P1.0.6 Impedancemetric Acetylene Sensor Besed on Perovskite-Type Oxide Sm1-xCaxFeO3 (x = 0, 0.05, 0.20, 1.0) Thick-Film

Tomohisa Tasaki, Satako Takase & Youichi Shimizu
Perovskite-type oxide Sm1-xCaxFeO3(x = 0, 0.05, 0.20, 1.0) powders were prepared by a wet-chemical route using a polymer precursor method at 750 ºC and a screen-printed oxide thick films were applied as an acetylene sensor which outputs were measured by an AC impedance spectroscopy. Although the conductance of Ca2+-substituted SmFeO3 device was high, the amount of impedance change to C2H2 in PO2 = 0.21 atm was low, compared with SmFeO3.