Title:
SENSOR ELEMENT OF NOx SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/029403
Kind Code:
A1
Abstract:
This sensor element comprises: an oxygen-concentration-adjusting pump cell including an inner-side pump electrode that is a porous cermet electrode composed of a rare metal and a solid electrolyte, the inner-side pump electrode being provided to a base part composed of a solid electrolyte and facing a first internal void into which a gas being measured is introduced from the outside, the oxygen-concentration-adjusting pump cell also including an out-of-void pump electrode that is provided outside of the first internal void; and a measurement pump cell including an NOx detection electrode that is provided to a measurement internal void communicating with the first internal void, and an out-of-void pump electrode. A measurement electrode and a parallel electrode that faces the out-of-void pump electrode of the inner-side pump electrode across a portion of the base part have a nano-level mixture region of the rare metal and the solid electrolyte. A first presence ratio that is the ratio of the mixture region present in the parallel electrode is 40-60%. The proportion of a second presence ratio that is the ratio of the mixture region present in the measurement electrode to the first presence ratio is 0.03-0.1.
Inventors:
WATANABE YUSUKE (JP)
ITO SAKI (JP)
GORO YOHEI (JP)
ITO SAKI (JP)
GORO YOHEI (JP)
Application Number:
PCT/JP2023/027193
Publication Date:
February 08, 2024
Filing Date:
July 25, 2023
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Foreign References:
| JP2020106438A | 2020-07-09 | |||
| JP2017116530A | 2017-06-29 | |||
| JP2017020838A | 2017-01-26 | |||
| JP2022113129A | 2022-08-03 | |||
| JP2021051061A | 2021-04-01 |
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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