Processing of high-temperature ceramic superconductors - Structure and properties
Abstract
Chemical and crystal structure properties common to all high-Tc ceramic superconductors are discussed. It is shown that all high-Tc ceramic superconductors have layered crystal structures with Cu-O coordination polyhedra typical of Cu(2+) compounds. Intercalation of additional oxygen, which changes the coordination polyhedra at a few atomic sites, is critical to the superconducting properties. All these materials can be processed in a similar manner by traditional ceramic proceessing techiques. Details of processing procedures for several individual compounds, including YBa2Cu3O(x), La(3-x)Ba(3+x)Cu6O(14+delta), La(2-x)AxCuO(4-x)/(2+delta) (where A = Sr, Ba, or Ca), and Y(2-x)Ba(1+x)CuO(6-x)/(2+delta), are presented together with physical and superconducting properties of these structures.
- Publication:
-
Chemistry of High-Temperature Superconductors
- Pub Date:
- 1987
- Bibcode:
- 1987chts.proc..228T
- Keywords:
-
- Ceramics;
- Copper Oxides;
- Crystal Structure;
- High Temperature Superconductors;
- Superconductivity;
- Mixed Oxides;
- Oxide Films;
- Oxygen;
- Solid-State Physics