Method of depositing a superconducting Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8
US5221661A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/742
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is provided for depositing a dense, high quality, superconducting coating on a substrate of large size and complex shape. The superconducting coating is deposited from a precursor melt that generally comprises the same constituents as the superconducting coating but not necessarily in the same proportions. The liquid precursor melt, which may bear suspended platelike crystals of the superconducting phase, flows into or through a smooth, fine-grained, porous substrate that is largely inert to the liquid precursor. The desired superconducting phase is the sole crystalline phase co-existing with the precursor melt over a range of conditions. The crystals have a pronounced platelike character and form on the substrate with their superconducting planes oriented parallel to the surfaces of the substrate. The precursor may be applied by dipping the substrate into the precursor melt at a temperature just above the liquidus, or by painting on a suspension, slurry, or paste of precursor material and heating the substrate to melt the precursor. The platelike crystals of the superconducting phase of the precursor melt form on the substrate and residual liquid flows into and through th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.