Bulk YBCO high- superconductors with uniform and full oxygen content via microwave processing
J G P Binner; I A H Al-Dawery; J G P Binner; Department of Materials Engineering and Materials Design, The University of Nottingham, University Park, Nottingham NG7 2RD, UK; I A H Al-Dawery; Department of Materials Engineering and Materials Design, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
Журнал:
Superconductor Science and Technology
Дата:
1998-05-01
Аннотация:
The potential for the use of microwave radiation as an alternative energy source for the sintering and annealing of bulk, ceramic high- YBCO superconductors has been investigated with a view to taking advantage of the opportunities presented by this novel heating technique. Microwave heating has been found to offer the possibility of sintering `from the inside out' due to the nature of the temperature profile developed. As a result, ceramic YBCO bodies measuring 35 mm in diameter by 5 mm thick have been produced with completely uniform and high oxygen content (x = 7 in ) and densities up to 98% of theoretical. These properties were achieved using total processing times approximately one sixth of those required conventionally. A model for the microwave heating process is proposed.
598.8Кб