© 2016 The melting temperature, Tm, of YBa2Cu3O7−xand GdBa2Cu3O7−xsuperconductor ceramic compounds has been measured by differential thermal analysis (DTA) over a large oxygen partial pressure range of five orders of magnitude (2·10−5 < PO2 < 1 bar). It is shown that the DTA peak and endset temperatures are closer to Tmthan the onset temperature. Correct measurement of Tmrequires low heating rates and subatmospheric pressure conditions to avoid temperature shifts due to local oxygen overpressure and kinetic effects.
|Journal||Journal of Alloys and Compounds|
|Publication status||Published - 1 Jan 2017|
- High-Tc superconductors
- Phase transitions
- Thermal analysis