| 摘要 |
PURPOSE:To reduce a detection error due to the remaining of unreacted combustible gas by enhancing oxygen sensitivity, by using a compound (AO)p.(TiO2)q as an oxygen-responsive element. CONSTITUTION:As the oxygen-responsive material used in an O2 sensor, a compound (AO)p.(TiO2)q [wherein A is at least one membered element of an alkaline earth metal, (p) and (q) are an integer and p>q]. For example, there is Sr2TiO2. This compound is a P-type metal oxide semiconductor having high oxygen sensitivity and low in sensitivity to combustible gas coexisting along with oxygen and reduce in a detection error due to the remaining of combustible gas. Concretely, a gas detection piece 8 is prepared by connecting noble metal electrodes 12, 14 to the porous sintered body of the compound (AO)p.(TiO2)q and connected to the outside by lead wires 16, 18. |
