The phase evolution and electrical properties of Tl-1223 tapes were explored near the incongruent melt temperature. Liquid phase evolution was monitored as a function of time and temperature by an acoustic velocity monitor. The phase development kinetics for Tl-based superconductors are more than one order of magnitude faster than the kinetics of Bi-based superconductors. Three separate powder mixtures (Tl2O3 + Ba2Ca2Cu3O7, TlBa2CaCu2Ox + CaCuO2, and TlBa2Ca2Cu3Oy) were used in powder-in-tube processing. Oxygen partial pressure had a significant effect on melt behaviour and microstructure development.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry