Powder containing thallium, calcium, barium and copper

摘要

Improved process for making Tl-Ca-Ba-CuO superconductors. A solution of the monocarboxylates (e.g., acetates) of Ca, Ba, and Cu is dried, calcined, mixed with Tl2O3, and the mixture is heated to make a superconductor. The method minimizes introduction of contaminants. Novel compositions result.