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:
Nov. 13, 1990
Filed:
Sep. 27, 1988
Atit Bhargava, Alfred, NY (US);
Arun K Varshneya, Alfred, NY (US);
Robert L Snyder, Alfred, NY (US);
Alfred University, Alfred, NY (US);
Abstract
A process for preparing a glass-ceramic material with superconducting properties is disclosed. In the first step of this process, a powder batch comprised of a glass-former and of barium oxide, yttrium oxide, and copper oxide (or the precursors of one or more of these oxides) is provided. These oxides (or their precursors) are present in varying amounts for the Ba.sub.2 YCu.sub.3 O.sub.x composition. In the second step of the process, the powder batch is melted at a temperature of from about 1170 to 1300 degrees Celsius while under an oxygen-containing atmosphere. In the third step of the process, the molten batch is rapidly cooled, thereby forming glass. In the fourth step of the process, the glass is heat-treated at a temperature of from about 750 to about 950 degrees Celsius.