Smoke and gas sensor element
US4044601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jul 29, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.