Electrical Conductivity and Sensitive Characteristics of Ag-Added BaTiO3-CuO Mixed Oxide for CO2 Gas Sensing

Abstract

Abstract: Carbon dioxide gas sensors based on BaTiO₃-CuO composite with different concentrations of Ag addition (1, 1.5 and 2 wt%) have been prepared by stander ceramic method and sintered at 500 and 700°C for 5 h. Electrical conductivity and gas sensing properties of the prepared samples were investigated. Electrical conductivity measurement was used to characterize the obtained sintered sensor pellets. It was found that electrical conductivity and the sensitivity to CO₂ were improved with Ag addition and sintering. The correlation between Ag content at different sintering temperature and sensing characteristics towards CO₂ is discussed.

Key words: BaTiO₃-CuO composite, Ag addition, Electrical conductivity, CO₂ sensitive properties

A.M. El-Sayed F.M. Ismail S.M. Yakout. Electrical Conductivity and Sensitive Characteristics of Ag-Added BaTiO₃-CuO Mixed Oxide for CO₂Gas Sensing[J]. J Mater Sci Technol, 2011, 27(1): 35-40.

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Electrical Conductivity and Sensitive Characteristics of Ag-Added BaTiO₃-CuO Mixed Oxide for CO₂Gas Sensing

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