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Process for preparing mercury-barium-calcium-copper-oxide-based superconductor materials. (1999). Process for preparing mercury-barium-calcium-copper-oxide-based superconductor materials. Retrieved from http://purl.flvc.org/fsu/fd/FSU_uspto_5858926
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 (Hg.sub.1-x,Re.sub.x)Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8-y by annealing a precursor mixture containing (Hg.sub.1-x,Re.sub.x)Ba.sub.2 Ca.sub.1 Cu.sub.2 O.sub.6-y at a temperature below about 850.degree. C., wherein x ranges up to about 0.25 and y is a rational number ranging from about negative 1 to about positive 1.
Process for preparing mercury-barium-calcium-copper-oxide-based superconductor materials. (1999). Process for preparing mercury-barium-calcium-copper-oxide-based superconductor materials. Retrieved from http://purl.flvc.org/fsu/fd/FSU_uspto_5858926
