokomizo, "High Performance Ceramic Varistor Element TNR", Toshiba Review, vol. 27, No. 12, Dec. 1972, pp. 1167-1172.

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