Smoke and gas sensor element

Details Smoke and gas sensor element Smoke and gas sensor element

1975-07-29

1977-08-30

Queisser, Richard C.

Measuring and testing

Gas analysis

Gas chromatography

23254E, 338 34, G01N 2712

Patent

active

040446018

ABSTRACT:
A sensor element for detecting smoke and/or reducing gases, which comprises a shaped body formed from a material consisting essentially of:
A. a complex metal oxide having a perovskite type crystal structure and represented by the general formula ABO.sub.3-.delta. wherein A is at least one element selected from the group consisting of yttrium, a rare earth element having an atomic number of from 57 to 71 and an alkaline earth metal, B is at least one element selected from the group consisting of transition metals having atomic numbers from 21 to 30, O is oxygen and .delta. is a nonstoichiometric parameter which may vary from 0 to 0.25 and
B. at least one metal oxide selected from the group consisting of CdO, In.sub.2 O.sub.3, SnO, Tl.sub.2 O.sub.3 and PbO.

REFERENCES:
patent: 3695848 (1972-10-01), Taguchi
patent: 3865550 (1975-02-01), Bott et al.
patent: 3951603 (1976-04-01), Obayashi et al.

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