Exhaust gas sensor and process for producing same

Details Exhaust gas sensor and process for producing same Exhaust gas sensor and process for producing same

1985-03-13

1987-10-20

Shaw, Clifford C.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

422 98, 29592R, H01L 700

Patent

active

047017392

ABSTRACT:
An exhaust gas sensor including a compound ASnO.sub.3-.delta. wherein A is Ba, Ra, Sr or Ca to make use of the variation of resistance value of the compound. BaSnO.sub.3-.delta. and RaSnO.sub.3-.delta. are n-type semiconductors, while SrSnO.sub.3-.delta. and CaSnO.sub.3-.delta. exhibit the behavior of n-type semiconductors at the point of equivalence and the behavior of p-type semiconductors in the lean burn region. The compound ASnO.sub.3-.delta. is prepared by reacting an alkaline earth with SnO.sub.2.

REFERENCES:
patent: 3946198 (1976-03-01), Foote
patent: 4194994 (1980-03-01), Baresel et al.
patent: 4314996 (1982-02-01), Serido et al.
patent: 4459577 (1984-07-01), Murakami et al.
patent: 4507643 (1985-03-01), Sunono et al.
Proceedings of the International Meeting on Chemical Sensors, pp. 187-192 (Kodansha, 1983).

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