Gas-sensor element and method for detecting reducing gas or oxygen gas
US3951603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1973 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Jul 5, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/205831
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas-sensor element for detecting reducing gases and vapors such as alcohols or carbon monoxide, or for determining oxygen concentration, which is characterized by comprising a complex metal oxide having a perovskite-type crystal structure and represented by the general formula A.sub.1.sub.-x A'.sub.x BO.sub.3.sub.- .sub..delta., wherein A is at least one element selected from the group consisting of rare earth elements of the atomic numbers from 57 to 71, yttrium, and hafnium, A' is at least one element selected from the group consisting of alkaline earth metals and lithium, B is at least one element selected from the group consisting of transition metals of the atomic numbers from 21 to 30, O is oxygen, x is in the range of 0 .ltoreq. x .ltoreq. 1, and .delta. is a nonstoichiometric parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.