Abstract
The YBa 2Cu 3O 7 − x (YBCO)-CuO x phase diagram was determined by differential thermal analysis (DTA), thermogravimetric analysis, hot-stage microscopy, annealing experiments and X-ray identification of phases. YBCO decomposes peritectically to a green phase (Y 2BaCuO 5) and a liquid consisting of BaCuO 2 and CuO x at around 1000–1030 °C, depending on the oxygen partial pressure. As the reversible reaction to form YBCO is sluggish, the DTA experiments indicated low-temperature (eutectic) reactions not belonging to the equilibrium phase diagram. This has consequences for the fabrication of YBCO ceramics and wires. Furthermore, no coexistence region of YBCO and liquid was found, so that YBCO cannot be grown from a “CuO x flux”.
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.
