Abstract
Mixed-potential type sensors utilizing stabilized-zirconia (YSZ) and MNb2O6 (M: Co, Zn and Ni) sensing electrodes (SEs) were fabricated and examined for NO2 detection at high temperature. For mixed potential type NO2 sensor present fabricated, the device attached with CoNb2O6-SE has been found to give the highest response at 750°C compared with the other two devices and could detect even 0.1ppm NO2 with an acceptable response value (5mV). The present sensor showed fast response and recovery times to 100ppm NO2 at 750°C, which are 3s and 15s, respectively. ΔV of the sensor attached with CoNb2O6–SE exhibited segmentally linear relationship to the logarithm of NO2 concentration in the ranges of 0.1–2ppm and 2–300ppm, which the sensitivities were 10 and 52mV/decade, respectively. Moreover, the present device also displayed good repeatability, good wet resistance, slight drifts in 30days high- temperature measured period, and excellent selectivity in the presence of various interfering gases at 750°C. Additionally, the mixed potential sensing mechanism was explained quantitatively and further demonstrated from the measurement of polarization curve.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
