Abstract

NASICON materials can be used as the solid electrolyte component in the sensor system, because they have excellent Na+ conductivity. This study prepares NASICON materials by solid state reaction method, and their phase, microstructure and electrical property will be characterized by XRD, SEM and EIS. Then an amperometric NO2 sensor is fabricated to detect NO2 gas in the level of ppb. The sensor current signal will be studied by changing different NO2 concentrations, employing different materials on the counter electrode and using different applied voltages when the working temperature is 150°C.

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