Fabrication of Sm-Based Perovskite-Type Oxide Thin-Films and Gas Sensing Properties to Acetylene

Tomohisa Tasaki, Satoko Takase, Youichi Shimizu

Department of Applied Chemistry, Kyushu Institute of Technology, Tobata, Japan.

DOI: 10.4236/jst.2012.22011                

Abstract

Sm-based perovskite-type oxide (SmMeO₃: Me = Cr, Mn, Fe, Co) thin-films could be synthesized by a wet-chemical method using an acetylacetone—Poly(Vinyl Pyrrolidone) (PVP) polymeric precursor method at 750℃. The perovskite-type oxide thin-films were tried to apply an acetylene gas sensor based on AC impedance spectroscopy. Among the oxides tested, SmFeO₃ thin-film sensor showed good sensor responses in which the AC impedance at 20 kHz was depending on acetylene gas concentration between 2 ppm and 80 ppm at 400℃.

Keywords

Perovskite-Type Oxide; Thin-Film; Ac Impedance; Acetylene; Gas Sensor

Conflicts of Interest

The authors declare no conflicts of interest.

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