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Abstract
This study uses a solid YSZ electrolyte film in a SnO2 MEMS SO2 gas sensor of the semiconductor type to enhance the redox reaction. The YSZ film is prepared by RF sputtering. XRD analysis shows the presence of the (111), (200), (220) and (311) peaks that denote the crystallization planes of YSZ. The experimental results show that the SnO2 MEMS SO2 gas sensor with a YSZ film has a better sensor response than a pure SnO2 MEMS SO2 gas sensor or a YSZ MEMS SO2 gas sensor when the SO2 concentration and the sensor's temperature sensors are 250 ppb and 400 °C, respectively. The YSZ/SnO2 sensor's measured responses are around 6%, 45%, 20% and 16% when the sensor is respectively operated at 250 °C, 300 °C, 350 °C, and 400 °C.
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