Oxygen sensor element
US5538612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1992 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Mar 12, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oxygen sensor element comprises a reference-gas-side electrode on one surface of a solid electrolyte having oxygen-ion conductivity, a detection-gas-side electrode on another surface, and a porous coated layer formed of a heat-resistant metal oxide formed on the surface of the detection-gas-side electrode, wherein at least a part of said coated layer is formed of a nonstoichiometric compound of transition metal (Ti, Co, Ni) oxide, and a portion formed of said nonstoichiometric compound carries a catalyst for equilibrating gas components of a detection gas. The catalyst (Pt, Rh) is 0.2-5 mole % relative to the portion formed of said nonstoichiometric compound. The coated layer may be thickened at the distal end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.