Metallic oxide resistive bodies having a nonlinear volt-ampere c

Details Metallic oxide resistive bodies having a nonlinear volt-ampere c Metallic oxide resistive bodies having a nonlinear volt-ampere c

1991-10-16

1992-08-11

Lateef, Marvin M.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

252521, 296101, H01C 710, H01C 1700

Patent

active

051382989

ABSTRACT:
An electrically resistive body best suited for providing varistors of high surge withstanding capability and high nonlinearity coefficient over a wide range of current magnitudes. The resistive body is composed of a major proportion of metallic oxides including zinc oxide, bismuth trioxide, antimony trioxide, cobaltous oxide, magnesium oxide, manganous oxide, and boric oxide. To these major ingredients there are added minor proportions of boric oxide and aluminum oxide, or of boric oxide and spinel. For the fabrication of such resistive bodies, the mixture of the noted ingredients in finely divided form are molded into desired shape and size, and the moldings are sintered.

REFERENCES:
patent: 4169071 (1979-09-01), Eda et al.
patent: 4943795 (1990-07-01), Yamazcki et al.

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