Process for making 90.degree. K. superconductors by impregnating cellulosic article with precursor solution
US4983573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1989 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/74
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is disclosed an improved process for preparing a superconducting composition having the formula MBa.sub.2 Cu.sub.3 O.sub.x wherein M is selected from the group consisting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tn, Yb and Lu; x is from about 6.5 to about 7.0; said composition having a superconducting transition temperature of about 90.degree. K.; said process consisting essentially of preparing a precursor solution, drying the solution to obtain a solid material, and heating and cooling the solid material under specified conditions to obtain the desired product. In another embodiment, a shaped superconducting MBa.sub.2 Cu.sub.3 O.sub.x article is prepared by impregnating an article of cellulose material with the precursor solution, drying the impregnated article, and heating and cooling the impregnated article under prescribed conditions to obtain the desired product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.