Method of forming superconducting oxide films using zone annealing
US4981839A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Feb 17, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/742
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing a metal-oxidic superconductor material with a high transition temperature and an increased critical current density. The method comprises applying a layer of a metal-oxidic preliminary product comprising the components of the metal-oxidic material, with a crystal structure still having faults, to a substrate, and subsequently, forming the desired superconducting metal-oxide phase by means of a heat and oxygen treatment, where a critical current density of the layer is greater parallel to the surface of the layer than in the direction of the normal of the layer, and wherein the preliminary product is moved through a heated zone parallel to the surface of the layer at a predetermined velocity, wherein the zone has a positive maximum temperature gradient (.DELTA.T/.DELTA.x) measured in the direction of motion, of at least 5 K/mm and preferably of at least 10 to 50 K/mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.