Sensor coating inhibiting glass formation
US6544405B2 · kind B2 · utility
6Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4077
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exhaust gas sensor element having an electrochemical cell, a protective material in fluid communication with the electrochemical cell, and a reactive inhibitive coating disposed over the protective material. The reactive inhibitive coating prevents the reaction of compounds with acids(e.g., phosphates) in the exhaust gas, which may form a dense glass layer on the outside of the gas sensor. The reactive inhibitive coating is either an alkaline earth oxide ethoxide, and/or carbonate that is deposited on the gas sensor to a thickness so as to preferably provide an excess of either the alkaline earth material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.