Rare earth or yttrium, transition metal oxide thermistors
US4231254A · kind A · utility
5Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Mar 12, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Thermistors comprising transition metal such as iron, rare earth of the lanthanide series or yttrium, and oxygen exhibit sufficient independence to variation in oxygen partial pressure over a range of exhaust gas conditions of internal combustion engines as to make them particularly suitable for temperature compensation of oxygen sensors such as those derived from titania as well as temperature sensing in other oxygen varying environments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.