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:
Oct. 15, 1985
Filed:
May. 02, 1985
Da Y Wang, Lexington, MA (US);
Daniel T Kennedy, Burlington, MA (US);
GTE Laboratories Incorporated, Waltham, MA (US);
Abstract
A gas concentration sensing or pumping device is formed of a body of solid electrolyte material which exhibits ionic conduction when the concentration of gas is different between first and second surfaces of the body, or which, upon application of a voltage across the body, will cause gas on one side of the body to be pumped to the other side. A thin film of a composition comprising an element selected from the group consisting of rare earth elements, alkaline earth metals, Ga Pb, In, Sn, Ti, Mo and W wherein Bi is the predominant element is formed on a major surface of the body to enhance conductivity at the electrode/body interface. Conductive electrode layers are formed over the film and an opposing major surface. The conductive layers may be formed of porous LaCrO.sub.3 and the body may be formed of ZrO.sub.2, CeO.sub.2 or ThO.sub.2. An apertured disc or a layer of gas permeable material is formed over the sensor. A voltage is applied across the body of solid electrolyte causing transport of oxygen through the aperture or pores. The output current measures the oxygen concentration passing therethrough.