Crystal growth of YBa 2Cu 3O 7-x and reaction of gold crucible with Ba-Cu-rich flux
Abstract
YBa 2Cu 3O 7- x crystals are grown in a gold crucible by a self-flux method. The flux moves along the gold surface due to surface wetting and leaves Y123 crystals behind. The obtained crystals are clean and have a size up to two millimeters and a Tc >90 K. In an effort to recycle the used crucibles, it is found that the used gold is contaminated by copper. A CuO thin film is easily formed on the surface of the crucible that is made of the used gold. This film provides good surface wetting and a buffer layer, which reduces the reaction between gold and the Y-Ba-Cu-oxide melt.
- Publication:
-
Journal of Crystal Growth
- Pub Date:
- November 1991
- DOI:
- 10.1016/0022-0248(91)90041-3
- Bibcode:
- 1991JCrGr.114..279T
- Keywords:
-
- Copper Oxides;
- Crystal Growth;
- High Temperature Superconductors;
- Superconductivity;
- Barium;
- Barium Oxides;
- Copper;
- Crucibles;
- Flux;
- Gold;
- Yttrium Oxides;
- Solid-State Physics