Abstract
A hot spot, which is a glowing orange local area, appears in REBa2Cu3Oy (RE: rare earth) ceramic rods when a voltage exceeding a certain value is applied at room temperature. After a hot spot appears, the current changes according to the partial pressure of oxygen in the ambient atmosphere, acting as an oxygen sensor without the need for a heating system. In this study, the moisture resistance and oxygen-sensing characteristics of 5 mol% Nd2BaCuO5-added Nd1+xBa2−xCu3Oy (x = 0–0.8) rods were investigated by preparing ceramic rods via a solid-state reaction at 960 °C. The moisture resistance improved at x ≥ 0.4. In the case of x ≤ 0.4, the current increased as the voltage increased, reached its peak value, and subsequently decreased. Finally, the current increased monotonically with increasing voltage at x ≥ 0.6. Furthermore, the sensitivity to gas was not strongly affected by the changes in x. The characteristics are discussed from the viewpoint of the heat balance in the rod and lattice defects of the material.
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.
