Abstract
The superconducting powders of YBa 2Cu 3O 7− x were easily prepared from water-in oil type emulsion by loading the yttrium, barium, and copper ions into the aqueous phase. The superconducting orthorhombic phase was formed by calcining at 750°C for 10 h in O 2. The size of the superconducting phase powders was submicron. The density of the sintered specimen using this powders was about 95% of the theoretical density and the resistance sharply decreases at transition temperature.
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