The capacitances of CuO mixed with BaSnO3, CaTiO3, and ZnO are dependent on the CO2 concentration, similarly to that of CuO-BaTiO3. In particular, the mixed oxide CuO-SrTiO3 is more sensitive to CO2 than CuO-BaTiO3, and the mixed-oxide capacitor CuO-BaSnO3 is promising for sensing CO2 over a wide range of concentrations. Moreover, addition of Ag to CuO-BaTiO3 mixed oxide is effective for enhancing the sensitivity to CO2. The sensitivity (CCO2/Cair) to 2% CO2 of Ag-added CuO-BaTiO3, which has been calcined at 700 °C followed by operation for 60 h, is as high as 70.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry