Ceramic electrolytes and electrochemical sensors |
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| Authors: | C. O. Park S. A. Akbar W. Weppner |
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| Affiliation: | (1) Department of Materials Science and Engineering, KAIST, Taejon, 305-701, Korea.;(2) Department of Materials Science and Engineering, CISM, Ohio State University, 291 Watts Hall, Columbus, OH 43210, USA;(3) Christian-Albrechts University of Kiel, Kaiserstrasse 2, D-24143 Kiel, Germany |
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| Abstract: | The electrochemical method involving solid electrolytes has been known as a selective and an accurate way of sensing chemical species in the environment and even in liquid metal for some time. The most successful among the electrochemical sensors are the emission control sensor ( -sensor) for the automobile engine and the oxygen sensor used in steelmaking, both made of stabilized zirconia. This article presents an overview of basic principles of various types of electrochemical sensors including active (potentiometric) and passive (amperometric) sensors. Recent advances in oxygen (O2), carbon dioxide (CO2) and hydrogen (H2) sensors are also presented. |
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