Exhaust gas sensor and process for producing same
US4575441A · kind A · utility
3Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Mar 8, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1455
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A combustion gas sensor and material therefore responsive to changes in the composition of ambient atmospheres wherein the sensing element includes SnO.sub.2 crystals having a mean d of approximately 500-3200 .ANG. and having a surface area to mass ratio S of 1-8 m.sup.2 /g a process for making same. Preferably, the standard deviation of crystal size distribution is 0.2d.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.