Nitrogen oxide detecting sensor and method of manufacturing the same
US5863503A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/179228
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nitrogen oxide detecting sensor, according to the present invention, incorporates a gas detecting portion including, as a main component thereof, an oxide compound having electric conductivity or semiconductivity, the oxide compound having a crystal structure of 2212 phase and expressed generally as: Bi.sub.2 Sr.sub.2 (Ca.sub.1-x Y.sub.x)Cu.sub.2 O.sub.8.+-..delta. where 0.6.ltoreq.x<1; 0.ltoreq..delta..ltoreq.1. Electrodes are electrically connected to the gas detecting portion. When the gas detecting portion is analyzed by X-ray diffraction using cuK.alpha. rays to obtain diffraction peak values thereof in the range of a diffraction angle between 5.degree. and 65.degree., the diffraction peak values having a sum .SIGMA. I2212! expressed by one of the following: PA1 (a) .SIGMA. I2212!/.SIGMA. IT!>88.1% PA1 (b) {.SIGMA. I2212!+.SIGMA. I2201!}/.SIGMA. IT!>94.8% PA1 (c) {.SIGMA. I2212!+.SIGMA. IY.sub.2 O.sub.3 !} .SIGMA. IT!>88.1% PA1 (d) {.SIGMA. I2212!+.SIGMA. I(Bi, Ca) O!}/.SIGMA. IT! >88.8% where .SIGMA. I2201! is a sum of diffraction peak intensity values based on the 2201 phase; .SIGMA. IY.sub.2 O.sub.3 ! is a sum of diffraction peak intensity values based on Y.sub.2 O.sub.3 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.