| 摘要 |
A melting-and-solidification manufacturing method for manufacturing an ingot of a high critical temperature superconductive oxide belonging, in particular, to the YBaCuO, BiSrCaCuO, or TlBaCaCuO families, wherein: an ingot of oxide having the appropriate stoichiometery is used; the ingot is held horizontally by levitation on a film of gas inside a furnace; the ingot is melted; a vertical thermal gradient is established inside said furnace such that nucleation starts at the bottom portion of said ingot; while maintaining said thermal gradient, the overall temperature of the furnace is lowered at a rate of not more than 0.1 DEG C./hour down to the temperature which corresponds to complete ingot solidification; and finally, conventional oxygenation treatment is applied to said ingot.
|
