Varistor or capacitor and method of making same

Details Varistor or capacitor and method of making same Varistor or capacitor and method of making same

1991-09-12

1992-07-28

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29 2542, 264 61, H01G 410, H01G 700, C04B 3334

Patent

active

051345404

ABSTRACT:
A method of manufacturing an improved varistor or capacitor, and the resultant improved varistor or capacitor is described. In accordance with the method the ceramic layers of the varistor are formed by providing at least two strata separated by a boundary layer which resists grain growth thereacross. The ceramic body is sintered under temperature conditions sufficiently low that grain growth within the strata defining the ceramic layers is restricted to the strata such that grain growth across the boundary material is minimized. By this method the ceramic layers have a predictable number of grain boundaries between adjacent electrodes.

REFERENCES:
patent: 2778762 (1957-01-01), Eisler
patent: 3419759 (1968-12-01), Hayakawa
patent: 3426250 (1969-02-01), Kahn
patent: 3496008 (1970-02-01), Haskins et al.
patent: 3794707 (1974-02-01), O'Neill et al.
patent: 3798762 (1974-03-01), Harris et al.
patent: 4153491 (1979-05-01), Swiss et al.
patent: 4289719 (1981-09-01), McIntosh et al.
patent: 4598107 (1986-07-01), Herron et al.
patent: 4761711 (1988-08-01), Hiremath

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