Method for preparing rare earth or yttrium, transition metal oxide thermistors
US4232441A · kind A · utility
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11References
2Claims
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Key dates
| Filing date | Jun 29, 1978 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jun 29, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49101
- 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.