ガスセンサ素子の製造方法およびガスセンサ素子 - 株式会社日本自動車部品総合研究所

Title:

ガスセンサ素子の製造方法およびガスセンサ素子

Document Type and Number:

Japanese Patent JP4003879

Kind Code:

B2

Abstract:

To provide a gas sensor element for accurately detecting the concentration of specific gas components such as NOx by reducing oxygen ion current due to reduction/decomposition of Rh2O3.

This gas sensor element 1 is characterized in that it is provided with an oxygen pump cell 2 for adjusting oxygen concentration in an internal space 7 into which a measured gas is brought and a sensor cell 4 for detecting NOx concentration in the measured gas, and that an electrode 4a facing to the internal space 7 of the sensor cell 4 is a Rh-containing cermet electrode. The sensor element 1 is made such that the pump cell 2 and the sensor cell 4 are layered and baked, and then previous treatment is performed by passing a current through the sensor 4. Rh2O3produced in the electrode 4a facing to the internal space 7 of the sensor cell 4 in the baking process is reduced to metallic Rh. Only oxygen ion current due to the reduction/decomposition of NOx can be accurately detected since oxygen ion current due to the reduction/decomposition of Rh2O3is not added thereto when detecting the NOx concentration.

More Like This:

WO/2021/241238	SENSOR ELEMENT
WO/2022/246206	HIGH PRESSURE SINGLE-USE ELECTROCHEMICAL ANALYTICAL SENSOR
JP4092904	Battery status determination device

Inventors:

Keigo Mizutani
Makino Taisuke
Toshitaka Saito

Application Number:

JP2003035194A

Publication Date:

November 07, 2007

Filing Date:

February 13, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

株式会社日本自動車部品総合研究所
株式会社デンソー

International Classes:

G01N27/416; G01N27/419; G01N27/407; G01N27/41; G01N33/00

Domestic Patent References:

JP11201942A
JP2001141696A
JP2001318075A
JP11183434A
JP2000002686A

Attorney, Agent or Firm:

Motomu Itou

Previous Patent: ディスクカートリッジ用収納ケース

Next Patent: トロイダル型無段変速機の変速制御装置