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:
Jul. 31, 1984
Filed:
Feb. 16, 1982
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
An oxygen sensing element having a ceramic substrate, a layer of an oxygen ion conductive solid electrolyte such as zirconia containing a stabilizing oxide such as yttria, and a pair of electrode layers formed on one side of the solid electrolyte layer so as to be spaced from each other. To prevent a significant change in the output characteristic of the element caused by diffusion of the stabilizing oxide from the solid electrolyte layer into the ceramic substrate, there is a barrier layer which intervenes between the substrate and the solid electrolyte layer at least in a region between the two electrode layers. The barrier layer is formed of a ceramic material such as the above mentioned solid electrolyte or a metal such as platinum, or has a double-layer structure consisting of a metal layer in direct contact with the substrate and an outer layer formed of a ceramic material.