| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple self-heat-generation-type gas sensor that has improved response, cannot be affected greatly by an interference gas, and can stably maintain proper output. SOLUTION: A gas sensor is composed of a linear body or a band-shaped body consisting of a conductive oxide where the amount of oxygen in a crystal can be changed, and a site whose resistance is increased by reducing a sectional area in that current flows as compared with other parts is provided at a part other than both the end parts. A compound oxide that has K2NiF4-type crystal structure and at the same time is expressed by an expression Ln2-XAEXMO4+d (however, Ln indicates one type or two types or more of lanthanoid with an atomic number of 57-71, AE indicates one type or two types or more of an alkali earth element, and M indicates one type or two types or more of the transition element with an atomic number of 25-28 with 0<=x<=1.5), a compound oxide expressed by La3Ni2O7+d, La4Ni3010+d, or La1-XCoXO3, or the like can be adopted as a conductive oxide.
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