| 摘要 |
The present invention is directed to a process for preparing a HgBaCaCuO superconductor by annealing a precursor mixture comprising a lower member of the homologous HgBaCaCuO superconductor series, a source of calcium and a source of copper. The precursor mixture may further comprise a source of oxygen, a source of rhenium, and, if desired, a source of an additional element selected from the group consisting of halogens and metals other than mercury, barium, calcium, copper and rhenium. The process is particularly effective for preparing (Hg1-x,Rex)Ba2Ca2Cu3O8-y by annealing a precursor mixture containing (Hg1-x,Rex)Ba2Ca1Cu2O6-y at a temperature below about 850 DEG C., wherein x ranges up to about 0.25 and y is a rational number ranging from about negative 1 to about positive 1.
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