Stable mixed metal superconductive oxides containing nitrogen
US5089466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1988 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Jul 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/78
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Stable mixed metal oxide compositions containing nitrogen are formed by treating an oxygen-deficient perovskite composition with nitrogen dioxide. Preferably, the oxygen-deficient perovskite is of the formula X.sub.a Z.sub.b Cu.sub.c O.sub.h wherein X is a member selected from the group consisting of yttrium, scandium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, bismuth and thallium, Z is a member selected from the group consisting of barium, strontium, calcium, magnesium and mixtures thereof, a is not less than 1, b is from 0 to 3, c is from 0 to 3, and h is not greater than about 6, and the mixed metal oxides are of the formula X.sub.a Z.sub.b Cu.sub.c N.sub.j O.sub.k where X, Z, a, b and c are as previously defined, j is from about 0.001 to about 3, and k is from about 6 to about 13.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.