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Categories: advanced materials, energy

BSA 03-01: Fluorinated Precursors of Superconducting Ceramics

BNL Reference Number: BSA 03-01

Patent Status: U.S. Patent Number 7,361,377 was issued on April 22, 2008

Summary

Structure of superconducting YBa₂Cu₃O₇.

Fluorinated precursors for superconducting ceramics typically increase the critical current in the superconductors they produce. Here the fluorinated precursors are obtained by combining salts of a rare earth, an alkaline earth, and copper in solution, spraying the solution onto a substrate, and heating the covered substrate in a fluorine-containing atmosphere. This is accomplished without the use of trifluoroacetates or physical deposition techniques. The method is suitable for producing superconducting powders and superconducting ceramics on various substrates with reduced cracking.

Description

The method comprises providing a solution comprising a rare earth salt, an alkaline earth metal salt and a copper salt; spraying the solution onto a substrate to provide a film-covered substrate; and heating the film-covered substrate in an atmosphere containing fluorinated gas to provide the fluorinated precursor. Fluorinated precursors of rare earth-alkaline earth metal-cuprate family of superconductors result in high-quality crystalline superconductors when prepared by these methods.

Journal Publication

• Critical current densities and the structural quality of 3- and 4-µm-thick superconducting YBa₂Cu₃O₇ layers synthesized using the ex situ process (.pdf)

Have Questions?

For more information about this technology, contact Kimberley Elcess, (631) 344-4151.