Article and method of forming porous coating on electrode layer of concentration cell type oxygen sensor
US4097353A · kind A · utility
37Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1976 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Jun 10, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4077
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A porous coating, which is effective in restricting the flow of a gas under measurement relatively to the electrode layer of the sensor and protecting the electrode against detrimental influences, is formed by spraying fine particles of a heat-resistant and chemically stable material at a high temperature onto the electrode surface to form a porous layer with pores of a moderate size, then impregnating the porous layer with an aqueous dispersion of fine particles of a similar material followed by baking the impregnated layer, so that the finished coating has pores of appropriate size and total volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.