The YBCOPbS high-temperature superconducting system. Further investigations

Abstract

Further investigations on the recently reported YBCOPbS HTS system are reported. The system is found to have conducting BaPbO3 as a second phase, which fills the intergrain vacant spaces forming a composite‐like microstructure. Thermoanalytical investigations revealed that PbS addition enhances the synthesis of the Y‐123‐phase and lowers the temperature of partial melting of this phase, which is essential to further reduce the voids. The metallurgical reaction occurring during sintering is also determined and investigated. It is shown that these composite superconducting materials have better normal‐state, superconducting, and mechanical properties.

Influence of copper(II) sulfide addition on AC susceptibility and electrical properties of YBa2Cu3O7 superconductor

“…Many compounds such as PbS [6,7], CdTe [8], Co 3 O 4 , Mn 3 O 4 , Cr 2 O 3 [9], Co 0.5 Zn 0.5 Fe 2 O 4 [10], Dy 2 O 3 [11], Cr 2 S 3 [12], WO 3 [13], BaTiO 3 [14], TiO 2 [15] and SnO 2 [16] have been added or substituted into YBa 2 Cu 3 O 7-δ . The different magnetic properties showed varied and interesting effects on YBa 2 Cu 3 O 7-δ .…”