Solid-Electrolyte Impedancemetric CO₂ Sensor Attached with La_0.4Sr_0.6MnO₃ Receptor

抄録

A solid-state impedancemetric CO₂ sensor consisting of perovskite-type oxide (La_1-xSr_xMnO₃) as receptor material and a Li_1.5Al_0.5Ti_1.5(PO₄)₃ (LATP) disc as solid electrolyte transducer was investigated for the detection of various concentrations of CO₂ at 400 ºC. The responses of the lanthanum manganite/LATP-based sensor were divided into a resistance component and capacitance component. The sensitivities to CO₂ were largely affected by the type of receptor material used. The La_0.4Sr_0.6MnO₃/ LATP-based impedancemetric sensor element showed potential CO₂ sensing properties.