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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.
Binner et al. (Fri,) studied this question.
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