Voltage-dependent resistor and method of producing such a resist

Details Voltage-dependent resistor and method of producing such a resist Voltage-dependent resistor and method of producing such a resist

1981-05-13

1983-11-22

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

H01C 710

Patent

active

044172273

ABSTRACT:
A lead germante phase, (Pb.sub.5 Ge.sub.3 O.sub.11) is added to a ceramic sintered body formed from a polycrystalline alkaline earth metal titanate which has been doped with a small quantity of metal oxide to produce a N-type conductivity. A thin insulating layer of this germante is formed at the grain boundaries of the polycrystalline semiconducting alkaline earth metal titanate because of the formation of a liquid phase during sintering. Thus, the varistor effect is immediately available in the overall volume of the resistance body and need not first be induced by means of a forming procedure, as is the case for known resistors formed from N-doped barium titanate.

REFERENCES:
patent: 2885521 (1959-05-01), Fotland
patent: 3245019 (1966-04-01), Heywang et al.
patent: 3764566 (1973-10-01), Matsuoka et al.
patent: 4028277 (1977-06-01), Matsuura et al.

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