Patent · US Expired

Method of making substantially single phase superconducting oxide ceramics having a Tc above 85 degrees

US5106829A · kind A · utility

5Cited by

1References

24Claims

0Family size

Assignee

United States of America as represented by the Secretary of the Air Force · US

Inventors

Syed B. Quadri · Alexandria, US
Louis E. Toth · Washington, US
Michael S. Osofsky · Clarksville, US
Steven H. Lawrence · Fort Washington, US
Donald U. Gubser · Fairfax, US
Stuart A. Wolf · Bowie, US

Key dates

Filing date	Sep 19, 1990
Grant date	Apr 21, 1992
Priority date	—
Expiry date	Sep 19, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S505/78
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A substantially single phase superconducting composition is formed from a of 1:2:3 molar ratio of fine powders of a superconducting rare earth oxide, CuO, and BaCo.sub.3. The mixed powders and shaped articles formed from the mixed powders are calcined, sintered, and cooled in an oxygen containing atmosphere. The cooling step is done slowly to convert the sample to the orthorhombic structure and to improve the superconducting properties. The article formed is a substantially single phase superconducting composition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.