Abstract
Oxygen response of hot spot on DyBa2Cu3O7–x (Dy123) ceramic sensors fabricated under different heat treatments has been studied. Sensor rods A and B were fabricated from presintered bulk Dy123 samples heated for 48 h at around 900 and 960°C respectively. Sensor rod C on the other hand was prepared using similar heat treatment as sample A but was reheated at around 910°C for 24 h after being fabricated into rod shape. For samples A and B, it was observed that increasing the sintering temperature reduced the voltage at peak current by half but only slightly reduced the power consumption. In terms of durability the best performance is shown by sample A. Sample C showed the largest reduction in voltage at peak current and the lowest power consumption but it was the least durable. The effect of heat treatment on I–V behaviour was discussed in terms of differences in microstructure and initial oxygen content of the samples. Oxygen sensing response for sensor B showed that the output current strongly depended on oxygen partial pressure (pO2) with good stability and reproducibility with response time of ∼5 s. The relation between output current and pO2 showed a good agreement with the ideal case of oxygen excess materials, derived from mass action law.
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.
