| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem wherein the electromotive force of conventional CO<SB>2</SB>sensors, the detection electrodes of which are made of alkali metal carbonate, such as, lithium carbonate is significantly shifted, when left standing under a high-humidity condition, and to improve the sensor in moisture resistance. <P>SOLUTION: The CO<SB>2</SB>sensor is configured, such that a counter electrode and the detection electrode contact with an alkali ion conductor, and a heater for heating them is disposed thereon. The detection electrode of the sensor is made up of noble metal and alkali metal zirconate. Since the amount of migration in the alkali metal zirconate due to dew condensation is small, activity of alkali metal ions, such as lithium ions, can be kept constant, and an electrode reaction with CO<SB>2</SB>can be carried out reversibly, thereby improving the CO<SB>2</SB>sensor in moisture resistance. <P>COPYRIGHT: (C)2009,JPO&INPIT |
