Method for fabricating superconductive film
US4914080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jan 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/732
Abstract
A method for fabricating a superconductive film composed of a RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.x compound, or a (Bi.Sr.Ca.Cu.O) compound. In a first embodiment, oxides or carbonates of the component materials, namely Y.sub.2 O.sub.3, BaCO.sub.3, and CuO are mixed in atomic ratios of 1:2:3, according to the chemical formula of RE.sub.1 Ba.sub.2 Cu.sub.3 O.sub.x, and sintered to create a rhombic perovskite structure. The sintered mixture is powdered again, with added powdered amounts of Y.sub.2 O.sub.3 and powdered metallic Cu, and sintered. The sintered product is used as the source for an electron beam evaporator. In a second embodiment the (Bi.Sr.Ca.Cu.O) compound is formed into a sintered pellet which is composed of a mixture of one part of BiO, 3-15 parts of SrCO.sub.3, 4-30 parts of CaCO.sub.3, and 2-5 parts of CuO, in atomic ratios of Bi, Sr, Ca and Cu.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.