| 摘要 |
<p>Improved process for making Tl-Ca-Ba-Cu oxide superconductors. A solution of the nitrates of Ca, Ba, and Cu is reacted with a quaternary ammonium carbonate in a slurry (heel) of Tl2O3. Carbonates of Ca, Ba, and Cu precipitate homogeneously on the Tl2O3 particles. Solids are recovered, dried, and heated to make a superconductor. The method minimizes introduction of contaminants. Novel compositions result.</p> |
