Titania oxygen sensor with chrome oxide compensator

Details Titania oxygen sensor with chrome oxide compensator Titania oxygen sensor with chrome oxide compensator

1981-01-21

1983-06-07

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

422 98, H01L 700

Patent

active

043873596

ABSTRACT:
An oxygen sensor utilizes a chrome oxide compensating resistor (5) in series with a titania sensing resistor (3). The chrome oxide resistor (5) not only compensates for the effects of temperature on the titania sensing (3) resistor, but since it exhibits (p) type behavior while the titania exhibits (n) type behavior in the presence of gaseous oxygen, the sensitivity of the sensor is increased. The resistors (3, 5) can be applied as a film to a substrate (7) or they can be formed as discrete chips. Substantial quantities of alumina and glass can be added to the chrome oxide without affecting oxygen sensitivity although the electrical resistance rises substantially.

REFERENCES:
patent: 3695848 (1972-10-01), Taguchi
patent: 3900815 (1975-08-01), Taguchi
patent: 4001756 (1977-01-01), Heijne
patent: 4007435 (1977-02-01), Tien
patent: 4147513 (1979-04-01), Bienkowski et al.
patent: 4225842 (1980-09-01), Schlesselman

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