Alfred University

Atit Bhargava

Robert L Snyder

Arun Kumar Varshneya

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.

Process of making a superconducting glass-ceramic composition

A process for preparing a tetragonal barium titanate film with a thickness of from about 0.1 to about 1.5 millimeters is disclosed. In the first step of this process, a mixture of a barium compound, a titanium compound, and a boron oxide glass former is provided in a specified ratio. The reaction mixture is melted at a temperature of 1300-1400 degrees centigrade and then rapidly quenched in form glass. The glass is then place upon a polycrystalline isostructural substrate, and the glass/substrate assembly is then remelted and, thereafter, subjected to a temperature of from 950 to 1,050 degrees centigrade for from about 25 to about 60 minutes.

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Alfred, NY, United States of America

Atit Bhargava