Method for manufacturing electrode
US5989624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4074
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is described a gas-component concentration sensor, a method of using the sensor, and a method of manufacturing a particular electrode of the sensor, wherein the sensor comprises: PA1 a first measurement chamber, an oxygen partial-pressure detection electrode in the first measurement chamber, a first oxygen-ion pump cell within and outside the first measurement such that in response to a voltage applied between the pair electrodes the cell pumps out oxygen to an extent such that a gas component such as NO.sub.x partially decomposes in said first measurement chamber in an amount of not more than 40 wt. % of the gas component present; PA1 a second measurement chamber into which the measurement gas is introduced from the first measurement chamber, a second oxygen pump cell having a pair of electrodes such that in response to a voltage applied therebetween the second oxygen-ion pump cell decomposes the gas component within the second measurement chamber; PA1 wherein the pair of electrodes of the first oxygen ion pump cell the electrode provided inside first measurement chamber includes fine particles having a function of suppressing dissociation of the gas component that are forme…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.