Application of Mixed Oxide Capacitor to the Selective Carbon Dioxide Sensor I . Measurement of Carbon Dioxide Sensing Characteristics

Oxide capacitors consisting of BaTiO 3 and an oxide are studied as a sensor for CO 2 detection. Although the capacitance change of PbO on exposure to CO 2 was small, it was greatly enhanced by the combination with BaTiO 3 . Sensitivity to CO 2 and optimum operating temperature were strongly dependent on the oxide combined with BaTiO 3