Method for manufacturing a gas sensor unit
US6174489A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1998 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Aug 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4073
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for manufacturing an oxygen sensor unit of the type which includes at least a shaped body of a solid electrolyte, an inner electrode provided on an inside surface of the shaped body and exposed to a reference gas, an outer electrode provided on an outside surface of the shaped body and exposed to a gas to be measured, and a porous protective layer covering the outer electrode and a portion of the shaped body adjoining to said outer electrode wherein the solid electrolyte is made of a mixture of zirconia and a stabilizer therefor and is constituted of a sintered product of partially stabilized zirconia. The method is characterized in that the partially stabilized, sintered zirconia is obtained according to a high temperature sintering process which includes at least the step of sintering the mixture at a temperature of 1200.degree. C. or over for a duration of 2 to 6 hours wherein a value obtained by integrating a variation in the sintering temperature with the duration in the sintering process is in the range of 300 to 1500.degree. C..multidot.hour.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.