Carbon dioxide gas sensors and method of manufacturing and using same

US8052854B1 · kind B1 · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Gary W. Hunter · Oberlin, US
• Jennifer C. Xu · Westlake, US
• Chung-Chiun Liu · Cleveland, US
• Benjamin James Ward · Beachwood, US

Key dates

• Filing date: May 25, 2007
• Grant date: Nov 8, 2011
• Expiry date: Jul 10, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/004
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gas sensor includes a substrate and a pair of interdigitated metal electrodes selected from the group consisting of Pt, Pd, Au, Ir, Ag, Ru, Rh, In, and Os. The electrodes each include an upper surface. A first solid electrolyte resides between the interdigitated electrodes and partially engages the upper surfaces of the electrodes. The first solid electrolyte is selected from the group consisting of NASICON, LISICON, KSICON, and β″-Alumina (beta prime-prime alumina in which when prepared as an electrolyte is complexed with a mobile ion selected from the group consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+). A second electrolyte partially engages the upper surfaces of the electrodes and engages the first solid electrolyte in at least one point. The second electrolyte is selected from the group of compounds consisting of Na+, K+, Li+, Ag+, H+, Pb2+, Sr2+ or Ba2+ ions or combinations thereof.