SENSOR ELEMENT AND GAS SENSOR - NGK INSULATORS LTD

Title:

SENSOR ELEMENT AND GAS SENSOR

Document Type and Number:

WIPO Patent Application WO/2022/209529

Kind Code:

A1

Abstract:

This sensor element 20 is provided with an element body 60, an upper connector electrode arranged on a first surface 60a of the element body 60, and a protective layer 80 covering at least the front end side of the first surface 60a. The protective layer 80 has a first specific protective layer 92 with a thickness T1 of 10 μm or less, and the ratio T1/T2 of the thickness T1 and the thickness T2 of a front part 88 which is the front part of the first specific protective layer 92 in the protective layer 80 is 1.0 or less.

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Inventors:

ISODA MICHIAKI (JP)
KOSAKA KEI (JP)
NORITAKE YOSUKE (JP)
KAYANO KEITA (JP)

Application Number:

PCT/JP2022/008590

Publication Date:

October 06, 2022

Filing Date:

March 01, 2022

Export Citation:

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Assignee:

NGK INSULATORS LTD (JP)

International Classes:

G01N27/409; G01N27/416

Domestic Patent References:

WO2019155865A1	2019-08-15
WO2019155867A1	2019-08-15

Foreign References:

JP2016065853A	2016-04-28
JP2019158554A	2019-09-19
JP2021043224A	2021-03-18
JP2020165693A	2020-10-08
JP2007132954A	2007-05-31

Other References:

POULSTON, S. BENNETT, R.A. FARALDI, P. HYDE, T.I. PIDRIA, M.F. HOUEL, V. WAGLAND, A.: "Characterization of protective coatings for planar automotive gas sensors", SENSORS AND ACTUATORS B: CHEMICAL, ELSEVIER BV, NL, vol. 110, no. 2, 14 October 2005 (2005-10-14), NL , pages 209 - 217, XP005023944, ISSN: 0925-4005, DOI: 10.1016/j.snb.2005.01.035