The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 2021
Filed:
Mar. 13, 2019
Ngk Insulators, Ltd., Nagoya, JP;
Yusuke Watanabe, Nagoya, JP;
Takayuki Sekiya, Nisshin, JP;
Yuki Nakayama, Nagoya, JP;
Shota Kageyama, Nagoya, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A sensor element includes: a first inner space into which a measurement gas is introduced from outside; a second inner space communicated with the first inner space; a main pump cell constituted by an inner pump electrode facing the first inner space, an external pump electrode on a surface of the sensor element, and a solid electrolyte located therebetween; a measurement electrode facing the second inner space and functioning as a reduction catalyst for NOx; and a measurement pump cell constituted by the measurement electrode, the external pump electrode, and a solid electrolyte located therebetween. The inner pump electrode is a cermet made of an Au—Pt alloy containing Au ranging from 0.6 wt % to 1.4 wt % and ZrO, and has a thickness ranging from 5 μm to 30 μm, a porosity ranging from 5% to 40%, and an area ranging from 5 mmto 20 mm.