The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2001
Filed:
Oct. 03, 2000
Kenneth H. Sandhage, Upper Arlington, OH (US);
The Ohio State University, Columbus, OH (US);
Abstract
The present invention includes a method for oxygenating oxide superconductive materials, and superconductive oxide materials made by said method. In broadest terms, the method of the present invention is based on an oxygenation strategy which uses temperatures higher than those typically used in the final stages of the oxygenation processes of the prior art. In the method of the present invention, higher oxygen chemical potentials are used to access higher temperatures to allow for higher oxygen diffusivity without a significant decrease in oxygen solubility. The present invention includes a method of oxygenating a rare earth-bearing oxide superconductive material having an initial oxygen content, the method comprising the steps: (a) obtaining a rare earth-bearing oxide superconductive material, the material having an initial oxygen content; and (b) placing the rare earth-bearing oxide superconductive material in contact an oxygen-containing media having an oxygen chemical potential greater than that of pure diatomic oxygen at 1 atmosphere pressure and at 300° C., and raising the temperature of the rare earth-bearing oxide superconductive material to a temperature above about 400° C., and maintaining the rare earth-bearing oxide superconductive material at the temperature and under the chemical potential of oxygen for sufficient time so as to alter the oxygen content of the rare earth-bearing oxide superconductive material from the initial oxygen content.