Partial Melt Growth Process of Bi2Sr2Ca1Cu2Ox Textured Tapes on Silver
Abstract
Bi2Sr2Ca1Cu2Ox textured tapes with an excellent Jc were synthesized by doctor-blade casting and a melt process. Green tape was laid on a silver foil and oxide/silver composite tape was heat treated. A highly textured microstructure was formed by slow cooling from 890°C to 870°C with the oxide in a partially melted state. The highest Tc and Jc (77 K, 0 T), 89 K and 1.3× 104 A/cm2, respectively, were obtained by quenching from 870°C. However, Jc at 4.2 K was higher for the sample slowly cooled to room temperature and reached 1.4× 105 A/cm2 at 25 T. These results indicate the potential for the practical application of Bi-based oxide superconductors at both 77 K and 4.2 K.
- Publication:
-
Japanese Journal of Applied Physics
- Pub Date:
- July 1990
- DOI:
- 10.1143/JJAP.29.L1096
- Bibcode:
- 1990JaJAP..29L1096K
- Keywords:
-
- Bismuth Oxides;
- High Temperature Superconductors;
- Melts (Crystal Growth);
- Silver Alloys;
- Superconducting Films;
- Calcium Oxides;
- Copper Oxides;
- Current Density;
- Magnetic Fields;
- Photomicrographs;
- Strontium Compounds;
- Solid-State Physics