Abstract
Metal oxides have the best combination of properties required for designing gas sensors aimed at the detection of a great number of gases and vapors. However, it was found that in several cases connected with the detection of specific gases, such as CO2, H2, SO2, and NO x at low operating temperatures, other materials, in particular solid electrolytes based on various salts, can be preferable. The present chapter analyzes these materials and includes a general overview of electrochemical solid electrolyte-based gas sensors, describing the ideal solid electrolyte for application in gas sensors. Various gas sensors, which can be based on different solid electrolytes are discussed And the cross sensitivity of solid electrolyte-based gas sensors is analyzed. The chapter includes 15 figures, 5 tables, and 91 references.
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