JP2017116530A5

JP2017116530A5 -

Info

Publication number: JP2017116530A5
Application number: JP2016223352A
Authority: JP
Filing date: 2016-11-16
Publication date: 2018-02-01
Anticipated expiration: 2036-11-16

Description

本発明の一態様は、外部から導入される被測定ガス（Ｇ₁）と接触する測定ガス面（２１）と、外部から導入される基準ガス（Ｇ₀）と接触する基準ガス面（２２）とを有する、酸素イオン伝導性の固体電解質体（２）と、
該固体電解質体の上記測定ガス面に設けられたセンサ電極（３）と、
上記固体電解質体の上記基準ガス面に設けられた基準電極（４１）と、を少なくとも備え、
上記センサ電極が、酸素イオン伝導性の固体電解質（３１）と、貴金属（３２）とを含有し、ピーク気孔径が０．０３μｍ〜０．２８μｍの多孔体からなる、ガスセンサ素子（１）にある。 One embodiment of the present invention includes a measurement gas surface (21) that comes into contact with a measurement gas (G ₁ ) introduced from the outside, and a reference gas surface (22) that comes into contact with a reference gas (G ₀ ) introduced from the outside. An oxygen ion conductive solid electrolyte body (2),
A sensor electrode (3) provided on the measurement gas surface of the solid electrolyte body;
A reference electrode (41) provided on the reference gas surface of the solid electrolyte body,
In the gas sensor element (1), the sensor electrode comprises a porous body having an oxygen ion conductive solid electrolyte (31) and a noble metal (32) and having a peak pore diameter of 0.03 μm to 0.28 μm. is there.

Claims

Oxygen ion conduction having a measurement gas surface (21) in contact with a measurement gas (G ₁ ) introduced from outside and a reference gas surface (22) in contact with a reference gas (G ₀ ) introduced from outside Solid electrolyte body (2),
A sensor electrode (3) provided on the measurement gas surface of the solid electrolyte body;
A reference electrode (41) provided on the reference gas surface of the solid electrolyte body,
A gas sensor element (1), wherein the sensor electrode comprises a porous body having an oxygen ion conductive solid electrolyte (31) and a noble metal (32) and having a peak pore diameter of 0.03 μm to 0.28 μm.

The gas sensor element according to claim 1, wherein the noble metal contains Pt and Rh.

The gas sensor element according to claim 1 or 2, wherein the content of Rh in the noble metal is less than 50 mass%.

Furthermore, the sensor electrode contains a sintering inhibitor (34) that suppresses sintering of the solid electrolyte, and the content of the sintering inhibitor is 5 to 20% by mass. The gas sensor element according to claim 1.

The gas sensor element of any one of Claims 1-4 whose thickness T of the said sensor electrode is 5 micrometers or more and 16 micrometers or less.

A gas sensor (6) comprising the gas sensor element according to any one of claims 1 to 5.