THE PROCESSING, PROPERTIES, AND PROSPECTS OF TL-1223

This overview briefly describes the process technology adaptable to TlBa2Ca2Cu3O9 superconductor fabrication. A pivotal feature is the high volatility of thallium oxide, which basically separates the field into open and closed approaches. The latter includes the powder-in-tube, which yields no granular alignment and weak-linked transport characteristics. In contrast, open-system processing yields a unique microstructure that results in high critical current and goon performance in magnetic fields.