In order to produce more stable and processable forms of YBa2Cu3O7-δ superconductors, a series of cation substitution reactions have been completed. Compounds in the family of Y1-yCayBa1-yLayCu3O 7-δ display an increased corrosion resistance with increasing substitution level. The composition of Y0. 6Ca0. 4Ba1. 6La0. 4Cu3O6. 96 (Tc = 80 K) is found to be at least 100 times more stable than the parent compound, YBa2Cu3O6. 94. In this paper, compositions yielding transition temperature above 83-85 K have been identified in YBa2-xSrxCu3O7-δ and Gd1-xCaxBa2-yLayCu3O 7-δ systems suggesting that the surface reactivity, processability and superconducting properties can be tailored with the use of the appropriate cation compositions. Rational approaches for the systematic tailoring of high-Tc superconductors based on lattice engineering approaches are thus developed.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering