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An extended-life and ultra-low oxygen sensor has been fabricated by using polycrystalline Caβ″/β/α-Al2O3 as a solid electrolyte. Five reference electrodes CaO+O2, Caβ″/β/α-Al2O3 (powder)+O2,Cr+Cr2O3, Nb+NbO and Mo+MoO2 were tested in order to select a better reference electrode for this sensor. The limit of determining oxygen activity and the extended-life of the sensor were also tested in this study.
An extended-life and ultra-low oxygen sensor has been fabricated by using polycrystalline Caβ “/ β / α-Al2O3 as a solid electrolyte. Five reference electrodes CaO + O2, Caβ” / β / Cr + Cr2O3, Nb + NbO and Mo + MoO2 were tested in order to select a better reference electrode for this sensor. The limit of determining oxygen activity and the extended-life of the sensor were also tested in this study.