Title:
SENSOR ELEMENT OF NOx SENSOR
Document Type and Number:
WIPO Patent Application WO/2024/029402
Kind Code:
A1
Abstract:
This sensor element is provided with an oxygen concentration adjustment pump cell including an inside pump electrode, which is provided on a base portion configured from a solid electrolyte having oxygen ion conductivity, and which is a porous cermet electrode of a noble metal and the solid electrolyte, the inside pump electrode being provided facing a first internal cavity into which a gas being measured is introduced from the outside under a predetermined diffusion resistance, and an extra-cavity pump electrode provided outside the first internal cavity, wherein: a partial electrode portion of the inside pump electrode opposing the extra-cavity pump electrode across a portion of the base portion has a nano-level mixed region of the noble metal and the solid electrolyte; an abundance ratio of the nano-level mixed region in a central portion of the partial electrode portion is 50% to 90%; and the abundance ratio of the nano-level mixed region in a distal end portion and a rear end portion is at least 3% less than the abundance ratio of the nano-level mixed region in the central portion.
Inventors:
WATANABE YUSUKE (JP)
ITO SAKI (JP)
GORO YOHEI (JP)
ITO SAKI (JP)
GORO YOHEI (JP)
Application Number:
PCT/JP2023/027182
Publication Date:
February 08, 2024
Filing Date:
July 25, 2023
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
G01N27/416
Foreign References:
| JP2022113129A | 2022-08-03 | |||
| JP2021051061A | 2021-04-01 | |||
| JP2019158866A | 2019-09-19 | |||
| JP2009244117A | 2009-10-22 | |||
| JP2020106438A | 2020-07-09 |
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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