| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid electrolyte type carbon dioxide sensor element capable of highly accurate measurement even when an operation temperature is lowered to a low-temperature region of about 300°C, and having the unchanged electromotive force even when left for long hours in the non-heated state. <P>SOLUTION: In this solid electrolyte type carbon dioxide sensor element, a working electrode layer containing an electron conductive material and a metal carbonate and a reference electrode layer containing the electron conductive material are formed on the solid electrolyte layer surface. The sensor element has a characteristic wherein the working electrode layer contains a carbonate oxide of a rare earth element, preferably La<SB>2</SB>O<SB>2</SB>CO<SB>3</SB>, Nd<SB>2</SB>O<SB>2</SB>CO<SB>3</SB>or the like, and a zeolite. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
